in my

application.conf

i have

port = ${PORT}

this works fine on heroku and when this is set in the environment, but can i somehow set eg.

8080

as fallback ? could not find how to do that in the HOCON spec

Can I have 2 HOCON files for the based on the environment in which I am running(locally vs on Google cloud)? If so how do I tell the system which one to choose?

Hello trying to get ktor to work inside my kotlin multiplatform project but when i build my ios app using the shared library i get Unresolved reference io. i'm using gradle 6.0 and ktor 1.2.4 and kotlin 1.3.50 maybe it's a wrong combinaison of versions between kotlin ktor and gradle?

For use of the ktor client within an android app should we ever close the client? https://ktor.io/clients/http-client/call/requests.html For okhttp, we typically reuse one instance of the client throughout the app. Both clients have an initialization cost. Given that cost, it makes sense to me to leave the ktor client open for an application session. Are there any potential consequences?

Hi, I'm using ktor with Mutiplatform, when performing an HTTP POST from a background thread on iOS, I'm getting an exception about a global in ktor not annonated as SharedImmutable, that global is in

ktor-client/ktor-client-core/common/src/io/ktor/client/features/DefaultResponseValidation.kt

its name is:

ValidateMark

using 1.3.0-beta-2 tag, may I contribute a fix with it annotated as

@SharedImmutable

?

Am I missing some dependency? I'm trying to connect my ktor app to a MySQL database using Jetbrains Exposed Framework. According to the docs, this is how I should connect to the db, but then why is it unable to find the driver? Am I missing some gradle dependency?

Hi, is there any min versions requirement of jvm/android for ktor-server ? I'm having some issues with running latest version

1.3.0-beta-2

on android 4.4 and 5 and probably any other with jvm1.6, because of

java.lang.NoSuchMethodError: No virtual method toPath()Ljava/nio/file/Path; in class Ljava/io/File; or its super classes (declaration of '<http://java.io|java.io>.File' appears in /system/framework/core-libart.jar)

also with

1.3.0-beta-1

I'm getting following ktor-server-netty

java.lang.NoClassDefFoundError: io.ktor.application.ApplicationEvents$subscribe$1
        at io.ktor.application.ApplicationEvents.subscribe(ApplicationEvents.kt:22)
        at io.ktor.server.engine.BaseApplicationEngine.<init>(BaseApplicationEngine.kt:31)
        at io.ktor.server.engine.BaseApplicationEngine.<init>(BaseApplicationEngine.kt:21)
        at io.ktor.server.netty.NettyApplicationEngine.<init>(NettyApplicationEngine.kt:27)
        at io.ktor.server.netty.Netty.create(Embedded.kt:14)
        at io.ktor.server.netty.Netty.create(Embedded.kt:12)
        at io.ktor.server.engine.EmbeddedServerKt.embeddedServer(EmbeddedServer.kt:79)
        at io.ktor.server.engine.EmbeddedServerKt.embeddedServer(EmbeddedServer.kt:67)
        at io.ktor.server.engine.EmbeddedServerKt.embeddedServer(EmbeddedServer.kt:36)
        at io.ktor.server.engine.EmbeddedServerKt.embeddedServer$default(EmbeddedServer.kt:34)
        at com.scurab.android.anuitor.service.KtorServer.start(KtorServer.kt:50)
        ....

ktor-server-jetty

MethodHandle.invoke and MethodHandle.invokeExact are only supported starting with Android O (--min-api 26)

Does Ktor 1.2.5 support Kotlin 1.3.60/61?

Should the latests coroutines work with ktor 1.2.6 or should we always use the coroutines version depended on by ktor ?

I have an endpoint in ktor performing a long calculation. Is there any way to interrupt it in case the client connection is closed? I've tried a simple route test with a loop and delays and the coroutine is not cancelled if the client closes.

I’m trying to update to 1.3.0-rc, and it gives me the following error:

Unbound streaming [HttpResponse] is deprecated. Consider using [HttpStatement] instead

Is there a migration guide or something? I don’t see anything relevant in here: https://ktor.io/quickstart/migration/1.3.0.html

Hi, I am using ktor client on iOS and trying to move API requests to background thread, but get this error:

Trying to access top level value not marked as @ThreadLocal or @SharedImmutable from non-main thread
kotlin.native.IncorrectDereferenceException: Trying to access top level value not marked as @ThreadLocal or @SharedImmutable from non-main thread
        kfun:kotlin.Throwable.<init>(kotlin.String?)kotlin.Throwable + 87
        kfun:kotlin.Exception.<init>(kotlin.String?)kotlin.Exception + 85
        kfun:kotlin.RuntimeException.<init>(kotlin.String?)kotlin.RuntimeException + 85
        kfun:kotlin.native.IncorrectDereferenceException.<init>(kotlin.String)kotlin.native.IncorrectDereferenceException + 85
        ThrowIncorrectDereferenceException + 137
        CheckIsMainThread + 25
        kfun:io.ktor.http.<get-URL_ALPHABET_CHARS>#internal + 35
        kfun:io.ktor.http.encodeURLPath@kotlin.String.()kotlin.String + 717
        kfun:io.ktor.http.takeFromUnsafe$ktor-http@io.ktor.http.URLBuilder.(kotlin.String)io.ktor.http.URLBuilder + 2278
        kfun:io.ktor.http.takeFrom@io.ktor.http.URLBuilder.(kotlin.String)io.ktor.http.URLBuilder + 263

My code is

...
withContext(workerDispatcher){
    val loginResponse = <http://client.post|client.post><LoginNetworkResponse>("$apiEndpoint/init/auth?v=1") {
            contentType(ContentType.Application.Json)
            body = LoginNetworkRequest(
                ...
            )
        }
   ....
}

asked earlier about ktor support for watchOS - looks like it was not available then and is available now. Tried it, and getting this error - kotlin.IllegalStateException: Failed to find HttpClientEngineContainer. Consider adding [HttpClientEngine] implementation in dependencies. Here is my sourceset, what lib do I need to add?

sourceSets["watchosMain"].dependencies{
    implementation("org.jetbrains.kotlin:kotlin-stdlib-common:1.3.61")
    implementation ("org.jetbrains.kotlinx:kotlinx-coroutines-core-native:1.3.3")
    implementation ("org.jetbrains.kotlinx:kotlinx-serialization-runtime-native:0.14.0")
    implementation ("io.ktor:ktor-client-core-native:1.3.0-rc")
    implementation ("io.ktor:ktor-client-json-native:1.3.0-rc")
    implementation ("io.ktor:ktor-client-serialization-native:1.3.0-rc")
    implementation ("io.ktor:ktor-client-ios:1.3.0-rc")
    implementation ("io.ktor:ktor-client-cio:1.2.5")

}

Is there any built in support for cron jobs in ktor?

Hi, I just started backend with Ktor framework, I see documentation about ktor but there is no help about Database Connectivity and Staf like that So any Guide about Database Connection? @hhariri @Shan @Adriano Celentano

Anyone have any suggestions on the best hosting site for ktor? I'm working with Heroku now but really don't like it

Is there any gradle plugin for auto generating objects for exposed from sql schema?

Did anyone struggle with

kotlinx-serialization

? I’m using

0.14.0

, and I’m gettin pretty randomly

java.lang.NoClassDefFoundError:

, some time it works, some time it doesn’t 🤷

i have added this to my build file

implementation("ch.qos.logback:logback-classic:1.2.3")

per https://ktor.io/servers/logging.html, but still get the warning SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

I maintain a Kotlin HTML Library, and one of the modules I provide involves integration with ktor. In use, I’m seeing exceptions eaten, and I think it has to do with my improper use of

OutgoingContent

. In the below linked code, the exception is happening inside of the

func

parameter after it’s been called. My guess is that at that point the return status code has already been chosen, which is too late, and why the exception handlers are ignored. https://github.com/ScottPierce/kotlin-html/blob/master/kotlin-html-ktor/src/main/kotlin/dev/scottpierce/html/ktor/RespondHtml.kt#L41-L58 The obvious solution is to write to a

StringBuilder

, then give the output

String

to the

ByteWriteChannel

, instead of writing directly to the

ByteWriteChannel

. I thought I’d ask: Is there is a better way I can handle this that I haven’t considered?

What is the recommended way to pass values (e.g. request headers or authentication) from ktor server to ktor client instances? Is there a simple context object that you can access globally or do I need to pass down any information manually? Or what is the recommended way?

Is there a memory monitor graph in intellij for seeing real time heap usage similar to what we have in Android Studio or in the Heroku dashboard? Or is there a recommended plugin? I tried out an application called VisualVM but the memory usage I see for an application does not line up with what I see on our heroku metrics dashboard.

📣 Finally, we have the last release candidate,

1.3.0-rc2

It’s time to test and migrate, the final release is coming after New Year Holidays. See the migration page: https://ktor.io/quickstart/migration/1.3.0.html 🎄 Please note that we have long New Year Holidays here so no worries if we don’t respond quickly.

Hi, guys. I’m looking into ktor-client samples. Is it correct that ktor-client in it’s iOS example does the work in main (UI) thread (

dispatch_get_main_queue()

): https://github.com/ktorio/ktor-samples/blob/86832e4fcfeb4de9da12b2ed3a0eaa0bed9795ab/mpp/client-mpp/src/iosMain/kotlin/io/ktor/samples/mpp/client/Dispatcher.kt#L7 Does it mean all networking (by ktor-client) happens in main thread actually? Android’s in contrast is executed in background thread (pooled) (

Dispatchers.Default

): https://github.com/ktorio/ktor-samples/blob/86832e4fcfeb4de9da12b2ed3a0eaa0bed9795ab/mpp/client-mpp/src/main/java/io/ktor/samples/mpp/client/ApplicationDispatcher.kt#L5

Hello, JB gurus, does ktor have websocket api for IOS now?

Client seems to be missing JS dependencies on 1.3.0-rc

Is there a way to run Cron Jobs with Ktor? My end objective is to host a Cron Job written with Kotlin for the Coinverse Android app's backend service to populate data. Much appreciated! 🙏 https://stackoverflow.com/questions/59516599/how-to-run-cron-jobs-in-kotlin-ktor Also, Google has an interesting alpha outside of Ktor that could be a good alternative for running timed tasks to populate data, Using Kotlin with Google Cloud Functions: https://github.com/GoogleCloudPlatform/kotlin-samples/tree/master/functions

is

io.ktor:ktor-client-auth

ready for native?