Do websockets work in 1.5.0? I am sending a Frame, but the client is not receiving it.

I have enabled

development = true

in the

application.conf

file and I can see stack-traces in the console. Now I wonder is there any way to print into console all requests and responses (including returned data like JSON and http codes) ?

Hi guys ..has anyone found a way to build an authentication feature that wraps around firebase on ktor

Hello everyone! It seems that the docs has some issues that I found: 1. The routing path parameters documentation is missing (Example: How Ktor demonstrates how

/test/{param}

works, stuff like that, here: https://web.archive.org/web/20200611221212/https://ktor.io/servers/features/routing.html) 2. The AutoHeadResponse docs requires a dependecy that doesn't exist, but AutoHeadResponse is automatically included in Ktor! I would've reported this in the correct location, but I can't find the repository that has Ktor's docs! (Only the API stuff seems to be in a repository, not the docs themselves) Thank you 🙂

How to run Ktor application from cmd?

hello 👋 are there any migration guides from 1.3.x -> 1.4/1.5? looks like some of the artifacts got renamed and no longer resolve

why take a HttpResponse from a download link would take a long time?

val client = HttpClient(CIO) {
        followRedirects = false
    }
        val _result = client.get<HttpResponse>(addr)
        val readInputStream = client.get<InputStream>(_result.headers["LOCATION"]?:"")
//        val count = client.get<HttpResponse>(_result.headers["LOCATION"]?:"")

the comment line would take 20 seconds

httpClient.put<ByteArray>(realUrl){
            body = "aha".toByteArray()
        }

this code can upload data to a link, now I need to get upload progress, how to use a outputStream to instead of this way to upload data?

val _outputStream = httpClient.put<HttpResponse>(realUrl)
        val outputStream = _outputStream.receive<OutputStream>()

        outputStream.write("abc".toByteArray())
        outputStream.flush()
        outputStream.close()

this won't work, error message o.ktor.client.call.NoTransformationFoundException: No transformation found: class io.ktor.utils.io.ByteBufferChannel (Kotlin reflection is not available) -> class java.io.OutputStream (Kotlin reflection is not available)

1 : Does Ktor plan on adding GraalVM to their official doc like they greatly did with Docker? 2 : What is the current support for Ktor + GraalVM (native image) ? Do you guys know where I can find more up-to-date resources to get started? I couldn't get a hello world to work last time. Or do you guys know any other solution to address the deployment size (JVM-related concern).

val outputStream = httpClient.put<ByteWriteChannel>(realUrl).toOutputStream()
        outputStream.write("abc".toByteArray())
        outputStream.flush()
        outputStream.close()

why this won't put data to that link? but with httpurlconnection is ok

Hey guys, can someone explain to me how the proper closing of sockets in ktor should look like? I have something like:

override suspend fun <T> openConnection(socketAddress: InetSocketAddress, block: suspend (Socket) -> T): T {
    val socketJob = Job()
    var selectorManager: SelectorManager? = null
    var socket: Socket? = null
    try {
        selectorManager = ActorSelectorManager(socketJob + coroutineContext)
        socket = aSocket(selectorManager)
            .tcp()
            .connect(socketAddress) {
                socketTimeout = 10_000
            }
        return block(socket)
    } finally {
        withContext(NonCancellable) {
            selectorManager?.close()
            socket?.close()
            socketJob?.complete()
        }
    }
}

The channels opened in block() are closed in all cases. What I’m observing (attached the screenshots) is that shutdownOutput() is sent, so the client socket gets into the FIN_WAIT_1, but there is no way for me AFAIK to wait for the whole 4-way TCP close to properly finish, so I end up with server socket that is still open and doesn’t know the client is dead. Sometimes the server sockets ends up in the CLOSE_WAIT as well. I’ve checked the timeout tests in https://github.com/ktorio/ktor/blob/master/ktor-client/ktor-client-java/jvm/test/io/ktor/client/engine/java/RequestTests.kt#L52 and if you place a breakpoint after

runBlocking

, I’m seeing the same socket behaviour. Is it something that I’m missing or there is a problem in ktor? 🙂 thanks

Hello Ktor team! I was hoping I could get your attention in this post, please. I wonder if you could shed some light on whats going on. https://kotlinlang.slack.com/archives/C9EJFT6DB/p1610747171006700?thread_ts=1610747171.006700&cid=C9EJFT6DB

Is it possible to implement an interface to describe my routing in Ktor? (I'd like to share e.g. a UserApi interface between my frontend and backend.)

Hi, I am using kotlinx.serialization ContentNegotiation and my response have the following hierarchy:

sealed class A () 
data class B(val name) : A()
data class C(val name): A()

My endpoint returns a List<A> and according to https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/polymorphism.md#sealed-classes I would expect the following format:

[
  {
	"type": "com.A",
	"name": "name"
  }
]

And I am getting this format when Log the response object. Unfortunately, I got another response format when calling the endpoint:

[
  [
	"com.A",
	{
	  "name": "name"
	}
  ]
]

Any ideas why this different format appears when responding with call.respond(object)?

Does ktor have a common exception that it throws for io exceptions, like request timeouts, or networking issues?

After upgrading to 1.5.0 (from 1.4.3) I got this error:

Caused by: kotlinx.serialization.SerializationException: Class 'ArrayList' is not registered for polymorphic serialization in the scope of 'Collection'.

Partial stacktrace:

kotlinx.serialization.SerializationException: Class 'ArrayList' is not registered for polymorphic serialization in the scope of 'Collection'.
Mark the base class as 'sealed' or register the serializer explicitly.
	at kotlinx.serialization.internal.AbstractPolymorphicSerializerKt.throwSubtypeNotRegistered(AbstractPolymorphicSerializer.kt:103)
	at kotlinx.serialization.internal.AbstractPolymorphicSerializerKt.throwSubtypeNotRegistered(AbstractPolymorphicSerializer.kt:113)
	at kotlinx.serialization.PolymorphicSerializerKt.findPolymorphicSerializer(PolymorphicSerializer.kt:96)
	at kotlinx.serialization.internal.AbstractPolymorphicSerializer.serialize(AbstractPolymorphicSerializer.kt:32)
	at kotlinx.serialization.json.internal.StreamingJsonEncoder.encodeSerializableValue(StreamingJsonEncoder.kt:223)
	at kotlinx.serialization.json.Json.encodeToString(Json.kt:73)
	at io.ktor.serialization.SerializationConverter.convertForSend(SerializationConverter.kt:118)
	at io.ktor.features.ContentNegotiation$Feature$install$2.invokeSuspend(ContentNegotiation.kt:146)
	at io.ktor.features.ContentNegotiation$Feature$install$2.invoke(ContentNegotiation.kt)

Hello, Hope you are all okay. If you can please take some time and help me figure out what I am doing wrong. So, I have this

install(CORS) {
    method(HttpMethod.Options)
    method(HttpMethod.Patch)
    method(HttpMethod.Delete)
    header(HttpHeaders.XForwardedProto)
    anyHost()
    header(AccessControlAllowOrigin)
    header(AccessControlAllowMethods)
    header(AccessControlAllowCredentials)
    header(AccessControlAllowHeaders)
    header(AccessControlRequestMethod)
    header(AccessControlRequestHeaders)
    header(AccessControlExposeHeaders)
    header(AccessControlMaxAge)

    allowCredentials = true
    maxAgeInSeconds = 1000
    allowNonSimpleContentTypes = true
}

But I still get this, when I run on the browser. What am I doing wrong? All I need is this request to work

Access to fetch at '<http://192.168.43.218:9010/v1/authorization/user-roles/all>' from origin '<http://localhost:8080>' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

Currently on: ktor 1.4.3 Kotlin: 1.4.21

How should we handle youtrack issues that are marked fixed, but that we have more comments or concerns about? Should I make a new issue and reference the original? Here is the one I am referring to specifically: https://youtrack.jetbrains.com/issue/KTOR-455

Is there a way I can check the md5 checksum for a file I downloaded with ktor?

hi, is there a way to attach interceptor after

call.respond

is called? Lets say I want to log something on calls with specific status codes.

Hello guys! I'm trying to use

Server-Sent Events

with

Ktor

, does anyone have an example? Because I didn't find anything enlightening. I can send the event, but I can't consume it.

Hello everyone! We are about to build some new applications in our company to support external APIs. The first of them should be quite small and I was trying to convince people to use Ktor for it. We are already using Kotlin as a primary language even in our big monolithic app so I kind of sense that it would be better to use something more natural to Kotlin. I've been told that Ktor is a cool thing but not suitable for company like us, because people would have to have some initial knowledge about it and because Ktor is very small and lacks things like CDI so there are some strong opinions that we should stick with Spring Boot mainly because of our developer base. But I don't like Spring and the annotation-driven programming and all the magic.. Would you help me to collect some good arguments for using Ktor (+Exposed) instead of SpringBoot (+Hibernate)? I really think we have good oportunity for our devs to get in touch with it, but I need to convince them.. 😄

We use basic auth but after installing a StatusPages handler for HttpStatusCode.Unauthorized I no longer get a challenge when accessing the protected urls. Any hints for fixing this ? Maybe its a bug ?

If I’d write a custom

HttpClientEngine

, is there any way I can run the ktor test suite on them? Those tests do not happen to get published to maven, or? There’s

ktor-client-tests*

but it doesn’t contain the actual test cases, right?

Is it possible to secure an api endpoint using OAuth and Ktor? I’m trying to use Postman to call my endpoint but Kto keeps trying to redirect to my OAuth server to request a token. I have the Bearer token setup in Postman and it is sending it along in the POST request. Setup details in thread ->

Hi. I’m having issue when send multipart data SerializationException: Serializer for class ‘MultiPartFormDataContent’ is not found

I have a simple question. Can I execute ktor server without IntelliJ IDE?

Hey guys! I have a ktor backend and I put all my different routes into packages that should not depend that much on each other. Therefore i was thinking, why don't i experiment with microservices! Does anyone have any good articles on that topic? How to setup a system, which tools to use, anything in that direction would be helpful :) i now mostly find articles about ktor itself (with for some reason microservice in the title) and not much about how to deploy n-amount of services with routing to all of them.

Hei. I am trying to use Ktor CIO client to make request to server that uses TLSv1.2 with

ECDHE-RSA-AES256-GCM-SHA384

as cipher suite. But I get http handshake failure, if I use Apache as engine it works. I thought this was fixed here : https://github.com/ktorio/ktor/issues/439 Can someone help me please ?

I’m trying to download a file directly to disk with ktor. I’m using the ktor streaming api, but I’m still seeing my memory on device go from 64MB to 200+MB (about the size of the file) while the large file is downloading. What am I doing wrong? Code in thread.