Hey everyone, I am new in ktor. I am trying to use KMM in my android and ios project. In my project there is bunch of api call through retrofit with okhttp3. I don't want to change previous retrofit. Now I want to use ktor for new feature api call only so I can share business logic with ios project. I wonder can I use okHttp3 or I can use only ktor http client?

What is the recommended configuration for using GraphQl with Ktor 2.0? Some libraries like KGraphQl only support Ktor 1.x. Are there any plans by the Ktor team to offer a GraphQl plugin?

I've received this error:

java.lang.NoSuchMethodError: java.nio.ByteBuffer.position(I)Ljava/nio/ByteBuffer;

After trying to make a request to this endpoint:

post("/home") {
    call.sessions.set(UserSession(id = "123", name = "Name"))
    call.respondRedirect(Endpoint.Authorized.path)
}

I'm using 2.0.0-beta-1 version.

I'm using ktor cli. Is there a way to create a fake of

HttpResponse

? I would like to use it to test a function that receives an

HttpResponse

and returns a

Result

. I know that I could use

MockEngine

to create a

HttpResponse

but it feels too much. I'm assuming that

HttpResponse

is something similar as

Response

in

Retrofit

. And there I could use

Response.error()

or

Response.success()

to create fakes.

Anyone would be willing to mentor me on learning Ktor 1(server) with Exposed ? I’m willing to pay. Please send PM. I’ve accomplished a lot so far by myself but I can’t figure out how to set a oneToMany relationship with exposed, I’d need help with Koin and I’d like to get code reviews/tips. You can view my learning project here : https://bitbucket.org/danygiguere/ktor_1_demo/src/master/

I have a ktor plugin that supports version 1.6. I'm looking to update it to support ktor v2. Is their any migration guide for this? I've seen the API changes but im most interested in what it takes to make my plugin native compatible. I believe I need a .api file like this but not sure how I can generate this. Any pointers or examples would be appreciated 😄

If I'm starting a new project in Ktor for learning purposes should I use Ktor-2.0?

Any chance for https://github.com/ktorio/ktor/tree/main/ktor-server/ktor-server-plugins/ktor-server-html-builder to support native with the ktor 2.0.0 release?

I am looking for simple token based authentication in Ktor server. Is there a provider for it? Basically I need to get the token from Authorization header and process it in validate function.

I can't find this in the docs or google... say i have a api with url https://exampleapi.com/{param1}/info How do I create a request so that I insert the param1 parameter in a safe url-encoded way? Do I need to encode it manually?

Does Ktor client for iOS support background uploads/downloads, and if not, is this planned?

Am I wrong or https://github.com/aymanizz/ktor-i18n isn’t supporter on Ktor 1 anymore ? When I try installing the dependency, I get this error :

app.demo:test: Could not find com.github.aymanizz:ktor-i18n:1.0.0.

Are there plans to make shared ktor server stuff multiplatform? I use

testApplication

to test ktor client stuff, because I really don't like the ktor client mock api and with

testApplication

I can re-use type safe routes (

@Resource

). The problem is, that

testApplication

is only available for jvm and native and so I cant't test the client code on other platforms.

Hi all, How can one pass a data class as a parameter so that ktor-client can return that class type? I can force val result: MyClass = apiclient.post(…) but I want MyClass to be flexible, thanks

Hey, I'm having some trouble with kotlinx.serialization, I defined a class to deserialize a request, annotated it with Serializable and then from inside a route I'm calling call.receiveOrNull<MyRequest>() But insted of null I'm getting an exception when the request is bad formed. Is this the expected behavior? And if yes what's the point of receiveOrNull?

What are the differences between HttpClient(CIO) and HttpClient(OkHttp) with regards to ktor-client not server? Thanks

Hi Ktor Team 👋 I’m the lead of #koin project. I’m wondering if you will continue to publish new 1.x versions? Just to know if next version of Koin will go with Ktor 2 or if we need to serve both 1.x & 2.x versions

How do I respond with an image when the ContentNegotiation feature is installed?

I'm upgrading

Ktor 2

from an EAP version to

2.0.0-beta-1

The EAP version was available at https://maven.pkg.jetbrains.space/public/p/ktor/eap/io/ktor/ but that doesn't seem to be the case of the beta version nor is it published on mavenCentral() Am I missing something?

are there any plans to use KSP for the resources plugin in 2.x? To e.g. get compile time safety for parameters, maybe be able to omit parent

Hi, I changed from ktor-client

1.6.7

to

2.0.0

because

1.6.7

doesn't work on

iosArm64

. Now I get this error:

Could not find org.jetbrains.kotlin:kotlin-stdlib-common:1.6.20-M1-106 Required by: project: shared.

Any ideas?

Hey there, this is probably a newbie question, but since it’s related to ktor: To get this code below working…why do I have to import both

io.ktor.server.application.call

and

io.ktor.server.response.respondText

? What is it about the

call

property that requires both imports? I would have thought just importing

io.ktor.server.application.call

is enough. Then calling

call.respondText()

is ok, but I get an Unresolved Reference error if I dont include the other import.

package com.mobilecoin.plugins

import io.ktor.server.application.Application
import io.ktor.server.application.call
import io.ktor.server.response.respondText
import io.ktor.server.routing.get
import io.ktor.server.routing.routing

fun Application.configureRouting() {

    // Starting point for a Ktor app:
    routing {
        get("/") {
            call.respondText("Hello World!")
        }
    }
    routing {
    }
}

Thanks!

Hi; any idea why the IntelliJ services tools window fails to show any ktor projects (built with 2.0.0-beta, if that makes a difference) ?

This is interesting. One of my ktor tests is hanging indefinitely. If I pause in the debugger I can see that it’s hung trying to write some bytes to the output stream. This just started happening and I’m unsure why. At first I thought it was because nobody was consuming the response body but that isn’t the case I think. The test uses the test application which I believe reads the entire body. This is the test in question:

withTestApplication({ module(config) }) {
    assertEquals(
        HttpStatusCode.Unauthorized,
        handleWebSocket("/some/path") {
            addHeader(HttpHeaders.Authorization, "Bearer invalid")
        }.response.status()
    )
}

Hi all, i am trying to stream redis pub sub messages to a websocket connection with this code

webSocket("/receive/{channel}") {
    val messageFlow: Flow<String> = callbackFlow {
    val jedis = jedisPool.resource

    jedis.subscribe(object : JedisPubSub() {
        override fun onMessage(channel: String, message: String) {
            trySendBlocking(message)
        }
    }, channel)

    awaitClose {
        jedis.close()
    }
}


messageFlow.cancellable().collect { message ->
    send(message)
}
 print("Websocket closed")
}

The issue is when the client closes the socket i never see the Websocket closed message, I presume the messageFlow isnt being cancelled? Is there a solution to this?

Hi everyone, already reported this error in YouTrack but wanted to know if someone faced a similar issue and how they solved it: https://youtrack.jetbrains.com/issue/KTOR-4002

Hi all, im using ktor 2.0.0-eap-317 (the only version that seems to work properly with HttpCache for ios and android). I have some unit tests from previous version of ktor 1.6.6, where i check for request exceptions around 404, 308, etc. But those tests now fail

but was io.ktor.client.call.NoTransformationFoundException: No transformation found: class io.ktor.utils.io.ByteBufferChannel -> class com.a.mp.networking.TestData

So sending a request asking for a json object response but then i tell my test engine client to respond with a 404 error, but instead it seems to be trying to serialise the 404 error.

Hi I am trying to fix some performance issues with Ktor's HttpClient with curl engine for Kotlin/Native but I am not sure how to proceed from here I noticed that the http calls to localhost take above 100ms, even though the server can respond in 2ms or less Reproducing the issue locally and running it a few times (even though I am using very primitive tools to measure the performance) shows that it does indeed run very slow https://paste.ofcode.org/GYkS6PnEjvjHn9U8Baw6eQ

expected: 11852
actual:   11850
average:  118.5
min:      105
max:      128

running similar code in Java (using a different http client though) results in the following

expected: 94
actual:   74
average:  0.74
min:      0
max:      25

How can I figure out where this overhead comes from? And how can I solve it?

Hello, I followed the Kotlin full-stack web app tutorial to make my web app, and I am now working on deploying it to Heroku. I used MongoDB Atlas to connect Heroku and my database, and the code used is very much the same in the tutorial itself. I encountered a problem where when I POST through the frontend, I receive a 403 error. The strange thing is, GET and DELETE requests work just fine, and even when I POST with something like curl, it works perfectly! The only problem is that POST doesn't work from the frontend. When this function is called from the frontend:

suspend fun addShoppingListItem(shoppingListItem: ShoppingListItem) {

    <http://jsonClient.post|jsonClient.post><Unit>(endpoint + ShoppingListItem.path) {


        contentType(ContentType.Application.Json)
        body = shoppingListItem

    }

}

This is what the server does when it receives a POST request:

post {

    collection.insertOne(call.receive<ShoppingListItem>())
    call.respond(HttpStatusCode.OK)

}

but this is what I get every time I perform a POST request through my browser. Are there any help or docs I might be able to benefit from?