Kotlin version 1.5.4
Issue: API Call failed with reason: failed with exception: kotlinx.coroutines.JobCancellationException: Parent job is Completed;

Hi there, this piece of code is causing an exception:
ktor/ktor-client/ktor-client-core/common/src/io/ktor/client/features/observer/ResponseObserver.kt
@Suppress("UNCHECKED_CAST")
(response.coroutineContext[Job] as CompletableJob).complete()
proceedWith(context.response)

Even though I am not a coroutine expert I suspect that when HttpClientCall -> receive method is called and more specifically the part below, the job is already completed and this is causing the exception to be thrown.
This is a quite major issue because it results in randomly losing API call responses.

val result = currentClient.responsePipeline.execute(this, subject).response
ref: https://github.com/ktorio/ktor/blob/764cad998700430f54f3e6c77edb53159d75d7c3/ktor-client/ktor-client-core/common/src/io/ktor/client/call/HttpClientCall.kt#L74
Is there a workaround or a fix?

Some users of my app are getting the following crash:

Fatal Exception: java.nio.charset.IllegalCharsetNameException: %s
       at java.nio.charset.Charset.checkName(Charset.java:317)
       at java.nio.charset.Charset.lookup2(Charset.java:519)
       at java.nio.charset.Charset.lookup(Charset.java:497)
       at java.nio.charset.Charset.forName(Charset.java:563)
       at io.ktor.http.ContentTypesKt.charset(ContentTypesKt.java:271)
       at io.ktor.http.HttpMessagePropertiesKt.charset(HttpMessagePropertiesKt.java:79)
       at io.ktor.client.statement.HttpStatementKt.readText(HttpStatementKt.java:169)
       at io.ktor.client.statement.HttpStatementKt.readText$default(HttpStatementKt.java:168)
       at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invokeSuspend(DefaultResponseValidationKt.java:36)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(BaseContinuationImpl.java:33)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.java:106)
       at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.java:571)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.java:750)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.java:678)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.java:665)

Looks like that for some reason the charset seems to be %s. I am not sure why that is the case. However, I do not think that this should crash the app. I think it would be better if Ktor could just fall back to UTF8 when the charset is invalid. Would that be possible in Ktor?

I am using a manually built version of Ktor based on this commit: https://github.com/Thomas-Vos/ktor/commit/6dceed335d2de689dd30e3cb1d62d571c8061041

It is possible that CallLogging feature may crash with "java.lang.IllegalStateException: Mutex is not locked" because of cancellation during beginLogging -> mutex.lock

Hi there. what is a good way to approach debugging this?
I am using suspend fun as well as Flows and awaits, but I am not sure where to start with this.
on Slack, Roman suggested this might be ktor related.

Exception in thread "main" java.lang.ClassCastException: kotlin.coroutines.intrinsics.CoroutineSingletons cannot be cast to io.ktor.client.statement.HttpResponse
        at com.github.wakingrufus.kalibrate.example.MainKt$main$2$4$1$1$1.invoke(Main.kt:68)
        at com.github.wakingrufus.kalibrate.example.MainKt$main$2$4$1$1$1.invoke(Main.kt)
        at com.github.wakingrufus.kalibrate.scenario.Step.invoke(Step.kt:15)
        at com.github.wakingrufus.kalibrate.scenario.StepContainer$invoke$1.invokeSuspend(Simulation.kt:93)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
        at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)
        at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:86)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:61)
        at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt)
        at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
        at com.github.wakingrufus.kalibrate.scenario.StepContainer.invoke(Simulation.kt:91)
        at com.github.wakingrufus.kalibrate.scenario.Simulation.runSetup(Simulation.kt:75)
        at com.github.wakingrufus.kalibrate.scenario.Simulation$singletonWorkPattern$1$1$1.invokeSuspend(Simulation.kt:25)
        at com.github.wakingrufus.kalibrate.scenario.Simulation$singletonWorkPattern$1$1$1.invoke(Simulation.kt)
        at kotlinx.coroutines.flow.SafeFlow.collectSafely(Builders.kt:61)
        at kotlinx.coroutines.flow.AbstractFlow.collect(Flow.kt:212)
        at kotlinx.coroutines.flow.FlowKt__MergeKt$flattenConcat$$inlined$unsafeFlow$1.collect(SafeCollector.common.kt:114)
        at kotlinx.coroutines.flow.internal.ChannelFlowMerge$collectTo$$inlined$collect$1$lambda$1.invokeSuspend(Merge.kt:69)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
        at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)
        at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:86)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:61)
        at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt)
        at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
        at com.github.wakingrufus.kalibrate.KalibrateDslBuilder.invoke(KalibrateDsl.kt:92)
        at com.github.wakingrufus.kalibrate.KalibrateDslKt$kalibrate$1.invoke(KalibrateDsl.kt:125)
        at com.github.wakingrufus.kalibrate.KalibrateDslKt$kalibrate$1.invoke(KalibrateDsl.kt)
        at com.xenomachina.argparser.SystemExitExceptionKt.mainBody(SystemExitException.kt:74)
        at com.xenomachina.argparser.SystemExitExceptionKt.mainBody$default(SystemExitException.kt:72)
        at com.github.wakingrufus.kalibrate.KalibrateDslKt.kalibrate(KalibrateDsl.kt:124)
        at com.github.wakingrufus.kalibrate.example.MainKt.main(Main.kt:16)

source:
https://github.com/wakingrufus/kalibrate

to reproduce:
cd kalibrate-example/
./example.sh --scenario deploy

When executing Unit Test, runBlocking must be executed to call suspend.

But IosClientEngine.kt specifies the callback thread as the main thread when creating NSURLSession. Once the main thread is locked, this callback cannot return.

Should change

         val session = NSURLSession.sessionWithConfiguration(
             configuration,
             responseReader.freeze(),
             delegateQueue = NSOperationQueue.mainQueue()
         )

to

         val session = NSURLSession.sessionWithConfiguration(
             configuration,
             responseReader.freeze(),
             delegateQueue = NSOperationQueue.currentQueue()
         )

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1333

Ktor Version and Engine Used (client or server and name)
io.ktor:ktor-client-core:1.2.4
io.ktor:ktor-client-core-jvm:1.2.4
io.ktor:ktor-client-apache:1.2.4

Describe the bug
Apache HTTP Client does not send Content-Length header if body is empty content.
CIO send the header correctly.

To Reproduce
Steps to reproduce the behavior:

1. Write the following

val apacheClient = HttpClient(Apache)
apacheClient.put<HttpResponseData>("http://example.com/") 
apacheClient.post<HttpResponseData>("http://example.com/")
apacheClient.patch<HttpResponseData>("http://example.com/")

2. Run on jvm
3. The sent header does not contain Content-Length

{
  "accept-charset": "UTF-8",
  "accept": "*/*",
  "user-agent": "Ktor client",
  "host": "example.com",
  "connection": "Keep-Alive" 
}

Some endpoints that do not require body return 411 Length Required.

Expected behavior
Content-Length: 0 Should be sent.

Apache seems not to send Content-Length if entity is null.
Following code sent the header correctly.

apacheClient.put<HttpResponseData>("http://example.com/"){
    body = ""
}

The relevant part of the code in ktor:
https://github.com/ktorio/ktor/blob/f3858b2bd95dcb35aa7755451403e7cab1dd678c/ktor-client/ktor-client-apache/jvm/src/io/ktor/client/engine/apache/ApacheRequestProducer.kt#L122-L155

and org.apache.http.client.methods.RequestBuilder 's build() method.

There are cases where the client of a digest authentication has no knowledge of the realm value. For this scenario, a case in which the realm contained in the 401 response is immediately used should be added.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/541

Simple demo:

https://github.com/ktorio/ktor-samples/compare/master...marshallpierce:html-builder-status-pages-swallows-exceptions?expand=1

Expected behavior: I would expect the default to involve a 500 and the exception being logged somewhere, hopefully customizable via StatusPages. Rendering part of the DSL's execution with a 200 is highly misleading, to say the least.

When initializing the application with applicationEngineEnvironment(…) any exception on module { … } will lead to the block being executed twice. This may lead to unexpected results.

For example:

val env = applicationEngineEnvironment {
    config = HoconApplicationConfig(ConfigFactory.load())
    
    module {
      install(DefaultHeaders) {
          header(HttpHeaders.Server, "My Server")
      }

      // simulate that something goes wrong
      throw Exception("I am hidden.")
    }

    connector {
        host = config.property("deployment.host").getString()
        port = config.property("deployment.port").getString().toInt()
    }
}

embeddedServer(Netty, env).start(true)

Here the real exception "I am hidden" is shadowed by

io.ktor.application.DuplicateApplicationFeatureException: Conflicting application feature is already installed with the same key as `Default Headers`

since the feature is installed twice.

The originates from this code in ApplicationEngineEnvironmentReloading.instantiateAndConfigureApplication:

try {
    launchModuleByName(name, currentClassLoader, newInstance)
} catch (_: Throwable) {
    module(newInstance)
}

https://github.com/ktorio/ktor/blob/1bd92eaa4974dc0b09757c635895ce0e38474a95/ktor-server/ktor-server-host-common/jvm/src/io/ktor/server/engine/ApplicationEngineEnvironmentReloading.kt#L303

I would expect this to only catch exceptions specific to launchModuleByName or handle errors differently.

Reproducer:

suspend fun main() {
    val channel = ByteChannel(true)

    println(channel.availableForRead) //prints 0
    channel.writePacket {
        writeText("hello")
    }
    println(channel.availableForRead) //prints 5
    val packet = channel.readRemaining(channel.availableForRead.toLong()) //suspend...
//    val packet = channel.readPacket(channel.availableForRead)
    println(packet.readText())
}

Channel has 5 bytes available for read.
Contract of availableForRead says, that:

    /**
     * Returns number of bytes that can be read without suspension. Read operations do no suspend and return
     * immediately when this number is at least the number of bytes requested for read.
     */
    public actual val availableForRead: Int

But in readRemaining it suspends on trying to read...
Using readPacket it works ok.

Using ByteChannelSequential on JVM don't suspend on both calls. On K/N the same - both don't suspends.

Looks like it regression after KTOR-1268. Caused by this change: https://github.com/ktorio/ktor/pull/2214/files#diff-408be3eaf4a8ec196449c0483c1525a24450590d9473ebcc3a5bc3798326e3e7L2234-R2222
Now channel is trying to read one byte, even if it's not needed.

Reproduced on:
kotlin: 1.4.32
ktor: 1.5.3

Minimal reproducer:
on K/N:

fun main() = runBlocking {
    val channel = ByteChannel(true)
    channel.writePacket {
        writeText("h")
    }
    channel.close()
    val packet = withTimeoutOrNull(1000) {
        //    val packet = channel.readRemaining(5L)
        channel.readPacket(5)
    }
    println(packet?.readText())
}

Channel closed, but readPacket freezes forever - even not fail by timeout.
Same behavior is if using ByteChannelSequentialJVM(IoBuffer.Empty, true) on K/JVM.
If using ByteBufferChannel on JVM - behavior is ok, exception is thrown:

Exception in thread "main" kotlinx.coroutines.channels.ClosedReceiveChannelException: Unexpected EOF: expected 4 more bytes
	at io.ktor.utils.io.ByteBufferChannel.readFullySuspend(ByteBufferChannel.kt:598)
	at io.ktor.utils.io.ByteBufferChannel.readFully(ByteBufferChannel.kt:590)
	at io.ktor.utils.io.ByteBufferChannel.readPacketSuspend(ByteBufferChannel.kt:806)
	at io.ktor.utils.io.ByteBufferChannel.readPacket$suspendImpl(ByteBufferChannel.kt:792)
	at io.ktor.utils.io.ByteBufferChannel.readPacket(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteReadChannelKt.readPacket(ByteReadChannel.kt:202)
	at AppKt$main$1$packet$1.invokeSuspend(App.kt:57)

If to use readRemaining - for any channel, behavior is the same, it reads packet with one letter and prints it.

@OptIn(InternalAPI::class)
suspend fun main() {
    val connection = aSocket(SelectorManager()).tcp().bind(port = 8000).accept().connection()
    while (true) {
        delay(1000)
        connection.output.writePacket(buildPacket {
            writeText("1".repeat(128))
        })
        connection.output.flush()
    }
}

@OptIn(InternalAPI::class)
fun main() = runBlocking {
    val connection = aSocket(SelectorManager()).tcp().connect("0.0.0.0", port = 8000).connection()
    while (true) {
        val packet = withTimeoutOrNull(5000) {
            println("await")
            val packet = connection.input.readRemaining(128)
//            val packet = connection.input.readPacket(128)
            require(packet.remaining == 128L) { "Length should be 128 but was ${packet.remaining}" }
            packet
        }
        println("received: ${packet?.readText()}")
    }
}

await
received: 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
await
received: 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

Uncaught Kotlin exception: kotlin.IllegalArgumentException: Length should be 128 but was 0

Exception in thread "main" java.lang.IllegalArgumentException: Length should be 128 but was 0

Exception in thread "main" kotlinx.coroutines.channels.ClosedReceiveChannelException: Unexpected EOF: expected 128 more bytes
	at io.ktor.utils.io.ByteBufferChannel.readFullySuspend(ByteBufferChannel.kt:598)
	at io.ktor.utils.io.ByteBufferChannel$readFullySuspend$1.invokeSuspend(ByteBufferChannel.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:86)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:61)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at AppKt.main(App.kt:24)
	at AppKt.main(App.kt)

Reproduced on:
kotlin: 1.4.32
ktor: 1.5.3
os: macos
K/N target: macos, both release and debug

This issue was imported from GitHub issue: https://github.com/ktorio/ktorio.github.io/issues/268

https://ktor.io/clients/http-client/features/timeout.html

The Client Timeout Feature states that "By default all these timeouts are infinite"; this doesn't seem to be the case with either the Apache or CIO engines where unless I explicitly set a timeout I get:

Apache

io.ktor.network.sockets.SocketTimeoutException: Socket timeout has been expired [url=http://localhost:1080/api/import/tickets/v1/file, socket_timeout=unknown] ms
	at io.ktor.client.features.HttpTimeoutKt.SocketTimeoutException(HttpTimeout.kt:170)
	at io.ktor.client.engine.apache.ApacheHttpRequestKt$sendRequest$$inlined$suspendCancellableCoroutine$lambda$2.failed(ApacheHttpRequest.kt:44)
	at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:137)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.executionFailed(DefaultClientExchangeHandlerImpl.java:101)
	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.failed(AbstractClientExchangeHandler.java:426)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.timeout(HttpAsyncRequestExecutor.java:387)
	at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:92)
	at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:39)
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.timeout(AbstractIODispatch.java:175)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.sessionTimedOut(BaseIOReactor.java:261)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.timeoutCheck(AbstractIOReactor.java:502)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.validate(BaseIOReactor.java:211)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.net.SocketTimeoutException: 10,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE]
	... 11 common frames omitted

CIO (which doesn't seem to accept specifying timeouts at all)

kotlinx.coroutines.TimeoutCancellationException: Timed out waiting for 15000 ms
	at kotlinx.coroutines.TimeoutKt.TimeoutCancellationException(Timeout.kt:149)
	at kotlinx.coroutines.TimeoutCoroutine.run(Timeout.kt:119)
	at kotlinx.coroutines.EventLoopImplBase$DelayedRunnableTask.run(EventLoop.common.kt:493)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:272)
	at kotlinx.coroutines.DefaultExecutor.run(DefaultExecutor.kt:68)
	at java.base/java.lang.Thread.run(Thread.java:834)

https://helpserver.labs.jb.gg/help/ktor/1.6.0/request.html#upload_file

https://helpserver.labs.jb.gg/help/ktor/1.6.0/response.html#download-progress

• Add API links
• Add working examples

This issue was imported from GitHub issue: https://github.com/ktorio/ktorio.github.io/issues/96

Pages like https://ktor.io/quickstart/quickstart/gradle.html lack ready-to-download (and use) example projects

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1004

Ktor Version

1.1.3 with Tomcat and Gradle

Operating System

Operating system: MacOS High Sierra

Feedback

By following the steps in documentation to generate a FatJar, whenever I try to execute my Ktor application by using the command java -jar pathToFatJar, I receive de following error:

Exception in thread "main" java.lang.UnsupportedOperationException: Packages and file facades are not yet supported in Kotlin reflection. Meanwhile please use Java reflection to inspect this class: class com.tidelevel.ApplicationKt
	at kotlin.reflect.jvm.internal.KClassImpl.reportUnresolvedClass(KClassImpl.kt:301)
	at kotlin.reflect.jvm.internal.KClassImpl.access$reportUnresolvedClass(KClassImpl.kt:43)
	at kotlin.reflect.jvm.internal.KClassImpl$Data$descriptor$2.invoke(KClassImpl.kt:53)
	at kotlin.reflect.jvm.internal.KClassImpl$Data$descriptor$2.invoke(KClassImpl.kt:44)
	at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:92)
	at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:31)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.getDescriptor(KClassImpl.kt)
	at kotlin.reflect.jvm.internal.KClassImpl$Data$objectInstance$2.invoke(KClassImpl.kt:106)
	at kotlin.reflect.jvm.internal.ReflectProperties$LazyVal.invoke(ReflectProperties.java:62)
	at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:31)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.getObjectInstance(KClassImpl.kt)
	at kotlin.reflect.jvm.internal.KClassImpl.getObjectInstance(KClassImpl.kt:239)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.createModuleContainer(ApplicationEngineEnvironmentReloading.kt:328)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.executeModuleFunction(ApplicationEngineEnvironmentReloading.kt:317)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.instantiateAndConfigureApplication(ApplicationEngineEnvironmentReloading.kt:275)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.createApplication(ApplicationEngineEnvironmentReloading.kt:127)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.start(ApplicationEngineEnvironmentReloading.kt:247)
	at io.ktor.server.tomcat.TomcatApplicationEngine.start(TomcatApplicationEngine.kt:108)
	at io.ktor.server.tomcat.EngineMain.main(EngineMain.kt:16)

This error just happen when trying to execute the FatJar in command line, everything works fine when running in Intellij. I have seen similar issues at:

• https://github.com/ktorio/ktor/issues/386
• https://stackoverflow.com/questions/54282790/ktor-running-fat-jar-throws-java-lang-unsupportedoperationexceptionpackages-an

By changing the mainClassName property to correspond to my own Application class, everything seems to work fine! I am not sure if the documentation needs to be updated in this page or if I did something wrong.

Hope I receive an answer from you!

It should be Groovy Kotlin Maven instead of Groovy Kotlin Kotlin
https://ktor.io/docs/testing.html#example-with-dependencies

Should cover multiplatform scenarios also

https://ktor.io/clients/http-client/quick-start/requests.html -- This is another page that describes post requests (among with other requests).
First of all, it does not teach what is contentType parameter of the TextContent constructor (please, add explanation)
Second of all, the only example about using JsonFeature tells:

If you install the JsonFeature, and set the content type to application/json you can use arbitrary instances as the body, and they will be serialized as JSON:

but in the code snippet provided for this example there is no contentType set, and it has incorrect code (please, fix):

// !!!!!!!    @Serializable is missing here !!!!!!
data class HelloWorld(val hello: String)

val client = HttpClient(Apache) {
    install(JsonFeature) {
        serializer = GsonSerializer {
            // Configurable .GsonBuilder
            serializeNulls()
            disableHtmlEscaping()
        }
    }
}

client.post<Unit> {
    url("http://127.0.0.1:8080/")
    body = HelloWorld(hello = "world")
    // !!!!!!!    contentType(ContentType.Application.Json) is missing here !!!!!!
}

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/386

Followed instruction here https://ktor.io/servers/deploy.html for fat jar deployment

When I run java -jar myjar.jar , i get main class could'nt be found in io.ktor.server.netty.DevelopmentEngine.

Project runs fine in IDEA

Any idea why?

Including Kotlinx HTML DSL as the templating language results in the following line in the configuration:

maven { url = uri("https://maven.pkg.jetbrains.space/public/p/kotlinx-html/maven") }

Since kotlinx-html-jvm:0.7.3 is already published on mavenCentral, there is no need for this line anymore going forward, and it can be removed. (Relates to KTOR-2203, which can be closed, I suppose.)

IntelliJ IDEA 2021.1 with Ktor plugin 1.5.3

1. New Project - Ktor
2. Add Feature - Thymeleaf
3. Open Templating.kt file

Actual result: templates/thymeleaf/ is mentioned in code but there is no such directory and index file in project

fun Application.configureTemplating() {
    install(Thymeleaf) {
        setTemplateResolver(ClassLoaderTemplateResolver().apply {
            prefix = "templates/thymeleaf/"
            suffix = ".html"
            characterEncoding = "utf-8"
        })
    }

    routing {
        get("/html-thymeleaf") {
            call.respond(ThymeleafContent("index", mapOf("user" to ThymeleafUser(1, "user1"))))
        }
    }
}

To reproduce create a new project via the IDEA plugin without any feature and run generated application using Gradle:

./gradlew run

As a result the app crashes with the following error:

> Task :run FAILED
2021-04-08 16:20:57.086 [main] TRACE Application - No configuration provided: neither application.conf nor system properties nor command line options (-config or -P:ktor...=) provided
Exception in thread "main" java.lang.IllegalArgumentException: Neither port nor sslPort specified. Use command line options -port/-sslPort or configure connectors in application.conf
	at io.ktor.server.engine.CommandLineKt$commandLineEnvironment$environment$1.invoke(CommandLine.kt:142)
	at io.ktor.server.engine.CommandLineKt$commandLineEnvironment$environment$1.invoke(CommandLine.kt)
	at io.ktor.server.engine.ApplicationEngineEnvironmentBuilder.build(ApplicationEngineEnvironment.kt:110)
	at io.ktor.server.engine.ApplicationEngineEnvironmentKt.applicationEngineEnvironment(ApplicationEngineEnvironment.kt:46)
	at io.ktor.server.engine.CommandLineKt.commandLineEnvironment(CommandLine.kt:61)
	at io.ktor.server.netty.EngineMain.main(EngineMain.kt:21)

Adding "Gson" and "Kotlinx.Serialization" dependencies in the same wizard project generates the following code:

install(ContentNegotiation) {
    gson {
    }
}
install(ContentNegotiation) {
    json()
}

// . . .

routing {
    get("/json/gson") {
        call.respond(mapOf("hello" to "world"))
    }
}
routing {
    get("/json/kotlinx-serialization") {
        call.respond(mapOf("hello" to "world"))
    }
}

This (expectedly) crashes at first run:

Exception in thread "main" java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)

Caused by: io.ktor.application.DuplicateApplicationFeatureException: Conflicting application feature is already installed with the same key as `ContentNegotiation`
	at io.ktor.application.ApplicationFeatureKt.install(ApplicationFeature.kt:82)
	at com.example.ApplicationKt.module(Application.kt:27)
	at com.example.ApplicationKt.module$default(Application.kt:21)

If you want to use the latest eap release of Ktor and use a library, which uses Ktor as api dependency, eg a Ktor plugin, Gradle don't use the main-buildNumber release over a published version.

Reason: 1.5.3 is preferred over main-133. The eap builds should use the version property with the prefix instead, eg 1.6.0-main-133. This tells Gradle to use the main eap version for all dependencies, because 1.6.0 > 1.5.4.

See the attached project
Run the test with/without removed line implementation(ratelimit) in build.gradle.kts.

The new simulator requires watchosX64 (added in Kotlin 1.5.0). Please add it to the supported architectures

If you want to build KTOR on a new fresh Mac, you need curl. The primary option to install curl is using Homebrew, which change the default installation path from /usr/local to /opt/homebrew from 2.5.10. The installation path will only change for new brew installation, to prevent crashing stable installation. On Apple M1 chip, it will always use the new installation path by default.

Fix:
Add "/opt/homebrew/opt/curl/include/curl", to the build script

When selecting the CIO option in the Project Wizard, it uses "Netty" as parameter to the embeddedServer function as opposed to CIO.

Created selecting a bunch of features. Security.kt imports Auth0 which is not referenced.

In addition

• makeJwtVerifier is not implemented
• MySession is not implemented

IJ 212 Nightly

1. Open New Project wizard
2. Select Ktor
3. Close New Project wizard

2021-04-30 10:44:27,515 [ 181985]  ERROR - tellij.openapi.util.ObjectTree - Memory leak detected: 'io.ktor.initializr.intellij.features.KtorFeaturesStep' of class io.ktor.initializr.intellij.features.KtorFeaturesStep is registered in Disposer but wasn't disposed.
Register it with a proper parentDisposable or ensure that it's always disposed by direct Disposer.dispose call.
See https://jetbrains.org/intellij/sdk/docs/basics/disposers.html for more details.
The corresponding Disposer.register() stacktrace is shown as the cause:
 
java.lang.RuntimeException: Memory leak detected: 'io.ktor.initializr.intellij.features.KtorFeaturesStep' of class io.ktor.initializr.intellij.features.KtorFeaturesStep is registered in Disposer but wasn't disposed.
Register it with a proper parentDisposable or ensure that it's always disposed by direct Disposer.dispose call.
See https://jetbrains.org/intellij/sdk/docs/basics/disposers.html for more details.
The corresponding Disposer.register() stacktrace is shown as the cause:

	at com.intellij.openapi.util.ObjectTree.assertIsEmpty(ObjectTree.java:227)
	at com.intellij.openapi.util.Disposer.assertIsEmpty(Disposer.java:167)
	at com.intellij.openapi.util.Disposer.assertIsEmpty(Disposer.java:162)
	at com.intellij.openapi.application.impl.ApplicationImpl.disposeContainer(ApplicationImpl.java:246)
	at com.intellij.openapi.application.impl.ApplicationImpl.disposeSelf(ApplicationImpl.java:263)
	at com.intellij.openapi.application.impl.ApplicationImpl.doExit(ApplicationImpl.java:650)
	at com.intellij.openapi.application.impl.ApplicationImpl.exit(ApplicationImpl.java:603)
	at com.intellij.openapi.application.impl.ApplicationImpl.exit(ApplicationImpl.java:592)
	at com.intellij.openapi.application.ex.ApplicationEx.exit(ApplicationEx.java:73)
	at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeFrame$3.windowClosing(WelcomeFrame.java:117)
	at java.desktop/java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:357)
	at java.desktop/java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:357)
	at java.desktop/java.awt.Window.processWindowEvent(Window.java:2090)
	at java.desktop/javax.swing.JFrame.processWindowEvent(JFrame.java:298)
	at java.desktop/java.awt.Window.processEvent(Window.java:2049)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2784)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:896)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:768)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:434)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:825)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:433)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:842)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:487)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.Throwable
	at com.intellij.openapi.util.ObjectNode.<init>(ObjectNode.java:31)
	at com.intellij.openapi.util.ObjectTree.createNodeFor(ObjectTree.java:99)
	at com.intellij.openapi.util.ObjectTree.register(ObjectTree.java:60)
	at com.intellij.openapi.util.Disposer.register(Disposer.java:73)
	at com.intellij.util.Alarm.<init>(Alarm.java:130)
	at com.intellij.openapi.ui.LoadingDecorator.<init>(LoadingDecorator.java:54)
	at com.intellij.openapi.ui.LoadingDecorator.<init>(LoadingDecorator.java:47)
	at com.intellij.openapi.ui.LoadingDecorator.<init>(LoadingDecorator.java:43)
	at com.intellij.ui.components.JBLoadingPanel.lambda$new$0(JBLoadingPanel.java:29)
	at com.intellij.ui.components.JBLoadingPanel.<init>(JBLoadingPanel.java:38)
	at com.intellij.ui.components.JBLoadingPanel.<init>(JBLoadingPanel.java:29)
	at io.ktor.initializr.intellij.features.KtorFeaturesStep.<init>(KtorFeaturesStep.kt:33)
	at io.ktor.initializr.intellij.KtorModuleBuilder.createWizardSteps(KtorModuleBuilder.kt:63)
	at com.intellij.ide.util.newProjectWizard.StepSequence.addStepsForBuilder(StepSequence.java:52)
	at com.intellij.ide.projectWizard.ProjectTypeStep.<init>(ProjectTypeStep.java:234)
	at com.intellij.ide.projectWizard.NewProjectWizard.init(NewProjectWizard.java:57)
	at com.intellij.ide.projectWizard.NewProjectWizard.<init>(NewProjectWizard.java:46)
	at com.intellij.ide.actions.NewProjectAction.actionPerformed(NewProjectAction.java:20)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performAction(ActionUtil.java:247)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:236)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAwareWithCallbacks(ActionUtil.java:229)
	at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreenActionsUtil.performAnActionForComponent(WelcomeScreenActionsUtil.java:96)
	at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreenActionsUtil$ToolbarTextButtonWrapper$1.actionPerformed(WelcomeScreenActionsUtil.java:56)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
	at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
	at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:270)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6652)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3345)
	at java.desktop/java.awt.Component.processEvent(Component.java:6417)
	at java.desktop/java.awt.Container.processEvent(Container.java:2263)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2784)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:896)
	at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:828)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:765)
	... 11 more

To reproduce:

1. Create KMM project
2. Add Ktor module
   Expected: Ktor module is added
   Actual: Ktor module is not added with an error message "Error adding module to project: Module already exists"

On the attached video root module is called "karta" and new Ktor module is "zzz", but the error eventually says that module "karta" already exists.

Tried to restart IDE and and invalidate caches.

IU-211.6693.111, JRE 11.0.10+9-b1341.35x64 JetBrains s.r.o., OS Mac OS X(x86_64) v11.2.3, screens 5120.0x2880.0, 5120.0x2880.0, 2880.0x5120.0; Retina

Example:

route("path1/path2") {
    get {}
    post {}
}

path1/path2 will not be visible in Endpoints View while it must be there twice: for POST and for GET methods.

I have a HOCON config file that contains the field ktor.deployment.port. Expected behaviour is that the flag -port will override its value so I'll be able to access current server port using environment.config.property("ktor.deployment.port").getString(), but it doesn't work and will return the value from configuration file.

At the same time flag -P:ktor.deployment.port works fine.

Stack trace:

java.io.IOException: Broken delimiter occurred
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invokeSuspend(Delimited.kt:58)
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invoke(Delimited.kt)
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invoke(Delimited.kt)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend$suspendImpl(ByteBufferChannel.kt:1822)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend(ByteBufferChannel.kt)
	at io.ktor.utils.io.DelimitedKt.skipDelimiterSuspend(Delimited.kt:56)
	at io.ktor.utils.io.DelimitedKt.skipDelimiter(Delimited.kt:51)
	at io.ktor.http.cio.MultipartKt$parseMultipart$1.invokeSuspend(Multipart.kt:378)

Reproducible with the following command using the attached file:

nc localhost 8080 < req.txt

This test passes -- note the ///

    @Test
    internal fun routeSlashes() {
        withTestApplication({
            routing {
                get("/") {
                    call.respond("OK: ${(call as RoutingApplicationCall).route}")
                }
            }
        }) {
            with(handleRequest(HttpMethod.Get, "/")) {
                assertEquals("OK: ///(method:GET)", response.content)
            }
        }
    }

If the route is declared with get(""), Route.toString() results in /(method:GET), which is what I would expect in both cases.

While working with Ktor i found out a very weird issue. In the code below whenever I make a request with GET method to /api/user/sth app responds with status 404. I tried it with every other method and every single one worked except get.

route("/api/") {
  route("/user/*") {
    handle {
      println(call.request.uri)
    }
  }
}

exception handler installed via statuspage doesn't catch exceptions throws by respondWriteChannelContent.

For example with the ContentNegotiation plugin when I have a serialization error I just have a log: io failed generated here and catched here.

I'd like to be able to intercept or catch the exception so I can have more useful error message.

Certain exceptions, like ConnectException is caught by IOException filter in logFailure, and produce unhelpful "io failed" message. This should be improved to provide actual exception type and message.

Hi,

First of all, thank you for creating and maintaining ktor, we enjoy using it a lot! The issue we notice that after v1.5.2, developmentMode value is set as true by default in tests (more precisely it is on when assertions are enabled) -> https://github.com/ktorio/ktor/blob/de742d1adfbbb994bedda198e6739c724e62a974/ktor-utils/jvm/src/io/ktor/util/PlatformUtils.kt#L15-L16
This issue causes our test cases to fail since, in developmentMode, the application is started in a different classloader which leads to some problems with our test setup. We had to override the `io.ktor.development` value to solve it for now.

We believe that this behavior is unintended and a bug. Could you please take a look and provide a better developmentMode resolving method?

This property has strange and hard to document behaviour. Users should not rely on it, but check response status/header/content

Please consider using kotlin.reflect.javaType instead of the type token-like approach in https://github.com/ktorio/ktor/blob/554b8223c5da0fbd0f3ecdd273e74459b8f009e7/ktor-utils/jvm/src/io/ktor/util/reflect/TypeInfoJvm.kt#L17.

The main benefit of using javaType is that it doesn't produce an anonymous class for each call site.

Also, we'd like to get some feedback for javaType before graduating it to stable in a future Kotlin release (we're planning to stabilize typeOf in 1.6 (KT-45396), javaType will likely follow in a subsequent release). That said, currently it doesn't support some corner cases which might be critical for Ktor, which I don't know. Those are listed in the kdoc or the link above.

Another aspect of it is that sometimes there are Kotlin compiler bugs that prevent correct reification of type parameters in anonymous objects (e.g. KT-46797), and typeOf + javaType is supposed to be much more stable in this regard. The compiler bugs still need to be fixed, but if this code uses javaType, at least Ktor users won't suffer from those bugs, like in KT-46797.

• sendWithoutRequest is considered harmful
• no option to update credentials after installation

If you have a common module containing the api for your app, you can't annotate the functions with @Throws(IosHttpRequestException::class), because IosHttpRequestException is defined in the iOS client only and is a subclass from Exception. Adding @Throws(Exception::class) is not a good choice, because a possible wrong request builder is catched too (eg invalide urlString).

class API(val client: HttpClient) {

@Throws(IosHttpRequestException::class) // not possible in commonMain
suspend fun users() = client.get<List<User>>("/users")
}

solution

class API(val client: HttpClient) {

@Throws(IOException::class)
suspend fun users() = client.get<List<User>>("/users")
}

PR: https://github.com/ktorio/ktor/pull/2436

The mailto: URI scheme is standardized in RFC 6068. Such URIs may contain percent-encoded query parameters corresponding to email headers as defined in RFC 5322, such as cc, bcc, subject, and body.

When encoding a mailto: Url using toString, query parameters are ignored, producing only the username and host parts of the URI.

This is important for interoperability with mail clients, which commonly support the additional query parameters by inserting them into a new compose window.

Hello I am working on a project in Ktor. All dependencies of ktor and kotlin are updated and the iOS version does not compile. I do not understand or find a reason why this error could be. Please help

Good day. I am writing a site for watching videos over a local network. Faced a problem, the video does not play on PlayStation 4. On the server, I get the following error:

TRACE Application - 416 Couldn't satisfy range request bytes=25062288-: it should comply with the restriction [0; 25062288): GET - /static/videos/sasha1.mp4.

Screenshots from the reverse proxy attached in the correct sequence.

Please help to figure out the problem.

PS everything works on the computer, it does not work only on playstation 4.

I have random NPEs in selector.coroutineContext[Job]!!.join() when running my unit tests.
The NPEs aren't logged anywhere. I've only noticed them because I've set a breakpoint for NullPointerException.

I haven't been able to make it reproducible yet and I cannot share the project.

https://github.com/ktorio/ktor/blob/dc34eb21a404de321a00d7a07b80808d1c18c400/ktor-client/ktor-client-cio/common/src/io/ktor/client/engine/cio/CIOEngine.kt#L61-L69

selector:

Scenario description

Suppose I use Ktor HttpClient for querying REST API, and kotlinx.serialization for responses deserialization.

REST API which I work with has a class of similar entities - let's call them Categories, with CategoryA, CategoryB, CategoryC being specific instances of that class. REST API provides one and the same endpoint for working with all Categories, and the choice of particular Category is specified in the request parameters by ID

fun HttpClient.getCategoryA(): CategoryA = get() { parameter("category", CategoryA.id) }
fun HttpClient.getCategoryB(): CategoryB = get() { parameter("category", CategoryB.id) }
...

As one can see, the bodies of all such methods are almost duplicated. One of the options to deduplicate them is to use function with generic:

inline fun <reified T : Category> HttpClient.getCategory(): T = get() { parameter("category", /* reflective call to find companion of T and pull `id` from it */) }

Now, having top-level functions in this particular case is bad for encapsulation/testability (in particular, for mocking in tests), so naturally we want to split it into interface + implementation:

interface Service {
    inline fun <reified T : Category> HttpClient.getCategory(): T
}

class ServiceImpl {
    override inline fun <reified T : Category> HttpClient.getCategory(): T = get() { parameter("category", /* reflective call to find companion of T and pull `id` from it */) }
}

Unfortunately, that doesn't work, because it's impossible to have both inline and open at the same time.

Possible solution

What we could do instead?

Assume that reified T in get is needed only to pull typeOf<T>() at some point (I'm actually not sure if that's true, so that might be a weak point of my suggestion :) On the other hand, I think that anything which can be done with reified T should be possible with KType, but that's a different story).

Then, one could use the following trick: make the virtual function non-inline, and pass KType explicitly, then provide an overload with reified T as just a syntactic sugar for clients:

interface Service {
    fun <T : Category> getCategory(client: HttpClient, kTypeOfT: KType): T
}

inline fun <reified T : Category> Service.getCategory(client: HttpClient): T = this.getCategory(client, typeOf<T>())

However, unfortunately, you then can't write an implementation for getCategory, because Ktor has only get with reified T, and you can't call it even if you have KType.

The proposal then is to provide additional overloads, which accept KTypes for HTTP-methods (and maybe other APIs)

When logging response from. Ktor-client Logging feature with the help of ResponseObserver, the log does not contains the MDC context.
This mean when tracking all logs bound to an MDC context, response content log remains untracked.

This test illustrates the mentioned scenario :

in package [jvmTest]io.ktor.client.features.logging, in file LoggingTest.kt

@Test
    fun loggingWithMDCContextTest(): Unit = runBlocking {
        val messages: MutableList<String> = mutableListOf()
        val testLogger: Logger = object : Logger by LoggerFactory.getLogger("ktor.test") {
            override fun trace(message: String?) = add("TRACE: $message")
            override fun debug(message: String?) = add("DEBUG: $message")
            override fun info(message: String?) = add("INFO: $message")

            private fun add(message: String?) {
                if (message != null) {
                    val mdcText = MDC.getCopyOfContextMap()?.let { mdc ->
                        if (mdc.isNotEmpty()) {
                            mdc.entries.sortedBy { it.key }
                                .joinToString(prefix = " [", postfix = "]") { "${it.key}=${it.value}" }
                        } else {
                            ""
                        }
                    } ?: ""

                    messages.add(message + mdcText)
                }
            }
        }

        val localTestLogger: io.ktor.client.features.logging.Logger = object : io.ktor.client.features.logging.Logger  {
            override fun log(message: String) {
                testLogger.info(message)
            }
        }

        val client: HttpClient =  HttpClient {
            install(Logging) {
                level = LogLevel.ALL
                logger = localTestLogger
                // responseCoroutineContext = MDCContext()  This is to provide CoroutineContext from feature config
            }
        }

        MDC.put("trace_id", "48b49e15-f7c4-4991-9e33-23850a218718")

        val response: String = withContext(MDCContext()) {
            client.get("https://jsonplaceholder.typicode.com/todos/1")
        }

        MDC.clear()

        assertNotNull(messages)

        assertNotNull(response)
    }

Theory : First I suspected that this is because of EmptyCoroutineContext being used in launch, but when I gave MDCContext() from kotlinx-coroutines-slf4j to it, it still didn't work. Now I suspect, it is because function is provided as a predicate. However, I am not too sure about it. Can you help please ?

Change I tested :

scope.launch(feature.coroutineContext) {
    try {
        feature.responseHandler(sideCall.response)
    } catch (_: Throwable) {
    }

    val content = sideCall.response.content
    if (!content.isClosedForRead) {
        content.discard()
    }
}

where ResponseObserver = public class ResponseObserver(private val responseHandler: ResponseHandler, private val coroutineContext: CoroutineContext = EmptyCoroutineContext)

Elements of messages :

INFO: REQUEST: https://jsonplaceholder.typicode.com/todos/1 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: METHOD: HttpMethod(value=GET) [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: COMMON HEADERS [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> Accept: */* [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> Accept-Charset: UTF-8 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: CONTENT HEADERS [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> Content-Length: 0 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY Content-Type: null [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY START [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO:  [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY END [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: RESPONSE: 200  [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: METHOD: HttpMethod(value=GET) [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: FROM: https://jsonplaceholder.typicode.com/todos/1 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: COMMON HEADERS [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> access-control-allow-credentials: true [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> age: 5692 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> alt-svc: h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cache-control: max-age=43200 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cf-cache-status: HIT [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cf-ray: 63a05ebc7fdf10f3-CPH [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cf-request-id: 09381989cb000010f38b157000000001 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> content-type: application/json; charset=utf-8 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> date: Sat, 03 Apr 2021 06:51:43 GMT [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> etag: W/"53-hfEnumeNh6YirfjyjaujcOPPT+s" [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> expires: -1 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> nel: {"max_age":604800,"report_to":"cf-nel"} [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> pragma: no-cache [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> report-to: {"group":"cf-nel","endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report?s=39vBUwnOjgmuV0yQJPiunD1hXHE28ku4%2FDq55GSjP%2B66ufTXnkgV1a%2F2H7DHSc28QRc1OiJA6k%2BKKXceS0z%2BaAFzxTU%2FuDpZCeBrgceQ7gvyxUQ45qbyYIa4sg2x"}],"max_age":604800} [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> server: cloudflare [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> set-cookie: __cfduid=dbe3ed123d14f8db7af7d7697a9f4049f1617432703; expires=Mon, 03-May-21 06:51:43 GMT; path=/; domain=.typicode.com; HttpOnly; SameSite=Lax [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> vary: Origin, Accept-Encoding [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> via: 1.1 vegur [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-content-type-options: nosniff [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-powered-by: Express [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-ratelimit-limit: 1000 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-ratelimit-remaining: 999 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-ratelimit-reset: 1616387857 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY Content-Type: application/json; charset=utf-8
INFO: BODY START
INFO: {
  "userId": 1,
  "id": 1,
  "title": "delectus aut autem",
  "completed": false
}
INFO: BODY END

Receiving byte array data by GET request with using ktor-client-curl on native (macosX64) seems to be leaking memory, here's the snippet used to reproduce:

    repeat(1000) {
        runBlocking {
                client.get("http://some-test-image.jpg")
                val responseBody: ByteArray = httpResponse.receive()
        }
    }

Running that code shows constantly increasing memory usage of the process - using quite big images seems to be quickest way to observe it. This seems to be reproducible with 1.5.3, 1.6.0, 1.6.7 as well as with 2.0.0-beta-1 (with introduced API changes into snippet). I actually cherry-picked these versions amongst others and each seems to be affected.

Is there anything I'm assuming wrong here? I would expect heap size to stabilise around some usage instead.

/**
 * Sets a single header of [key] with a specific [value] if the value is not null.
 */
public fun HttpRequestBuilder.header(key: String, value: Any?): Unit =
    value?.let { headers.append(key, it.toString()) } ?: Unit

The KDoc states that the header is set. This word usually signifies that the resulting value will be equal to the parameter, replacing existing value. But since the implementation appends the resulting value might not be what the caller expected.

The KDoc should be more explicit about what the function does. I can imagine even deprecating the current function name in favor of something more descriptive, such as appendHeader instead of just header

ext.kotlin_version = "1.3.72"
ext.ktor_version = "1.5.3"

I'd like to check whether server alive or not at client side.
So, I checked this using pingIntervalMillis, timeoutMillis in Client DefaultWebSocketSession.
But it is not work as my intended.
The session is closed due to ping time out as soon as it start. (There must not happen Ping timeout because Server is alive)
Also, it is happened at only setting client side ping value.
If setting server side ping value, the session is not closed.
If setting both side, the result is same with client.

Here is code.

class MainActivity : AppCompatActivity() {
    private fun startServer() {
        embeddedServer(Netty, port = 8080) {
            install(io.ktor.websocket.WebSockets) {
//                pingPeriod = Duration.ofSeconds(10)
//                timeout = Duration.ofSeconds(5)
            }
            routing {
                webSocket("/language") {
                    try {
                        incoming.consumeEach { frame ->
                            when (frame) {
                                is Frame.Text -> println("######################### ${frame.readText()}")
                            }
                        }
                    } finally {
                        println("######################### ${closeReason.await()}")
                    }
                }
            }
        }.start()
    }

    private val client = HttpClient(CIO) {
        install(io.ktor.client.features.websocket.WebSockets)
    }

    private fun connectLocalhost() {
        CoroutineScope(Dispatchers.IO).launch {
            try {
                client.ws(host = "localhost", port = 8080, path = "/language") {
                    pingIntervalMillis = Duration.ofSeconds(10).toMillis()
                    timeoutMillis = Duration.ofSeconds(5).toMillis()

                    send(Frame.Text("My name is Hello World"))
                    try {
                        incoming.consumeEach { frame ->
                            when (frame) {
                                is Frame.Text -> println(frame.readText())
                            }
                        }
                    } finally {
                        println("------------------------- ${closeReason.await()}")
                    }
                }
            } catch (e:Throwable) {
                println("------------------------- ${e.message}")
            }
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        startServer()
        connectLocalhost()
    }
}

Here is log

I/Adreno: PFP: 0x005ff112, ME: 0x005ff066
I/ConfigStore: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasWideColorDisplay retrieved: 0
I/ConfigStore: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasHDRDisplay retrieved: 0
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 2
I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@7cfdec5 time:17937450
I/System.out: ######################### My name is Hello World
I/System.out: ######################### CloseReason(reason=INTERNAL_ERROR, message=Ping timeout)
I/System.out: ------------------------- CloseReason(reason=INTERNAL_ERROR, message=Ping timeout)

After updating to 1.5.2 Android target doest work. But it is ok for iOS
at 1.4.3 is ok for both platforms iOS and Android.

MockEngine {
  // this code is not called on request as result mock doesn't work
}

*What steps will reproduce the issue?

I think we have a regression of this issue: https://github.com/ktorio/ktor/issues/1358

As we can see the current retry logic continues to use the cached network address: https://github.com/ktorio/ktor/blob/main/ktor-client/ktor-client-cio/common/src/io/ktor/client/engine/cio/Endpoint.kt#L183

1. Use the CIO engine for Ktor Client
2. Connect to an endpoint.
3. Turn off Wifi or cause network issue somehow
4. Try to connect again and get java.nio.channels.UnresolvedAddressException
   5 Turn on Wifi or stop causing network issue
5. Try to connect again and still get java.nio.channels.UnresolvedAddressException.

What is the expected result?

Once network issues are resolved, the client should be able to connect and not keep getting java.nio.channels.UnresolvedAddressException

Other info*

Stack trace log included.

After updating from ktor 1.4.3 to 1.5.2 and running my integration tests using ktor I'm running into:

java.lang.IllegalStateException: No instance for key AttributeKey: ExpectSuccessAttribyteKey
	at io.ktor.util.Attributes$DefaultImpls.get(Attributes.kt:29)
	at io.ktor.util.AttributesJvmBase.get(AttributesJvm.kt:15)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invokeSuspend(DefaultResponseValidation.kt:28)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invoke(DefaultResponseValidation.kt)
	at io.ktor.client.features.HttpCallValidator.validateResponse(HttpCallValidator.kt:55)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invokeSuspend(HttpCallValidator.kt:134)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invoke(HttpCallValidator.kt)
	at io.ktor.client.features.HttpSend$Feature$install$1.invokeSuspend(HttpSend.kt:98)
	at ???(Coroutine boundary.?(?)
	at app.becoach.roboter.CoacheeRoboter$login$1.invokeSuspend(CoacheeRoboter.kt:26)
Caused by: java.lang.IllegalStateException: No instance for key AttributeKey: ExpectSuccessAttribyteKey
	at io.ktor.util.Attributes$DefaultImpls.get(Attributes.kt:29)
	at io.ktor.util.AttributesJvmBase.get(AttributesJvm.kt:15)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invokeSuspend(DefaultResponseValidation.kt:28)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invoke(DefaultResponseValidation.kt)
	at io.ktor.client.features.HttpCallValidator.validateResponse(HttpCallValidator.kt:55)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invokeSuspend(HttpCallValidator.kt:134)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invoke(HttpCallValidator.kt)
	at io.ktor.client.features.HttpSend$Feature$install$1.invokeSuspend(HttpSend.kt:98)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

Do you happen to have any idea what's causing this? My unit tests are getting 4xx error codes from the backend. I've got a custom Feature installed where upon unauthorized error codes, I'm re-issuing a new token.

My feature looks like this:

internal class AuthFeature(
  private val credentials: String,
  private val tokenStorage: TokenStorage,
  private val logger: Logger
) {
  class Config {
    lateinit var credentials: String
    lateinit var tokenStorage: TokenStorage
    lateinit var logger: Logger
  }

  companion object Feature : HttpClientFeature<Config, AuthFeature> {
    override val key: AttributeKey<AuthFeature> = AttributeKey("AuthFeature")

    /**
     * The Mutex is required in order to only refresh once when multiple requests
     * are being triggered simultaneously e.g. at app startup.
     */
    private val mutex = Mutex()

    override fun prepare(block: Config.() -> Unit): AuthFeature {
      val config = Config().apply(block)
      return AuthFeature(
          credentials = config.credentials,
          tokenStorage = config.tokenStorage,
          logger = config.logger,
      )
    }

    @KtorExperimentalAPI
    override fun install(feature: AuthFeature, scope: HttpClient) {
      scope.requestPipeline.intercept(HttpRequestPipeline.State) {
        val accessToken = feature.tokenStorage.getAccessToken()
        val isRefreshingToken = context.url.buildString().endsWith("oauth/token")
        val header = if (accessToken != null && !isRefreshingToken) "Bearer $accessToken" else feature.credentials
        context.headers.append(HttpHeaders.Authorization, header)
      }

      requireNotNull(scope.feature(HttpSend)).intercept { call, _ ->
        if (call.response.status == HttpStatusCode.Unauthorized) {
          val mutexId = uuid4().toString()
          val tag = "${key.name}-$mutexId"
          feature.logger.i(tag, "Got ${HttpStatusCode.Unauthorized.value}")

          val beforeMutexAccessToken = feature.tokenStorage.getAccessToken()
          val request = call.request

          mutex.withLock {
            val inMutexAccessToken = feature.tokenStorage.getAccessToken()
            val needsToRefresh = beforeMutexAccessToken == inMutexAccessToken

            if (needsToRefresh) {
              feature.tokenStorage.putAccessToken(null) // Invalidate access token.
            }

            val refreshToken = feature.tokenStorage.getRefreshToken()

            if (refreshToken != null) {
              if (needsToRefresh) {
                feature.logger.i(tag, "Issuing new access token")
                val refreshResponse = scope.refreshToken(refreshToken)
                feature.logger.i(tag, "Updating access & refresh token")

                feature.tokenStorage.putAccessToken(refreshResponse.accessToken)
                feature.tokenStorage.putRefreshToken(refreshResponse.refreshToken)
              } else {
                feature.logger.i(tag, "Other request already refreshed token")
              }

              // Build previous request once again.
              val requestBuilder = HttpRequestBuilder()
              requestBuilder.takeFrom(request)

              // Force the new token by explicitly setting it.
              requestBuilder.headers[HttpHeaders.Authorization] = "Bearer ${feature.tokenStorage.getAccessToken()}"

              feature.logger.i(tag, "Retrying previous request with new access token")
              execute(requestBuilder).also {
                feature.logger.i(tag, "Finished previous request")
              }
            } else {
              feature.logger.i(tag, "No refresh token and hence leaving as is")
              call
            }
          }
        } else {
          call
        }
      }
    }
  }
}

Test history: https://ktor.beta.teamcity.com/test/451494659026389538?currentProjectId=Ktor_ProjectKtorCore&branch=&orderBy=status&order=desc&expandedTest=id%3A23376%2Cbuild%3A(id%3A24241)

java.net.SocketException: Connection reset by peer
  at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
  at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:715)
  at io.ktor.network.sockets.SocketImpl.connect$ktor_network(SocketImpl.kt:38)
  at io.ktor.network.sockets.SocketImpl$connect$1.invokeSuspend(SocketImpl.kt)
  at    (Coroutine boundary. ( )
  at kotlinx.coroutines.CompletableDeferredImpl.await(CompletableDeferred.kt:86)

I'm using Ktor client with an MPP project.

After upgrading to 1.5.2, I started having this error on a yarn project that is using my js module as a javascript dependency:

./node_modules/mp-game-clib/mp-game-clib.js
Module not found: Can't resolve 'node-fetch' in '/Users/brunomed/git/pok-p2p-game-demo/react-app/node_modules/mp-game-clib'

That's the relevant Gradle config for the library project:

    js(IR) {
        useCommonJs()
        browser {
            binaries.library()
            webpackTask {
                enabled = false
            }
            testTask {
                useKarma {
                    useChromeHeadless()
                    webpackConfig.cssSupport.enabled = true
                }
            }
        }
    }
    ...
    }
    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation(project(":client-server"))
                implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.1.0")

                implementation("io.ktor:ktor-client-core:$ktorVersion")
                implementation("io.ktor:ktor-client-websockets:$ktorVersion")
                implementation("com.benasher44:uuid:0.2.3")

                // https://youtrack.jetbrains.com/issue/KTOR-541
                runtimeOnly(npm("text-encoding", "0.7.0"))
                runtimeOnly(npm("abort-controller", "3.0.0"))
                runtimeOnly(npm("node-fetch", "2.6.1"))                           <== Had to add this to fix the problem for now, I didn't need it with Ktor 1.5.1 
            }
        }
    ...
    }

Not sure if I'm doing something wrong here, but adding those npm dependencies is the only way I could find to produce correct package.json on the jsBrowserProductionLibraryDistribution goal (previous comment here: https://youtrack.jetbrains.com/issue/KTOR-541#focus=Comments-27-4731438.0-0)

Documentation for FormPart says
@param value content, could be [String], [Number] or [Input]
https://github.com/ktorio/ktor/blob/e03bafda3b3d72fcac166e46cf55e5d2d9383660/ktor-client/ktor-client-core/common/src/io/ktor/client/request/forms/formDsl.kt#L17
But later in this file Input is deprecated

   @Suppress("UNUSED_PARAMETER")
    @Deprecated(
        "Input is not reusable. Please use [InputProvider] instead.",
        level = DeprecationLevel.ERROR,
        replaceWith = ReplaceWith("appendInput(key, headers) { /* create fresh input here */ }")
    )
    public fun append(key: String, value: Input, headers: Headers = Headers.Empty) {
        error("Input is not reusable. Please use [InputProvider] instead.")
    }

And direct usage will cause exception

public fun formData(vararg values: FormPart<*>): List<PartData> {
...
    is Input -> error("Can't use [Input] as part of form: $value. Consider using [InputProvider] instead.")
...
}

We're using ktor and stores session data in redis. To avoid problems with the contents of the session we're base64'ing the data before storing it. This results in a one line file, 16kb big. This data is read back using ByteReadChannel, which apparently can not handle such long lines.

Tested on 1.4.21 and 1.4.32.

Test to trigger the exception:

    @Test
    fun decodeSessionData() {
        val fileContent = ByteBufferChannelTest::class.java.getResource("/16kb-on-one-line.txt").readText()
        val channel = ByteReadChannel(fileContent.toByteArray())

        // ktor session storage is using channel.readUTF8Line() to read session data
        runBlocking {
            channel.readUTF8Line()
        }
    }

Stacktrace on 1.4.21:

io.ktor.utils.io.charsets.TooLongLineException: Line is longer than limit
	at io.ktor.utils.io.ByteBufferChannel$readUTF8LineToUtf8Suspend$2.invokeSuspend(ByteBufferChannel.kt:2080)
	at io.ktor.utils.io.ByteBufferChannel$readUTF8LineToUtf8Suspend$2.invoke(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend$suspendImpl(ByteBufferChannel.kt:1825)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineToUtf8Suspend(ByteBufferChannel.kt:2064)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineToAscii(ByteBufferChannel.kt:1999)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineTo$suspendImpl(ByteBufferChannel.kt:2099)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineTo(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8Line$suspendImpl(ByteBufferChannel.kt:2103)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8Line(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteReadChannelKt.readUTF8Line(ByteReadChannel.kt:223)

Stacktrace on 1.4.32:

io.ktor.utils.io.charsets.TooLongLineException: Line is longer than limit
	at io.ktor.utils.io.ByteBufferChannel$readUTF8LineToUtf8Suspend$2.invokeSuspend(ByteBufferChannel.kt:2094)
	at io.ktor.utils.io.ByteBufferChannel$readUTF8LineToUtf8Suspend$2.invoke(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend$suspendImpl(ByteBufferChannel.kt:1827)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineToUtf8Suspend(ByteBufferChannel.kt:2076)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineToAscii(ByteBufferChannel.kt:2011)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineTo$suspendImpl(ByteBufferChannel.kt:2113)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8LineTo(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8Line$suspendImpl(ByteBufferChannel.kt:2117)
	at io.ktor.utils.io.ByteBufferChannel.readUTF8Line(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteReadChannelKt.readUTF8Line(ByteReadChannel.kt:223)

Use the stdlib require function instead of io.ktor.utils.io.core.internal.require, with has the same signature.

Reproducer:

suspend fun main() {
    val channel = ByteChannel(true)

    println(channel.availableForRead) //prints 0
    channel.writePacket {
        writeText("hello")
    }
    println(channel.availableForRead) //prints 5
    val packet = channel.readRemaining(channel.availableForRead.toLong()) //suspend...
//    val packet = channel.readPacket(channel.availableForRead)
    println(packet.readText())
}

Channel has 5 bytes available for read.
Contract of availableForRead says, that:

    /**
     * Returns number of bytes that can be read without suspension. Read operations do no suspend and return
     * immediately when this number is at least the number of bytes requested for read.
     */
    public actual val availableForRead: Int

But in readRemaining it suspends on trying to read...
Using readPacket it works ok.

Using ByteChannelSequential on JVM don't suspend on both calls. On K/N the same - both don't suspends.

Looks like it regression after KTOR-1268. Caused by this change: https://github.com/ktorio/ktor/pull/2214/files#diff-408be3eaf4a8ec196449c0483c1525a24450590d9473ebcc3a5bc3798326e3e7L2234-R2222
Now channel is trying to read one byte, even if it's not needed.

Reproduced on:
kotlin: 1.4.32
ktor: 1.5.3

Minimal reproducer:
on K/N:

fun main() = runBlocking {
    val channel = ByteChannel(true)
    channel.writePacket {
        writeText("h")
    }
    channel.close()
    val packet = withTimeoutOrNull(1000) {
        //    val packet = channel.readRemaining(5L)
        channel.readPacket(5)
    }
    println(packet?.readText())
}

Channel closed, but readPacket freezes forever - even not fail by timeout.
Same behavior is if using ByteChannelSequentialJVM(IoBuffer.Empty, true) on K/JVM.
If using ByteBufferChannel on JVM - behavior is ok, exception is thrown:

Exception in thread "main" kotlinx.coroutines.channels.ClosedReceiveChannelException: Unexpected EOF: expected 4 more bytes
	at io.ktor.utils.io.ByteBufferChannel.readFullySuspend(ByteBufferChannel.kt:598)
	at io.ktor.utils.io.ByteBufferChannel.readFully(ByteBufferChannel.kt:590)
	at io.ktor.utils.io.ByteBufferChannel.readPacketSuspend(ByteBufferChannel.kt:806)
	at io.ktor.utils.io.ByteBufferChannel.readPacket$suspendImpl(ByteBufferChannel.kt:792)
	at io.ktor.utils.io.ByteBufferChannel.readPacket(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteReadChannelKt.readPacket(ByteReadChannel.kt:202)
	at AppKt$main$1$packet$1.invokeSuspend(App.kt:57)

If to use readRemaining - for any channel, behavior is the same, it reads packet with one letter and prints it.

@OptIn(InternalAPI::class)
suspend fun main() {
    val connection = aSocket(SelectorManager()).tcp().bind(port = 8000).accept().connection()
    while (true) {
        delay(1000)
        connection.output.writePacket(buildPacket {
            writeText("1".repeat(128))
        })
        connection.output.flush()
    }
}

@OptIn(InternalAPI::class)
fun main() = runBlocking {
    val connection = aSocket(SelectorManager()).tcp().connect("0.0.0.0", port = 8000).connection()
    while (true) {
        val packet = withTimeoutOrNull(5000) {
            println("await")
            val packet = connection.input.readRemaining(128)
//            val packet = connection.input.readPacket(128)
            require(packet.remaining == 128L) { "Length should be 128 but was ${packet.remaining}" }
            packet
        }
        println("received: ${packet?.readText()}")
    }
}

await
received: 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
await
received: 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

Uncaught Kotlin exception: kotlin.IllegalArgumentException: Length should be 128 but was 0

Exception in thread "main" java.lang.IllegalArgumentException: Length should be 128 but was 0

Exception in thread "main" kotlinx.coroutines.channels.ClosedReceiveChannelException: Unexpected EOF: expected 128 more bytes
	at io.ktor.utils.io.ByteBufferChannel.readFullySuspend(ByteBufferChannel.kt:598)
	at io.ktor.utils.io.ByteBufferChannel$readFullySuspend$1.invokeSuspend(ByteBufferChannel.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:277)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:86)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:61)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at AppKt.main(App.kt:24)
	at AppKt.main(App.kt)

Reproduced on:
kotlin: 1.4.32
ktor: 1.5.3
os: macos
K/N target: macos, both release and debug

Prior ktor 1.5.3 it was possible to replace pool of created ByteReadPacket by using something like this:

inline fun buildPacket(pool: ObjectPool<ChunkBuffer>, block: BytePacketBuilder.() -> Unit): ByteReadPacket {
    val builder = BytePacketBuilder(0, pool)
    try {
        block(builder)
        return builder.build()
    } catch (t: Throwable) {
        builder.release()
        throw t
    }
}

and then, use such pool that will intercept calls to default ChunkBuffer.Pool that is used for underlying storage:

object InUseTrackingPool : ObjectPool<ChunkBuffer> {
    override val capacity: Int get() = ChunkBuffer.Pool.capacity
    private val inUse = atomic(0)

    override fun borrow(): ChunkBuffer {
        inUse.incrementAndGet()
        return ChunkBuffer.Pool.borrow()
    }

    override fun recycle(instance: ChunkBuffer) {
        inUse.decrementAndGet()
        ChunkBuffer.Pool.recycle(instance)
    }

    override fun dispose() {
        ChunkBuffer.Pool.dispose()
    }

    fun resetInUse() {
        inUse.lazySet(0)
    }
    fun assertNoInUse() {
        val v = inUse.value
        assertEquals(0, v, "Buffers in use")
    }
}

But after fix for KTOR-960, now ChunkBuffers are linked to parentPool in which they were created, and so, borrow interception works, but recycle will be never called, as ChunkBuffer.Pool.recycle will be called directly.

Even now it's possible to do something like this but using internal APIs like here: https://github.com/rsocket/rsocket-kotlin/blob/06ce789c6aeaf499f1dd43cdcf1c78e1b3825881/rsocket-test/src/commonMain/kotlin/io/rsocket/kotlin/test/InUseTrackingPool.kt - very very hacky.

The question is: Is it possible to have ability to track leaked buffers in another way? Or can you provide some easier (non-internal) way to create own Buffer Pools, or some other API

The function channel.readRemaining sometimes returns a packet (possibly the empty one) when the channel is closed abnormally.

Changelog https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.4.3

Hey,

I think there is an unnecessary restriction on the RouteSelector that limits TrailingSlashRouteSelector as an internal object. I know that RouteSelection is an internal API, but it is very useful for route analysis, for instance I am starting to build out an OpenAPI spec generator, and would like to construct a route from the final route declaration, so something like this

@OptIn(InternalAPI::class)
  fun Route.calculatePath(tail: String = ""): String = when (selector) {
    is RootRouteSelector -> tail
    is PathSegmentParameterRouteSelector -> parent?.calculatePath("/$selector$tail") ?: "/{$selector}$tail"
    is PathSegmentConstantRouteSelector -> parent?.calculatePath("/$selector$tail") ?: "/$selector$tail"
    else -> error("unknown selector type $selector")
  }

However, I am running into a limitation placed seemingly only on TrailingSlashRouteSelector, which is declared internal object. Are there any concerns around making this publicly available?

If so, what would be a proposed alternative for building out route patterns at runtime?

After reading the docutmentation on using Mustache with Ktor as seen here https://ktor.io/docs/mustache.html . I checked again and it appears that this extends to any time the install() function is called.

Site.kt

 package xyz.qixt
 // General deps
 import io.ktor.server.engine.*
 import io.ktor.server.netty.*
 import io.ktor.application.*
 import io.ktor.features.*
 import io.ktor.response.*
 import io.ktor.routing.*
 // Frontend imports
 import com.github.mustachejava.*
 import io.ktor.mustache.*
 
@Suppress("unused") // Referenced in application.conf
@kotlin.jvm.JvmOverloads

fun main(args: Array<String>) {
     embeddedServer(Netty, port = 8080){}.start()
}
fun Application.pages() {
   install(Mustache) {
         MustacheFactory = DefaultMustacheFactory("views/mustache")
   }
   routing {
         get ("/"){
             val CurrentUser = User("Will")
             call.respond(MustacheContent("index.hbs", mapOf("user" to CurrentUser)))
         }
     }
  }
data class User(val name: String)

build.gradle.kts

import org.jetbrains.kotlin.gradle.dsl.Coroutines
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

val logback_version: String by project
val ktor_version: String by project
val kotlin_version: String by project

plugins {
    application
    kotlin("jvm") version "1.4.30"
}

group = "xyz.qixt"
version = "0.0.1-SNAPSHOT"

application {
    //mainClassName = "io.ktor.server.netty.EngineMain"
    mainClassName = "xyz.qixt.SiteKt"
}

repositories {
    mavenLocal()
    jcenter()
    maven { url = uri("https://kotlin.bintray.com/ktor") }
    maven { url = uri("https://kotlin.bintray.com/kotlin-js-wrappers") }
}

dependencies {
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version")
    implementation("io.ktor:ktor-server-netty:$ktor_version")
    implementation("ch.qos.logback:logback-classic:$logback_version")
    implementation("io.ktor:ktor-server-core:$ktor_version")
    implementation("io.ktor:ktor-html-builder:$ktor_version")
    implementation("org.jetbrains:kotlin-css-jvm:1.0.0-pre.31-kotlin-1.2.41")
    implementation("io.ktor:ktor-mustache:$ktor_version")
    implementation("io.ktor:ktor-server-host-common:$ktor_version")
    testImplementation("io.ktor:ktor-server-tests:$ktor_version")
}

kotlin.sourceSets["main"].kotlin.srcDirs("src")
kotlin.sourceSets["test"].kotlin.srcDirs("test")

sourceSets["main"].resources.srcDirs("resources")
sourceSets["test"].resources.srcDirs("resources")

output/error

src/Site.kt: (28, 5): Not enough information to infer type variable B
src/Site.kt: (28, 13): Unresolved reference: Mustache
src/Site.kt: (29, 9): Variable expected

A user gets the unresolved reference "call.receiveText" error when trying to use examples from https://ktor.io/docs/requests.html

There are reports that the tutorial located at https://play.kotlinlang.org/hands-on/Creating HTTP APIs with Ktor/02_application-init does not work well with the latest version of the Ktor plugin. We recently ported this tutorial over to our docs. Please make sure it is all correct.

Right now the page https://ktor.io/clients/http-client/features/auth.html is redirected to https://ktor.io/docs/http-client-features.html but should be redirected to https://ktor.io/docs/features-auth.html instead.

The first link from the comment https://github.com/ktorio/ktor/issues/507#issuecomment-410173950 gives a 404 page.

Most contain bintray and jcenter repositories. They need to be removed.

Some snippets have 4 spaces and some 2

https://ktor.io/docs/serving-static-content.html#serving-individual-files

To reproduce create a new project via the IDEA plugin without any feature and run generated application using Maven:

mvn exec:java

As a result, the app crashes with the following error:

 An exception occured while executing the Java class. com.example.ApplicationKt
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:77)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:568)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. com.example.ApplicationKt
    at org.codehaus.mojo.exec.ExecJavaMojo.execute (ExecJavaMojo.java:352)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:77)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:568)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.lang.ClassNotFoundException: com.example.ApplicationKt
    at java.net.URLClassLoader.findClass (URLClassLoader.java:445)
    at java.lang.ClassLoader.loadClass (ClassLoader.java:587)
    at java.lang.ClassLoader.loadClass (ClassLoader.java:520)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run (ExecJavaMojo.java:285)
    at java.lang.Thread.run (Thread.java:833)

Including Kotlinx HTML DSL as the templating language results in the following line in the configuration:

maven { url = uri("https://maven.pkg.jetbrains.space/public/p/kotlinx-html/maven") }

Since kotlinx-html-jvm:0.7.3 is already published on mavenCentral, there is no need for this line anymore going forward, and it can be removed. (Relates to KTOR-2203, which can be closed, I suppose.)

To reproduce create a project with all features selected and the the following properties:

• Build system: Maven
• Ktor version 1.4.0
• Engine: Tomcat
• Configuration: HOCON file

After project generation, sync fails with the following error:

Could not find artifact org.jetbrains.kotlinx:kotlinx-html-jvm:pom:0.7.2 in kotlinx-html (https://maven.pkg.jetbrains.space/public/p/kotlinx-html/maven)

Also, build fails with an unresolved reference error:

/home/stexe/projects/ktor_plugin/ktor-sample7/src/main/kotlin/com/example/plugins/Sockets.kt:11:24
Kotlin: Unresolved reference: tls

IntelliJ IDEA 2021.1 with Ktor plugin 1.5.3

1. New Project - Ktor
2. Add Feature - Thymeleaf
3. Open Templating.kt file

Actual result: templates/thymeleaf/ is mentioned in code but there is no such directory and index file in project

fun Application.configureTemplating() {
    install(Thymeleaf) {
        setTemplateResolver(ClassLoaderTemplateResolver().apply {
            prefix = "templates/thymeleaf/"
            suffix = ".html"
            characterEncoding = "utf-8"
        })
    }

    routing {
        get("/html-thymeleaf") {
            call.respond(ThymeleafContent("index", mapOf("user" to ThymeleafUser(1, "user1"))))
        }
    }
}

To reproduce create a new project via the IDEA plugin without any feature and run generated application using Gradle:

./gradlew run

As a result the app crashes with the following error:

> Task :run FAILED
2021-04-08 16:20:57.086 [main] TRACE Application - No configuration provided: neither application.conf nor system properties nor command line options (-config or -P:ktor...=) provided
Exception in thread "main" java.lang.IllegalArgumentException: Neither port nor sslPort specified. Use command line options -port/-sslPort or configure connectors in application.conf
	at io.ktor.server.engine.CommandLineKt$commandLineEnvironment$environment$1.invoke(CommandLine.kt:142)
	at io.ktor.server.engine.CommandLineKt$commandLineEnvironment$environment$1.invoke(CommandLine.kt)
	at io.ktor.server.engine.ApplicationEngineEnvironmentBuilder.build(ApplicationEngineEnvironment.kt:110)
	at io.ktor.server.engine.ApplicationEngineEnvironmentKt.applicationEngineEnvironment(ApplicationEngineEnvironment.kt:46)
	at io.ktor.server.engine.CommandLineKt.commandLineEnvironment(CommandLine.kt:61)
	at io.ktor.server.netty.EngineMain.main(EngineMain.kt:21)

Should be: Gradle Kotlin, Gradle Groovy, Maven

The wizard generates a new app that compiles and runs, but when clicking on the default route as indicated by the output, it doesn't respond. I think we should provide a default route not only as means of folks knowing that it works, but also as a starting point.

Wizard is still referencing Bintray and jcenter which aren't required.

repositories {
    mavenLocal()
    jcenter()
    maven { url = uri("https://kotlin.bintray.com/ktor") }
}

To reproduce the issue, create a new Ktor project with the Maven build system. The pom.xml file will contain the following code for the exec-maven-plugin plugin:

                <configuration>
                    <mainClass>io.ktor.server.netty.DevelopmentEngine</mainClass>
                </configuration>

But DevelopmentEngine is deprecated.

I want to build Ktor locally for iOS.
If I open Ktor using IntelliJ and click on Gradle publishToMavenLocal, the iOS sources won't be created, because the special handling in darwin.gradle

if (project.ext.ideaActive) {
  fromPreset(project.ext.ideaPreset, 'darwin')
} else {
  fromPreset(presets.iosArm64, 'iosArm64')
  fromPreset(presets.iosArm32, 'iosArm32')
  fromPreset(presets.iosX64, 'iosX64')
...

To build the iOS sources, you need to exit IntelliJ and run ./gradlew publishToMavenLocal in your terminal. Otherwise you will get a No matching variant of io.ktor:ktor-client-ios:1.6.0-SNAPSHOT was found. error in the consuming project.

Depending on the IDE to create different artifacts of the same Gradle task is very confusing and takes some time to understand...

The 1.5.x update broke the auto-reload feature.
I made an example repo here, when switching from 1.4.x to 1.5.x the auto-reload break (not working anymore).
You can reproduce by running ./gradlew run and ./gradlew build -t and switch versions.

Generating a project with the kotlinx HTML DSL for templating creates the following entries in the build file:

implementation("org.jetbrains.kotlinx:kotlinx-html-jvm:0.7.3")
implementation("io.ktor:ktor-html-builder:$ktor_version")

ktor-html-builder already includes the dependency on kotlinx-html-jvm, so I it does not seem necessary to duplicate this declaration in the build file:

$ ./gradlew -q dependencies
...
+--- io.ktor:ktor-html-builder:1.5.3
|    +--- org.jetbrains.kotlin:kotlin-stdlib:1.4.32 (*)
|    +--- org.slf4j:slf4j-api:1.7.30
|    +--- org.jetbrains.kotlinx:kotlinx-html-jvm:0.7.3 (*)
|    \--- io.ktor:ktor-server-core-kotlinMultiplatform:1.5.3 (*)

Tip for the website field says that:

Domain is used to determine the package name

but the package name is present only under the Artifact field and that is misleading.

An endpoint without any route at all looks a bit empty. How about a / instead?

User feedback:

After installing Intellij IDEA 2021.1 (on Linux Mint 20.1 with all updates installed) I was having a lot of problems working in a simple Ktor/Gradle project, newly created. I could build in gradle and run the application but in the IDE the editor was showing errors where there were none. Go to definition and other code navigation features weren't working. I got an error saying "Kotlin not enabled" but the plugin was installed and enabled. Eventually the IDE would lock up completely and I'd have to kill the process manually.

I tried uninstalling and reinstalling, removing all folders in places like .local where files were stored before reinstalling. I tried installing using JB toolbox and then removing that as well and installing from a .tar.gz file.

Finally I just removed it all and installed 2020.3, and it's working, but doesn't have some of the new features like Code With Me that I wanted to try.

IDEA 2021.1.1 Preview Build #IU-211.7142.13
Kotlin (211-1.4.32-release-IJ7142.3)
Ktor version: 1.5.3

2021-04-22 09:09:59,895 [  34465]  ERROR - mpl.search.PsiSearchHelperImpl - IntelliJ IDEA 2021.1.1 Preview  Build #IU-211.7142.13 
2021-04-22 09:09:59,895 [  34465]  ERROR - mpl.search.PsiSearchHelperImpl - JDK: 11.0.10; VM: Dynamic Code Evolution 64-Bit Server VM; Vendor: JetBrains s.r.o. 
2021-04-22 09:09:59,895 [  34465]  ERROR - mpl.search.PsiSearchHelperImpl - OS: Linux 
2021-04-22 09:09:59,895 [  34465]  ERROR - mpl.search.PsiSearchHelperImpl - Plugin to blame: Ktor version: 1.5.3 
2021-04-22 09:09:59,895 [  34465]  ERROR - mpl.search.PsiSearchHelperImpl - Last Action: About 
2021-04-22 09:09:59,895 [  34465]  ERROR - aemon.impl.PassExecutorService - null 
java.lang.StackOverflowError
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.openapi.progress.util.ProgressWrapper.setText(ProgressWrapper.java:105)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processGlobalRequests(PsiSearchHelperImpl.java:837)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processGlobalRequestsOptimized(PsiSearchHelperImpl.java:830)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processRequests(PsiSearchHelperImpl.java:755)
	at com.intellij.psi.search.SearchRequestQuery.processResults(SearchRequestQuery.java:24)
	at com.intellij.util.AbstractQuery.doProcessResults(AbstractQuery.java:91)
	at com.intellij.util.AbstractQuery.delegateProcessResults(AbstractQuery.java:108)
	at com.intellij.util.MergeQuery.processResults(MergeQuery.java:22)
	at com.intellij.util.AbstractQuery.doProcessResults(AbstractQuery.java:91)
	at com.intellij.util.AbstractQuery.delegateProcessResults(AbstractQuery.java:108)
	at com.intellij.util.UniqueResultsQuery.processResults(UniqueResultsQuery.java:39)
	at com.intellij.util.AbstractQuery.doProcessResults(AbstractQuery.java:91)
	at com.intellij.util.AbstractQuery.forEach(AbstractQuery.java:83)
	at com.intellij.util.AbstractQuery.findAll(AbstractQuery.java:28)
	at com.intellij.util.Query.iterator(Query.java:129)
	at com.intellij.util.AbstractQuery.iterator(AbstractQuery.java:39)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths(KtorUrlReferenceContributor.kt:370)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths$default(KtorUrlReferenceContributor.kt:120)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths(KtorUrlReferenceContributor.kt:191)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths$default(KtorUrlReferenceContributor.kt:120)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.calculateUrlPathContext(KtorUrlReferenceContributor.kt:85)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1$injector$1.invoke(KtorUrlReferenceContributor.kt:232)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1$injector$1.invoke(KtorUrlReferenceContributor.kt:22)
	at com.intellij.microservices.url.references.UrlPathReferenceInjector$buildReferences$1.rootContext(UrlPathReferenceInjector.kt:128)
	at com.intellij.microservices.url.references.UrlPathReferenceInjector$buildReferences$1.forPsiElement(UrlPathReferenceInjector.kt:136)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1.invoke(KtorUrlReferenceContributor.kt:238)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1.invoke(KtorUrlReferenceContributor.kt:22)
	at com.intellij.psi.UastReferenceRegistrar$uastReferenceProvider$1.getReferencesByElement(UastReferenceRegistrar.kt:54)
	at com.intellij.psi.UastReferenceProviderAdapter$getReferencesByElement$1.invoke(UastReferenceProviderAdapter.kt:13)
	at com.intellij.psi.UastReferenceProviderAdapter$getReferencesByElement$1.invoke(UastReferenceProviderAdapter.kt:8)
	at com.intellij.openapi.progress.impl.CancellationCheck.withCancellationCheck(CancellationCheck.kt:59)
	at com.intellij.openapi.progress.impl.CancellationCheck$Companion.runWithCancellationCheck(CancellationCheck.kt:105)
	at com.intellij.psi.UastReferenceProviderAdapter.getReferencesByElement(UastReferenceProviderAdapter.kt:13)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.getReferences(ReferenceProvidersRegistryImpl.java:201)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.mapNotEmptyReferencesFromProviders(ReferenceProvidersRegistryImpl.java:164)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.doGetReferencesFromProviders(ReferenceProvidersRegistryImpl.java:143)
	at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry.getReferencesFromProviders(ReferenceProvidersRegistry.java:43)
	at com.intellij.psi.PsiReferenceServiceImpl.doGetReferences(PsiReferenceServiceImpl.java:34)
	at com.intellij.psi.PsiReferenceServiceImpl.getReferences(PsiReferenceServiceImpl.java:26)
	at com.intellij.psi.search.SingleTargetRequestResultProcessor.processTextOccurrence(SingleTargetRequestResultProcessor.java:32)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl$5.lambda$execute$0(PsiSearchHelperImpl.java:942)
	at com.intellij.psi.impl.search.LowLevelSearchUtil.processTreeUp(LowLevelSearchUtil.java:88)
	at com.intellij.psi.impl.search.LowLevelSearchUtil.lambda$processElementsAtOffsets$0(LowLevelSearchUtil.java:179)
	at com.intellij.psi.impl.search.LowLevelSearchUtil.processOffsets(LowLevelSearchUtil.java:205)
	at com.intellij.psi.impl.search.LowLevelSearchUtil.processElementsAtOffsets(LowLevelSearchUtil.java:178)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl$5.execute(PsiSearchHelperImpl.java:938)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl$2.processInReadAction(PsiSearchHelperImpl.java:272)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl$2.processInReadAction(PsiSearchHelperImpl.java:263)
	at com.intellij.openapi.application.ReadActionProcessor.lambda$process$0(ReadActionProcessor.java:25)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:844)
	at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:61)
	at com.intellij.openapi.application.ReadActionProcessor.process(ReadActionProcessor.java:25)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.lambda$processCandidates$17(PsiSearchHelperImpl.java:899)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.lambda$processVirtualFile$10(PsiSearchHelperImpl.java:535)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1091)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processVirtualFile(PsiSearchHelperImpl.java:515)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.lambda$processPsiFileRoots$7(PsiSearchHelperImpl.java:392)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.lambda$processFilesConcurrentlyDespiteWriteActions$8(PsiSearchHelperImpl.java:465)
	at com.intellij.openapi.application.impl.ReadMostlyRWLock.executeByImpatientReader(ReadMostlyRWLock.java:167)
	at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:178)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.lambda$processFilesConcurrentlyDespiteWriteActions$9(PsiSearchHelperImpl.java:464)
	at com.intellij.concurrency.JobLauncherImpl.lambda$processImmediatelyIfTooFew$2(JobLauncherImpl.java:142)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:688)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:634)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:64)
	at com.intellij.concurrency.JobLauncherImpl.lambda$processImmediatelyIfTooFew$3(JobLauncherImpl.java:138)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:814)
	at com.intellij.concurrency.JobLauncherImpl.processImmediatelyIfTooFew(JobLauncherImpl.java:149)
	at com.intellij.concurrency.JobLauncherImpl.invokeConcurrentlyUnderProgress(JobLauncherImpl.java:45)
	at com.intellij.concurrency.JobLauncher.invokeConcurrentlyUnderProgress(JobLauncher.java:49)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processFilesConcurrentlyDespiteWriteActions(PsiSearchHelperImpl.java:481)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processPsiFileRoots(PsiSearchHelperImpl.java:389)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processCandidates(PsiSearchHelperImpl.java:894)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processGlobalRequests(PsiSearchHelperImpl.java:864)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processGlobalRequestsOptimized(PsiSearchHelperImpl.java:830)
	at com.intellij.psi.impl.search.PsiSearchHelperImpl.processRequests(PsiSearchHelperImpl.java:755)
	at com.intellij.psi.search.SearchRequestQuery.processResults(SearchRequestQuery.java:24)
	at com.intellij.util.AbstractQuery.doProcessResults(AbstractQuery.java:91)
	at com.intellij.util.AbstractQuery.delegateProcessResults(AbstractQuery.java:108)
	at com.intellij.util.MergeQuery.processResults(MergeQuery.java:22)
	at com.intellij.util.AbstractQuery.doProcessResults(AbstractQuery.java:91)
	at com.intellij.util.AbstractQuery.delegateProcessResults(AbstractQuery.java:108)
	at com.intellij.util.UniqueResultsQuery.processResults(UniqueResultsQuery.java:39)
	at com.intellij.util.AbstractQuery.doProcessResults(AbstractQuery.java:91)
	at com.intellij.util.AbstractQuery.forEach(AbstractQuery.java:83)
	at com.intellij.util.AbstractQuery.findAll(AbstractQuery.java:28)
	at com.intellij.util.Query.iterator(Query.java:129)
	at com.intellij.util.AbstractQuery.iterator(AbstractQuery.java:39)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths(KtorUrlReferenceContributor.kt:370)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths$default(KtorUrlReferenceContributor.kt:120)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths(KtorUrlReferenceContributor.kt:191)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.getParentUrlPaths$default(KtorUrlReferenceContributor.kt:120)
	at io.ktor.ide.KtorUrlReferenceContributor$Companion.calculateUrlPathContext(KtorUrlReferenceContributor.kt:85)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1$injector$1.invoke(KtorUrlReferenceContributor.kt:232)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1$injector$1.invoke(KtorUrlReferenceContributor.kt:22)
	at com.intellij.microservices.url.references.UrlPathReferenceInjector$buildReferences$1.rootContext(UrlPathReferenceInjector.kt:128)
	at com.intellij.microservices.url.references.UrlPathReferenceInjector$buildReferences$1.forPsiElement(UrlPathReferenceInjector.kt:136)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1.invoke(KtorUrlReferenceContributor.kt:238)
	at io.ktor.ide.KtorUrlReferenceContributor$registerServerReferenceProvider$1.invoke(KtorUrlReferenceContributor.kt:22)
	at com.intellij.psi.UastReferenceRegistrar$uastReferenceProvider$1.getReferencesByElement(UastReferenceRegistrar.kt:54)
[...]

For example, when I'm trying to find the HTML DSL feature, the wizard shows template engines first.

The code generated:

fun Application.configureRouting() {
    
}

Even without sample code, it's probably preferable to at least generate the following stub:

fun Application.configureRouting() {
    routing {
        
    }
}

When selecting the CIO option in the Project Wizard, it uses "Netty" as parameter to the embeddedServer function as opposed to CIO.

If we're linking to the specific code for a feature on GitHub (which should probably be indicated in the metadata for the feature and only linked if present), it should link to the specific feature. Currently all the ones we ship out of the box point to generic https://github.com/ktorio/ktor

Also, please note the text should say

"Source on GitHub" instead of "See features's GitHub"

Could not find artifact org.jetbrains.kotlin:kotlin-maven-serialization:pom:${kotlin.version} in central (https://repo.maven.apache.org/maven2)

I assume this is the offending block:

<dependency>
    <groupId>org.jetbrains.kotlin</groupId>
    <artifactId>kotlin-maven-serialization</artifactId>
    <version>${kotlin.version}</version>
</dependency>

With a barebones Ktor project as generated by the Wizard, the stubbed-out code snippets in the README.md cause IntelliJ to believe we're committing very faulty software when importing our project into Git (and, likely, other VCS). IJ shows 50+ errors (not warnings).

This looks very scary, and makes it feel like something is broken with the setup even when there isn't. Please either annotate the README with some kind of flag to let IntelliJ know not to check all the code fences, or otherwise exclude the README file from code analysis.

Tested on:

IntelliJ IDEA 2021.1 Beta (Ultimate Edition)
Build #IU-211.6305.21, built on March 4, 2021
IntelliJ IDEA EAP User
Expiration date: April 4, 2021
Runtime version: 11.0.10+9-b1341.18 x86_64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
macOS 10.14.6
GC: G1 Young Generation, G1 Old Generation
Memory: 4096M
Cores: 8
Registry: ide.images.show.chessboard=true
Non-Bundled Plugins: com.jetbrains.darkPurpleTheme (1.2), org.nik.presentation-assistant (1.0.9), wu.seal.tool.jsontokotlin (3.6.1), org.asciidoctor.intellij.asciidoc (0.32.26), stardust (1.5.2105), com.jetbrains.intellij.api.watcher (6.46.0), intellij.ktor (1.5.1-eap-1)
Kotlin: 211-1.4.21-release-IJ6305.1

The feature generates the following code in resources/static/index.html:

<html>
<head>
</head>
<body>
<h1>Hello Ktor!<h1>
</body>
</html>

As IntelliJ IDEA notes correctly, the h1 tag is not being closed properly. Should be </h1>.

plugins {
    id 'application'
    id 'org.jetbrains.kotlin.jvm' version '1.4.10'
    id "org.jetbrains.kotlin.plugin.serialization" version "1.4.10" // <== these should probably also be single quotes – no need to switch.
}

import org.jetbrains.kotlin.gradle.dsl.Coroutines
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

Environment details:
IntelliJ IDEA 2021.1 (Ultimate Edition)
Build #IU-211.6693.111, built on April 6, 2021
Runtime version: 11.0.10+9-b1341.35 aarch64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
macOS 11.2.3
GC: G1 Young Generation, G1 Old Generation
Memory: 2048M
Cores: 8
Non-Bundled Plugins: mobi.hsz.idea.gitignore (4.1.0), com.github.beansoft.reatnative.idea.free (2020.2), intellij.ktor (1.5.3), Dart (211.7179), io.flutter (55.1.5), com.jetbrains.php (211.6693.120), org.jetbrains.plugins.go (211.6693.111)
Kotlin: 211-1.4.32-release-IJ6693.72

KTOR - 1.5.3

Created new project from KTor wizard.
Added

• Authentication JWT - this is adding automatically "Routing" & "Authentication"
• Authentication OAuth - this is adding automatically "Locations"
• Status Pages
• Compression
• CORS
• CallLogging
• Metrics
• Kotlinx.serialization - this is adding automatically "ContentNegotiation"
• RawSockets

Result :

At compilation stage :
Exception in thread "main" io.ktor.application.DuplicateApplicationFeatureException: Conflicting application feature is already installed with the same key as "Locations"

Removing :

    install(Locations) {
    }

from Routing.kt

creates error :
Exception in thread "main" io.ktor.application.MissingApplicationFeatureException: Application feature Locations is not installed

The sample code says:

        // Static feature. Try to access `/static/ktor_logo.svg`

...but no ktor_logo.svg is included.

IJ 212 Nightly

1. Open New Project wizard
2. Select Ktor
3. Close New Project wizard

2021-04-30 10:44:27,515 [ 181985]  ERROR - tellij.openapi.util.ObjectTree - Memory leak detected: 'io.ktor.initializr.intellij.features.KtorFeaturesStep' of class io.ktor.initializr.intellij.features.KtorFeaturesStep is registered in Disposer but wasn't disposed.
Register it with a proper parentDisposable or ensure that it's always disposed by direct Disposer.dispose call.
See https://jetbrains.org/intellij/sdk/docs/basics/disposers.html for more details.
The corresponding Disposer.register() stacktrace is shown as the cause:
 
java.lang.RuntimeException: Memory leak detected: 'io.ktor.initializr.intellij.features.KtorFeaturesStep' of class io.ktor.initializr.intellij.features.KtorFeaturesStep is registered in Disposer but wasn't disposed.
Register it with a proper parentDisposable or ensure that it's always disposed by direct Disposer.dispose call.
See https://jetbrains.org/intellij/sdk/docs/basics/disposers.html for more details.
The corresponding Disposer.register() stacktrace is shown as the cause:

	at com.intellij.openapi.util.ObjectTree.assertIsEmpty(ObjectTree.java:227)
	at com.intellij.openapi.util.Disposer.assertIsEmpty(Disposer.java:167)
	at com.intellij.openapi.util.Disposer.assertIsEmpty(Disposer.java:162)
	at com.intellij.openapi.application.impl.ApplicationImpl.disposeContainer(ApplicationImpl.java:246)
	at com.intellij.openapi.application.impl.ApplicationImpl.disposeSelf(ApplicationImpl.java:263)
	at com.intellij.openapi.application.impl.ApplicationImpl.doExit(ApplicationImpl.java:650)
	at com.intellij.openapi.application.impl.ApplicationImpl.exit(ApplicationImpl.java:603)
	at com.intellij.openapi.application.impl.ApplicationImpl.exit(ApplicationImpl.java:592)
	at com.intellij.openapi.application.ex.ApplicationEx.exit(ApplicationEx.java:73)
	at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeFrame$3.windowClosing(WelcomeFrame.java:117)
	at java.desktop/java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:357)
	at java.desktop/java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:357)
	at java.desktop/java.awt.Window.processWindowEvent(Window.java:2090)
	at java.desktop/javax.swing.JFrame.processWindowEvent(JFrame.java:298)
	at java.desktop/java.awt.Window.processEvent(Window.java:2049)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2784)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:896)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:768)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:434)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:825)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:433)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:842)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:487)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.Throwable
	at com.intellij.openapi.util.ObjectNode.<init>(ObjectNode.java:31)
	at com.intellij.openapi.util.ObjectTree.createNodeFor(ObjectTree.java:99)
	at com.intellij.openapi.util.ObjectTree.register(ObjectTree.java:60)
	at com.intellij.openapi.util.Disposer.register(Disposer.java:73)
	at com.intellij.util.Alarm.<init>(Alarm.java:130)
	at com.intellij.openapi.ui.LoadingDecorator.<init>(LoadingDecorator.java:54)
	at com.intellij.openapi.ui.LoadingDecorator.<init>(LoadingDecorator.java:47)
	at com.intellij.openapi.ui.LoadingDecorator.<init>(LoadingDecorator.java:43)
	at com.intellij.ui.components.JBLoadingPanel.lambda$new$0(JBLoadingPanel.java:29)
	at com.intellij.ui.components.JBLoadingPanel.<init>(JBLoadingPanel.java:38)
	at com.intellij.ui.components.JBLoadingPanel.<init>(JBLoadingPanel.java:29)
	at io.ktor.initializr.intellij.features.KtorFeaturesStep.<init>(KtorFeaturesStep.kt:33)
	at io.ktor.initializr.intellij.KtorModuleBuilder.createWizardSteps(KtorModuleBuilder.kt:63)
	at com.intellij.ide.util.newProjectWizard.StepSequence.addStepsForBuilder(StepSequence.java:52)
	at com.intellij.ide.projectWizard.ProjectTypeStep.<init>(ProjectTypeStep.java:234)
	at com.intellij.ide.projectWizard.NewProjectWizard.init(NewProjectWizard.java:57)
	at com.intellij.ide.projectWizard.NewProjectWizard.<init>(NewProjectWizard.java:46)
	at com.intellij.ide.actions.NewProjectAction.actionPerformed(NewProjectAction.java:20)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performAction(ActionUtil.java:247)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:236)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAwareWithCallbacks(ActionUtil.java:229)
	at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreenActionsUtil.performAnActionForComponent(WelcomeScreenActionsUtil.java:96)
	at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreenActionsUtil$ToolbarTextButtonWrapper$1.actionPerformed(WelcomeScreenActionsUtil.java:56)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
	at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
	at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:270)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6652)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3345)
	at java.desktop/java.awt.Component.processEvent(Component.java:6417)
	at java.desktop/java.awt.Container.processEvent(Container.java:2263)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2784)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4859)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:778)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:751)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:749)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:748)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:896)
	at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:828)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:765)
	... 11 more

Example:

route("path1/path2") {
    get {}
    post {}
}

path1/path2 will not be visible in Endpoints View while it must be there twice: for POST and for GET methods.

If I create a project with ContentNegotiation, Gson, and Routing, I don't get a run configuration automatically configured. I need to press the green gutter play icon, or run the run Gradle task.

Adding a bunch more features seems to sometimes include a default "ApplicationKt" run configuration.

For some reason it also add numerous entries

<repositories>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>

1. Create a new Ktor project.
2. Go to the Features page and find the Micrometer Metrics feature.
3. Find the [monitoring the JVM][micrometer_jvm_metrics] text => should be a link

1. Create a new Ktor project.
2. Go to the Features page and find the Micrometer Metrics feature.
3. Click any link => doesn't work

When I scroll feature documentation to some point and then click to another feature the scroll position remains the same. This requires me to scroll to the top to start reading another feature's documentation.

As a Ktor backend developer I want to have an IDE interface with endpoints list, generated from my routing configuration:


Possible features of endpoints map:

• go to the related code;
• generate a new route wizard;
• open in browser;
• generate dummy request with applicable params (according to data class) for IDEA http-client;
• generate test from request/response;
• show pipelines and interceptors chain;
• show execution timings

From the route handler context I want to get a client's IP address but unfortunately, call.request.origin.remoteHost returns symbolic name in some cases, e.g. localhost.
A relevant question on the StackOverflow https://stackoverflow.com/questions/67054276/how-to-get-client-ip-with-ktor

When setting basename

  install(DropwizardMetrics) {
            registry = metricRegistry
            baseName = "my.prefix"
        }

metrics for endpoints does not get prefixed with the baseName I set.

When GET-ing /some/path/ I get metrics /some/path/(method:GET) but I expect my.prefix./some/path/(method:GET)

I am using ktor 1.5.2

In the load function the session id key is put into call attributes.

In line 88 it is put into attributes again with the comment "remove".

This might be wrong, it should remove the session id, if I understand the mechanics correctly.

Main goals

1. Make API easy to understand for users:
   a) Get rid of concept of pipelines and phases
   b) Make API compact (reduce number of options available, i.e. consider smaller number of "phases")
   c) Rework naming to make it intuitive
   d) Think about defaults and yet support common case
2. API must be compatible with old existing features
3. All usages of old features rewritten with new API must remain unchanged yet working. This means all import {...} blocks should still work for features rewritten to the new API as well as with the old features.
4. Choosing "phase" must become intuitive and easy
5. Old API functionality should remain available for experienced users.
6. API should fit into Kotlin best patterns and concepts (DSL is a good option here)

Onboarding (first steps)

Old API

Let's take a look at some small feature that was defined with the old Features API. This example was taken from our official documentation:

class CustomFeature(configuration: Configuration) {
    val prop = configuration.prop // Copies a snapshot of the mutable config into an immutable property.

    class Configuration {
       var prop = "value" // Mutable property.
    }

    // Implements ApplicationFeature as a companion object.
    companion object Feature : ApplicationFeature<ApplicationCallPipeline, CustomFeature.Configuration, CustomFeature> {
       // Creates a unique key for the feature.
       override val key = AttributeKey<CustomFeature>("CustomFeature")

       // Code to execute when installing the feature.
       override fun install(pipeline: ApplicationCallPipeline, configure: Configuration.() -> Unit): CustomFeature {

           // It is responsibility of the install code to call the `configure` method with the mutable configuration.
           val configuration = CustomFeature.Configuration().apply(configure)

           // Create the feature, providing the mutable configuration so the feature reads it keeping an immutable copy of the properties.
           val feature = CustomFeature(configuration)

           // Intercept a pipeline.
           pipeline.intercept(…) {
                // Perform things in that interception point.
           }
           return feature
       }
    }
}

Old Problems:

• This code does not look welcoming to newcomers at all.
• It is not easy to understand.
• It contains a lot of concepts to deal with that are not hidden by the API: ApplicationFeature<ApplicationCallPipeline, CustomFeature.Configuration, CustomFeature>, AttributeKey<CustomFeature>, ApplicationCallPipeline, pipeline.intercept
• It is not clear where is the feature itself and where is it's configuration: there is a CustomFeature that has some properties, and there is also a Configuration class that defines configuration, and there is also a Feature object. It is not 100% obvious how each of them is used and such model confuses unexperienced readers because there is no clear separation between these concepts.

Proposed solution:

1. Instead of creating 2 nested classes and an object, extending some weird class ApplicationFeature<ApplicationCallPipeline, CustomFeature.Configuration, CustomFeature> now it is sufficient to just create an instance of KtorFeature using createFeature { ... } DSL method, and to define a configuration class for it separately:

class Configuration {
    // Properties and configuration functions go here:
    ...
}

val CustomFeature = createFeature(name = "CustomFeature", createConfiguration = ::Configuration) {
    // What feature does goes here:
    ...
}

This feature can now be used as it was before, with just calling install and configuring it in your main application code:

install(CustomFeature) {
    // set mutable config properties
}

Benefits

• Now, users will see much more clear separation between the data and actions, and they will not have to deal with confusing methods and base classes to extend.
• It is fully compatible with the old code that uses features

Extending Ktor HTTP behaviour

Old API

In the old API users had to deal with a concept of phases and pipelines. Below there is a list of them:

• ApplicationCallPipeline
  • Setup : Phase for preparing call and it's attributes for processing
  • Monitoring : Phase for preparing call and it's attributes for processing
  • Features : Phase for features. Most features should intercept this phase.
  • Call : Phase for processing a call and sending a response
  • Fallback : Phase for handling unprocessed calls
• ApplicationSendPipeline
  • Before : The earliest phase that happens before any other
  • Transform : Transformation phase that can proceed with any supported data like String
  • Render : Phase to render any current pipeline subject into [io.ktor.http.content.OutgoingContent], beyond this phase only [io.ktor.http.content.OutgoingContent] should be produced by any interceptor
  • ContentEncoding : Phase for processing Content-Encoding, like compression and partial content
  • TransferEncoding : Phase for handling Transfer-Encoding, like if chunked encoding is being done manually and not by engine
  • After : The latest application phase that happens right before engine will send the response
  • Engine : Phase for Engine to send the response out to client.
• ApplicationReceivePipeline
  • Before : Executes before any transformations are made
  • Transform : Executes transformations
  • After : Executes after all transformations

Note, that in the list above phases are ordered!

Also, each feature had an ability to create it's custom phase in any of the 3 pipelines, and insert this phase anywhere in the order of existing phases. In order to use some phase ("intercept a pipeline in a specific phase") a feature was meant to call pipeline.intercept method on a specific phase.

Here is an example of usage of the old API taken from the MicrometerMetrics implementation:

 override fun install(pipeline: Application, configure: Configuration.() -> Unit): MicrometerMetrics {
    ...
    val phase = PipelinePhase("MicrometerMetrics")
    pipeline.insertPhaseBefore(ApplicationCallPipeline.Monitoring, phase)

    pipeline.intercept(phase) {
        // some actions go here
    }
    val postSendPhase = PipelinePhase("MicrometerMetricsPostSend")
    pipeline.sendPipeline.insertPhaseAfter(ApplicationSendPipeline.After, postSendPhase)
    pipeline.sendPipeline.intercept(ApplicationSendPipeline.After) {
        // some actions go here
    }

Old problems:

• There too many phases and pipelines (3 pipelines with 15 phases total)
• Not obvious which phase to select,
• No defaults for some simple usage (onboarding)
• With user-defined phases and insertBefore/insertAfter it builds a complex mental model of the global order of phases and requires a deep knowledge about phases each feature uses in order to think about the order of execution.
• Concept of phases and pipelines is not intuitive and does not mentally map to the concept of Routing in Ktor. It is not obvious when each phase is executed and what are the pipelines.

Proposed solution:

First of all, there should be simple defaults that would extend basic functionalities that users see in Ktor.
There will be 3 "default" methods that are mapped by name with what call inside a routing block each of them extend:

• onCall : extends what happens when a server is processing any HTTP method call
• onReceive : extends behaviour of the server when user writes call.receive() in a route { ... } block
• onRespond : extends behaviour of the server when user writes call.respond() (call.respondText(), etc.) in a route { ... } block

In code they should be placed inside createFeature block:

val F = createFeature(...) {
    onCall {
        ...
    }
    onReceive {
        ...
    }
    onRespond {
        ...
    }
}

Such defaults are useful for newbies because they are meant to provide the most commonly used functionality without a requirement to know a lot about other options.

Also, for some more advanced use cases there will be more advanced builders with more options to extend:

1. extendCallHandling { ... } -- a block that configures what happens when HTTP method call handling

   • monitoring { ... } -- defines actions to perform before the call was processed by any feature (including Routing). It is useful for monitoring and logging (see CallLogging feature) to be executed before any "real stuff" was performed with the call because other features can change it's content as well as add more resource usage etc. while for logging and monitoring it is important to observe the pure (untouched) data.
   • onCall { ... } -- same as onCall outside of extendCallHandling. Most used extension. It defines what to do with the call that is being currently processed by a server.
   • fallback -- defines what to do with the call in case request was not handled for some reason. Usually, it is handy to use fallback { call -> ...} to set the response with some message or status code, or to throw an exception.

2. extendReceiveHandling supports following callbacks:

   • beforeReceive — defines actions to perform before any transformations were made to the received content. It is useful for caching.
   • onReceive — defines how to transform data received from a client.

3. extendResponseHandling supports following callbacks:

   • beforeResponse — allows to use the direct result of call processing (see onCall)
   • onResponse — does transformations of the data. Example: you can write a custom serializer wit h it.
   • afterResponse — allows to calculate some stats on the data that was sent, or to handle errors. It is used in Metrics, CachingHeaders, StatusPages.

Example:

val F = createFeature(...) {
    onCall {
        // prepare some data
    }
    extendResponseHandling {
        beforeResponse {
            // use this data
        }
        onResponse {
            // transform data to a string (i.e. serialize data)
        }
    }
}

Benefits:

• Now we provide fast-to-access defaults that newbies can use (now it is obvious what to select from: not sure -- use a default)
• There are much less options to select from, and these options are mapped to what users do when they define handling of routes
• Api doesn't introduce any new complex or uncommon concepts (like phases or pipelines, or interceptors)

Managing order of execution between features

Old API

In the old API there was a concept of phases that one could introduce and then insert anywhere with insertPhaseBefore / insertPhaseAfter, and then intercept these phases. One of the most common things it was used for was creating order dependencies between features. This idea is explained here: https://www.ximedes.com/2020-09-17/role-based-authorization-in-ktor/. This was useful to either prepare some data that can be used later by another feature, or to use some data already produced by some other feature.

Old Problems:

• It required using 3 concepts to do 1 thing: use "phase", "insertPhase" and "intercept" in order to "execute one feature before/after another"
• It required explicitly knowing which phases another feature was using.

Proposed solution:

Each feature now internally remembers which phases in which pipelines it intercepts (of course, without revealing this complex and confusing information to users). And createFeature block also provides following functions inside:

• beforeFeature(other) { ... }
• afterFeature(other) { ... }

Example:

val F = createFeature(...) {
    ...
}

val G = createFeature(...) {
    beforeFeature(F) {
        onCall {
            // prepare some data for feature F
        }
    }
}

Benefits:

Now the API just does what it says: it is simply executing one feature before/after another without introducing any complex entities and without a requirement to manually manage the internals.

Manually managing features execution:

Old API

In the old API it was possible to manually manage execution of the current pipeline. Inside any interceptor it was possible to call the following functions of PipelineContext<, >:

public interface PipelineContext<TSubject : Any, TContext : Any> : CoroutineScope {
    /**
     * Object representing context in which pipeline executes
     */
    public val context: TContext

    /**
     * Subject of this pipeline execution that goes along the pipeline
     */
    public val subject: TSubject

    /**
     * Finishes current pipeline execution
     */
    public fun finish()

    /**
     * Continues execution of the pipeline with the given subject
     */
    public suspend fun proceedWith(subject: TSubject): TSubject

    /**
     * Continues execution of the pipeline with the same subject
     */
    public suspend fun proceed(): TSubject
}

Also, there were some extension methods over this class:

• application : Current application for the context
• call : Current call for the context
• transformDefaultContent : Default outgoing content transformation

Although it introduced really complex concept of subject to understand, it can be required for some advanced users and we can't get rid of it completely. One of the most popular patterns that use PipelineContext is the following (taken from VelocityFeature):

pipeline.sendPipeline.intercept(ApplicationSendPipeline.Transform) { value ->
    if (value is VelocityContent) {
        val response = feature.process(value)
        proceedWith(response)
    }
}

It actually allows to write a custom data serializer for a specific type (VelocityContent in this example). proceedWith(outgoingContent) allows to continue the execution of our HTTP pipeline with the data serialized to a resulting outgoingContent.

Old problems

• Really complex and hard to understand but yet useful
• Some members/extensions are not that popular or not required for the API (application is not commonly used, context makes no sense to newbies)
• proceedWith and suject are useful but are mostly used for serialization features
• serialization use case requires knowing about OutgoingContent type that is not mapped to any general knowledge, and in fact there is always a default serializer from String, ByteChanel and ByteArray types to the OutgoingContent.

Proposed solution:

1. For the case of serialization we will introduce following simple API that users may default to:

public fun <T : Any> KtorFeature<T>.serializeDataToString(callback: suspend SendExecution.(Any) -> String?): Unit =
    onSend { callback(subject)?.let { proceedWith(it) } }

public fun <T : Any> KtorFeature<T>.serializeDataToBytes(callback: suspend SendExecution.(Any) -> ByteArray?): Unit =
    onSend { callback(subject)?.let { proceedWith(it) } }

public fun <T : Any> KtorFeature<T>.serializeDataToChanel(callback: suspend SendExecution.(Any) -> ByteWriteChannel?): Unit =
    onSend { callback(subject)?.let { proceedWith(it) } }

This API can be used as following:

private class Formula(val x: String, val execute: (String) -> String)

private val F = createFeature("F", {}) {
    serializeDataToString { f ->
        // return null for irrelevant data types
        if (f !is Formula) return@serializeDataToString null

        // Do a transformation for the current data type
        f.execute(f.x)
    }
}

private fun Application.f() {
    routing {
        get("/") {
            call.respond(Formula("cake") { x -> "x * x + 1".replace("x", x) })
        }
    }
}

Also, for any more complex use cases we will introduce the following wrapper over PipelineContext<SubjectT, ApplicationCall>. It is meant to hide unneeded methods and extensions without limiting functionality too much:

public inline class Execution<SubjectT : Any>(private val context: PipelineContext<SubjectT, ApplicationCall>) {
    public suspend fun proceed(): SubjectT = context.proceed()
    public suspend fun proceedWith(subectT: SubjectT): SubjectT = context.proceedWith(subectT)
    public fun finish(): Unit = context.finish()
    public val subject: SubjectT get() = context.subject
    public val call: ApplicationCall get() = context.call
...

update cc @leonid.stashevsky Also following methods can be added to handle application-level properties from a feature:

    // Useful methods
    public val environment: ApplicationEnvironment get() = context.application.environment
    public val configuration: ApplicationConfig get() = environment.config
    public val port: Int get() = configuration.propertyOrNull("ktor.deployment.port")?.getString()?.toInt() ?: 8080
    public val host: String get() = configuration.propertyOrNull("ktor.deployment.host")?.getString() ?: "0.0.0.0"
    // Following calback can be used to close resources that a feature has allocated (if needed):
     public fun onShutdown(callback: suspend () -> Unit) {
        GlobalScope.launch(context.coroutineContext) {
            callback()
        }
    }
}

Also there are type aliases for executions of the different stages:

public typealias CallExecution = Execution<Unit>
public typealias ReceiveExecution = Execution<ApplicationReceiveRequest>
public typealias SendExecution = Execution<Any>

Each of the methods has a corresponding Execution type as a reciever for a callback, for example:

public override fun onCall(callback: suspend CallExecution.(ApplicationCall) -> Unit): Unit { ... }

This means, that inside a feature definition advanced users who know what they do may use proceed, finish etc. methods anywhere in the code:

val F = createFeature(...) {
    extendRespondHandling {
        beforeRespond {
            ...
            if (someCondition)
                finish()
            ...
        }
    }
}

update cc @leonid.stashevsky Another option for an API

There are following minor issues with the proposed API:

• Naming is quite long for advanced options (extendCallHandling as opposed to onCall), although it is made so intentionally to hide advanced settings from newbies by a longer name.
• It sometimes requires writing thisin Intellij in order to call a completion to learn what's next.

Benefits

• Now it is easy to write serializers
• Now advanced users can still use what they want
• No complex classes are in your face when you write simple code, so nothing will confuse newbies.

Alternative

We can introduce following interfaces (usage will be described later):

public interface OnCall {
    public operator fun invoke(callback: suspend CallExecution.(ApplicationCall) -> Unit): Unit
    public fun monitoring(callback: suspend CallExecution.(ApplicationCall) -> Unit): Unit
    public fun fallback(callback: suspend CallExecution.(ApplicationCall) -> Unit): Unit
}

public interface OnReceive {
    public operator fun invoke(callback: suspend ReceiveExecution.(ApplicationCall) -> Unit): Unit
    public fun before(callback: suspend ReceiveExecution.(ApplicationCall) -> Unit): Unit
}

public interface OnResponse {
    public operator fun invoke(callback: suspend ResponseExecution.(ApplicationCall) -> Unit): Unit
    public fun before(callback: suspend ResponseExecution.(ApplicationCall) -> Unit): Unit
    public fun after(callback: suspend ResponseExecution.(ApplicationCall) -> Unit): Unit
}

And change FeatureContext (a supertype of KtorFeature) to the following:

public interface FeatureContext {
    public val onCall: OnCall
    public val onReceive: OnReceive
    public val onResponse: OnResponse
}

After implementing FeatureContext it will allow us to write the code in the next way:

val F = makeFeature("F", {}) {

    onCall { ... }

    onCall.fallback { ... }
    onCall.monitoring { ...}

    beforeFeature(G) {
        onCall { ... }
        onReceive.before { ... }
        onResponse.after { ... }
    }
    ...

So, in general, following API transformations have been applied:

• onCall { ... } -> onCall { ... }
• extendCallExecution { fallback { ... } } -> onCall.fallback { ... }
• extendCallExecution { monitoring { ... } } -> onCall.monitoring { ... }
• onRespond { ... } -> onRespond { ... }
• extendRespondExecution { before { ... } } -> onRespond.before { ... }
• extendRespondExecution { after { ... } } -> onRespond.after { ... }
• onReceive { ... } -> onReceive { ... }
• extendReceiveExecution { before { ... } } -> onReceive.before { ... }

Benefits

• Much shorter and readable names
• Advanced functionality is still hidden (now it is hidden by the dot .)
• Completion perfectly works when one types a dot after an object name to see the options
• Simple things are kept the same because onCall, onReceive and onSend are executable objects now

Disadvantages

• Not conventional way of writing API, may be uncommon to write dots after kinda-function names

update cc @leonid.stashevsky Compatibility with features written in old API

New API provides an ability for features to interact/depend on each other with beforeFeature and afterFeature.

Inside it automatically creates everything that is needed to guarantee the order between features.
But this change requires old features to imlement new interface InterceptionsHolder in order to make it working with the old features. We can easily do that for builtin features:

/**
 * Compatibility class. Interception class for Call phase
 * */
public typealias CallInterception = Interception<Unit>
/**
 * Compatibility class. Interception class for Receive phase
 * */
public typealias ReceiveInterception = Interception<ApplicationReceiveRequest>
/**
 * Compatibility class. Interception class for Send phase
 * */
public typealias ResponseInterception = Interception<Any>

/**
 * Compatibility class. Every feature that needs to be compatible with `beforeFeature(...)` and `afterFeature(...)`
 * needs to implement this class. It defines a list of interceptions (see [Interception]) for phases in different pipelines
 * that are being intercepted by the current feature.
 * 
 * It is needed in order to get first/last phase in each pipeline for the current feature and create a new phase
 * that is strictly earlier/later in this pipeline than any interception of the current feature.
 * 
 * Note: any [KtorFeature] instance automatically fills these fields and there is no need to implement them by hand.
 * But if you want to use old feature API based on pipelines and phases and to make it available for `beforeFeature`/
 * `afterFeature` methods of the new features API, please consider filling the phases your feature defines by implementing
 * this interface [InterceptionsHolder].
 * */
public interface InterceptionsHolder {
    public val name: String get() = this.javaClass.simpleName

    public val fallbackInterceptions: MutableList<CallInterception>
    public val callInterceptions: MutableList<CallInterception>
    public val monitoringInterceptions: MutableList<CallInterception>

    public val beforeReceiveInterceptions: MutableList<ReceiveInterception>
    public val onReceiveInterceptions: MutableList<ReceiveInterception>

    public val beforeResponseInterceptions: MutableList<ResponseInterception>
    public val onResponseInterceptions: MutableList<ResponseInterception>
    public val afterResponseInterceptions: MutableList<ResponseInterception>

    public fun newPhase(): PipelinePhase = PipelinePhase("${name}Phase${Random.nextInt()}")
}

Question: should we make it internal and hide

pros:

• It reveals old API abstactions and is really complex
• It has a lot of fields to implement and is confusing
• We can implement it in our builtin features and this will cover almost all the cases of the features interaction. It is very rare when someone wants to insert their feature before/after some other third-party feature while it is much more common to insert one relatively to some builtin feature. For the rest of the cases, we can suggest using new API that is easier and does all the work automatically.

cons:

• (Didn't actually find any use-case) probably we'll force old users to rewrite their features with the new API to make them available to the new features.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1656

Ktor Version and Engine Used (client or server and name)
1.3.0

Describe the bug
CORS can't pass on some none standard orgin like chrome-extension://mfgdmpfihlmdekaclngibpjhdebndhdj

To Reproduce
open some new page in chrome or other browser,just call any api,CORS throw would error(brower side).

Expected behavior
should be AnyOrigin pass by CORS, when we config it as host("*") or anyHost()

Hi team,
I'm using as Jackson content negotiation feature and can't override Kotlin module configuration when installing using jackson function.
Here's my code:

install(ContentNegotiation) {
  jackson {
    registerModule(kotlinModule { nullIsSameAsDefault(true) }) // doesn't work ❌
    registerModule(KotlinModule(nullIsSameAsDefault = true)) // also doesn't work ❌
  }
}

When I trace to ktor-jackson source code, I found this code:

fun jacksonObjectMapper(): ObjectMapper = jsonMapper { addModule(kotlinModule()) }

Look like Kotlin module already added and there is no way to reconfigure it (?). I can't get any information in issues and documentation page.

My temporary workaround,

install(ContentNegotiation) {
  val mapper = jsonMapper { addModule(KotlinModule(nullIsSameAsDefault = true)) } // work great ✔
  val jackson = JacksonConverter(mapper)
  register(ContentType.Application.Json, jackson)
}

Thank you!

kotlin: 1.4.20
kotlinx.coroutines: 1.4.2

Sessions feature is configured in a rather standard manner:

        install(Sessions) {
            cookie<UserIdPrincipal>(
                Cookies.SESSION_ID,
                storage = directorySessionStorage(sessionStorageRootDir)
            ) {
                cookie.path = "/"
                cookie.httpOnly = true
                cookie.extensions["SameSite"] = "Lax"
            }
        }

When it is called during a pipeline execution, an unexpected exception is thrown.

java.lang.IllegalStateException: Using blocking primitives on this dispatcher is not allowed. Consider using async channel instead or use blocking primitives in withContext(Dispatchers.IO) instead.
	at io.ktor.utils.io.jvm.javaio.BlockingKt.ensureParkingAllowed(Blocking.kt:302) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.access$ensureParkingAllowed(Blocking.kt:1) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.InputAdapter.<init>(Blocking.kt:30) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream$default(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.DirectoryStorage.read(DirectoryStorage.kt:46) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invokeSuspend(Cache.kt:82) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invoke(Cache.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseCache$getOrCompute$2$1.invokeSuspend(Cache.kt:38) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	(Coroutine boundary) ~[?:?]
	at kotlinx.coroutines.DeferredCoroutine.await$suspendImpl(Builders.common.kt:101) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.sessions.ReferenceCache.getOrCompute$suspendImpl(Cache.kt:86) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage.read(CacheStorage.kt:20) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionTrackerById.load(SessionTrackerById.kt:34) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionsKt.receiveSessionData(Sessions.kt:215) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.Sessions$Feature$install$1.invokeSuspend(Sessions.kt:259) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.ContentNegotiation$Feature$install$1.invokeSuspend(ContentNegotiation.kt:110) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$interceptCall$2.invokeSuspend(StatusPages.kt:102) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages.interceptCall(StatusPages.kt:101) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$Feature$install$2.invokeSuspend(StatusPages.kt:142) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.CallLogging$Feature$install$2.invokeSuspend(CallLogging.kt:139) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invokeSuspend(DefaultEnginePipeline.kt:118) ~[ktor-server-host-common-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invokeSuspend(NettyApplicationCallHandler.kt:118) ~[ktor-server-netty-jvm-1.4.3.jar:1.4.3]
Caused by: java.lang.IllegalStateException: Using blocking primitives on this dispatcher is not allowed. Consider using async channel instead or use blocking primitives in withContext(Dispatchers.IO) instead.
	at io.ktor.utils.io.jvm.javaio.BlockingKt.ensureParkingAllowed(Blocking.kt:302) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.access$ensureParkingAllowed(Blocking.kt:1) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.InputAdapter.<init>(Blocking.kt:30) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream$default(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.DirectoryStorage.read(DirectoryStorage.kt:46) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invokeSuspend(Cache.kt:82) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invoke(Cache.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseCache$getOrCompute$2$1.invokeSuspend(Cache.kt:38) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) ~[kotlin-stdlib-1.4.20.jar:1.4.20-release-308 (1.4.20)]
	at kotlinx.coroutines.internal.DispatchedContinuationKt.resumeCancellableWith(DispatchedContinuation.kt:342) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:30) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable$default(Cancellable.kt:27) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:109) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.async(Builders.common.kt:91) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt.async(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.async$default(Builders.common.kt:84) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt.async$default(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.sessions.BaseCache$getOrCompute$2.apply(Cache.kt:37) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseCache$getOrCompute$2.apply(Cache.kt:31) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[?:1.8.0_251]
	at io.ktor.sessions.BaseCache.getOrCompute(Cache.kt:36) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache.getOrCompute$suspendImpl(Cache.kt:86) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache.getOrCompute(Cache.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseTimeoutCache.getOrCompute(Cache.kt:163) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage.read(CacheStorage.kt:20) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionTrackerById.load(SessionTrackerById.kt:34) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionsKt.receiveSessionData(Sessions.kt:215) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.Sessions$Feature$install$1.invokeSuspend(Sessions.kt:63) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.Sessions$Feature$install$1.invoke(Sessions.kt) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.ContentNegotiation$Feature$install$1.invokeSuspend(ContentNegotiation.kt:110) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.ContentNegotiation$Feature$install$1.invoke(ContentNegotiation.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$interceptCall$2.invokeSuspend(StatusPages.kt:102) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$interceptCall$2.invoke(StatusPages.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:91) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.CoroutineScopeKt.coroutineScope(CoroutineScope.kt:194) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.features.StatusPages.interceptCall(StatusPages.kt:101) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$Feature$install$2.invokeSuspend(StatusPages.kt:142) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$Feature$install$2.invoke(StatusPages.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.CallLogging$Feature$install$2.invokeSuspend(CallLogging.kt:139) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.CallLogging$Feature$install$2.invoke(CallLogging.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:77) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invokeSuspend(DefaultEnginePipeline.kt:118) [ktor-server-host-common-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invoke(DefaultEnginePipeline.kt) [ktor-server-host-common-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:77) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invokeSuspend(NettyApplicationCallHandler.kt:118) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invoke(NettyApplicationCallHandler.kt) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startCoroutineUndispatched(Undispatched.kt:55) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:111) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:56) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt.launch(Unknown Source) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.server.netty.NettyApplicationCallHandler.handleRequest(NettyApplicationCallHandler.kt:43) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler.channelRead(NettyApplicationCallHandler.kt:34) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.ktor.server.netty.EventLoopGroupProxy$Companion$create$factory$1$1.run(NettyApplicationEngine.kt:216) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_251]

Code snippet:

    val server = embeddedServer(Netty, env) {
        configureBootstrap = {
            group(NioEventLoopGroup(16, Executors.newCachedThreadPool()))
        }
    }

During NettyApplicationEngine initialization we have:

    private val bootstraps = environment.connectors.map { connector ->
        ServerBootstrap().apply {
            configuration.configureBootstrap(this)
            group(connectionEventGroup, workerEventGroup)

The call to group(...) tries to initialize the parent and child EventLoopGroups for a second time, which throws the exception above.

Actually there exists a overloaded post function in Routing.kt, which allows you to write:

routing {
    post<Foo> { foo ->

    }
}

This overload is only available for POST, but not for PATCH or PUT too.

Added these two overloads in PR:

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/831

Ktor Version

1.0.1

Ktor Engine Used(client or server and name)

Jetty Server

JVM Version, Operating System and Relevant Context

1.8.0 Update 191, macOS 10.14.2

Feedback

I use post<List<ConfigCorepage>>("/api/pageName/update") to accept the json content from user request, but ktor couldn't recognize the type List<ConfigCorepage>, it use List instead.

I debug the code, and find that the code here shouldn't use T::class.

Jackson use a TypeReference class for preserving class info, ktor should use the same tricks.

Enviroment:
os: MacOs Cantalina 10.15.6
ide:IntelliJ IDEA 2021.1 (Ultimate Edition)
Build #IU-211.6693.111, built on April 6, 2021
Runtime version: 11.0.10+9-b1341.35 x86_64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
macOS 10.15.6
GC: G1 Young Generation, G1 Old Generation
Memory: 1024M
Cores: 4
Non-Bundled Plugins: com.poratu.idea.plugins.tomcat (3.8.3), wu.seal.tool.jsontokotlin (3.6.1), intellij.ktor (1.5.3), Dart (211.6693.108), org.intellij.scala (2021.1.16)
Kotlin: 211-1.4.32-release-IJ6693.72

I created a sample project by Ktor plugin( as described in https://ktor.io/docs/intellij-idea.html )

then run application，these message displayed in the terminal window:

2021-04-11 09:31:59.454 [main] INFO  ktor.application - Autoreload is disabled because the development mode is off.
2021-04-11 09:31:59.555 [main] INFO  ktor.application - Responding at http://0.0.0.0:8080

but the http://0.0.0.0:8080 didn't display "Hello world.“

solution:
kill nginx process,then restart the application.

In our project we have API clients with Reaktive interface (using Single, Completable) that use ktor, and hence coroutines under the hood.

In tests, we use Reaktive's test helpers so that our tests look like this:

apiClient.doStuff()
    .test()
    .assertCompleted()
// other checks follow, like checking calls on dependencies' mocks etc.

After trying to bump ktor from 1.4.* to 1.5.3 (we later identified that the 1.5.1 is enough to trigger the issue), these tests started failing but only on JVM. Adding a sleep(1000) call between .test() and .assertCompleted() makes the test green again, another potential workaround is using Reaktive's blockingGet instead, but ideally we'd like to keep such tests sync.

Under the hood, our tests rely on MockEngine from ktor. Dispatchers.Unconfined is used for everything in test setup.

Hi,

First of all, thank you for creating and maintaining ktor, we enjoy using it a lot! The issue we notice that after v1.5.2, developmentMode value is set as true by default in tests (more precisely it is on when assertions are enabled) -> https://github.com/ktorio/ktor/blob/de742d1adfbbb994bedda198e6739c724e62a974/ktor-utils/jvm/src/io/ktor/util/PlatformUtils.kt#L15-L16
This issue causes our test cases to fail since, in developmentMode, the application is started in a different classloader which leads to some problems with our test setup. We had to override the `io.ktor.development` value to solve it for now.

We believe that this behavior is unintended and a bug. Could you please take a look and provide a better developmentMode resolving method?

In 2.0.0 branch IOBuffer was removed, but main branch has new tests that use it.

If you have a common module containing the api for your app, you can't annotate the functions with @Throws(IosHttpRequestException::class), because IosHttpRequestException is defined in the iOS client only and is a subclass from Exception. Adding @Throws(Exception::class) is not a good choice, because a possible wrong request builder is catched too (eg invalide urlString).

class API(val client: HttpClient) {

@Throws(IosHttpRequestException::class) // not possible in commonMain
suspend fun users() = client.get<List<User>>("/users")
}

solution

class API(val client: HttpClient) {

@Throws(IOException::class)
suspend fun users() = client.get<List<User>>("/users")
}

PR: https://github.com/ktorio/ktor/pull/2436

Periodically (not every time) during running tests in https://github.com/rsocket/rsocket-kotlin using ktor-io exception appeared trying to build ByteReadPacket using buildPacket {}

Exception in thread "DefaultDispatcher-worker-9 @coroutine#122840" io.ktor.utils.io.core.InsufficientSpaceException: Not enough free space to write long integer of 8 bytes, available 7 bytes.
	at io.ktor.utils.io.core.BufferPrimitivesKt.writeLong(BufferPrimitives.kt:1081)
	at io.ktor.utils.io.core.OutputPrimitivesKt.writeLongFallback(OutputPrimitives.kt:50)
	at io.ktor.utils.io.core.OutputPrimitivesKt.writeLong(OutputPrimitives.kt:45)
	at io.rsocket.kotlin.frame.KeepAliveFrame.writeSelf(KeepAliveFrame.kt:33)
	at io.rsocket.kotlin.frame.Frame.toPacket(Frame.kt:36)
	at io.rsocket.kotlin.internal.RSocketState$start$3.invokeSuspend(RSocketState.kt:143)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.selects.SelectBuilderImpl.resumeWith(Select.kt:306)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:738)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

CommandLine.kt

requireNotNull(getKey(sslKeyAlias, sslPrivateKeyPassword.toCharArray()) == null)

is always successful

Multiple instance of "has been" in exception messages such as

Request timeout has been expired 

https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreLinuxJava11/22298?

https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreLinuxJava8/21950

https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixStressTestLinuxJava8/22168?

Hi,

my ktor service cannot start with -javaagent elasticsearch apm.

i ran with this :

java -javaagent:./resources/elastic-apm-agent-1.21.0.jar \
     -Delastic.apm.service_name=service-xxx \
     -Delastic.apm.server_urls=http://xxx \
     -Delastic.apm.application_packages=com.package.xxx \
     -jar ./build/libs/xxx.jar

and got this error :

OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/build/libs/xxx.dirty.jar!/co/elastic/apm/agent/shaded/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/resources/elastic-apm-agent-1.21.0.jar!/co/elastic/apm/agent/shaded/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [co.elastic.apm.agent.shaded.apache.logging.slf4j.Log4jLoggerFactory]
2021-04-21 15:35:53,748 [main] INFO  co.elastic.apm.agent.util.JmxUtils - Found JVM-specific OperatingSystemMXBean interface: com.sun.management.OperatingSystemMXBean
2021-04-21 15:35:53,819 [main] INFO  co.elastic.apm.agent.configuration.StartupInfo - Starting Elastic APM 1.21.0 as service-customer on Java 11.0.10 Runtime version: 11.0.10+9-Ubuntu-0ubuntu1.20.04 VM version: 11.0.10+9-Ubuntu-0ubuntu1.20.04 (Ubuntu) Linux 5.4.0-67-generic
2021-04-21 15:35:53,819 [main] INFO  co.elastic.apm.agent.configuration.StartupInfo - VM Arguments: [-javaagent:./resources/elastic-apm-agent-1.21.0.jar, -Delastic.apm.service_name=service-xxx, -Delastic.apm.server_urls=http://xxx, -Delastic.apm.application_packages=com.package.xxx]
2021-04-21 15:35:55,473 [main] INFO  co.elastic.apm.agent.impl.ElasticApmTracer - Tracer switched to RUNNING state
2021-04-21 15:35:55,591 [elastic-apm-server-healthcheck] INFO  co.elastic.apm.agent.report.ApmServerHealthChecker - Elastic APM server is available: {  "build_date": "2021-01-12T21:51:32Z",  "build_sha": "42a349a4ec9d2dd16e08b8af125647294e7a7e4b",  "version": "7.10.2"}
2021-04-21 15:35:55,683 [elastic-apm-remote-config-poller] INFO  co.elastic.apm.agent.configuration.ApmServerConfigurationSource - Received new configuration from APM Server: {}
Exception in thread "main" java.lang.IllegalStateException: ApplicationEngineEnviron…t::class.java.classLoader must not be null
        at io.ktor.server.engine.ApplicationEngineEnvironmentBuilder.<init>(ApplicationEngineEnvironment.kt:65)
        at io.ktor.server.engine.ApplicationEngineEnvironmentKt.applicationEngineEnvironment(ApplicationEngineEnvironment.kt:44)
        at io.ktor.server.engine.CommandLineKt.commandLineEnvironment(CommandLine.kt:57)
        at io.ktor.server.netty.EngineMain.main(EngineMain.kt:21)
2021-04-21 15:35:55,906 [elastic-apm-init-instrumentation-shutdown-hook] INFO  co.elastic.apm.agent.impl.ElasticApmTracer - Tracer switched to STOPPED state

im looking the way to solve from this error, with no luck
what should i do?

thanks

I wrote it like this:

//Application.kt
post("/login") {
   val user = call.receive<User>()
   if(database.sequenceOf(Users).any {Users.user_name eq "abcdefg"}) {
       database
            .from(Users)
            .select(Users.user_name, Users.user_pass)
            .where {(Users.user_pass eq "114514") and (Users.user_name eq "abcdefg")}
            .forEach { row ->
                 call.respond(mapOf("type" to Type.SUCCESS, "token" to Auth.sign("abcdefg")))
             }
     } else {
              call.respond(mapOf("message" to "User or password wrong", "type" to Type.WRONG_PASSWORD_OR_NAME))
     }
}
//User.kt
data class User(
    val user: String,
    val pass: String
)

But it had a empty response body, I don't know how to solve that.(I think there aren't any problems in the sql query part)

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" java.net.ConnectException: Connection refused: no further information
	at java.base/sun.nio.ch.Net.pollConnect(Native Method)
	at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:589)
	at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:839)
	at io.ktor.network.sockets.SocketImpl.connect$ktor_network(SocketImpl.kt:37)
	at io.ktor.network.sockets.SocketImpl$connect$1.invokeSuspend(SocketImpl.kt)
	(Coroutine boundary)
	at kotlinx.coroutines.CompletableDeferredImpl.await(CompletableDeferred.kt:87)
	at io.ktor.client.engine.cio.CIOEngine.execute(CIOEngine.kt:80)
	at io.ktor.client.engine.HttpClientEngine$executeWithinCallContext$2.invokeSuspend(HttpClientEngine.kt:86)
	(Coroutine creation stacktrace)
	at kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:122)
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:26)
	at kotlinx.coroutines.BuildersKt.async$default(Unknown Source)
	at io.ktor.client.engine.HttpClientEngine$DefaultImpls.executeWithinCallContext(HttpClientEngine.kt:81)
	at io.ktor.client.engine.HttpClientEngine$install$1.invokeSuspend(HttpClientEngine.kt:66)
	at io.ktor.client.engine.HttpClientEngine$install$1.invoke(HttpClientEngine.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133)
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:77)
	at io.ktor.client.features.HttpSend$DefaultSender.execute(HttpSend.kt:128)
	at io.ktor.client.features.HttpSend$Feature$install$1.invokeSuspend(HttpSend.kt:92)
	at io.ktor.client.features.HttpSend$Feature$install$1.invoke(HttpSend.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceedWith(SuspendFunctionGun.kt:123)
	at io.ktor.client.features.websocket.WebSockets$Feature$install$1.invokeSuspend(WebSockets.kt:60)
	at io.ktor.client.features.websocket.WebSockets$Feature$install$1.invoke(WebSockets.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceedWith(SuspendFunctionGun.kt:123)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:86)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invoke(HttpCallValidator.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invoke(HttpRequestLifecycle.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113)
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133)
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:77)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:188)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.features.websocket.BuildersKt.webSocket(builders.kt:209)
	at io.ktor.client.features.websocket.BuildersKt.webSocket(builders.kt:79)
	at io.ktor.client.features.websocket.BuildersKt.webSocket$default(builders.kt:77)
	at com.jetbrains.handson.chat.client.ChatClientKt$main$1.invokeSuspend(ChatClient.kt:16)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at com.jetbrains.handson.chat.client.ChatClientKt.main(ChatClient.kt:15)
	at com.jetbrains.handson.chat.client.ChatClientKt.main(ChatClient.kt)
	at kotlinx.coroutines.DeferredCoroutine.await$suspendImpl(Builders.common.kt:99)
	at io.ktor.client.features.HttpSend$DefaultSender.execute(HttpSend.kt:129)
	at io.ktor.client.features.websocket.WebSockets$Feature$install$1.invokeSuspend(WebSockets.kt:60)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:86)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:188)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.features.websocket.BuildersKt.webSocket(builders.kt:209)
	at com.jetbrains.handson.chat.client.ChatClientKt$main$1.invokeSuspend(ChatClient.kt:16)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:86)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:188)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.features.websocket.BuildersKt.webSocket(builders.kt:209)
	at com.jetbrains.handson.chat.client.ChatClientKt$main$1.invokeSuspend(ChatClient.kt:16)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:188)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.features.websocket.BuildersKt.webSocket(builders.kt:209)
	at com.jetbrains.handson.chat.client.ChatClientKt$main$1.invokeSuspend(ChatClient.kt:16)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:188)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.features.websocket.BuildersKt.webSocket(builders.kt:209)
	at com.jetbrains.handson.chat.client.ChatClientKt$main$1.invokeSuspend(ChatClient.kt:16)
Caused by: java.net.ConnectException: Connection refused: no further information
	at java.base/sun.nio.ch.Net.pollConnect(Native Method)
	at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:589)
Caused by: java.net.ConnectException: Connection refused: no further information

	at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:839)
	at io.ktor.network.sockets.SocketImpl.connect$ktor_network(SocketImpl.kt:37)
	at io.ktor.network.sockets.SocketImpl$connect$1.invokeSuspend(SocketImpl.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:738)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

> Task :ChatClientKt.main() FAILED

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/821

Hi Ktor team!

I have some problems with the client when make many parallels http requests.

I hope logs and code examples will help you.

Ktor Version

1.0.1

Ktor Engine Used

Android Engine

Features enabled

JsonFeature with GsonSerializer

Platform and hardware

Android 7, 4-core ARM CPU

Feedback

fun test() {
    for (i in 1..100) {
        println("Start launch")
        GlobalScope.launch(Dispatchers.Default) {
            val data = client.get<MyResponse>(url)
            println("Response completed: $i")
        }
        println("Finish launch")
    }
}`

Logs (please see time, it important, in really one request take about 1-3 seconds):
`
2018-12-24 01:07:47.388 I/System.out: Start launch
2018-12-24 01:07:47.403 I/System.out: Finish launch

// skiped logs: started 100 coroutines

2018-12-24 01:07:47.487 I/System.out: Start launch
2018-12-24 01:07:47.488 I/System.out: Finish launch // last coroutine started

// there is a big pause: in really one request take about 1-3 seconds

2018-12-24 01:07:57.671 I/System.out: Response completed: 9 // first response

// there is a big pause: in really request take about 1-3 seconds

2018-12-24 01:08:27.280 I/System.out: Response completed: 94 // second response
2018-12-24 01:08:28.265 I/System.out: Response completed: 1
2018-12-24 01:08:28.275 I/System.out: Response completed: 2
2018-12-24 01:08:28.285 I/System.out: Response completed: 4
2018-12-24 01:08:28.310 I/System.out: Response completed: 8
2018-12-24 01:08:28.396 I/System.out: Response completed: 80

// skiped logs: responses are distributed evenly in time

2018-12-24 01:08:29.268 I/System.out: Response completed: 92
2018-12-24 01:08:29.280 I/System.out: Response completed: 97
2018-12-24 01:08:29.296 I/System.out: Response completed: 99
2018-12-24 01:08:29.371 I/System.out: Response completed: 100 // last response`

I overrided GsonSerializer and added logs into problematic code.

override suspend fun read(type: TypeInfo, response: HttpResponse): Any {
    println("Start response.readText on ${Thread.currentThread().name}")
    val text = response.readText()
    println("End response.readText on ${Thread.currentThread().name}")
    return backend.fromJson(text, type.reifiedType) ?: Any()
}

Logs:

`2018-12-24 01:32:38.895 I/System.out: Start response.readText on DefaultDispatcher-worker-3 // first start readText
2018-12-24 01:32:38.895 I/System.out: Start response.readText on DefaultDispatcher-worker-2
2018-12-24 01:32:38.895 I/System.out: Start response.readText on DefaultDispatcher-worker-1
2018-12-24 01:32:38.895 I/System.out: Start response.readText on DefaultDispatcher-worker-4
2018-12-24 01:32:40.160 I/System.out: Start response.readText on DefaultDispatcher-worker-1

// skiped 45 logs Start response.readText on ..

2018-12-24 01:33:11.137 I/System.out: End response.readText on DefaultDispatcher-worker-3 // first end readText
2018-12-24 01:33:11.311 I/System.out: Start response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:12.202 I/System.out: Start response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:12.298 I/System.out: Start response.readText on DefaultDispatcher-worker-1
2018-12-24 01:33:12.663 I/System.out: Start response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:12.668 I/System.out: Start response.readText on DefaultDispatcher-worker-1
2018-12-24 01:33:14.052 I/System.out: Start response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:14.091 I/System.out: Start response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:14.238 I/System.out: Start response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:14.313 I/System.out: Start response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:15.475 I/System.out: Start response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:15.486 I/System.out: Start response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:15.576 I/System.out: Start response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:15.646 I/System.out: Start response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:15.746 I/System.out: End response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:15.754 I/System.out: End response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:15.766 I/System.out: End response.readText on DefaultDispatcher-worker-1
2018-12-24 01:33:15.877 I/System.out: End response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:15.914 I/System.out: End response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:15.930 I/System.out: End response.readText on DefaultDispatcher-worker-1
2018-12-24 01:33:15.938 I/System.out: End response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:15.995 I/System.out: End response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:16.051 I/System.out: End response.readText on DefaultDispatcher-worker-1
2018-12-24 01:33:16.101 I/System.out: End response.readText on DefaultDispatcher-worker-2

// skiped many End response.readText on ..

2018-12-24 01:33:16.963 I/System.out: End response.readText on DefaultDispatcher-worker-4
2018-12-24 01:33:16.963 I/System.out: End response.readText on DefaultDispatcher-worker-3
2018-12-24 01:33:16.974 I/System.out: End response.readText on DefaultDispatcher-worker-1
2018-12-24 01:33:16.982 I/System.out: End response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:17.115 I/System.out: Start response.readText on DefaultDispatcher-worker-2
2018-12-24 01:33:17.129 I/System.out: End response.readText on DefaultDispatcher-worker-3 // last end readText`

I think problem in content.readRemaining method.

Maybe related https://github.com/ktorio/ktor/issues/768, https://github.com/ktorio/ktor/issues/770

I am ready to provide more details let me know.

Thanks!

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1266

Ktor Version and Engine Used (client or server and name)
Ktor 1.2.3 embedded Jetty server.

Describe the bug
If server is started with "user-local default: JAR manifest" command line shortener it seems allUrls in ApplicationEngineEnvironmentReloading.kt only has a couple of java jars thus it prints:

2019-08-07 14:11:13,088 INFO  --- [main] Application : No ktor.deployment.watch patterns match classpath entries, automatic reload is not active

To Reproduce
Error is shown on startup with the mentioned shorten command line option.

Expected behavior
Reloading works. It works for us if we use the classpath file shorten command line option. The options are not visible for kotlin run configurations but can be accessed in a Java Application run application (with same options as a Kotlin version.). I think the broken option is the default so it would be much nicer if Ktor worked with that.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1657

Subsystem
Server

Is your feature request related to a problem? Please describe.
We wanted our typed locations to be able to define a permission node / access level. We did this via an additional annotation but then we had to write an interceptor that would get the class annotated with @Location from the request path and check for ours. The problem is that there doesn't seem to be any public access to the mapping done in Locations. Right now we're using a pretty-narly looking reflection solution that's less than ideal.

Describe the solution you'd like
Exposing io.ktor.locations.Locations$LocationInfo and an immutable copy of io.ktor.locations.Locations.info should be enough.

Motivation to include to ktor
I'm sure this could be a beneficial feature to a lot of users, even if it's not implemented in the way described above. It'll allow users to add additional properties to their routes and implement them in interceptors (and elsewhere) without having to do any reflection or map what is already mapped within ktor.locations.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1747

Hi all
I've created the Ktor project in Intellj with Ktor plugin, when running the application it shows the following error message:

020-03-23 20:31:20.192 [main] INFO  Application - No ktor.deployment.watch patterns specified, automatic reload is not active
Exception in thread "main" java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at kotlin.reflect.jvm.internal.calls.CallerImpl$Method.callMethod(CallerImpl.kt:97)
	at kotlin.reflect.jvm.internal.calls.CallerImpl$Method$Static.call(CallerImpl.kt:106)
	at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflection(KCallableImpl.kt:166)
	at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:110)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.callFunctionWithInjection(ApplicationEngineEnvironmentReloading.kt:384)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.executeModuleFunction(ApplicationEngineEnvironmentReloading.kt:330)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.access$executeModuleFunction(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1$$special$$inlined$forEach$lambda$1.invoke(ApplicationEngineEnvironmentReloading.kt:275)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1$$special$$inlined$forEach$lambda$1.invoke(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.avoidingDoubleStartupFor(ApplicationEngineEnvironmentReloading.kt:310)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.access$avoidingDoubleStartupFor(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1.invoke(ApplicationEngineEnvironmentReloading.kt:274)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading$instantiateAndConfigureApplication$1.invoke(ApplicationEngineEnvironmentReloading.kt:33)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.avoidingDoubleStartup(ApplicationEngineEnvironmentReloading.kt:290)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.instantiateAndConfigureApplication(ApplicationEngineEnvironmentReloading.kt:272)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.createApplication(ApplicationEngineEnvironmentReloading.kt:125)
	at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.start(ApplicationEngineEnvironmentReloading.kt:245)

The java version, that is installed on my computer:

openjdk version "1.8.0_242"
OpenJDK Runtime Environment (Zulu 8.44.0.11-CA-linux64) (build 1.8.0_242-b20)
OpenJDK 64-Bit Server VM (Zulu 8.44.0.11-CA-linux64) (build 25.242-b20, mixed mode)

And here in the Application.kt:

fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)

@Suppress("unused") // Referenced in application.conf
@kotlin.jvm.JvmOverloads
fun Application.module(testing: Boolean = false) {
    install(Authentication) {
    }

    install(ContentNegotiation) {
        gson {
        }
    }

    val client = HttpClient() {
        install(JsonFeature) {
            serializer = GsonSerializer()
        }
        install(Logging) {
            level = LogLevel.HEADERS
        }
        BrowserUserAgent() // install default browser-like user-agent
        // install(UserAgent) { agent = "some user agent" }
    }
    runBlocking {
        // Sample for making a HTTP Client request
        /*
        val message = client.post<JsonSampleClass> {
            url("http://127.0.0.1:8080/path/to/endpoint")
            contentType(ContentType.Application.Json)
            body = JsonSampleClass(hello = "world")
        }
        */
    }

    routing {
        get("/") {
            call.respondText("HELLO WORLD!", contentType = ContentType.Text.Plain)
        }

        get("/json/gson") {
            call.respond(mapOf("hello" to "world"))
        }
    }
}

data class JsonSampleClass(val hello: String)

Thanks

I am trying to use both ktor server and client in a single application with coroutine, but I realized it is quite buggy. Here is the minimal example of one of the problems (maybe this is the core problem), the function hangs forever since it can't pass the delay(1000) line, while it works fine if it is delay(100)

Minimal Example:

import io.ktor.client.*
import io.ktor.client.features.*
import io.ktor.client.request.*
import io.ktor.client.statement.*
import io.ktor.server.cio.*
import io.ktor.server.engine.*
import kotlinx.coroutines.*
import org.junit.jupiter.api.Test

internal class KtorBugTest {
    @Test
    fun minimalTest() {
        val server = embeddedServer(
            CIO,
            environment = applicationEngineEnvironment {
                connector {
                    port = 12345
                    host = "127.0.0.1"
                }
            }
        )
        val client = HttpClient(io.ktor.client.engine.cio.CIO)

        runBlocking {
            launch {
                server.start(true)
            }

            println("Launched Server")
            val job = launch {
                val response: HttpResponse = client.get("http://127.0.0.1:12345")
            }
            println("Launched response")
            delay(1000) // works if replaced by delay(100)
            println("Cancel job") // Can't reach here
            job.cancel()
            server.stop(1000, 1000)
        }
    }
}

Ktor 1.5.3 relies on kotlinx-html-jvm:0.7.3, but version 0.7.3 has not been published to any of the public maven repos.

https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreMacOSJava8/22194?

Version 1.5.2
If use HttpClient(CIO) in Kotlin Multiplatform android project
and add to application manifest

    <application
        .....
        android:networkSecurityConfig="@xml/network_security_config"

network_security_config:

<network-security-config>
    <domain-config>
        <domain includeSubdomains="true">google.com</domain>
        <trust-anchors>
            <certificates src="user"/>
            <certificates src="system"/>
        </trust-anchors>
    </domain-config>
</network-security-config>

any request failed with:

2021-03-05 19:28:38.042 27674-27706/action_reports.action.action_reports_test E/AndroidRuntime: FATAL EXCEPTION: DefaultDispatcher-worker-1
    Process: action_reports.action.action_reports_test, PID: 27674
    java.security.cert.CertificateException: Domain specific configurations require that hostname aware checkServerTrusted(X509Certificate[], String, String) is used
        at android.security.net.config.RootTrustManager.checkServerTrusted(RootTrustManager.java:112)
        at io.ktor.network.tls.TLSClientHandshake.handleCertificatesAndKeys(TLSClientHandshake.kt:232)
        at io.ktor.network.tls.TLSClientHandshake$handleCertificatesAndKeys$1.invokeSuspend(Unknown Source:11)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1958

Ktor Version and Engine Used (client or server and name)

JVM Ktor 1.3.1 (which is latest stable ktor-client-websockets version as of writing this), OkHttp engine on both server and client.

Client is on Linux system (not sure if other operating systems behave differently).

To Reproduce
Steps to reproduce the behavior:

1. Connect to the websocket using following client code:

try {
    client.ws("wss://my-websocket.com",) {
        for (frame in incoming) {
            LOGGER.debug("Received $frame")
        }

        val closeReason = closeReason.await()
        LOGGER.debug("Close $closeReason")
    }
} catch (e: Exception) {
    LOGGER.error("Websocket Error", e)
}

2. Send messages periodically from the server (for example one every couple of seconds)
3. Verify that messages are being received (above code prints out "Received" log on every message)
4. Put the computer that hosts the client in sleep mode
5. Wait in sleep mode for about 15 minutes
6. Turn computer back on

Expected behavior

Socket should probably disconnect or at least give some sort of indication that connection has been dropped.

Actual behavior

Socket just hangs. It does not receive any new messages from the server and does not close or error out (no log outputs from the above code).

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/684

My team is trying to move from using OkHttp to using ktor as our HttpClient. We've found this difficult because there doesn't seem to be a way to set the default base url.

If we have the following requests:

https://www.example.com/api/getA/
https://www.example.com/api/getB/
https://www.example.com/api/getC/

It's common practice to have the ability to set the base url for the http client as https://www.example.com/api/, and then only specify the suffix of the path (/getA/, /getB/, /getC/) at the actual request site.

I like the way you can create a defaultRequest when creating the http client with ktor and then intuitively override what's needed at the request site, however this functionality needs to be extended to allow the inclusion of path data in the base url. This functionality is available in OkHttp and also Retrofit. Otherwise it requires significant refactoring in our code-base when switching between environments, as base urls and base paths often change between environments. I imagine this will be a common problem.

If somehow this is already possible, it's not clear that it is, and in which case, this should be documented better.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1994

I'm using ktor 1.3.2 with CIO engine, when I try to send a get request to URL https://1.0.0.1/dns-query?ct=application/dns-json&cd=false&do=false&type=A&name=google.com by the following code:

suspend fun requestJson(hostname: String): DnsResponse {
            HttpClient(CIO) {
                install(JsonFeature) {
                    serializer = KotlinxSerializer()
                }
                install(HttpTimeout)
            }.use {
                return withContext(Dispatchers.IO) {
                    it.get<DnsResponse>("https://1.0.0.1/dns-query?ct=application/dns-json&cd=false&do=false&type=A&name=google.com") {
                        timeout {
                            requestTimeoutMillis = 5000
                        }
                    }
                }
            }
        }

an error occurred with the message Exception in thread "main" io.ktor.client.features.ClientRequestException: Client request(https://1.0.0.1/dns-query?ct=application%2Fdns-json&cd=false&do=false&type=A&name=google.com) invalid: 403 Forbidden, but when I try to access this URL by using a browser or postman or even using the old-school URLConnection in java, it works fine and returns the correct response, for example, the code

val url = URL("https://1.0.0.1/dns-query?ct=application/dns-json&cd=false&do=false&type=A&name=google.com")
    val conn = url.openConnection() as HttpURLConnection
    conn.connect()
    val bf = BufferedReader(InputStreamReader(conn.inputStream))
    var line: String = ""
    while (bf.readLine().let { if (it == null) false else {line += it; true} }) {

    }
    println(line)

will print

{"Status":0,"TC":false,"RD":true,"RA":true,"AD":false,"CD":true,"Question":[{"name":"google.com","type":1}],"Answer":[{"name":"google.com","type":1,"TTL":59,"data":"172.217.5.78"}]}

and everything looks fine

When logging response from. Ktor-client Logging feature with the help of ResponseObserver, the log does not contains the MDC context.
This mean when tracking all logs bound to an MDC context, response content log remains untracked.

This test illustrates the mentioned scenario :

in package [jvmTest]io.ktor.client.features.logging, in file LoggingTest.kt

@Test
    fun loggingWithMDCContextTest(): Unit = runBlocking {
        val messages: MutableList<String> = mutableListOf()
        val testLogger: Logger = object : Logger by LoggerFactory.getLogger("ktor.test") {
            override fun trace(message: String?) = add("TRACE: $message")
            override fun debug(message: String?) = add("DEBUG: $message")
            override fun info(message: String?) = add("INFO: $message")

            private fun add(message: String?) {
                if (message != null) {
                    val mdcText = MDC.getCopyOfContextMap()?.let { mdc ->
                        if (mdc.isNotEmpty()) {
                            mdc.entries.sortedBy { it.key }
                                .joinToString(prefix = " [", postfix = "]") { "${it.key}=${it.value}" }
                        } else {
                            ""
                        }
                    } ?: ""

                    messages.add(message + mdcText)
                }
            }
        }

        val localTestLogger: io.ktor.client.features.logging.Logger = object : io.ktor.client.features.logging.Logger  {
            override fun log(message: String) {
                testLogger.info(message)
            }
        }

        val client: HttpClient =  HttpClient {
            install(Logging) {
                level = LogLevel.ALL
                logger = localTestLogger
                // responseCoroutineContext = MDCContext()  This is to provide CoroutineContext from feature config
            }
        }

        MDC.put("trace_id", "48b49e15-f7c4-4991-9e33-23850a218718")

        val response: String = withContext(MDCContext()) {
            client.get("https://jsonplaceholder.typicode.com/todos/1")
        }

        MDC.clear()

        assertNotNull(messages)

        assertNotNull(response)
    }

Theory : First I suspected that this is because of EmptyCoroutineContext being used in launch, but when I gave MDCContext() from kotlinx-coroutines-slf4j to it, it still didn't work. Now I suspect, it is because function is provided as a predicate. However, I am not too sure about it. Can you help please ?

Change I tested :

scope.launch(feature.coroutineContext) {
    try {
        feature.responseHandler(sideCall.response)
    } catch (_: Throwable) {
    }

    val content = sideCall.response.content
    if (!content.isClosedForRead) {
        content.discard()
    }
}

where ResponseObserver = public class ResponseObserver(private val responseHandler: ResponseHandler, private val coroutineContext: CoroutineContext = EmptyCoroutineContext)

Elements of messages :

INFO: REQUEST: https://jsonplaceholder.typicode.com/todos/1 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: METHOD: HttpMethod(value=GET) [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: COMMON HEADERS [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> Accept: */* [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> Accept-Charset: UTF-8 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: CONTENT HEADERS [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> Content-Length: 0 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY Content-Type: null [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY START [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO:  [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY END [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: RESPONSE: 200  [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: METHOD: HttpMethod(value=GET) [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: FROM: https://jsonplaceholder.typicode.com/todos/1 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: COMMON HEADERS [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> access-control-allow-credentials: true [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> age: 5692 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> alt-svc: h3-27=":443"; ma=86400, h3-28=":443"; ma=86400, h3-29=":443"; ma=86400 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cache-control: max-age=43200 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cf-cache-status: HIT [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cf-ray: 63a05ebc7fdf10f3-CPH [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> cf-request-id: 09381989cb000010f38b157000000001 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> content-type: application/json; charset=utf-8 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> date: Sat, 03 Apr 2021 06:51:43 GMT [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> etag: W/"53-hfEnumeNh6YirfjyjaujcOPPT+s" [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> expires: -1 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> nel: {"max_age":604800,"report_to":"cf-nel"} [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> pragma: no-cache [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> report-to: {"group":"cf-nel","endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report?s=39vBUwnOjgmuV0yQJPiunD1hXHE28ku4%2FDq55GSjP%2B66ufTXnkgV1a%2F2H7DHSc28QRc1OiJA6k%2BKKXceS0z%2BaAFzxTU%2FuDpZCeBrgceQ7gvyxUQ45qbyYIa4sg2x"}],"max_age":604800} [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> server: cloudflare [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> set-cookie: __cfduid=dbe3ed123d14f8db7af7d7697a9f4049f1617432703; expires=Mon, 03-May-21 06:51:43 GMT; path=/; domain=.typicode.com; HttpOnly; SameSite=Lax [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> vary: Origin, Accept-Encoding [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> via: 1.1 vegur [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-content-type-options: nosniff [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-powered-by: Express [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-ratelimit-limit: 1000 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-ratelimit-remaining: 999 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: -> x-ratelimit-reset: 1616387857 [trace_id=48b49e15-f7c4-4991-9e33-23850a218718]
INFO: BODY Content-Type: application/json; charset=utf-8
INFO: BODY START
INFO: {
  "userId": 1,
  "id": 1,
  "title": "delectus aut autem",
  "completed": false
}
INFO: BODY END

I have observed that the CIO WebSockets client is sending out a Sec-WebSocket-Extensions header in the initial handshake even if no extension has been specified. This is causing issues with RFC 6455 compliant servers as (if my understanding is correct) the spec mandates that at least one extension be provided if the header exists (otherwise fail).

https://tools.ietf.org/html/rfc6455#section-9.1
https://tools.ietf.org/html/rfc2616#section-2.1 (ABNF notes)

I am not familiar enough with the Ktor code to submit a PR with a fix, but as a workaround a simple plugin can be used to strip the header from the request before sending it to the server:

import io.ktor.client.*
import io.ktor.client.features.*
import io.ktor.client.request.*
import io.ktor.http.*
import io.ktor.util.*

/**
 * Intercept outgoing HTTP requests to strip the `Sec-WebSocket-Extensions` header if it is empty.
 *
 * This feature should be installed after the `WebSockets` feature has been installed.
 */
internal class StripBlankSWSEHeader {
    private fun stripHeader(context: HttpRequestBuilder) {
        if (HttpHeaders.SecWebSocketExtensions in context.headers
                && context.headers[HttpHeaders.SecWebSocketExtensions]?.isBlank() == true) {
            context.headers.remove(HttpHeaders.SecWebSocketExtensions)
        }
    }

    class EmptyConfig

    internal companion object Feature : HttpClientFeature<EmptyConfig, StripBlankSWSEHeader> {
        override val key: AttributeKey<StripBlankSWSEHeader> = AttributeKey("StripEmptyWSExtensionHeader")

        override fun prepare(block: EmptyConfig.() -> Unit): StripBlankSWSEHeader {
            return StripBlankSWSEHeader()
        }

        override fun install(feature: StripBlankSWSEHeader, scope: HttpClient) {
            scope.requestPipeline.intercept(HttpRequestPipeline.Render) {
                feature.stripHeader(context)

                proceed()
            }
        }
    }
}

In the client configuration the StripBlankSWSEHeader feature must be registered AFTER the WebSockets feature:

install(WebSockets)
install(StripBlankSWSEHeader) // must be registered AFTER WebSockets feature

After updating to 1.5.2 Android target doest work. But it is ok for iOS
at 1.4.3 is ok for both platforms iOS and Android.

MockEngine {
  // this code is not called on request as result mock doesn't work
}

After updating from ktor 1.4.3 to 1.5.2 and running my integration tests using ktor I'm running into:

java.lang.IllegalStateException: No instance for key AttributeKey: ExpectSuccessAttribyteKey
	at io.ktor.util.Attributes$DefaultImpls.get(Attributes.kt:29)
	at io.ktor.util.AttributesJvmBase.get(AttributesJvm.kt:15)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invokeSuspend(DefaultResponseValidation.kt:28)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invoke(DefaultResponseValidation.kt)
	at io.ktor.client.features.HttpCallValidator.validateResponse(HttpCallValidator.kt:55)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invokeSuspend(HttpCallValidator.kt:134)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invoke(HttpCallValidator.kt)
	at io.ktor.client.features.HttpSend$Feature$install$1.invokeSuspend(HttpSend.kt:98)
	at ???(Coroutine boundary.?(?)
	at app.becoach.roboter.CoacheeRoboter$login$1.invokeSuspend(CoacheeRoboter.kt:26)
Caused by: java.lang.IllegalStateException: No instance for key AttributeKey: ExpectSuccessAttribyteKey
	at io.ktor.util.Attributes$DefaultImpls.get(Attributes.kt:29)
	at io.ktor.util.AttributesJvmBase.get(AttributesJvm.kt:15)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invokeSuspend(DefaultResponseValidation.kt:28)
	at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invoke(DefaultResponseValidation.kt)
	at io.ktor.client.features.HttpCallValidator.validateResponse(HttpCallValidator.kt:55)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invokeSuspend(HttpCallValidator.kt:134)
	at io.ktor.client.features.HttpCallValidator$Companion$install$3.invoke(HttpCallValidator.kt)
	at io.ktor.client.features.HttpSend$Feature$install$1.invokeSuspend(HttpSend.kt:98)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

Do you happen to have any idea what's causing this? My unit tests are getting 4xx error codes from the backend. I've got a custom Feature installed where upon unauthorized error codes, I'm re-issuing a new token.

My feature looks like this:

internal class AuthFeature(
  private val credentials: String,
  private val tokenStorage: TokenStorage,
  private val logger: Logger
) {
  class Config {
    lateinit var credentials: String
    lateinit var tokenStorage: TokenStorage
    lateinit var logger: Logger
  }

  companion object Feature : HttpClientFeature<Config, AuthFeature> {
    override val key: AttributeKey<AuthFeature> = AttributeKey("AuthFeature")

    /**
     * The Mutex is required in order to only refresh once when multiple requests
     * are being triggered simultaneously e.g. at app startup.
     */
    private val mutex = Mutex()

    override fun prepare(block: Config.() -> Unit): AuthFeature {
      val config = Config().apply(block)
      return AuthFeature(
          credentials = config.credentials,
          tokenStorage = config.tokenStorage,
          logger = config.logger,
      )
    }

    @KtorExperimentalAPI
    override fun install(feature: AuthFeature, scope: HttpClient) {
      scope.requestPipeline.intercept(HttpRequestPipeline.State) {
        val accessToken = feature.tokenStorage.getAccessToken()
        val isRefreshingToken = context.url.buildString().endsWith("oauth/token")
        val header = if (accessToken != null && !isRefreshingToken) "Bearer $accessToken" else feature.credentials
        context.headers.append(HttpHeaders.Authorization, header)
      }

      requireNotNull(scope.feature(HttpSend)).intercept { call, _ ->
        if (call.response.status == HttpStatusCode.Unauthorized) {
          val mutexId = uuid4().toString()
          val tag = "${key.name}-$mutexId"
          feature.logger.i(tag, "Got ${HttpStatusCode.Unauthorized.value}")

          val beforeMutexAccessToken = feature.tokenStorage.getAccessToken()
          val request = call.request

          mutex.withLock {
            val inMutexAccessToken = feature.tokenStorage.getAccessToken()
            val needsToRefresh = beforeMutexAccessToken == inMutexAccessToken

            if (needsToRefresh) {
              feature.tokenStorage.putAccessToken(null) // Invalidate access token.
            }

            val refreshToken = feature.tokenStorage.getRefreshToken()

            if (refreshToken != null) {
              if (needsToRefresh) {
                feature.logger.i(tag, "Issuing new access token")
                val refreshResponse = scope.refreshToken(refreshToken)
                feature.logger.i(tag, "Updating access & refresh token")

                feature.tokenStorage.putAccessToken(refreshResponse.accessToken)
                feature.tokenStorage.putRefreshToken(refreshResponse.refreshToken)
              } else {
                feature.logger.i(tag, "Other request already refreshed token")
              }

              // Build previous request once again.
              val requestBuilder = HttpRequestBuilder()
              requestBuilder.takeFrom(request)

              // Force the new token by explicitly setting it.
              requestBuilder.headers[HttpHeaders.Authorization] = "Bearer ${feature.tokenStorage.getAccessToken()}"

              feature.logger.i(tag, "Retrying previous request with new access token")
              execute(requestBuilder).also {
                feature.logger.i(tag, "Finished previous request")
              }
            } else {
              feature.logger.i(tag, "No refresh token and hence leaving as is")
              call
            }
          }
        } else {
          call
        }
      }
    }
  }
}

Test history: https://ktor.beta.teamcity.com/test/451494659026389538?currentProjectId=Ktor_ProjectKtorCore&branch=&orderBy=status&order=desc&expandedTest=id%3A23376%2Cbuild%3A(id%3A24241)

java.net.SocketException: Connection reset by peer
  at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
  at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:715)
  at io.ktor.network.sockets.SocketImpl.connect$ktor_network(SocketImpl.kt:38)
  at io.ktor.network.sockets.SocketImpl$connect$1.invokeSuspend(SocketImpl.kt)
  at    (Coroutine boundary. ( )
  at kotlinx.coroutines.CompletableDeferredImpl.await(CompletableDeferred.kt:86)

I'm using Ktor client with an MPP project.

After upgrading to 1.5.2, I started having this error on a yarn project that is using my js module as a javascript dependency:

./node_modules/mp-game-clib/mp-game-clib.js
Module not found: Can't resolve 'node-fetch' in '/Users/brunomed/git/pok-p2p-game-demo/react-app/node_modules/mp-game-clib'

That's the relevant Gradle config for the library project:

    js(IR) {
        useCommonJs()
        browser {
            binaries.library()
            webpackTask {
                enabled = false
            }
            testTask {
                useKarma {
                    useChromeHeadless()
                    webpackConfig.cssSupport.enabled = true
                }
            }
        }
    }
    ...
    }
    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation(project(":client-server"))
                implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.1.0")

                implementation("io.ktor:ktor-client-core:$ktorVersion")
                implementation("io.ktor:ktor-client-websockets:$ktorVersion")
                implementation("com.benasher44:uuid:0.2.3")

                // https://youtrack.jetbrains.com/issue/KTOR-541
                runtimeOnly(npm("text-encoding", "0.7.0"))
                runtimeOnly(npm("abort-controller", "3.0.0"))
                runtimeOnly(npm("node-fetch", "2.6.1"))                           <== Had to add this to fix the problem for now, I didn't need it with Ktor 1.5.1 
            }
        }
    ...
    }

Not sure if I'm doing something wrong here, but adding those npm dependencies is the only way I could find to produce correct package.json on the jsBrowserProductionLibraryDistribution goal (previous comment here: https://youtrack.jetbrains.com/issue/KTOR-541#focus=Comments-27-4731438.0-0)

Ktor 1.5.0
I am using CIO Engine which has a default timeout of 15000 milliseconds, however, I changed the timeout for a particular request using the HttpRequestBuilder.timeout extension function, but I still get ConnectTimeoutException after 15000 milliseconds.

Gradle:

dependencies {
    ....
   def ktorVersion = "1.5.0"
    implementation "io.ktor:ktor-client-core:$ktorVersion"
    implementation "io.ktor:ktor-client-cio:$ktorVersion"
    implementation "io.ktor:ktor-client-serialization:$ktorVersion"
    implementation "io.ktor:ktor-client-logging-jvm:$ktorVersion"
    ....
}

HttpClient:

HttpClient(CIO) {
    defaultRequest {
        host = HOST
        header("Content-Type", "application/json")
    }

    Logging {
        logger = object : Logger {
            override fun log(message: String) {
                Timber.i(message)
            }
        }
        level = LogLevel.ALL
    }
    install(HttpTimeout)
}

Request:

httpClient.post("${HOST_URL}/users/new") {
     timeout {
         requestTimeoutMillis = 30000
     }
     body = requestBody
}

STR: perform http GET with ktor Apache client to a resource which replies with truncated content

AR:

kotlinx.coroutines.JobCancellationException: Parent job is Cancelling; job=JobImpl{Cancelled}@eb5ab92
	at kotlinx.coroutines.JobSupport.getChildJobCancellationCause(JobSupport.kt:711)
	at kotlinx.coroutines.JobSupport.createCauseException(JobSupport.kt:717)
	at kotlinx.coroutines.JobSupport.cancelMakeCompleting(JobSupport.kt:692)
	at kotlinx.coroutines.JobSupport.cancelImpl$kotlinx_coroutines_core(JobSupport.kt:664)
	at kotlinx.coroutines.JobSupport.parentCancelled(JobSupport.kt:634)
	at kotlinx.coroutines.ChildHandleNode.invoke(JobSupport.kt:1465)
	at kotlinx.coroutines.JobSupport.notifyCancelling(JobSupport.kt:1500)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:897)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:860)
	at kotlinx.coroutines.JobSupport.cancelMakeCompleting(JobSupport.kt:693)
	at kotlinx.coroutines.JobSupport.cancelImpl$kotlinx_coroutines_core(JobSupport.kt:664)
	at kotlinx.coroutines.JobSupport.childCancelled(JobSupport.kt:648)
	at kotlinx.coroutines.ChildHandleNode.childCancelled(JobSupport.kt:1466)
	at kotlinx.coroutines.JobSupport.cancelParent(JobSupport.kt:358)
	at kotlinx.coroutines.JobSupport.notifyCancelling(JobSupport.kt:332)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:897)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:860)
	at kotlinx.coroutines.JobSupport.makeCompleting$kotlinx_coroutines_core(JobSupport.kt:803)
	at kotlinx.coroutines.JobImpl.completeExceptionally(JobSupport.kt:1326)
	at io.ktor.client.engine.apache.ApacheRequestProducer.failed(ApacheRequestProducer.kt:72)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.executionFailed(DefaultClientExchangeHandlerImpl.java:98)
	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.failed(AbstractClientExchangeHandler.java:426)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.exception(HttpAsyncRequestExecutor.java:163)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:276)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39)
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
	... 1 more
Caused by: org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 178; received: 0)
	at org.apache.http.impl.nio.codecs.LengthDelimitedDecoder.read(LengthDelimitedDecoder.java:89)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:52)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:18)
	at io.ktor.utils.io.ByteBufferChannel.writeAvailable(ByteBufferChannel.kt:1631)
	at io.ktor.utils.io.ByteWriteChannel$DefaultImpls.writeAvailable$default(ByteWriteChannel.kt:85)
	at io.ktor.client.engine.apache.ApacheResponseConsumer.consumeContent(ApacheResponseConsumer.kt:51)
	at org.apache.http.impl.nio.client.MainClientExec.consumeContent(MainClientExec.java:329)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.consumeContent(DefaultClientExchangeHandlerImpl.java:157)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:336)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265)
	... 10 more

ER: ConnectionClosedException is not masked

org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 178; received: 0)
	at org.apache.http.impl.nio.codecs.LengthDelimitedDecoder.read(LengthDelimitedDecoder.java:89)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:52)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:18)
	at io.ktor.utils.io.ByteBufferChannel.writeAvailable(ByteBufferChannel.kt:1631)
	at io.ktor.utils.io.ByteWriteChannel$DefaultImpls.writeAvailable$default(ByteWriteChannel.kt:85)
	at io.ktor.client.engine.apache.ApacheResponseConsumer.consumeContent(ApacheResponseConsumer.kt:51)
	at org.apache.http.impl.nio.client.MainClientExec.consumeContent(MainClientExec.java:329)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.consumeContent(DefaultClientExchangeHandlerImpl.java:157)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:336)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265)

https://github.com/ktorio/ktor/blob/master/ktor-client/ktor-client-features/ktor-client-auth/common/src/io/ktor/client/features/auth/Auth.kt#L39
—> I implemented the auth feature using 90% of the code from your example.

At this moment:

scope.feature(HttpSend)!!.intercept { origin, context ->
    println("foo bar") // never happened
}

CIO: last working version is 1.4.3,
Apache, Jetty: work with any ktor version,
OkHttp doesn't work even with 1.4.3.

No special logic, the example above is enough to reproduce.
The block inside intercept {} is just not called.

Assume you want to query data from an API that responds with the following payload if everything works well, while the data field is generic but should never be null.

data class Response<T: Any>(val message: String, val data: T)

If now something goes wrong and the API returns a JSON such as:

{"message":"error", "data": null}

Then the payload.data will be null...

val response = httpClient.get<HttpResponse>("some-endpoint")
val payload: Response<ExpectedDataType> = response.receive()

I do not know how this can happen but it does and leads to very unexpected NullPointerExceptions. I would expect that parsing would fail if the object of the specified type can not be constructed. I would highly encourage some feedback on this issue :-)

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1137

Ktor application can't be compiled with JDK >=9. I'm getting a lot of such errors:

error: module kotlinx.io.jvm reads package io.ktor.http from both ktor.server.core and ktor.http.jvm
error: module kotlinx.io.jvm reads package io.ktor.http.content from both ktor.server.core and ktor.http.jvm
error: module kotlinx.io.jvm reads package io.ktor.util from both ktor.server.core and ktor.utils.jvm
error: module kotlinx.coroutines.jdk8 reads package io.ktor.http from both ktor.server.core and ktor.http.jvm
error: module kotlinx.coroutines.jdk8 reads package io.ktor.http.content from both ktor.server.core and ktor.http.jvm
error: module kotlinx.coroutines.jdk8 reads package io.ktor.util from both ktor.server.core and ktor.utils.jvm
error: module kotlinx.coroutines.core reads package io.ktor.http from both ktor.server.core and ktor.http.jvm
error: module kotlinx.coroutines.core reads package io.ktor.http.content from both ktor.server.core and ktor.http.jvm
error: module kotlinx.coroutines.core reads package io.ktor.util from both ktor.server.core and ktor.utils.jvm
...................

Support of Java 8 ends quite soon, so it makes sense to start supporting Jigsaw. IMHO, this should be prioritized, as it will require breaking backward compatibility. The less Ktor is popular, the easier would be to break backward compatibility. And Ktor will definitely become more popular over time.

Ktor Version

1.2.0

JVM Version, Operating System and Relevant Context

JDK 12

Hi,

It seems that there are performance issues with the current implementation of TCP socket write and also with reading files. Attaching the performance comparison for ktor IO vs regular JVM raw IO:

Files:
--------------------------------------------------------------------
Ktor channel read (128MiB), 20 iterations
Avg: 1239.65ms Min: 1095ms, Max: 1723ms
Raw: 1095, 1104, 1113, 1113, 1113, 1122, 1123, 1126, 1151, 1184, 1249, 1251, 1254, 1254, 1278, 1314, 1351, 1399, 1476, 1723

--------------------------------------------------------------------
Random File Read (128MiB), 20 iterations
Avg: 75.4ms Min: 65ms, Max: 161ms
Raw: 65, 65, 66, 67, 67, 67, 67, 68, 68, 68, 68, 69, 69, 70, 70, 75, 79, 83, 96, 161

--------------------------------------------------------------------
Stream Read (128MiB), 20 iterations
Avg: 58.5ms Min: 56ms, Max: 69ms
Raw: 56, 56, 57, 57, 57, 57, 57, 57, 57, 57, 57, 58, 58, 59, 59, 59, 59, 59, 65, 69


Sockets:
--------------------------------------------------------------------
JVM socket write (128MiB), 20 iterations
Avg: 87.7ms Min: 79ms, Max: 112ms
Raw: 79, 81, 81, 82, 82, 82, 83, 83, 84, 84, 84, 86, 87, 90, 90, 91, 92, 96, 105, 112

--------------------------------------------------------------------
Ktor socket write (128MiB), 20 iterations
Avg: 675.3ms Min: 572ms, Max: 968ms
Raw: 572, 582, 583, 589, 598, 612, 633, 636, 651, 676, 682, 683, 686, 688, 689, 702, 727, 763, 786, 968

You can reproduce the performance measurements with the following tests:
https://gist.github.com/Malinskiy/2dbe05a38321417fd4f23e1872593806
https://gist.github.com/Malinskiy/0172b369040cabc074ccfea9a787a79c

This is the result of an investigation of the issue raised here https://github.com/Malinskiy/marathon/issues/462

Cheers,
Anton

The function channel.readRemaining sometimes returns a packet (possibly the empty one) when the channel is closed abnormally.

Changelog https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.4.3

The list contains TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 here :
https://github.com/ktorio/ktor/blob/master/ktor-network/ktor-network-tls/common/src/io/ktor/network/tls/CipherSuites.kt#L144-L152

but it is ignored by isSupported method here :
https://github.com/ktorio/ktor/blob/master/ktor-network/ktor-network-tls/jvm/src/io/ktor/network/tls/CipherSuitesJvm.kt#L9-L12

which makes these cipher suites unavailable to be used because of :
https://github.com/ktorio/ktor/blob/master/ktor-network/ktor-network-tls/jvm/src/io/ktor/network/tls/TLSHandshakeType.kt#L70

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/893

When configuring a very very long session duration it may cause integer overflow. It need to be decided what should be done in this case:

• fail at attempt to set duration
• bump max-age to Int.MAX_VALUE or Long.MAX_VALUE (long type requires changes, probably breaking changes)

This is related to #892.

The wait parameter of the start method states that

wait - if true, this function does not exit until application engine stops and exits

Mentioned here: https://api.ktor.io/1.5.2/io.ktor.server.engine/-application-engine/start.html

Does it mean when wait is false, the method will exit before the ApplicationEngine stops. Would this mean it only handles the first request made to it?

This issue was imported from GitHub issue: https://github.com/ktorio/ktorio.github.io/issues/268

https://ktor.io/clients/http-client/features/timeout.html

The Client Timeout Feature states that "By default all these timeouts are infinite"; this doesn't seem to be the case with either the Apache or CIO engines where unless I explicitly set a timeout I get:

Apache

io.ktor.network.sockets.SocketTimeoutException: Socket timeout has been expired [url=http://localhost:1080/api/import/tickets/v1/file, socket_timeout=unknown] ms
	at io.ktor.client.features.HttpTimeoutKt.SocketTimeoutException(HttpTimeout.kt:170)
	at io.ktor.client.engine.apache.ApacheHttpRequestKt$sendRequest$$inlined$suspendCancellableCoroutine$lambda$2.failed(ApacheHttpRequest.kt:44)
	at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:137)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.executionFailed(DefaultClientExchangeHandlerImpl.java:101)
	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.failed(AbstractClientExchangeHandler.java:426)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.timeout(HttpAsyncRequestExecutor.java:387)
	at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:92)
	at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:39)
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.timeout(AbstractIODispatch.java:175)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.sessionTimedOut(BaseIOReactor.java:261)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.timeoutCheck(AbstractIOReactor.java:502)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.validate(BaseIOReactor.java:211)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.net.SocketTimeoutException: 10,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE]
	... 11 common frames omitted

CIO (which doesn't seem to accept specifying timeouts at all)

kotlinx.coroutines.TimeoutCancellationException: Timed out waiting for 15000 ms
	at kotlinx.coroutines.TimeoutKt.TimeoutCancellationException(Timeout.kt:149)
	at kotlinx.coroutines.TimeoutCoroutine.run(Timeout.kt:119)
	at kotlinx.coroutines.EventLoopImplBase$DelayedRunnableTask.run(EventLoop.common.kt:493)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:272)
	at kotlinx.coroutines.DefaultExecutor.run(DefaultExecutor.kt:68)
	at java.base/java.lang.Thread.run(Thread.java:834)

It would be good to have some docs on how to deploy using TomCat, and also how to configure SSL and also to have app run off of sub-route (i.e. https://domain.com/my-app-route)

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1950

Ktor Version and Engine Used (client or server and name)
https://ktor.io/quickstart/quickstart/gradle.html#intellij-improve-the-app-with-the-application-object

Describe the bug
Ktor is currently at version 1.3.2, but in the quickstart docs it is mentioned that is not yet 1.0. Referenced line is: "Since Ktor is not yet 1.0, we have custom Maven repositories for distributing our early preview artifacts."

Expected behavior
Line should be corrected.

In https://ktor.io/docs/features-auth.html:

We should add support for bearer token authorization; it's the most common one in APIs for apps

Should cover multiplatform scenarios also

https://ktor.io/docs/http-client-testing.html

Code sample probably is using an old version of the API:
request.url.fullUrl -> request.url.toString()

https://ktor.io/docs/docker.html

The example does not work and is outdated.

It seems that the search functionality doesn't work in the docs.

Chrome Version 88.0.4324.192, macOS.

Adding "Gson" and "Kotlinx.Serialization" dependencies in the same wizard project generates the following code:

install(ContentNegotiation) {
    gson {
    }
}
install(ContentNegotiation) {
    json()
}

// . . .

routing {
    get("/json/gson") {
        call.respond(mapOf("hello" to "world"))
    }
}
routing {
    get("/json/kotlinx-serialization") {
        call.respond(mapOf("hello" to "world"))
    }
}

This (expectedly) crashes at first run:

Exception in thread "main" java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)

Caused by: io.ktor.application.DuplicateApplicationFeatureException: Conflicting application feature is already installed with the same key as `ContentNegotiation`
	at io.ktor.application.ApplicationFeatureKt.install(ApplicationFeature.kt:82)
	at com.example.ApplicationKt.module(Application.kt:27)
	at com.example.ApplicationKt.module$default(Application.kt:21)

Should be: Gradle Kotlin, Gradle Groovy, Maven

When declaring a dependency on Ktor io.ktor:ktor-network and io.ktor:ktor-client-ios, this leads to a compiler error on iosArm64. Tested using kotlin 1.4.31 and ktor 1.5.2

I created a minimal reproducer here:
https://github.com/PaulWoitaschek/KtorSocketBug

To reproduce it, run ./gradlew linkDebugFrameworkIosArm64

> Task :linkDebugFrameworkIosArm64 FAILED
e: Compilation failed: Unbound symbols not allowed

Unbound public symbol for public io.ktor.network.sockets/SocketTimeoutException.<init>|-4324620762574333298[0] public io.ktor.network.sockets/SocketTimeoutException.<init>|-4324620762574333298[0]

 * Source files: 
 * Compiler version info: Konan: 1.4.31 / Kotlin: 1.4.31
 * Output kind: FRAMEWORK

e: java.lang.AssertionError: Unbound symbols not allowed

Unbound public symbol for public io.ktor.network.sockets/SocketTimeoutException.<init>|-4324620762574333298[0] public io.ktor.network.sockets/SocketTimeoutException.<init>|-4324620762574333298[0]
        at org.jetbrains.kotlin.ir.util.SymbolTableKt.noUnboundLeft(SymbolTable.kt:1119)
        at org.jetbrains.kotlin.psi2ir.Psi2IrTranslator.generateModuleFragment(Psi2IrTranslator.kt:89)
        at org.jetbrains.kotlin.backend.konan.PsiToIrKt.psiToIr(PsiToIr.kt:160)
        at org.jetbrains.kotlin.backend.konan.ToplevelPhasesKt$psiToIrPhase$1.invoke(ToplevelPhases.kt:135)
        at org.jetbrains.kotlin.backend.konan.ToplevelPhasesKt$psiToIrPhase$1.invoke(ToplevelPhases.kt)
        at org.jetbrains.kotlin.backend.common.phaser.PhaseBuildersKt$namedOpUnitPhase$1.invoke(PhaseBuilders.kt:97)
        at org.jetbrains.kotlin.backend.common.phaser.PhaseBuildersKt$namedOpUnitPhase$1.invoke(PhaseBuilders.kt:95)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:94)
        at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:30)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:94)
        at org.jetbrains.kotlin.backend.common.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:41)
        at org.jetbrains.kotlin.backend.konan.KonanDriverKt.runTopLevelPhases(KonanDriver.kt:29)
        at org.jetbrains.kotlin.cli.bc.K2Native.doExecute(K2Native.kt:78)
        at org.jetbrains.kotlin.cli.bc.K2Native.doExecute(K2Native.kt:35)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:88)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:44)
        at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:98)
        at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:76)
        at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:45)
        at org.jetbrains.kotlin.cli.common.CLITool$Companion.doMainNoExit(CLITool.kt:227)
        at org.jetbrains.kotlin.cli.bc.K2Native$Companion$mainNoExitWithGradleRenderer$1.invoke(K2Native.kt:286)
        at org.jetbrains.kotlin.cli.bc.K2Native$Companion$mainNoExitWithGradleRenderer$1.invoke(K2Native.kt:270)
        at org.jetbrains.kotlin.util.UtilKt.profileIf(Util.kt:27)
        at org.jetbrains.kotlin.util.UtilKt.profile(Util.kt:21)
        at org.jetbrains.kotlin.cli.bc.K2Native$Companion.mainNoExitWithGradleRenderer(K2Native.kt:285)
        at org.jetbrains.kotlin.cli.bc.K2NativeKt.mainNoExitWithGradleRenderer(K2Native.kt:485)
        at org.jetbrains.kotlin.cli.utilities.MainKt$daemonMain$1.invoke(main.kt:43)
        at org.jetbrains.kotlin.cli.utilities.MainKt$daemonMain$1.invoke(main.kt)
        at org.jetbrains.kotlin.cli.utilities.MainKt.mainImpl(main.kt:17)
        at org.jetbrains.kotlin.cli.utilities.MainKt.daemonMain(main.kt:43)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.jetbrains.kotlin.compilerRunner.KotlinToolRunner.runInProcess(KotlinToolRunner.kt:124)
        at org.jetbrains.kotlin.compilerRunner.KotlinToolRunner.run(KotlinToolRunner.kt:73)
        at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinNativeCompile.compile(KotlinNativeTasks.kt:334)
        at org.jetbrains.kotlin.gradle.tasks.KotlinNativeLink.compile(KotlinNativeTasks.kt:657)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:104)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:58)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:51)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:29)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.run(ExecuteActionsTaskExecuter.java:494)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:56)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$run$1(DefaultBuildOperationExecutor.java:71)
        at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.runWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:45)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:71)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:479)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:462)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$400(ExecuteActionsTaskExecuter.java:105)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.executeWithPreviousOutputFiles(ExecuteActionsTaskExecuter.java:273)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:251)
        at org.gradle.internal.execution.steps.ExecuteStep.lambda$executeOperation$1(ExecuteStep.java:66)
        at java.base/java.util.Optional.orElseGet(Optional.java:362)
        at org.gradle.internal.execution.steps.ExecuteStep.executeOperation(ExecuteStep.java:66)
        at org.gradle.internal.execution.steps.ExecuteStep.access$000(ExecuteStep.java:34)
        at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:47)
        at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:44)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:76)
        at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76)
        at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:44)
        at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:34)
        at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:72)
        at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:42)
        at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:53)
        at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:39)
        at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:44)
        at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:77)
        at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:58)
        at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:54)
        at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:32)
        at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:57)
        at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:38)
        at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:63)
        at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:30)
        at org.gradle.internal.execution.steps.BuildCacheStep.executeWithoutCache(BuildCacheStep.java:176)
        at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:76)
        at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:47)
        at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:43)
        at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:32)
        at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:39)
        at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:25)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:102)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:95)
        at java.base/java.util.Optional.map(Optional.java:258)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:55)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:39)
        at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:83)
        at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:44)
        at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:37)
        at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:27)
        at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:96)
        at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:52)
        at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:83)
        at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:54)
        at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:74)
        at org.gradle.internal.execution.steps.SkipEmptyWorkStep.lambda$execute$2(SkipEmptyWorkStep.java:88)
        at java.base/java.util.Optional.orElseGet(Optional.java:362)
        at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:88)
        at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:34)
        at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsStartedStep.execute(MarkSnapshottingInputsStartedStep.java:38)
        at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:46)
        at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:34)
        at org.gradle.internal.execution.steps.AssignWorkspaceStep.lambda$execute$0(AssignWorkspaceStep.java:43)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution$3.withWorkspace(ExecuteActionsTaskExecuter.java:286)
        at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:43)
        at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:33)
        at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:40)
        at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:30)
        at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:54)
        at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:40)
        at org.gradle.internal.execution.impl.DefaultExecutionEngine.execute(DefaultExecutionEngine.java:41)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:183)
        at java.base/java.util.Optional.orElseGet(Optional.java:362)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:183)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:173)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:109)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:76)
        at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
        at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:41)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:411)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:398)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:391)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:377)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:127)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:191)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:182)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:124)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
        at java.base/java.lang.Thread.run(Thread.java:832)


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':linkDebugFrameworkIosArm64'.
> Compilation finished with errors

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 11s
2 actionable tasks: 2 executed

The 1.5.x update broke the auto-reload feature.
I made an example repo here, when switching from 1.4.x to 1.5.x the auto-reload break (not working anymore).
You can reproduce by running ./gradlew run and ./gradlew build -t and switch versions.

Autoreload was broken in 1.5.0 (KTOR-1184) when using embeddedServer with module specified as a parameter.

For example:

embeddedServer(Jetty, 8080, module = Application::main, watchPaths = listOf(File(".").canonicalPath))

I have ./gradlew -t classes rebuilding changes. Ktor notices changed classes ("INFO ktor.application - Changes in application detected.") and reloads the application, but is using old classes. Dropping the watchPaths parameter doesn't make a difference. Autoreload works with the same code using Ktor 1.4.3.

Another workaround is to configure the module as if using application.conf:

val environment = applicationEngineEnvironment {
  this.config = MapApplicationConfig().apply { put("ktor.application.modules", listOf("path.to.module")) }
}
embeddedServer(Jetty, environment)

These tests were done using version 1.5.2.

Current:

plugins {
    application
    kotlin("jvm") version "1.4.10"
    id("org.jetbrains.kotlin.plugin.serialization") version "1.4.10"
}

Should be:

plugins {
    application
    kotlin("jvm") version "1.4.10"
    kotlin("plugin.serialization") version "1.4.30"
}

Reproduced while running from sources after the creation of the new project (not the ktor one) from the wizard and closing all of the projects

Design is here: https://youtrack.jetbrains.com/issue/KTOR-1917

Run Ktor app:

import io.ktor.application.*
import io.ktor.routing.*
import io.ktor.server.engine.*
import io.ktor.server.netty.*

fun main(args: Array<String>): Unit = EngineMain.main(args)

@Suppress("unused") // Referenced in application.conf
@JvmOverloads
fun Application.module(testing: Boolean = false) {
    embeddedServer(Netty, host = "127.0.0.1", port = 8000) {
        routing {
            get("/hello") {
                TODO()
            }
        }
    }.start(wait = true)
}

Open http://localhost:8080/app

Full stacktrace is shown while we can collapse some framework internal frames by default

Choosing both Routing and Kotlinx.Serialization results in the following snippet:

@kotlin.jvm.JvmOverloads
fun Application.module(testing: Boolean = false) {

    install(ContentNegotiation) {
        json()
    }

    routing {
        get("/") {
            call.respondText("Hello World!")
        }
    }
    routing {
        get("/json/kotlinx-serialization") {
            call.respond(mapOf("hello" to "world"))
        }
    }
}

These two should probably be merged. Otherwise it looks like every route needs to be in its own routing block.

See https://youtrack.jetbrains.com/issue/KTOR-1644

If we're linking to the specific code for a feature on GitHub (which should probably be indicated in the metadata for the feature and only linked if present), it should link to the specific feature. Currently all the ones we ship out of the box point to generic https://github.com/ktorio/ktor

Also, please note the text should say

"Source on GitHub" instead of "See features's GitHub"

Could not find artifact org.jetbrains.kotlin:kotlin-maven-serialization:pom:${kotlin.version} in central (https://repo.maven.apache.org/maven2)

I assume this is the offending block:

<dependency>
    <groupId>org.jetbrains.kotlin</groupId>
    <artifactId>kotlin-maven-serialization</artifactId>
    <version>${kotlin.version}</version>
</dependency>

With a barebones Ktor project as generated by the Wizard, the stubbed-out code snippets in the README.md cause IntelliJ to believe we're committing very faulty software when importing our project into Git (and, likely, other VCS). IJ shows 50+ errors (not warnings).

This looks very scary, and makes it feel like something is broken with the setup even when there isn't. Please either annotate the README with some kind of flag to let IntelliJ know not to check all the code fences, or otherwise exclude the README file from code analysis.

Tested on:

IntelliJ IDEA 2021.1 Beta (Ultimate Edition)
Build #IU-211.6305.21, built on March 4, 2021
IntelliJ IDEA EAP User
Expiration date: April 4, 2021
Runtime version: 11.0.10+9-b1341.18 x86_64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
macOS 10.14.6
GC: G1 Young Generation, G1 Old Generation
Memory: 4096M
Cores: 8
Registry: ide.images.show.chessboard=true
Non-Bundled Plugins: com.jetbrains.darkPurpleTheme (1.2), org.nik.presentation-assistant (1.0.9), wu.seal.tool.jsontokotlin (3.6.1), org.asciidoctor.intellij.asciidoc (0.32.26), stardust (1.5.2105), com.jetbrains.intellij.api.watcher (6.46.0), intellij.ktor (1.5.1-eap-1)
Kotlin: 211-1.4.21-release-IJ6305.1

The feature generates the following code in resources/static/index.html:

<html>
<head>
</head>
<body>
<h1>Hello Ktor!<h1>
</body>
</html>

As IntelliJ IDEA notes correctly, the h1 tag is not being closed properly. Should be </h1>.

plugins {
    id 'application'
    id 'org.jetbrains.kotlin.jvm' version '1.4.10'
    id "org.jetbrains.kotlin.plugin.serialization" version "1.4.10" // <== these should probably also be single quotes – no need to switch.
}

import org.jetbrains.kotlin.gradle.dsl.Coroutines
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

If I create a project with ContentNegotiation, Gson, and Routing, I don't get a run configuration automatically configured. I need to press the green gutter play icon, or run the run Gradle task.

Adding a bunch more features seems to sometimes include a default "ApplicationKt" run configuration.

For some reason it also add numerous entries

<repositories>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>jcenter</id>
            <url>https://jcenter.bintray.com</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>ktor</id>
            <url>https://kotlin.bintray.com/ktor</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>

Ktor plugin generates a project with Kotlin 1.4.10, but the latest version is 1.4.31

Occurred 10 times in the last 5 or so minutes, just doing basic scrolling and picking and choosing of features.

java.lang.NoSuchMethodError: 'void org.intellij.plugins.markdown.ui.preview.MarkdownHtmlPanel.render()'
	at io.ktor.initializr.intellij.features.KtorFeatureDetailsPageComponent$showKtorFeature$3$1.run(KtorFeatureDetailsPageComponent.kt:263)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:969)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:839)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:449)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:808)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:781)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:502)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

IntelliJ IDEA 2021.1 Beta (Ultimate Edition)
Build #IU-211.6305.21, built on March 4, 2021
IntelliJ IDEA EAP User
Expiration date: April 4, 2021
Runtime version: 11.0.10+9-b1341.18 x86_64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
macOS 10.14.6
GC: G1 Young Generation, G1 Old Generation
Memory: 4096M
Cores: 8
Registry: ide.images.show.chessboard=true
Non-Bundled Plugins: com.jetbrains.darkPurpleTheme (1.2), org.nik.presentation-assistant (1.0.9), wu.seal.tool.jsontokotlin (3.6.1), org.asciidoctor.intellij.asciidoc (0.32.26), stardust (1.5.2105), com.jetbrains.intellij.api.watcher (6.46.0), intellij.ktor (1.5.1-eap-1)
Kotlin: 211-1.4.21-release-IJ6305.1

In ktor-samples/client-mpp Android Studio doesn't see imported dependencies in the iosMain sourceSet:

MacOS 11.1
Android Studio 4.1.1
XCode 12.3

Error message when trying to build the project iOS configuration of ktor-samples/client-mpp in Android Studio:

/Users/lukaszkalnik/projects/learning/ktor-samples/client-mpp/client-mpp-ios/ViewController.swift:3:8: error: no such module 'client_mpp'
import client_mpp
       ^

MacOS 11.1
Android Studio 4.1.1
XCode 12.3

Android Studio logs attached.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/326

Right now Ktor provides functionality to get an OAuth token, and there is a sample with some providers.
But for authenticating you need to know which principal are you authenticating, so providing functionality to resolve the user's email or id from the token at least for popular providers would be a really nice addition.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1743

Ktor Version and Engine Used (client or server and name)
1.32, server

Describe the bug
Sealed classes are stringified to differently when using kotlinx.serialization through Ktor content negotiation
To Reproduce
Steps to reproduce the behavior:

1. Create class with list:

@Serializable
class SealedList(val list: List<Test>)

@Serializable
sealed class Test {
    @Serializable
    class A() : Test()

    @Serializable
    class B() : Test()
}

2. Setup contentNegotiation:

fun Application.installContentNegotiation() {
    install(ContentNegotiation) {
        json(json = Json(DefaultJsonConfiguration.copy(encodeDefaults = false, prettyPrint = true)))
    }
}

3. Setup routing:

get("testing") {
    val message = SealedList(listOf(Test.A(), Test.B()))
    val json = Json(JsonConfiguration.Default.copy(prettyPrint = true))
    println(json.stringify(SealedList.serializer(), message))
    call.respond(message)
}

4. Test it

startTestServer {
    val call = handleRequest(HttpMethod.Get,"testing") {
        jsonAcceptType()
    }

    println(call.response.content)
}

Expected behavior
Json created "by hand" should be equal to this created by Ktor. Results:

1. By hand:

{
    "list": [
        {
            "type": "navigationData.server.router.Test.A"
        },
        {
            "type": "navigationData.server.router.Test.B"
        }
    ]
}

2 By ktor:

{
    "list": [
        ["navigationData.server.router.Test.A", {
            }
        ],
        ["navigationData.server.router.Test.B", {
            }
        ]
    ]
}

Maybe I didn't understand something, or Ktor needs more data, but I couldn't find it in documentation:
https://ktor.io/servers/features/content-negotiation/serialization-converter.html

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1825

Ktor Version and Engine Used (client or server and name)
ktor 1.3.2 (Netty)

Describe the bug
https://api.ktor.io/1.3.2/io.ktor.request/http-method.html states:

Returns request HTTP method possibly overridden via header X-Http-Method-Override

However it doesn't work. httpMethod() returns POST while headers[" X-Http-Method-Override"] returns GET.

To Reproduce
Execute POST request with X-Http-Method-Override: GET header.

Expected behavior
Returns 'GET' or documentation is not correct.

Screenshots

Is that correct that routing API also ignores X-Http-Method-Override or it's a bug ?

The route handler for /res/{parameter} will now also match for /res/. Before /res and /res/ would match the "getAll" resource.
This means any "trailing" path segment parameter is implicitly treated as optional. So all handlers need to check if the parameter is empty string and then either

1. redirect to /res
2. copy&paste the handler of /res to the empty string code branch
3. give a 404 or 400

I guess "fixing" the behavior of /res == /res/ in 1.5 is opinionated, so there should be a real option/flag to ignore trailing slashes.
Regression starting from 1.5 ( https://youtrack.jetbrains.com/issue/KTOR-372 ), works as expected in 1.4.3

The docs seem to be partially broken now for mandatory path segment parameters.

{param} matches a path segment and captures it as a parameter named param. This path segment is mandatory, but you can make it optional by adding a question mark: {param?}.

Imagine that you have feature X and install it. Now you want to set up the feature config for the specific subroute.
In the current state, there is no generic way to do this. Users can change the config of the feature after install (ex, Authentication feature) but only globally, and to do this, they need to understand how internal systems work.
Also, implementing a new DSL method in routing can break a priority of routes (see https://youtrack.jetbrains.com/issue/KTOR-613)

Suggested solution:

API

Not all the features can be dynamically configured in routing. For example, feature that starts a background process on install should not know anything about routing. To separate them in API we will create the new interface:

public interface RoutingScopedFeature<in TPipeline : Pipeline<*, ApplicationCall>, TConfiguration : Any, TFeature : Any> :
    ApplicationFeature<TPipeline, TConfiguration, TFeature> {

    ... 

    /**
     * Feature installation script
     */
    public fun install(pipeline: TPipeline): TFeature
}

Note that the install function doesn't have a configuration block as a parameter on the installation, because it can be modified in routing.

The new overload for the install function will be introduced

public fun <Config, Feature : RoutingScopedFeature<*, Config, *>> Route.install(
    feature: Feature,
    configBuilder: Config.() -> Unit
)

To receive actual configuration inside the feature, the user will need to use the configurationBlock property inside the interceptor.

pipeline.intercept(phase) {
    val configuration = Configuration().apply(configurationBlock)
    ...
}

Usage example (Authentication feature):

install(Authentication) {
    form { validate { c -> UserIdPrincipal(c.name) } }
}

routing {
    route(...) {
        install(Authentication) {
            form("2") {
                validate { it.name.takeIf { it == "bbb" }?.let { UserIdPrincipal(it) } }
            }
        }
     
        get("/") { }
    }
}   

Implementation

To check full (but draft) implementation with tests and migration of the Authentication feature, please check the rsinukov/feature-config branch.

Migration

We can gradually add dynamic configuration functionality to existing features by changing their base interface from ApplicationFeature to DynamicConfigFeature. The migration of each feature will require minimal efforts (can be seen in the rsinukov/feature-config branch for the Authentication feature).

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1962

Ktor Version and Engine Used (client or server and name)
Server CIO, 1.3.2

Describe the bug
If we don't call call.respond the server freezes and holds the connection with CIO server(without any message)
The Netty treats this sample as correct response and respond with status code Unauthorized

To Reproduce
Make the request with CIO server:

get("unauthorized") {
    call.response.status(HttpStatusCode.Unauthorized)
    call.response.header(HttpHeaders.WWWAuthenticate, "Basic realm=\"TestServer\", charset=UTF-8")
}

Expected behavior
Respond with 5xx Internal server error or a correct response in that case

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1887

Ktor Version and Engine Used (client or server and name)
1.3.2, server/client, CIO engine

Describe the bug
I don't see uninstallFeature function, un-intercepting the pipeline.
Tested with DefaultHeaders and CORS.

To Reproduce
Server code,

fun main() {
    embeddedServer(CIO, host = "localhost", port = 8080) {    
        install(CORS) {
            host("AHost.com")
        }
        
        install(DefaultHeaders)
        
        uninstallAllFeatures() // This is where uninstallFeature will be called
        
        routing {  
            get { 
                call.respond("Hello")
            }
        }
    }.start(wait = true)
}

A client code (typically a simple get request),

fun main() = runBlocking {
    val client = HttpClient(CIO)
    
    client.get<HttpResponse>(port = 8080) {
        
        header(HttpHeaders.Accept, ContentType.Application.Json)
        header(HttpHeaders.Origin, "http://AHost.com")
        
    }.run {
        
        println(headers)
        
    }
    
}

Result,

Headers [Vary=[Origin], Access-Control-Allow-Origin=[http://AHost.com], Date=[Fri, 22 May 2020 00:21:53 GMT], Server=[ktor-server-core/1.3.2 ktor-server-core/1.3.2], Content-Length=[5], Content-Type=[text/plain; charset=UTF-8]]

Expected behavior
Features actually be uninstalled. Meaning they won't intercept the pipeline anymore.

This test passes -- note the ///

    @Test
    internal fun routeSlashes() {
        withTestApplication({
            routing {
                get("/") {
                    call.respond("OK: ${(call as RoutingApplicationCall).route}")
                }
            }
        }) {
            with(handleRequest(HttpMethod.Get, "/")) {
                assertEquals("OK: ///(method:GET)", response.content)
            }
        }
    }

If the route is declared with get(""), Route.toString() results in /(method:GET), which is what I would expect in both cases.

Ktor supports the use of ES256, ES384, and ES512 as JWK algorithm, but the used library jwks-rsa-java doesn't support the key type EC.

This results in an exception InvalidPublicKeyException, when Ktor tries to create the public key. Is there an option/workaround to use EC encryption?

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1656

Ktor Version and Engine Used (client or server and name)
1.3.0

Describe the bug
CORS can't pass on some none standard orgin like chrome-extension://mfgdmpfihlmdekaclngibpjhdebndhdj

To Reproduce
open some new page in chrome or other browser,just call any api,CORS throw would error(brower side).

Expected behavior
should be AnyOrigin pass by CORS, when we config it as host("*") or anyHost()

kotlin: 1.4.20
kotlinx.coroutines: 1.4.2

Sessions feature is configured in a rather standard manner:

        install(Sessions) {
            cookie<UserIdPrincipal>(
                Cookies.SESSION_ID,
                storage = directorySessionStorage(sessionStorageRootDir)
            ) {
                cookie.path = "/"
                cookie.httpOnly = true
                cookie.extensions["SameSite"] = "Lax"
            }
        }

When it is called during a pipeline execution, an unexpected exception is thrown.

java.lang.IllegalStateException: Using blocking primitives on this dispatcher is not allowed. Consider using async channel instead or use blocking primitives in withContext(Dispatchers.IO) instead.
	at io.ktor.utils.io.jvm.javaio.BlockingKt.ensureParkingAllowed(Blocking.kt:302) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.access$ensureParkingAllowed(Blocking.kt:1) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.InputAdapter.<init>(Blocking.kt:30) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream$default(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.DirectoryStorage.read(DirectoryStorage.kt:46) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invokeSuspend(Cache.kt:82) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invoke(Cache.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseCache$getOrCompute$2$1.invokeSuspend(Cache.kt:38) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	(Coroutine boundary) ~[?:?]
	at kotlinx.coroutines.DeferredCoroutine.await$suspendImpl(Builders.common.kt:101) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.sessions.ReferenceCache.getOrCompute$suspendImpl(Cache.kt:86) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage.read(CacheStorage.kt:20) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionTrackerById.load(SessionTrackerById.kt:34) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionsKt.receiveSessionData(Sessions.kt:215) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.Sessions$Feature$install$1.invokeSuspend(Sessions.kt:259) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.ContentNegotiation$Feature$install$1.invokeSuspend(ContentNegotiation.kt:110) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$interceptCall$2.invokeSuspend(StatusPages.kt:102) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages.interceptCall(StatusPages.kt:101) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$Feature$install$2.invokeSuspend(StatusPages.kt:142) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.CallLogging$Feature$install$2.invokeSuspend(CallLogging.kt:139) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invokeSuspend(DefaultEnginePipeline.kt:118) ~[ktor-server-host-common-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invokeSuspend(NettyApplicationCallHandler.kt:118) ~[ktor-server-netty-jvm-1.4.3.jar:1.4.3]
Caused by: java.lang.IllegalStateException: Using blocking primitives on this dispatcher is not allowed. Consider using async channel instead or use blocking primitives in withContext(Dispatchers.IO) instead.
	at io.ktor.utils.io.jvm.javaio.BlockingKt.ensureParkingAllowed(Blocking.kt:302) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.access$ensureParkingAllowed(Blocking.kt:1) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.InputAdapter.<init>(Blocking.kt:30) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.utils.io.jvm.javaio.BlockingKt.toInputStream$default(Blocking.kt:20) ~[ktor-io-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.DirectoryStorage.read(DirectoryStorage.kt:46) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invokeSuspend(CacheStorage.kt:15) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage$referenceCache$1.invoke(CacheStorage.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invokeSuspend(Cache.kt:82) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache$container$1.invoke(Cache.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseCache$getOrCompute$2$1.invokeSuspend(Cache.kt:38) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) ~[kotlin-stdlib-1.4.20.jar:1.4.20-release-308 (1.4.20)]
	at kotlinx.coroutines.internal.DispatchedContinuationKt.resumeCancellableWith(DispatchedContinuation.kt:342) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:30) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable$default(Cancellable.kt:27) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:109) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.async(Builders.common.kt:91) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt.async(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.async$default(Builders.common.kt:84) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt.async$default(Unknown Source) ~[kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.sessions.BaseCache$getOrCompute$2.apply(Cache.kt:37) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseCache$getOrCompute$2.apply(Cache.kt:31) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[?:1.8.0_251]
	at io.ktor.sessions.BaseCache.getOrCompute(Cache.kt:36) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache.getOrCompute$suspendImpl(Cache.kt:86) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.ReferenceCache.getOrCompute(Cache.kt) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.BaseTimeoutCache.getOrCompute(Cache.kt:163) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.CacheStorage.read(CacheStorage.kt:20) ~[ktor-server-sessions-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionTrackerById.load(SessionTrackerById.kt:34) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.SessionsKt.receiveSessionData(Sessions.kt:215) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.Sessions$Feature$install$1.invokeSuspend(Sessions.kt:63) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.sessions.Sessions$Feature$install$1.invoke(Sessions.kt) ~[ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.ContentNegotiation$Feature$install$1.invokeSuspend(ContentNegotiation.kt:110) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.ContentNegotiation$Feature$install$1.invoke(ContentNegotiation.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$interceptCall$2.invokeSuspend(StatusPages.kt:102) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$interceptCall$2.invoke(StatusPages.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:91) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.CoroutineScopeKt.coroutineScope(CoroutineScope.kt:194) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.features.StatusPages.interceptCall(StatusPages.kt:101) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$Feature$install$2.invokeSuspend(StatusPages.kt:142) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.StatusPages$Feature$install$2.invoke(StatusPages.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.CallLogging$Feature$install$2.invokeSuspend(CallLogging.kt:139) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.features.CallLogging$Feature$install$2.invoke(CallLogging.kt) [ktor-server-core-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:77) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invokeSuspend(DefaultEnginePipeline.kt:118) [ktor-server-host-common-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invoke(DefaultEnginePipeline.kt) [ktor-server-host-common-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:243) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:113) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:133) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:77) [ktor-utils-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invokeSuspend(NettyApplicationCallHandler.kt:118) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invoke(NettyApplicationCallHandler.kt) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startCoroutineUndispatched(Undispatched.kt:55) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:111) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:158) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:56) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at kotlinx.coroutines.BuildersKt.launch(Unknown Source) [kotlinx-coroutines-core-jvm-1.4.2.jar:?]
	at io.ktor.server.netty.NettyApplicationCallHandler.handleRequest(NettyApplicationCallHandler.kt:43) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.ktor.server.netty.NettyApplicationCallHandler.channelRead(NettyApplicationCallHandler.kt:34) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) [netty-transport-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at io.ktor.server.netty.EventLoopGroupProxy$Companion$create$factory$1$1.run(NettyApplicationEngine.kt:216) [ktor-server-netty-jvm-1.4.3.jar:1.4.3]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.54.Final.jar:4.1.54.Final]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_251]

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1959

CIO Server ktor-server-cio:1.3.2-1.4-M2

Describe the bug
CIO server always start on "0.0.0.0" - does not respect "connector" configuration

To Reproduce
Steps to reproduce the behavior:

embeddedServer(CIO, applicationEngineEnvironment {
            module { ... }
            connector {
                host = "192.168.0.1"
                port = 8080
            }
})

Server will start on "0.0.0.0:8080" instead of "192.168.0.1:8080"

Expected behavior
Server respect connector configuration.

I got this random error out of nowhere. I'm not even using the Ktor server. It's just random bots on the web making HTTP calls to it.
I have no idea what request, call or response it was.

2021-01-19 21:21:41.833 E Unhandled exception caught for CoroutineName(call-handler)
io.netty.util.IllegalReferenceCountException: refCnt: 0, decrement: 1
	at io.netty.util.internal.ReferenceCountUpdater.toLiveRealRefCnt(ReferenceCountUpdater.java:74)
	at io.netty.util.internal.ReferenceCountUpdater.release(ReferenceCountUpdater.java:138)
	at io.netty.buffer.AbstractReferenceCountedByteBuf.release(AbstractReferenceCountedByteBuf.java:100)
	at io.netty.handler.codec.http.DefaultFullHttpRequest.release(DefaultFullHttpRequest.java:103)
	at io.netty.util.ReferenceCountUtil.release(ReferenceCountUtil.java:88)
	at io.ktor.server.netty.NettyApplicationCall.finishComplete(NettyApplicationCall.kt:53)
	at io.ktor.server.netty.NettyApplicationCall.finishSuspend(NettyApplicationCall.kt:46)
	at io.ktor.server.netty.NettyApplicationCall$finishSuspend$1.invokeSuspend(NettyApplicationCall.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.ktor.server.netty.EventLoopGroupProxy$Companion$create$factory$1$1.run(NettyApplicationEngine.kt:227)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:832)

Installed features: CallLogging, Compression, DefaultHeaders, CORS, XForwardedHeaderSupport, WebSockets (unused)

Routes: 1x get, 1x post (both for GraphQL queries)

I use reflection via Reflections for discovering implementations of services inside my module.

However, Ktor's development mode uses an OverridingClassLoader, which seems to break things.

The following snippet...

val matchers = ref.getSubTypesOf(UrlMatcher::class.java).map { cl ->
    val new = cl.getDeclaredConstructor().newInstance()
    new
}

...now tries to cast a class across class loader boundaries, which is not allowed on the JVM:

Caused by: java.lang.ClassCastException: class io.sebi.urldecoder.urlmatcher.ArdMatcher cannot be cast to class io.sebi.urlmatcher.UrlMatcher (io.sebi.urldecoder.urlmatcher.ArdMatcher is in unnamed module of loader 'app'; io.sebi.urlmatcher.UrlMatcher is in unnamed module of loader io.ktor.server.engine.OverridingClassLoader$ChildURLClassLoader @37f1104d)

This was a super confusing issue for me. I ended up solving it by turning off the development mode in my application.conf:

ktor {
    development = false
}

Problem Description

For Ktor version 1.5.2, when I return a response object (using the Jackson ContentNegotiation strategy), the response header begins with HTTP/1.1 200, e.g.:

HTTP/1.1 200 
Transfer-Encoding: chunked
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked

This conflicts with some middleware/PaaS/etc., in my case Heroku, which expect HTTP/1.1 200 OK -- specifically that OK provided in the status line. (check their documentation on this matter at this link.) I'm not sure this is a bug from your perspective, and if not, then I would instead ask for a feature which allows me to specify the header format in a template string.

Notes

This occurs for all of the following scenarios:

call.response.status(OK)
call.respond(it)

call.respond(OK, it)

call.respond(it)

This is a regression in 1.5.2 (from 1.5.0).
The following snippet inside a top-level routing block works fine in 1.5.0:

        static("/") {
            resources("frontend")
        }
        defaultResource("frontend/index.html")

i.e. I can access localhost:9000 and get served the contents of frontend/index.html.

In 1.5.2, this throws a 404 Not Found error.

I had to rewrite the snippet as follows to get the desired behavior again:

        static("/") {
            resources("frontend")
            defaultResource("frontend/index.html")
        }

I just updated my Ktor based projet to 1.5.2 from 1.4.3 and realized some of my routes stopped working.
To explain, I have a structured routing and a base controller to repeat basic CRUD route for several of my business objects. The code is as follow :

  private fun baseRoutes(route: Route) {
    route.get("/") {
      all(call.parameters["count"]?.toInt(), call.parameters["offset"]?.toLong(), true).send(call)
    }
    route.get("/{id}") {
      get(call.parameters["id"]?.toLongOrNull()).send(call)
    }
    route.post("/") {
      create(call.receiveData()).send(call)
    }
    route.patch("/{id}") {
      update(call.parameters["id"]?.toLongOrNull(), call.receiveData()).send(call)
    }
    route.delete("/{id}") {
      delete(call.parameters["id"]?.toLong()).send(call)
    }
  }

The problem is that with the new version of Ktor, route.get("/") forces the trailing slash at the end of the request, /v1/places is not equivalent to /v1/places/ anymore and /v1/places leads to a 404 error.
To fix that, I now use route.get instead of route.get("/") but I do not know if that is an issue or not.

To reproduce run the server using the following code snippet:

fun main() {
    embeddedServer(Netty, port = 8081) {
        install(Authentication) {
            digest("digest") {
                val password = "123"
                realm = "testrealm@host.com"
                digestProvider { name, realm ->
                    "$name:$realm:$password".toByteArray()
                }
            }
        }
        routing {
            authenticate("digest") {
                get("/digest") {
                    call.respondText("ok")
                }
            }
        }
    }.start(wait = true)
}

Send the following HTTP request using curl:

curl -v  'http://localhost:8081/digest' --digest -u guest:123

I expect successfully pass authentication and get a response with a status code 200 but instead, I get the following response:

*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 8081 (#0)
* Server auth using Digest with user 'guest'
> GET /digest HTTP/1.1
> Host: localhost:8081
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 401 Unauthorized
< WWW-Authenticate: Digest realm="testrealm@host.com", nonce="43f48979ca35e2a5", algorithm="MD5"
< Content-Length: 0
< 
* Connection #0 to host localhost left intact
* Issue another request to this URL: 'http://localhost:8081/digest'
* Found bundle for host localhost: 0x7fbe62518750 [can pipeline]
* Could pipeline, but not asked to!
* Re-using existing connection! (#0) with host localhost
* Connected to localhost (::1) port 8081 (#0)
* Server auth using Digest with user 'guest'
> GET /digest HTTP/1.1
> Host: localhost:8081
> Authorization: Digest username="guest", realm="testrealm@host.com", nonce="43f48979ca35e2a5", uri="/digest", response="ee8c56f444996c77cd1e5f7570035372", algorithm="MD5"
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 401 Unauthorized
* Authentication problem. Ignoring this.
< WWW-Authenticate: Digest realm="testrealm@host.com", nonce="76d13a440ec99b1c", algorithm="MD5"
< Content-Length: 0
< 
* Connection #0 to host localhost left intact
* Closing connection 0

In our project we have API clients with Reaktive interface (using Single, Completable) that use ktor, and hence coroutines under the hood.

In tests, we use Reaktive's test helpers so that our tests look like this:

apiClient.doStuff()
    .test()
    .assertCompleted()
// other checks follow, like checking calls on dependencies' mocks etc.

After trying to bump ktor from 1.4.* to 1.5.3 (we later identified that the 1.5.1 is enough to trigger the issue), these tests started failing but only on JVM. Adding a sleep(1000) call between .test() and .assertCompleted() makes the test green again, another potential workaround is using Reaktive's blockingGet instead, but ideally we'd like to keep such tests sync.

Under the hood, our tests rely on MockEngine from ktor. Dispatchers.Unconfined is used for everything in test setup.

Consider the following snippet:

    routing {
        route("/api") {
            get("example") {
                call.respond(mapOf("hello" to "world"))
            }
        }
        
        // Static feature. Try to access `/static/ktor_logo.svg`
        static("/static") {
            resources("static")
        }

        static("/") {
            resources("frontend")
            defaultResource("frontend/index.html")
        }
    }

accessing /api/example gives a 200 OK GET.

Now, consider the same snippet, slightly reordered:

    routing {
       
        // Static feature. Try to access `/static/ktor_logo.svg`
        static("/static") {
            resources("static")
        }

        static("/") {
            resources("frontend")
            defaultResource("frontend/index.html")
        }

        route("/api") {
            get("example") {
                call.respond(mapOf("hello" to "world"))
            }
        }
    }

Accessing /api/example now gets me a 404 Not Found. Upon cursory review, I haven't seen anything about routes being order-dependent in the docs, only some tangentially related discussion on StackOverflow without an authoritative answer.

This is a cross-post from channel #ktor in Slack. I was asked by Rustam to file a issue here.

When I upgraded from 1.4.3 to 1.5.2, all of my routes serving GET requests yielded a HTTP error 404 on accessing them. To me it seems, that in 1.5.2 the order of registering routes has become significant, while in 1.4.3 it didn't matter.

In the example below, context "/groot" yields 404.
If staticResources() is called after groot(), route "/groot" becomes available as expected.

class SomeApp {
    fun Application.main(testing: Boolean = false) {
        
        install(ContentNegotiation) {
            gson {
                setPrettyPrinting()
            }
        }  

        routing {
            underpants()       // serves context "/underpants"
            staticResources()  // serves root context "/"
            groot()            // serves context "/groot"
        }
    }
}

// Route for static context
fun Routing.staticResources() {
    // Serves frontend resources embedded in application jar
    static("/") {
        defaultResource("index.html", "web-resource")
        resources("web-resource")
    }
}

fun Routing.underpants(
) {
    route("/underpants") {
        get {
            val map: HashMap<Int, String> = hashMapOf(1 to "Collect underpants.", 2 to "?", 3 to "Profit!")
            call.respond(map)
        }
    }
}

fun Routing.groot(
) {
    route("/groot") {
        get {
            val map: HashMap<Int, String> = hashMapOf(1 to "I", 2 to "am", 3 to "groot!")
            call.respond(map)
        }
    }
}

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/909

Ktor Version

1.1.2

Ktor Engine Used(client or server and name)

Netty server

JVM Version, Operating System and Relevant Context

JDK 11

Feedback

Being able to get the local port when starting ktor on a random port:

embeddedServer(Netty, port = 0)

The information is available in case of netty on channel, but I can not get this information of NettyApplicationEngine itself

I can't get Ktor to work in a KMM project, I just get a Unresolved reference: HttpClient error when trying to reference any Ktor classes. If I try to manually add the ktor import it says Unresolved reference io. Other dependencies like Kermit resolve fine, it seems to just be Ktor with the issue. Here's my simple steps to reproduce:

In Android Studio (I have tried both 4.1.3 and 4.2 Beta 6), I go File -> New -> KMM Application.

In the shared module build.gradle.kts I add the dependencies for the ktor client:

val commonMain by getting {
        dependencies {
            implementation("io.ktor:ktor-client-core:1.5.2")
        }
     }

In the Greeting class in commonMain I try creating an HttpClient like it says in the Ktor documents https://kotlinlang.org/docs/mobile/use-ktor-for-networking.html#select-an-engine:

class Greeting {
    val httpClient: HttpClient = HttpClient()

    fun greeting(): String {
        return "Hello, ${Platform().platform}!"
    }
}

I get the Unresolved reference: HttpClient. The ktor imports don't work.

Things I have tried:

Adding the Android and iOS client dependencies as well.
Adding enableFeaturePreview("GRADLE_METADATA") to settings.gradle.kts as suggested here: How to fix 'Unresolved reference: HttpClient' with ktor-client-core targeting linuxX64
Cleaning, syncing with gradle, invalidate cashes and restart, closing AS and re-opening, building the project.
I really have no idea why this doesn't work, it seems like it the simplest possible setup. Here's my build.gradle files and settings file (which were auto generated from new KMM project wizard)

shared module build.gradle.kts

import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget

plugins {
    kotlin("multiplatform")
    id("com.android.library")
}

kotlin {
    android()
    ios {
        binaries {
            framework {
                baseName = "shared"
            }
        }
    }
    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation("io.ktor:ktor-client-core:1.5.2")
            }
        }
        val commonTest by getting {
            dependencies {
                implementation(kotlin("test-common"))
                implementation(kotlin("test-annotations-common"))
            }
        }
        val androidMain by getting {
            dependencies {
                implementation("com.google.android.material:material:1.2.1")
            }
        }
        val androidTest by getting {
            dependencies {
                implementation(kotlin("test-junit"))
                implementation("junit:junit:4.13")
            }
        }
        val iosMain by getting
        val iosTest by getting
    }
}

android {
    compileSdkVersion(29)
    sourceSets["main"].manifest.srcFile("src/androidMain/AndroidManifest.xml")
    defaultConfig {
        minSdkVersion(24)
        targetSdkVersion(29)
    }
}

val packForXcode by tasks.creating(Sync::class) {
    group = "build"
    val mode = System.getenv("CONFIGURATION") ?: "DEBUG"
    val sdkName = System.getenv("SDK_NAME") ?: "iphonesimulator"
    val targetName = "ios" + if (sdkName.startsWith("iphoneos")) "Arm64" else "X64"
    val framework = kotlin.targets.getByName<KotlinNativeTarget>(targetName).binaries.getFramework(mode)
    inputs.property("mode", mode)
    dependsOn(framework.linkTask)
    val targetDir = File(buildDir, "xcode-frameworks")
    from({ framework.outputDirectory })
    into(targetDir)
}

tasks.getByName("build").dependsOn(packForXcode)

Project build.gradle.kts

buildscript {
    repositories {
        gradlePluginPortal()
        jcenter()
        google()
        mavenCentral()
    }
    dependencies {
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.10")
        classpath("com.android.tools.build:gradle:4.0.1")
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
}

settings.gradle.kts

pluginManagement {
    repositories {
        google()
        jcenter()
        gradlePluginPortal()
        mavenCentral()
    }
    
}
rootProject.name = "core"


include(":androidApp")
include(":shared")

Here is my stackoverflow post https://stackoverflow.com/questions/66848774/adding-ktor-to-kotlin-multiplatform-mobile-results-in-unresolved-reference-http and another from another user that seems to be experiencing the same problem https://stackoverflow.com/questions/66630659/cannot-import-io-ktor-to-common-module-of-kmm-in-android-studio

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1936

Ktor 1.3.2, TestApplicationEngine

When running a test that sends post with multipart it runs forever and never stops.

No problem when server really runs. It's just the test.

To Reproduce

Server:

fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)

@Suppress("unused") // Referenced in application.conf
@kotlin.jvm.JvmOverloads
fun Application.module(testing: Boolean = false) {
    install(ContentNegotiation) {
    }

    routing {
        post("/") {
            val mp = try {
                call.receiveMultipart()
            } catch (e: Exception) {
                call.application.log.error("Getting multipart error"")
                null
            }

           if (mp == null) call.respond(HttpStatusCode.BadRequest, "Null value")
           else call.respond(HttpStatusCode.OK,"OK")
        }
    }
}

Test:

internal class ApplicationKtTest {
    private val boundary = "***bbb***"
    private val  sysTempDir = System.getProperty("java.io.tmpdir") ?: "/tmp"

    private val multipart = listOf(PartData.FileItem({ byteArrayOf(1, 2, 3).inputStream().asInput() }, {}, headersOf(
            HttpHeaders.ContentDisposition,
            ContentDisposition.File
                    .withParameter(ContentDisposition.Parameters.Name, "file")
                    .withParameter(ContentDisposition.Parameters.FileName, "test.jpg")
                    .toString()
    )))

    @Test
    fun testUploadApplication() = testApp {
        handlePost("/", boundary, multipart).apply {
            println("============= RESPONSE ====================")
            println(response.content)
            println("=================================")
        }
    }
}

private fun TestApplicationEngine.handlePost(uri: String,
         boundary: String,
         multipart: List<PartData.FileItem>,
         setup: TestApplicationRequest.() -> Unit = {}
): TestApplicationCall {
    return handleRequest(method = HttpMethod.Post, uri = uri)  {
        addHeader(HttpHeaders.ContentType,
                ContentType.MultiPart.FormData.withParameter("boundary", boundary).toString()
        )
        setBody(boundary, multipart)
        setup()
    }
}

private fun testApp(callback: TestApplicationEngine.() -> Unit): Unit {
    withTestApplication({ module(true) }, callback)
}

The test runs forever and gives no result. if addHeader and setBody are commented there is a response.

Expected behavior
The test should print OK

Repository
If you just want to clone a test repository.

I would like to support a generic config for my application.

Kindly consider this example.
I need to create java.util.Properties object to instantiate KafkaProducer API doc
http://kafka.apache.org/21/javadoc/index.html?org/apache/kafka/clients/producer/KafkaProducer.html

There could be common configs and producer-specific configs.
to get an "effective" config I need to merge two maps - producer config and common properties.

I couldn't find the way how I get all key,value pairs from ApplicationConfig

application.conf example

kafka {
    bootstrap-servers = ["my.confluent.cloud:9092"]
    
    properties {
      ssl.endpoint.identification.algorithm = https
      sasl.mechanism = PLAIN
      request.timeout.ms = 20000
      retry.backoff.ms = 500
      sasl.jaas.config = "org.apache.kafka.common.security.plain.PlainLoginModule required username=${?USER} password=${?SECRET};"
      security.protocol = SASL_SSL
    }
    consumer {
      group.id = ktor-app
      key.deserializer = org.apache.kafka.common.serialization.StringDeserializer
      value.deserializer = org.apache.kafka.common.serialization.StringDeserializer
    }
    producer {
      key.serializer = org.apache.kafka.common.serialization.StringSerializer
      value.serializer = org.apache.kafka.common.serialization.StringSerializer
    }

Kindly advise

Need to install missing dependencies:

libncurses5 libncursesw5 libtinfo5

The list allCompileKotlinTasks was removed due to refactoring

The project doesn't compile

Hi,

First of all, thank you for creating and maintaining ktor, we enjoy using it a lot! The issue we notice that after v1.5.2, developmentMode value is set as true by default in tests (more precisely it is on when assertions are enabled) -> https://github.com/ktorio/ktor/blob/de742d1adfbbb994bedda198e6739c724e62a974/ktor-utils/jvm/src/io/ktor/util/PlatformUtils.kt#L15-L16
This issue causes our test cases to fail since, in developmentMode, the application is started in a different classloader which leads to some problems with our test setup. We had to override the `io.ktor.development` value to solve it for now.

We believe that this behavior is unintended and a bug. Could you please take a look and provide a better developmentMode resolving method?

Subsystem
Server ktor-features/ktor-velocity

Motivation
Velocity templating is not very useful without being able to use the standard Velocity Tools.

Solution
This PR adds a VelocityTool feature. It is used as follow:

        install(VelocityTools) {

            engine {
                // whatever engine configuration you need
                setProperty("resource.loader", "string")
                addProperty("resource.loader.string.name", "myRepo")
                addProperty("resource.loader.string.class", StringResourceLoader::class.java.name)
                addProperty("resource.loader.string.repository.name", "myRepo")
            }
            
            addDefaultTools() // add a default tool
            tool("foo", MyCustomTool::class.java) // add a custom tool
        }

Periodically (not every time) during running tests in https://github.com/rsocket/rsocket-kotlin using ktor-io exception appeared trying to build ByteReadPacket using buildPacket {}

Exception in thread "DefaultDispatcher-worker-9 @coroutine#122840" io.ktor.utils.io.core.InsufficientSpaceException: Not enough free space to write long integer of 8 bytes, available 7 bytes.
	at io.ktor.utils.io.core.BufferPrimitivesKt.writeLong(BufferPrimitives.kt:1081)
	at io.ktor.utils.io.core.OutputPrimitivesKt.writeLongFallback(OutputPrimitives.kt:50)
	at io.ktor.utils.io.core.OutputPrimitivesKt.writeLong(OutputPrimitives.kt:45)
	at io.rsocket.kotlin.frame.KeepAliveFrame.writeSelf(KeepAliveFrame.kt:33)
	at io.rsocket.kotlin.frame.Frame.toPacket(Frame.kt:36)
	at io.rsocket.kotlin.internal.RSocketState$start$3.invokeSuspend(RSocketState.kt:143)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.selects.SelectBuilderImpl.resumeWith(Select.kt:306)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:738)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

CommandLine.kt

requireNotNull(getKey(sslKeyAlias, sslPrivateKeyPassword.toCharArray()) == null)

is always successful

Multiple instance of "has been" in exception messages such as

Request timeout has been expired 

Fix tests failing due to compiler error. The following error is in references

https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreMacOSJava11/21952
https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreWindowsJava11/21949
https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreMacOSJava8/21953
https://ktor.beta.teamcity.com/buildConfiguration/Ktor_KtorMatrixCoreWindowsJava8/21951

Ktor Server version

1.4.3, 1.5.2 (both affected)

Feedback

I’ve recently developed a simple Ktor app and organised a hosting for it on Apache Webserver + Tomcat.
The app has a post { … } route used for processing HTTP POST requests.

post("/api/v1/meeting") {
    logger.trace { "Before call.receiveText()" }
    val text = call.receiveText()
    logger.trace { "After call.receiveText()" }
    ...
}

The route works fine for all requests except the first one (and sometimes 2 or 3). Additional tracing shows that request processing stucks on the line "call.receiveText()", where there is an attempt to read incoming JSON body of HTTP POST.
The request is stuck until network timeout.

Every following POST request with exactly the same content is processed fine. Assuming some lazy loading issue, I put “load-on-startup” in tomcat servlet setting - it didn’t affect the result.

Attaching the logs:

Apache access.log (you can see the timeout at the end)
Apache error.log (no clues)
Tomcat catalina logs (no clues)
Servlet log (only the first tracing message is in the log)

Tried to add ktor {.development=true } into application.conf, it didn't bring additional info.

P.S. the issue is reported following the JB request in https://stackoverflow.com/questions/66437014/ktor-first-call-receivetext-gets-timeout

Hi, 1.5.2 broke file ktor uploads. I used Java11 client to upload image in my tests and "Broke delimeter occured" error poped up. 1.5.1 works just fine.

val boundary = BigInteger(256, java.util.Random()).toString().substring(0, 70)
val body = ofMimeMultipartData(paramName, fileContent, fileName, contentType, boundary)

val request = HttpRequest.newBuilder()
      .header("Accept-Language", "en")
      .header("Authorization", "Bearer ${this.apiKey}")
      .header("Content-Type", "multipart/form-data;boundary=$boundary")
      .POST(body)
      .uri(URI.create(urlStr))
      .build();

    val client = HttpClient.newHttpClient()
    val response = client.send(request, HttpResponse.BodyHandlers.ofInputStream());

This is the stack trace on the server:

2021-03-09 10:28:03.209 [ERROR] io.ktor.application.Application - Unknown error: Broken delimiter occurred
java.io.IOException: Broken delimiter occurred
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invokeSuspend(Delimited.kt:58)
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invoke(Delimited.kt)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend$suspendImpl(ByteBufferChannel.kt:1822)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend(ByteBufferChannel.kt)
	at io.ktor.utils.io.DelimitedKt.skipDelimiterSuspend(Delimited.kt:56)
	at io.ktor.utils.io.DelimitedKt.skipDelimiter(Delimited.kt:51)
	at io.ktor.http.cio.MultipartKt$parseMultipart$1.invokeSuspend(Multipart.kt:378)
	(Coroutine boundary)
	at io.ktor.features.StatusPages.interceptCall(StatusPages.kt:101)
	at io.ktor.features.StatusPages$Feature$install$2.invokeSuspend(StatusPages.kt:142)
	at io.ktor.util.pipeline.DebugPipelineContext.proceedLoop(DebugPipelineContext.kt:82)
	at io.ktor.features.CallLogging$Feature$install$2.invokeSuspend(CallLogging.kt:139)
	at io.ktor.util.pipeline.DebugPipelineContext.proceedLoop(DebugPipelineContext.kt:82)
	at io.ktor.server.engine.DefaultEnginePipelineKt$defaultEnginePipeline$2.invokeSuspend(DefaultEnginePipeline.kt:124)
	at io.ktor.util.pipeline.DebugPipelineContext.proceedLoop(DebugPipelineContext.kt:82)
	at io.ktor.server.netty.NettyApplicationCallHandler$handleRequest$1.invokeSuspend(NettyApplicationCallHandler.kt:123)
Caused by: java.io.IOException: Broken delimiter occurred
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invokeSuspend(Delimited.kt:58)
	at io.ktor.utils.io.DelimitedKt$skipDelimiterSuspend$2.invoke(Delimited.kt)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend$suspendImpl(ByteBufferChannel.kt:1822)
	at io.ktor.utils.io.ByteBufferChannel.lookAheadSuspend(ByteBufferChannel.kt)
	at io.ktor.utils.io.DelimitedKt.skipDelimiterSuspend(Delimited.kt:56)
	at io.ktor.utils.io.DelimitedKt.skipDelimiter(Delimited.kt:51)
	at io.ktor.http.cio.MultipartKt$parseMultipart$1.invokeSuspend(Multipart.kt:378)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.internal.DispatchedContinuation.resumeWith(DispatchedContinuation.kt:188)
	at io.ktor.utils.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:93)
	at io.ktor.utils.io.ByteBufferChannel.resumeWriteOp(ByteBufferChannel.kt:2190)
	at io.ktor.utils.io.ByteBufferChannel.bytesRead(ByteBufferChannel.kt:912)
	at io.ktor.utils.io.ByteBufferChannel.readAsMuchAsPossible(ByteBufferChannel.kt:508)
	at io.ktor.utils.io.ByteBufferChannel.readAvailable$suspendImpl(ByteBufferChannel.kt:703)
	at io.ktor.utils.io.ByteBufferChannel.readAvailable(ByteBufferChannel.kt)
	at io.ktor.utils.io.ByteBufferChannel.readAvailableSuspend(ByteBufferChannel.kt:747)
	at io.ktor.utils.io.ByteBufferChannel$readAvailableSuspend$2.invokeSuspend(ByteBufferChannel.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.ktor.server.netty.EventLoopGroupProxy$Companion$create$factory$1$1.run(NettyApplicationEngine.kt:227)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:834)

I am developing a Ktor Web Server on Kotlin Version 1.4.30 and Ktor Version 1.5.2 and im routing an endpoint at the path /myendpoint. The endpoint takes some parameters from the request, and does multiple API Calls with it, I added print lines all over those to see if anyone was returning a faulty result that caused it to fail, didnt seem like it. The endpoint works on average every 10-15 tries, on the other tries I just see [eventLoopGroupProxy-4-3] INFO Application - Unhandled: GET - /myendpoint, io failed in the console. The fact that my print lines didnt seem to hit when debugging my API Calls leads me to believe this might be a Ktor issue. Help would be appreciated

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1040

Ktor Version

1.1.3

Ktor Engine Used(client or server and name)

Client iOS with default engine

Feedback (Bug)

When adding Firebase Performance to an iOS application, the app crashes when making a request with Ktor.

I've forked the sample mmp project and added the Firebase Performance library. The application crashes due to Firebase Performance. It might be because Firebase intercepts all network requests and it might be incompatible with Ktor.

You can find the sample mmp client crashing with Firebase Performance here https://github.com/eduardbosch/ktor-samples/commit/35bb435b4138ef966eeb9c44cbaf632bfaaeb305
Remember to add the GoogleServices-Info.plist to prevent Firebase to crash when it is initialised.

I hope this can help Ktor! 🎉

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/1095

Ktor Version

1.1.5

Ktor Engine Used(client or server and name)

CIO server

JVM Version, Operating System and Relevant Context

1.8.0_131

Feedback

When using the CIO server engine, requests with more than 32 headers are rejected with error 400 and no further diagnostic.
I used the debugger to further track the cause of this error and found that during header parsing an exception is thrown:

kotlin.NotImplementedError: An operation is not implemented: Implement headers overflow

This is due to the following declaration in file HttpHeaderMap.kt:

package io.ktor.http.cio

import io.ktor.http.cio.internals.*
import io.ktor.util.*
import kotlinx.io.pool.*

private const val EXPECTED_HEADERS_QTY = 32

which effectively limits the number of headers to 32.
This error does not appear with the Jetty engine.

Problem

I'm using mock engine to test our app. The mock engine request handler sends JSON string as body, the correct content type and status 200.
Invoking the mocked request on Android works, but invoking the same request on iOS fails:

No transformation found: class io.ktor.utils.io.ByteChannelNative -> class kotlin.collections.List
with response from <url>:
status: 200 OK
response headers: 
Content-Type: application/json; charset=UTF-8

Expected

Both iOS and Android mocked engine should work

HttpResponse.receive() used to throw a DoubleReceiveException when called twice, however after upgrading from ktor 1.3.2 to 1.5.2, it is no longer doing so.

private suspend fun requestNCSI(client: HttpClient): HttpResponse {
        val url = "http://www.msftncsi.com/ncsi.txt"
        return client.request<HttpResponse>(url) {
            method = HttpMethod.Get
        }
    }

should("throw an exception when receiving more than once.") {
            shouldThrow<DoubleReceiveException> {
                val call = requestNCSI(client)
                call.receive<String>()
                call.receive<String>()
            }
        }

I am Appending A Header in Ktor Client Request like shown in attached Image ,
Everything work as expected on JVM and Android platforms.

but when running in browser(Kotlin/JS) , this referer gets overwitten by https://localhost/
tried on chrome and firefox both.

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.uclan.remotecamera.androidApp, PID: 11981
    io.ktor.application.MissingApplicationFeatureException: Application feature WebSockets is not installed

Encountered using the following server setup:

    fun start() {
        Log.d(TAG, "Attempting to start broadcast server")
        embeddedServer(Netty, port) {
            install(WebSockets) {
                routing {
                    val connections =
                        Collections.synchronizedSet<DefaultWebSocketSession?>(LinkedHashSet())
                    webSocket("/exchange") {
                        connections.add(this)
                        for (frame in incoming) {
                            if (frame is Frame.Text) {
                                val msg = frame.readText()
                                Log.d(TAG, "Received msg '$msg'")
                                connections.forEach {
                                    it.outgoing.send(Frame.Text(msg))
                                }
                            }
                        }
                    }
                }
            }
        }.start(wait = true)
    }

and the following dependencies:

    implementation("io.ktor:ktor-websockets:1.5.2")
    implementation("io.ktor:ktor-server-netty:1.5.2")

    implementation("io.ktor:ktor-client-websockets:1.5.2")
    implementation("io.ktor:ktor-client-cio:1.5.2")

Client code seems to be unaffected

When try create 1000 concurrent request by ** CIO** ktor client had exception Connection reset by peer on macOS(On Ubuntu 20.04 nor reproduced).
When use Apache ktor client not reproduced spend time 1.69s
When use OkHttp ktor client not reproduced but spend time 201s (Maybe here something wrong too)

Repository to reproduce issue

Steps to reproduce issue:

1. Run Netty server by src/main/kotlin/NettyServer.kt
2. Run src/main/kotlin/CioClientApplication.kt

System info:

• JDK 11 (adopt-openjdk-11.0.10)
• macOS BigSur 11.2 (20D64)
• Intel Core i7

There is no space between cookies sent by http-client. Normally, it should be a semicolon and a space to separate each cookie, which caused me to authenticate abnormally when requesting certain websites.

see this doc https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cookie

my ktor version is 1.5.1

Within the ktor-client-mock module the OutgoingContent.toByteArray() within the MockUtils.kt file is broken when using it on a OutgoingContent.WriteChannelContent. The issue is that the method stalls because the ByteChannel, which is used to temporarily store the bytes in, isn't closed before calling the toByteArray method.

I solved this issue myself by reimplementing the method as follows:

    private suspend fun OutgoingContent.toByteArray() : ByteArray {
        return when (this) {
            is OutgoingContent.NoContent -> ByteArray(0)
            is OutgoingContent.ByteArrayContent -> bytes()
            is OutgoingContent.ReadChannelContent -> readFrom().toByteArray()
            is OutgoingContent.WriteChannelContent -> {
                val channel = ByteChannel()

                try {
                    writeTo(channel)
                    channel.close()
                    channel.toByteArray()
                } catch (e: Exception) {
                    channel.close(e)

                    throw e
                }
            }
            else -> ByteArray(0)
        }
    }

I'm using KTor and can sign in with my app using Google's OAuth2. This gives me a valid access token and works for authenticating my user. I am then using this access token to make calls to other Google APIs, and this works great... until the accessToken expires. I've printed out the Principal object that comes back, and while there is an expires value, the refreshToken value is null.

It seems like there needs to be an additional HTTP parameter on the authentication request. For Google it wants access_type=offline (https://developers.google.com/identity/protocols/oauth2/web-server#httprest_3) while it looks like Auth0 wants scope=offline_access as a parameter (https://auth0.com/docs/tokens/refresh-tokens/get-refresh-tokens). Maybe a solution would be to support extra parameters to the URL?

Below is my configuration with parameters hidden.

    name = "google",
    authorizeUrl = authorizeUrl,
    accessTokenUrl = tokenUrl,
    requestMethod = HttpMethod.Post,

    clientId = clientId,
    clientSecret = clientSecret,
    defaultScopes = listOf("profile", // no email, but gives full name, picture, and id
        "email", // email
        "https://www.googleapis.com/auth/calendar.readonly" // google calendar
        ,"https://www.googleapis.com/auth/plus.login"
    )
)

I'm working on a project which requires a client to stream a potentially large amount of binary data to a server and receive a stream in response. Because the client to server stream could be very long, I need to be able to read the response on the client side before the client has completed sending. From my testing, this does not appear to be possible using the CIO client.

Here is a small example which illustrates the limitation:

suspend fun main() {
    runServer()
    runClient()
}

suspend fun runServer() {
    embeddedServer(Netty, port = 8763) {
        routing {
            post("/post") {
                launch { readChannel("Server", call.receiveChannel()) }
                launch { call.respond(createContent("Server")) }
            }
        }
    }.also { it.start(false) }
}

suspend fun runClient() {
    HttpClient(CIO).request<HttpStatement> {
        url("http://localhost:8763/post")
        method = HttpMethod.Post
        body = createContent("Client")
    }.execute { readChannel("Client", it.receive()) }
}

fun createContent(name: String) = createContent {
    repeat(3) {
        println("$name: Sending ${BYTES.size} bytes")
        writeFully(BYTES)
        flush()
        delay(1000)
    }
}

fun createContent(body: suspend ByteWriteChannel.() -> Unit) =
    ChannelWriterContent(body, null)

suspend fun readChannel(name: String, channel: ByteReadChannel) {
    val buffer = ByteArray(BYTES.size)
    while (true) {
        try { channel.readFully(buffer) }
        catch(e: Exception) { break }
        println("$name: Read ${buffer.size} bytes")
    }
}

Running the above sample produces the following output:

Client: Sending 1024 bytes
Server: Read 1024 bytes
Server: Sending 1024 bytes
Client: Sending 1024 bytes
Server: Read 1024 bytes
Server: Sending 1024 bytes
Client: Sending 1024 bytes
Server: Read 1024 bytes
Server: Sending 1024 bytes
Client: Read 1024 bytes
Client: Read 1024 bytes
Client: Read 1024 bytes

As you can see, the client reads occur after all client sends which is not acceptable for my use case. Ideally, the output would look like this:

Client: Sending 1024 bytes
Server: Read 1024 bytes
Server: Sending 1024 bytes
Client: Read 1024 bytes
Client: Sending 1024 bytes
Server: Read 1024 bytes
Server: Sending 1024 bytes
Client: Read 1024 bytes
Client: Sending 1024 bytes
Server: Read 1024 bytes
Server: Sending 1024 bytes
Client: Read 1024 bytes

From what I can tell, it seems the HttpStatement.execute method blocks until the client has sent it's entire payload.

This issue was imported from GitHub issue: https://github.com/ktorio/ktor/issues/593

Whenever I try and do a simple http request on macOs the program freezes and reports a memory leak:

an example where I publish the latest eap13 branch commit to localMaven which is tagged (v0.9.5-rc13):

buildscript {
    repositories {
        jcenter()
        maven { url 'https://plugins.gradle.org/m2/' }
        maven { url 'https://dl.bintray.com/jetbrains/kotlin-native-dependencies' }
        maven {url 'http://dl.bintray.com/kotlin/kotlin-dev'}
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-native-gradle-plugin:0.9.2-dev-4008"
    }
}

allprojects {

    project.ext {
        //make extras set inside buildscript available in all modules
        kotlin_version = '1.3.0-rc-51'
        kotlin_coroutines_version = '0.26.1-eap13'
    }
}


apply plugin: 'kotlin-platform-native'

repositories {
    mavenLocal()
    jcenter()
}



components.main {
    targets = ["macos_x64"]
    outputKinds = [EXECUTABLE]
    dependencies {
        implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core-native:0.26.1-eap13")


        //you need to clone ktor and publish to local maven
        implementation "io.ktor:ktor-client-ios:0.9.4-SNAPSHOT"
    }

}

example program:

import kotlinx.coroutines.runBlocking
import io.ktor.client.engine.ios.*
import io.ktor.client.*
import io.ktor.http.*
import io.ktor.client.request.*
import kotlinx.coroutines.*
import kotlin.coroutines.*
import platform.darwin.*

internal val ApplicationDispatcher: CoroutineDispatcher = NsQueueDispatcher(dispatch_get_main_queue())

fun main(args: Array<String>) = runBlocking<Unit> {
    val api = ApplicationApi()
    api.about {
        println(it)
    }
    delay(3000L)

    return@runBlocking
}

internal class NsQueueDispatcher(
        private val dispatchQueue: dispatch_queue_t
) : CoroutineDispatcher() {
    override fun dispatch(context: CoroutineContext, block: Runnable) {
        dispatch_async(dispatchQueue) {
            block.run()
        }
    }
}

class ApplicationApi {
    private val client = HttpClient()

    fun about(callback: (String) -> Unit) {
        launch(ApplicationDispatcher) {
            val result: String = client.get {
                url {
                    protocol = URLProtocol.HTTPS
                    port = 443
                    host = "tools.ietf.org"
                    encodedPath = "rfc/rfc1866.txt"
                }
            }

            callback(result)
        }
    }
}

when run:

/opt/teamcity-agent/work/4d622a065c544371/runtime/src/main/cpp/Memory.cpp:1124: runtime 
assert: Memory leaks found
Abort trap: 6

Some users of my app are getting the following crash:

Fatal Exception: java.nio.charset.IllegalCharsetNameException: %s
       at java.nio.charset.Charset.checkName(Charset.java:317)
       at java.nio.charset.Charset.lookup2(Charset.java:519)
       at java.nio.charset.Charset.lookup(Charset.java:497)
       at java.nio.charset.Charset.forName(Charset.java:563)
       at io.ktor.http.ContentTypesKt.charset(ContentTypesKt.java:271)
       at io.ktor.http.HttpMessagePropertiesKt.charset(HttpMessagePropertiesKt.java:79)
       at io.ktor.client.statement.HttpStatementKt.readText(HttpStatementKt.java:169)
       at io.ktor.client.statement.HttpStatementKt.readText$default(HttpStatementKt.java:168)
       at io.ktor.client.features.DefaultResponseValidationKt$addDefaultResponseValidation$1$1.invokeSuspend(DefaultResponseValidationKt.java:36)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(BaseContinuationImpl.java:33)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.java:106)
       at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.java:571)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.java:750)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.java:678)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.java:665)

Looks like that for some reason the charset seems to be %s. I am not sure why that is the case. However, I do not think that this should crash the app. I think it would be better if Ktor could just fall back to UTF8 when the charset is invalid. Would that be possible in Ktor?

I am using a manually built version of Ktor based on this commit: https://github.com/Thomas-Vos/ktor/commit/6dceed335d2de689dd30e3cb1d62d571c8061041

Calling HttpResponse.readText is throwing this exception.
I'm using Dispatchers.Main only.
I'm not explicitly trying to save any HTTP calls, just making one-time calls.

I've tried both Ktor 1.5.1 and 1.5.0
Coroutines 1.4.2-native-mt
Kotlin 1.4.20

Caused by: kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen io.ktor.client.call.SavedHttpCall@3f8be38
    at 0   jgosdk                              0x00000001109e102f kfun:kotlin.Throwable#<init>(kotlin.String?){} + 95 (/Users/teamcity1/teamcity_work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/Throwable.kt:23:37)
    at 1   jgosdk                              0x00000001109d982d kfun:kotlin.Exception#<init>(kotlin.String?){} + 93 (/Users/teamcity1/teamcity_work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/Exceptions.kt:23:44)
    at 2   jgosdk                              0x00000001109d9a9d kfun:kotlin.RuntimeException#<init>(kotlin.String?){} + 93 (/Users/teamcity1/teamcity_work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/Exceptions.kt:34:44)
    at 3   jgosdk                              0x0000000110a1276d kfun:kotlin.native.concurrent.InvalidMutabilityException#<init>(kotlin.String){} + 93 (/Users/teamcity1/teamcity_work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/native/concurrent/Freezing.kt:22:60)
    at 4   jgosdk                              0x0000000110a13f4f ThrowInvalidMutabilityException + 431 (/Users/teamcity1/teamcity_work/f01984a9f5203417/runtime/src/main/kotlin/kotlin/native/concurrent/Internal.kt:92:11)
    at 5   jgosdk                              0x0000000110b18e00 MutationCheck + 128
    at 6   jgosdk                              0x0000000110da9e38 kfun:io.ktor.client.call.SavedHttpCall.<set-responseContent>#internal + 104 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/call/SavedCall.kt:23:13)
    at 7   jgosdk                              0x0000000110daa4e4 kfun:io.ktor.client.call.SavedHttpCall.$getResponseContentCOROUTINE$7#invokeSuspend(kotlin.Result<kotlin.Any?>){}kotlin.Any? + 1412 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/call/SavedCall.kt:30:13)
    at 8   jgosdk                              0x0000000110daa676 kfun:io.ktor.client.call.SavedHttpCall#getResponseContent(){}io.ktor.utils.io.ByteReadChannel + 246 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/call/SavedCall.kt:28:22)
    at 9   jgosdk                              0x0000000110da78eb kfun:io.ktor.client.call.HttpClientCall.$receiveCOROUTINE$5#invokeSuspend(kotlin.Result<kotlin.Any?>){}kotlin.Any? + 2379 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/call/HttpClientCall.kt:82:72)
    at 10  jgosdk                              0x0000000110da85c2 kfun:io.ktor.client.call.HttpClientCall#receive(io.ktor.client.call.TypeInfo){}kotlin.Any + 322 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/call/HttpClientCall.kt:75:20)
    at 11  jgosdk                              0x0000000110dec056 kfun:io.ktor.client.statement.$readTextCOROUTINE$97#invokeSuspend(kotlin.Result<kotlin.Any?>){}kotlin.Any? + 1942 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/statement/HttpStatement.kt:170:45)
    at 12  jgosdk                              0x0000000110dec4c2 kfun:io.ktor.client.statement#readText@io.ktor.client.statement.HttpResponse(io.ktor.utils.io.charsets.Charset?){}kotlin.String + 322 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/statement/HttpStatement.kt:168:16)
    at 13  jgosdk                              0x0000000110dec67f kfun:io.ktor.client.statement#readText$default@io.ktor.client.statement.HttpResponse(io.ktor.utils.io.charsets.Charset?;kotlin.Int){}kotlin.String + 303 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/statement/HttpStatement.kt:168:16)

I have observed that the CIO WebSockets client is sending out a Sec-WebSocket-Extensions header in the initial handshake even if no extension has been specified. This is causing issues with RFC 6455 compliant servers as (if my understanding is correct) the spec mandates that at least one extension be provided if the header exists (otherwise fail).

https://tools.ietf.org/html/rfc6455#section-9.1
https://tools.ietf.org/html/rfc2616#section-2.1 (ABNF notes)

I am not familiar enough with the Ktor code to submit a PR with a fix, but as a workaround a simple plugin can be used to strip the header from the request before sending it to the server:

import io.ktor.client.*
import io.ktor.client.features.*
import io.ktor.client.request.*
import io.ktor.http.*
import io.ktor.util.*

/**
 * Intercept outgoing HTTP requests to strip the `Sec-WebSocket-Extensions` header if it is empty.
 *
 * This feature should be installed after the `WebSockets` feature has been installed.
 */
internal class StripBlankSWSEHeader {
    private fun stripHeader(context: HttpRequestBuilder) {
        if (HttpHeaders.SecWebSocketExtensions in context.headers
                && context.headers[HttpHeaders.SecWebSocketExtensions]?.isBlank() == true) {
            context.headers.remove(HttpHeaders.SecWebSocketExtensions)
        }
    }

    class EmptyConfig

    internal companion object Feature : HttpClientFeature<EmptyConfig, StripBlankSWSEHeader> {
        override val key: AttributeKey<StripBlankSWSEHeader> = AttributeKey("StripEmptyWSExtensionHeader")

        override fun prepare(block: EmptyConfig.() -> Unit): StripBlankSWSEHeader {
            return StripBlankSWSEHeader()
        }

        override fun install(feature: StripBlankSWSEHeader, scope: HttpClient) {
            scope.requestPipeline.intercept(HttpRequestPipeline.Render) {
                feature.stripHeader(context)

                proceed()
            }
        }
    }
}

In the client configuration the StripBlankSWSEHeader feature must be registered AFTER the WebSockets feature:

install(WebSockets)
install(StripBlankSWSEHeader) // must be registered AFTER WebSockets feature

When the server returns 302 with the URL has '%3D' (inside query part), the Ktor replaces '%3D' with '=' so some server returns invalid content (in this case, 403).

Test code:

import io.ktor.client.*
import io.ktor.client.features.*
import io.ktor.client.request.*
import io.ktor.client.statement.*
import kotlinx.coroutines.runBlocking

fun main(): Unit = runBlocking {
    val url = "https://dl.bintray.com/anatawa12/maven/com/anatawa12/forge/ForgeGradle/1.2-1.0.0/ForgeGradle-1.2-1.0.0-javadoc.jar"

    // also in CIO
    //val factory = io.ktor.client.engine.cio.CIO
    val factory = io.ktor.client.engine.apache.Apache
    val clientNoFollow = HttpClient(io.ktor.client.engine.cio.CIO) {
        followRedirects = false
        expectSuccess = false
    }
    val response = clientNoFollow.get<HttpResponse>(url)
    println("status: " + response.status)
    println("location:  " + response.headers["Location"])
    println("location has %3D: " + response.headers["Location"]!!.contains("%3D"))
    check(response.headers["Location"]!!.contains("%3D"))

    val clientWithFollow = HttpClient(io.ktor.client.engine.cio.CIO)
    try {
        val got = clientWithFollow.get<ByteArray>(url)
    } catch (e: ResponseException) {
        println("error: " + e)
        println("error url: " + e.response.request.url)
        println("error url has %3D: " + e.response.request.url.toString().contains("%3D"))
    }
}

Log:

status: 302 
location:  https://d29vzk4ow07wi7.cloudfront.net/d133d0ab57f0e1a996fa1367eb3e5c7ebbd1860a5d505a69791d7746457acb0a?response-content-disposition=attachment%3Bfilename%3D%22ForgeGradle-1.2-1.0.0-javadoc.jar%22&Policy=eyJTdGF0ZW1lbnQiOiBbeyJSZXNvdXJjZSI6Imh0dHAqOi8vZDI5dnprNG93MDd3aTcuY2xvdWRmcm9udC5uZXQvZDEzM2QwYWI1N2YwZTFhOTk2ZmExMzY3ZWIzZTVjN2ViYmQxODYwYTVkNTA1YTY5NzkxZDc3NDY0NTdhY2IwYT9yZXNwb25zZS1jb250ZW50LWRpc3Bvc2l0aW9uPWF0dGFjaG1lbnQlM0JmaWxlbmFtZSUzRCUyMkZvcmdlR3JhZGxlLTEuMi0xLjAuMC1qYXZhZG9jLmphciUyMiIsIkNvbmRpdGlvbiI6eyJEYXRlTGVzc1RoYW4iOnsiQVdTOkVwb2NoVGltZSI6MTYxMjkzNzUyOX0sIklwQWRkcmVzcyI6eyJBV1M6U291cmNlSXAiOiIwLjAuMC4wLzAifX19XX0_&Signature=ch~WD7z9cBluu3KWX2pIsmCd7pfVQ~WnM2QEg6wLuDPFi5pr2e4DnHApdAX9A92dxJW68WYllbKB1pNRkJ6RjtW~3eip545DnUcSBYGT1vfiaxNzp80QYsg~EUo~l4eHFYVoywXXPNgEPRXPIZ2vHGv7H7aeGJ5fbhzyunSmdstRnfUpfKLL5XmsDjpvVY4RYy1NSHHG70BU3y6UP1nqdu1hEdzBhRFKwZ~0uj8~2S4OF6Daaj71jkRWF49TQS~aNpvrkaAZojUilWEwppXZNcCekXu7Bt95oJDESsNQf0bu0gDw5eNtAfy2ZzN~a~lXVTV3ORy3kVanNwiVJzcf~g__&Key-Pair-Id=APKAIFKFWOMXM2UMTSFA
location has %3D: true
error: io.ktor.client.features.ClientRequestException: Client request(https://d29vzk4ow07wi7.cloudfront.net/d133d0ab57f0e1a996fa1367eb3e5c7ebbd1860a5d505a69791d7746457acb0a?response-content-disposition=attachment%3Bfilename=%22ForgeGradle-1.2-1.0.0-javadoc.jar%22&Policy=eyJTdGF0ZW1lbnQiOiBbeyJSZXNvdXJjZSI6Imh0dHAqOi8vZDI5dnprNG93MDd3aTcuY2xvdWRmcm9udC5uZXQvZDEzM2QwYWI1N2YwZTFhOTk2ZmExMzY3ZWIzZTVjN2ViYmQxODYwYTVkNTA1YTY5NzkxZDc3NDY0NTdhY2IwYT9yZXNwb25zZS1jb250ZW50LWRpc3Bvc2l0aW9uPWF0dGFjaG1lbnQlM0JmaWxlbmFtZSUzRCUyMkZvcmdlR3JhZGxlLTEuMi0xLjAuMC1qYXZhZG9jLmphciUyMiIsIkNvbmRpdGlvbiI6eyJEYXRlTGVzc1RoYW4iOnsiQVdTOkVwb2NoVGltZSI6MTYxMjkzNzUzMH0sIklwQWRkcmVzcyI6eyJBV1M6U291cmNlSXAiOiIwLjAuMC4wLzAifX19XX0_&Signature=XwmQYLdJSkb~0fNr36ebj1vzn1KXmufRtaP9Mj9y9thRAtpAbyImJU-31VhtEhV56ijN2-tBtT5m0rNPSq-f6AEvngoEZURUUpE-vGVb1UFwiGnVnTuDKQJUvao3gZTj-fq9kRCLosJGYJiVbLG3GTXQKYoxL9fQh2ttwS3eFKAyFylcjyvsmSkEAekomfjB8OhUpgc~B6CE0Vg6aOm3ZBaKNAtfX4~cccnFrz4PB836WD68y8qX9jN5IQMCAiDy0881chyPIjGM7c30aycANw5c8StHSRy~gWo5WL7TGpq19X5q2pK-sT8Vq0I3AJJZ95XW9N3GWj0WR7IKqOQTAg__&Key-Pair-Id=APKAIFKFWOMXM2UMTSFA) invalid: 403 Forbidden. Text: "<?xml version="1.0" encoding="UTF-8"?><Error><Code>AccessDenied</Code><Message>Access denied</Message></Error>"
error url: https://d29vzk4ow07wi7.cloudfront.net/d133d0ab57f0e1a996fa1367eb3e5c7ebbd1860a5d505a69791d7746457acb0a?response-content-disposition=attachment%3Bfilename=%22ForgeGradle-1.2-1.0.0-javadoc.jar%22&Policy=eyJTdGF0ZW1lbnQiOiBbeyJSZXNvdXJjZSI6Imh0dHAqOi8vZDI5dnprNG93MDd3aTcuY2xvdWRmcm9udC5uZXQvZDEzM2QwYWI1N2YwZTFhOTk2ZmExMzY3ZWIzZTVjN2ViYmQxODYwYTVkNTA1YTY5NzkxZDc3NDY0NTdhY2IwYT9yZXNwb25zZS1jb250ZW50LWRpc3Bvc2l0aW9uPWF0dGFjaG1lbnQlM0JmaWxlbmFtZSUzRCUyMkZvcmdlR3JhZGxlLTEuMi0xLjAuMC1qYXZhZG9jLmphciUyMiIsIkNvbmRpdGlvbiI6eyJEYXRlTGVzc1RoYW4iOnsiQVdTOkVwb2NoVGltZSI6MTYxMjkzNzUzMH0sIklwQWRkcmVzcyI6eyJBV1M6U291cmNlSXAiOiIwLjAuMC4wLzAifX19XX0_&Signature=XwmQYLdJSkb~0fNr36ebj1vzn1KXmufRtaP9Mj9y9thRAtpAbyImJU-31VhtEhV56ijN2-tBtT5m0rNPSq-f6AEvngoEZURUUpE-vGVb1UFwiGnVnTuDKQJUvao3gZTj-fq9kRCLosJGYJiVbLG3GTXQKYoxL9fQh2ttwS3eFKAyFylcjyvsmSkEAekomfjB8OhUpgc~B6CE0Vg6aOm3ZBaKNAtfX4~cccnFrz4PB836WD68y8qX9jN5IQMCAiDy0881chyPIjGM7c30aycANw5c8StHSRy~gWo5WL7TGpq19X5q2pK-sT8Vq0I3AJJZ95XW9N3GWj0WR7IKqOQTAg__&Key-Pair-Id=APKAIFKFWOMXM2UMTSFA
error url has %3D: false

After updating to 1.5.2 Android target doest work. But it is ok for iOS
at 1.4.3 is ok for both platforms iOS and Android.

MockEngine {
  // this code is not called on request as result mock doesn't work
}

Documentation for FormPart says
@param value content, could be [String], [Number] or [Input]
https://github.com/ktorio/ktor/blob/e03bafda3b3d72fcac166e46cf55e5d2d9383660/ktor-client/ktor-client-core/common/src/io/ktor/client/request/forms/formDsl.kt#L17
But later in this file Input is deprecated

   @Suppress("UNUSED_PARAMETER")
    @Deprecated(
        "Input is not reusable. Please use [InputProvider] instead.",
        level = DeprecationLevel.ERROR,
        replaceWith = ReplaceWith("appendInput(key, headers) { /* create fresh input here */ }")
    )
    public fun append(key: String, value: Input, headers: Headers = Headers.Empty) {
        error("Input is not reusable. Please use [InputProvider] instead.")
    }

And direct usage will cause exception

public fun formData(vararg values: FormPart<*>): List<PartData> {
...
    is Input -> error("Can't use [Input] as part of form: $value. Consider using [InputProvider] instead.")
...
}

It's deprecated and looks like TextEncoder and TextDecoder work on majority of environments.

Ktor 1.5.0
I am using CIO Engine which has a default timeout of 15000 milliseconds, however, I changed the timeout for a particular request using the HttpRequestBuilder.timeout extension function, but I still get ConnectTimeoutException after 15000 milliseconds.

Gradle:

dependencies {
    ....
   def ktorVersion = "1.5.0"
    implementation "io.ktor:ktor-client-core:$ktorVersion"
    implementation "io.ktor:ktor-client-cio:$ktorVersion"
    implementation "io.ktor:ktor-client-serialization:$ktorVersion"
    implementation "io.ktor:ktor-client-logging-jvm:$ktorVersion"
    ....
}

HttpClient:

HttpClient(CIO) {
    defaultRequest {
        host = HOST
        header("Content-Type", "application/json")
    }

    Logging {
        logger = object : Logger {
            override fun log(message: String) {
                Timber.i(message)
            }
        }
        level = LogLevel.ALL
    }
    install(HttpTimeout)
}

Request:

httpClient.post("${HOST_URL}/users/new") {
     timeout {
         requestTimeoutMillis = 30000
     }
     body = requestBody
}

STR: perform http GET with ktor Apache client to a resource which replies with truncated content

AR:

kotlinx.coroutines.JobCancellationException: Parent job is Cancelling; job=JobImpl{Cancelled}@eb5ab92
	at kotlinx.coroutines.JobSupport.getChildJobCancellationCause(JobSupport.kt:711)
	at kotlinx.coroutines.JobSupport.createCauseException(JobSupport.kt:717)
	at kotlinx.coroutines.JobSupport.cancelMakeCompleting(JobSupport.kt:692)
	at kotlinx.coroutines.JobSupport.cancelImpl$kotlinx_coroutines_core(JobSupport.kt:664)
	at kotlinx.coroutines.JobSupport.parentCancelled(JobSupport.kt:634)
	at kotlinx.coroutines.ChildHandleNode.invoke(JobSupport.kt:1465)
	at kotlinx.coroutines.JobSupport.notifyCancelling(JobSupport.kt:1500)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:897)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:860)
	at kotlinx.coroutines.JobSupport.cancelMakeCompleting(JobSupport.kt:693)
	at kotlinx.coroutines.JobSupport.cancelImpl$kotlinx_coroutines_core(JobSupport.kt:664)
	at kotlinx.coroutines.JobSupport.childCancelled(JobSupport.kt:648)
	at kotlinx.coroutines.ChildHandleNode.childCancelled(JobSupport.kt:1466)
	at kotlinx.coroutines.JobSupport.cancelParent(JobSupport.kt:358)
	at kotlinx.coroutines.JobSupport.notifyCancelling(JobSupport.kt:332)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:897)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:860)
	at kotlinx.coroutines.JobSupport.makeCompleting$kotlinx_coroutines_core(JobSupport.kt:803)
	at kotlinx.coroutines.JobImpl.completeExceptionally(JobSupport.kt:1326)
	at io.ktor.client.engine.apache.ApacheRequestProducer.failed(ApacheRequestProducer.kt:72)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.executionFailed(DefaultClientExchangeHandlerImpl.java:98)
	at org.apache.http.impl.nio.client.AbstractClientExchangeHandler.failed(AbstractClientExchangeHandler.java:426)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.exception(HttpAsyncRequestExecutor.java:163)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:276)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39)
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
	... 1 more
Caused by: org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 178; received: 0)
	at org.apache.http.impl.nio.codecs.LengthDelimitedDecoder.read(LengthDelimitedDecoder.java:89)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:52)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:18)
	at io.ktor.utils.io.ByteBufferChannel.writeAvailable(ByteBufferChannel.kt:1631)
	at io.ktor.utils.io.ByteWriteChannel$DefaultImpls.writeAvailable$default(ByteWriteChannel.kt:85)
	at io.ktor.client.engine.apache.ApacheResponseConsumer.consumeContent(ApacheResponseConsumer.kt:51)
	at org.apache.http.impl.nio.client.MainClientExec.consumeContent(MainClientExec.java:329)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.consumeContent(DefaultClientExchangeHandlerImpl.java:157)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:336)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265)
	... 10 more

ER: ConnectionClosedException is not masked

org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 178; received: 0)
	at org.apache.http.impl.nio.codecs.LengthDelimitedDecoder.read(LengthDelimitedDecoder.java:89)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:52)
	at io.ktor.client.engine.apache.ApacheResponseConsumer$consumeContent$1.invoke(ApacheResponseConsumer.kt:18)
	at io.ktor.utils.io.ByteBufferChannel.writeAvailable(ByteBufferChannel.kt:1631)
	at io.ktor.utils.io.ByteWriteChannel$DefaultImpls.writeAvailable$default(ByteWriteChannel.kt:85)
	at io.ktor.client.engine.apache.ApacheResponseConsumer.consumeContent(ApacheResponseConsumer.kt:51)
	at org.apache.http.impl.nio.client.MainClientExec.consumeContent(MainClientExec.java:329)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.consumeContent(DefaultClientExchangeHandlerImpl.java:157)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:336)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265)

Sometimes a log entry may appear at the "wrong" place (before or after expected) so the testLogResponseWithException and siblings are flaky.

CIO native selector doesn't select new descriptors and unable to stop when closing because cancelled interests are not processed as well.