I upgraded to ktor 1.0.1 and now consistently get

java.util.concurrent.CancellationException: Channel has been cancelled

from the ktor client, using CIO, with the same code that used to work with 1.0.0. Anyone else experienced this?

Hello. [lazy mode] Is there a ready-to-use comments widget for ktor?

Not really a ktor specific question, but it's in ktor context. We ported our service to ktor from servlet based framework, but we didn't touch any business code which contains blocking calls to db and other http services, do we just need to wrap those calls into

withContext

suspending calls to leverage coroutines better?

If I follow what is described there, then I am unable to find any instances of

MockEngine

Related to the documentation, I can only create

MockEngine

like so

MockEngine.invoke

. Otherwise it keeps referencing to the constructor

Hello. I'm trying to use the ktor client, and in the samples I found the following call:

val call = call {
        url(URL(url))
        method = HttpMethod.Get
}

Where is

URL

defined? IntelliJ is having a hard time finding it.

Hi everyone, Ktor is from what I understand a microframework and comparing it with Spring Boot is like mixing apples and oranges. Nonetheless I need some information for a framework shootout tomorrow in a project for one of our customers, and some of my colleagues including myself would appreciate using Kotlin with Ktor. I would like to know if "Exposed" is the preferred framework for DB access in the Ktor ecosystem. And are there any plans to provide some way to generate OpenAPI (Swagger) documentation based on the Routes used in Ktor? Thanx in advance...

I use ktor client + kotlin-native + kotlinx-serialization and i'm getting following error on ios side:

io.ktor.client.call.ReceivePipelineException: Fail to run receive pipeline

ext.kotlin_version = '1.3.10'
    ext.coroutines_version = '1.0.1'
    ext.ktor_version = '1.0.1'
    ext.serialization_version = '0.9.1'

I have proposed a change in the samples page: https://github.com/ktorio/ktorio.github.io/compare/master...nikhilgupta16:patch-1

Is there a module to auto generate swagger json, something like https://github.com/springfox/springfox ?

Hi! I’ve seen a memory leak when we migrated from kotlin 1.2 with 0.x-coroutines and 0.9.5-ktor to kotlin 1.3, 1.0 coroutines and 1.0.1 ktor. I’ve been running a lot of memory profiling and narrowed it down ot our HttpClient. The memory leakage seems to be a lot of char[] . We have a class which acts as a http client. This class is called from another class with GlobalScope.launch {} (this was previously just launch) and is sending about 600 requests per second (but sometimes peaks at 1400 rps). With ktor 0.9.5 we had this working for a few months. I’m now looking for help since it’s not much code left that is in our control but maybe we have used it wrong. Anybody see something fishy in the code below or know about any known issue with the HttpClient? This is our httpClient which leaks memory.

import our.company.toJsonString
import our.company.ApplicationMetrics
import io.ktor.client.HttpClient
import io.ktor.client.engine.apache.Apache
import io.ktor.client.engine.config
import <http://io.ktor.client.request.post|io.ktor.client.request.post>
import io.ktor.client.response.HttpResponse
import org.slf4j.LoggerFactory

class UpdateClient(
    baseUrl: String
) {
    private val logger = LoggerFactory.getLogger(UpdateClient::class.java)
    private val client = HttpClient(Apache.config {
        socketTimeout = 30_000
        connectTimeout = 30_000
    })
    private val updateUrl = "$baseUrl/shared"

    suspend fun postUpdates(updates: List<Update>) {
        try {
            val payload = updates.toJsonString()
            <http://client.post|client.post><HttpResponse>(updateUrl) {
                body = payload
            }
            ApplicationMetrics.updatesSent.labels("true").inc(updates.size.toDouble())
        } catch (e: Exception) {
            logger.error("Could not post updates", e)
            ApplicationMetrics.updatesSent.labels("false").inc(updates.size.toDouble())
        }
    }
}

The service that calls this looks something like this

fun businessLogic(urls: List<Url>) {
        runBlocking {
            val urlsInDynamo = urls.map { url ->
                GlobalScope.async {
                    try {
                        val result = dynamoClient.increaseSharesAsync(url)
                        Update(result.attributes()["aString"]?.s()!!, result.attributes()["aValue"]?.n()!!.toLong())
                    } catch (e: Exception) {
                        logger.warn("Unable to write get result from the update to dynamo", e)
                        null
                    }
                }
            }.awaitAll().filterNotNull()

            if (urlsInDynamo.isEmpty()) {
                throw RuntimeException("Non of the urls were updated in Dynamo")
            }

            // Fire and forget
            GlobalScope.launch {
                val updates = urlsInDynamo
                    .groupBy { it.aString }
                    .map {
                        it.value.maxBy {
                            it.value
                        }!!
                    }
                    .toList()
                // This is where we call the update client at about 600 rps
                updateClient.postUpdates(updates)
            }
        }
    }

And the data class and extension we use

fun Any.toJsonString(pretty: Boolean = false): String {
    return DefaultObjectMapper
        .let { if (pretty) it.writer(SerializationFeature.INDENT_OUTPUT) else it.writer() }
        .writeValueAsString(this)
}

data class Update(val aString: String, val aValue: Long)

I'm trying create my first code Kotlin using Ktor. I installed Jetty, and works ok. I useing this exemplo to create my first test: https://github.com/ktorio/ktor-samples/tree/master/deployment/jetty-war But when run gradlew I have ths error message:

./gradlew :teste:run

FAILURE: Build failed with an exception.

* What went wrong:
Project 'teste' not found in root project 'teste'.

* 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 0s

This is my gradle file:

buildscript {
    ext.gretty_version = '2.0.0'
    ext.kotlin_version = '1.3.11'
    ext.ktor_version = '1.0.1'

    repositories {
        mavenCentral()
        jcenter()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.akhikhl.gretty:gretty:$gretty_version"
    }
}

plugins {
    id 'java'
    id 'org.jetbrains.intellij' version '0.3.12'
    id 'org.jetbrains.kotlin.jvm' version '1.3.0'
}

apply plugin: 'kotlin'
apply plugin: 'war'
apply plugin: 'org.akhikhl.gretty'


webAppDirName = 'webapp'

gretty {
    contextPath = '/'
    logbackConfigFile = 'resources/logback.xml'
}

sourceSets {
    main.kotlin.srcDirs = [ 'src' ]
    main.resources.srcDirs = [ 'resources' ]
}

repositories {
    jcenter()
    maven { url "<https://kotlin.bintray.com/ktor>" }
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    compile "io.ktor:ktor-server-servlet:$ktor_version"
    compile "io.ktor:ktor-html-builder:$ktor_version"
    compile "ch.qos.logback:logback-classic:1.2.3"
}

kotlin.experimental.coroutines = 'enable'

task run

afterEvaluate {
    run.dependsOn(tasks.findByName("appRun"))
}

where i'm worong?

currently I have one page, which shows a list of "available plugins" that each can be configured with a few fields, and the list of "currently configured plugins". The page uses a bit of CSS and Javascript.

Guys, hello, Im using this framework to create auth2 server with ktor. But i dont understand how can i access methods for auth (Oauth2TokenService class, that i install as a feature) in my endpoints. https://github.com/myndocs/kotlin-oauth2-server Can someone look in it, please

Well, it's an epic fail, JTwig doesn't work either on Android...

Or just generate the HTML yourself. One page? Sounds like a lot of work for something trivial...

I'm gonna try this one first: https://github.com/fizzed/rocker 😂 (yes I really really don't want to have this html page in the middle of my code)

is there an example of deserializing a requests body?

I just tried upgrading to ktor 1.1.0. I can no longer call

install(Authentication) {

in the context of

Application

. How should I be doing this now?

Getting Program type already present: org.slf4j.impl.StaticMDCBinder when trying to compile an android app with 1.1.0 I'm using implementation "io.ktor:ktor-client-core-jvm:$ktor_version" implementation "io.ktor:ktor-client-json-jvm:$ktor_version" implementation "io.ktor:ktor-client-logging-jvm:$ktor_version" implementation "io.ktor:ktor-client-okhttp:$ktor_version" on the JVM side. Maybe because logging-jvm uses an older version of slf4j-simple which has a dependency on a different org.slf4j😒lf4j-api:1.6.1 version than all the other libraries?

Can't compile 1.1.0 for iOS - can it be a case sensitivity issue? Using presets.iosX64 (for simulator) it wouldn't compile due to this error:

Could not resolve all files for configuration ':common:iosCompileKlibraries'.
> Could not find io.ktor:ktor-http-iosx64:1.1.0.

It searches for this URL: https://dl.bintray.com/kotlin/ktor/io/ktor/ktor-http-iosx64/1.1.0/ktor-http-iosx64-1.1.0.module which results in a 404 error, while the one with X64 instead of x64 does exist https://dl.bintray.com/kotlin/ktor/io/ktor/ktor-http-iosX64/1.1.0/ktor-http-iosX64-1.1.0.module

Hello, World! And Merry Xmas 🙂 I'm trying the kotlinx.html integration now. Is there a way to add custom attributes to a tag? In my case, I need to add a

defer

attribute to a

script

tag.

for some of my request sometimes I receive a fatal error: io.ktor.features.UnsupportedMediaTypeException: Content type / is not supported. I tried to wrap a request receiver method in try-catch block, but it happens somewhere early. Ktor version 1.0.0

Could someone take a look at this WebSocket test case? The function

handleWebSocketConversation

blocks the execution forever, so the test does not finish.

where did HttpStatusCode go?

Are ios artifacts now published separately per architecture? I can’t resolve

io.ktor:ktor-client-core-ios:1.1.1

,

io.ktor:ktor-client-json-ios:1.1.1

, or

io.ktor:ktor-client-mock-ios:1.1.1

, but using

iosx64

instead of

ios

works fine. Oddly I have no issue with

io.ktor:ktor-client-ios:1.1.1

.

Some questions: 1. There’s a bunch of

META-INF

files which were giving me build issues until I added this line: https://github.com/russhwolf/ktor-demo/blob/master/app/build.gradle#L27. I know I’ve seen other such issues in the past and they’ve been fixed. Is this a known issue currently? 2. Is the strategy I’m using to dynamically switch between x64 and arm64 dependencies sane? Also is it necessary, or did I miss something?

Coming Ruby Rails where I can use the

dotenv

gem to store environment variables in a

.env

file then override them on the server with proper env variables, is there a good alternative for Kotlin/Ktor? Or a standard way of achieving the same thing?

Reduced JDK7/8 dependencies

does it mean you guys are moving in multiplatform direction?