kotlinlang #ktor

Hello All! I’ve got an issue running a JS script for a route in #ktor . Indeed, whatever syntax I use or whater location I put the static files, I cannot manage to get anything else than a 404 not found error when refreshing the page. Is there anything obvious that I do wrong? Thanks very much for your help !

Evan R.

03/09/2020, 4:20 AM

Hey all! How is everyone else generating API docs for their ktor servers? Are you writing by hand? Is this a good choice?: https://github.com/nielsfalk/ktor-swagger Is there another tool you prefer?

Henrik

03/09/2020, 10:23 AM

Are there any news on when ktor 1.3.2 will be released?

👀 3

gotoOla

03/09/2020, 2:46 PM

Hi! Has anyone here done any implementation of OpenTracing using ktor? Most Java Implementations are using MDC/thread locals but with coroutines I would suspect you need another approach?

bitkid

03/09/2020, 3:06 PM

Hi! I have a question regarding oauth2. I have one endpoint which uses ktors oauth feature and i got it working with the microsoft open ID thing. i get back an auth token and a refresh token. How should i protect all my other endpoints when i already have valid tokens? just with the JWT auth feature where i always pass the obtained auth token? it seems like i can't pass the token (as Bearer) to the auth endpoint, it always tries to redirect me to the auth provider.

tim

03/10/2020, 10:14 AM

Hi I'm trying to ensure that every request has a cookie before the request gets to my routes (and initialise a new one if one doesn't exist already). I'm coming from NodeJS/Express so I'm looking the the middleware equivalent. Do I need to write a custom feature for this or is there an easier way to intercept the request and add the cookie if its not there already? In addition to this I'd like to have a authOnly high order function to deny access to certain routes ... i suppose i could do something like

get("/path") = authOnly { ... }

? but figured there's a common approach to solving these?

Vadim Briliantov

03/10/2020, 6:53 PM

❓❓❓❓ Hi, I am now researching the situation with Swagger support in Ktor. If anyone is using Swagger please tell me which problems are you facing? I also found this project: https://github.com/nielsfalk/ktor-swagger?files=1 and some other community-driven implementation. If anyone tried them please tell your experience. Any response would be appreciated ❓❓❓

hmole

03/11/2020, 1:47 PM

Can someone explain why this simple

Location

stops workingif I add an optional "packaging" parameter which is supposed to come from query? Uncommenting packaging property makes this location 404, works otherwise. Is there another hidded knowledge when attempting to work with locations besides incorrect imports? Ktor version is 1.1.2

@Location(path = "{artifact}/{version}")
  data class Request(
    val artifact: String,
    val version: String/*,
    val packaging: String*/
  )

  fun Application.init() {
    routing {
      route("myRoute") {
        get <Request> { request -> call.respond("") }
        head<Request> { request -> call.respond("") }
      }
    }
  }

spierce7

03/11/2020, 7:09 PM

Are we going to see a release for ktor against Kotlin 1.3.70? All the prereqs seem to be there now.

Jamy

03/12/2020, 4:59 AM

Hi, I need to authorize ios and android application to request my API but globally I don’t know what I need to do. Is one JWT enough? I would likes to make same system as facebook or Spotify. A simple token in my app but I need a secure solution and I don’t know if JWT is enough. Do you have any ideas or advice for me? I must confess that Google answers me that OAuth has nothing to do with what I’m looking for.

03/12/2020, 11:21 AM

📣 ktor

1.3.2

(with Kotlin 1.3.70 and serialization 0.20.0 has been released • Introduced iOS streaming response support • Provided challenge handler in iOS client configuration • Improved JsonFeature configuration DSL (#1472) • Simplified server kotlinx.serialization config • Recovered

HttpRequestBuilder.takeFrom

function (#1626) • Allowed to configure default cookies asynchronously • Exposed server

LocationInfo

and added location resolve functions (#1657) • Introduced function for async writing to server response channel (#1703) • Added an option to filter logged calls for ktor-client-logging • Fixed iOS client timeouts • Fixed iOS crash • Fixed 100% CPU Apache Ktor Http Client #1018 (#1689) • Fixed missing client response logging • Fixed CIO server local address detection (#1663) • Fix server request origin to provide header's host and port when available • Fixed random missing feature errors caused by concurrency at startup (#1694) • Fixed

Set-Cookie

header parser in iOS and JS • Fixed client multiple redirects with relative path (#1704) • Fixed unwrapping cancellation exceptions in client (#1482) • Fixed missed preconfigured

OkHttpClient

OkHttpEngine

(#1646) • Fixed websocket to complete closeReason on disconnection (#1275). • Fixed websocket sending CloseReason(1009) when frame is too big • Fixed websocket pinger logging • Fixed maxFrameSize for chunked frames • Fixed URL scheme parser (#1614) • Fixed platform detection in

PlatformUtils.IS_NODE

and

PlatformUtils.IS_BROWSER

(#1675) • Fixed

Short.highByte

• Fixed consumeEachBufferRange (#1693) • Fixed httpclient gzip decoding failure (#1189) • Fixed

InputStream

wrapper for

Input

• Bumped versions: • Kotlin 1.3.70 • kotlinx.coroutines 1.3.4 • kotlinx.serialization 0.20.0 • kotlinx.html 0.7.1 • dropwizard 4.1.2 • slf4j 1.7.30 • mustache 0.9.6 • pebble 3.1.2 • webjars 0.43 • jackson 2.10.2 Known issues: • Reverted fix for ios memory leak to prevent crashes ❗ No maven central publication due to an unknown verification error

👍 1

🔥 1

🎉 37

gotoOla

03/12/2020, 1:43 PM

does anyone know about a kafka client written in kotlin that could be used with ktor or should one just roll with the java-client?

gabin

03/12/2020, 2:33 PM

Hi guys, I’m getting this exception from time to time . can you point what does it mean - “Bad position (limit 50): 51” ? I’m sure that response is not empty ktor 1.3.2 , ktor-client-android

03-12 16:17:18.737 4006-4006/com.testapp.android D/NFApi: In validate response method. status: 404 Not Found
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err: java.lang.IllegalArgumentException: Bad position (limit 50): 51
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at java.nio.Buffer.positionImpl(Buffer.java:357)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at java.nio.Buffer.position(Buffer.java:351)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.charsets.UTFKt.decodeUTF8Line_array(UTF.kt:661)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.charsets.UTFKt.decodeUTF8Line(UTF.kt:36)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel$readUTF8LineToUtf8Suspend$2.invokeSuspend(ByteBufferChannel.kt:2120)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel$readUTF8LineToUtf8Suspend$2.invoke(ByteBufferChannel.kt)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.lookAheadSuspend$suspendImpl(ByteBufferChannel.kt:1877)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.lookAheadSuspend(ByteBufferChannel.kt)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.readUTF8LineToUtf8Suspend(ByteBufferChannel.kt:2116)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.readUTF8LineToAscii(ByteBufferChannel.kt:2056)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.readUTF8LineTo$suspendImpl(ByteBufferChannel.kt:2144)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.readUTF8LineTo(ByteBufferChannel.kt)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.readUTF8Line$suspendImpl(ByteBufferChannel.kt:2148)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteBufferChannel.readUTF8Line(ByteBufferChannel.kt)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at <http://io.ktor.utils.io|io.ktor.utils.io>.ByteReadChannelKt.readUTF8Line(ByteReadChannel.kt:223)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at com.testapp.lib.network.NFApi$client$2$1$4$1.invokeSuspend(NFApi.kt:57)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at com.testapp.lib.network.NFApi$client$2$1$4$1.invoke(NFApi.kt)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.client.features.HttpCallValidator.validateResponse(HttpCallValidator.kt:37)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.client.features.HttpCallValidator$Companion$install$2.invokeSuspend(HttpCallValidator.kt:99)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.client.features.HttpCallValidator$Companion$install$2.invoke(HttpCallValidator.kt)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.util.pipeline.SuspendFunctionGun.loop(PipelineContext.kt:318)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.util.pipeline.SuspendFunctionGun.proceed(PipelineContext.kt:163)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.util.pipeline.SuspendFunctionGun.execute(PipelineContext.kt:183)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:27)
03-12 16:17:18.757 4006-4006/com.testapp.android W/System.err:     at io.ktor.client.call.HttpClientCall.receive(HttpClientCall.kt:75)

Rui

03/12/2020, 2:52 PM

Hi guys, what is the best way to store global objects and data through out the application? I'm thinking about creating a singleton class object in main function or Application.module(), but not sure if it's a good practice. Is there any solid example on that?

rahulrav

03/12/2020, 3:43 PM

Is there a way to request

ktor

dispatch requests using a

CoroutineContext

Czar

03/13/2020, 2:08 AM

when this is executed, response contains redirect 302 and the code throws UnhandledRedirectionException. if I do the same request with httpie, I get status 200 and correct response. Am I doing something wrong with ktor client?

ktor.client.kts

gabin

03/13/2020, 9:55 AM

Hello guys, is there any access to logging feature from the outside? I’d like to log some custom events using existing possibilities. (ktor-client-android, org.slf4j:slf4j-android)

Marc Knaup

03/13/2020, 10:47 AM

It would be nice if Ktor could provide a

DslMarker

so that we can mix `Application`/`ApplicationCall`/`Route`/`PipelineInterceptor` etc. receivers with our own server setup DSL 🙂

Marc Knaup

03/13/2020, 10:50 AM

It would be even more awesome if all those classes would be interfaces, so that you can create a new interface that implements them by delegation. That would allow bringing many extensions in scope!

gabin

03/13/2020, 11:37 AM

the logging feature doesn’t log request body, only response body . Is it intended?

dambakk

03/13/2020, 5:32 PM

Hi! I try to make a request with a body of id’s. So I have a serializable data class IdWrapper(val id: String) and set the body of the request to a list of IdWrapper instances. I though that should be it, but I get an exception saying “IdWrapper cannot be cast to String” when setting the `HttpRequestBuilder`’s body. Why is it expecting a String? Shouldn’t it accept

Any

serializable object?

Marc Knaup

03/14/2020, 10:57 AM

How do I add attributes for the lifecycle of a call within a route? E.g. 1. route enter -> call.attributes.put(…) 2. all route logic 3. route exit -> call.attributes.remove(…) Currently I’m trying the following, but it exits before the route is “run”:

intercept(ApplicationCallPipeline.Setup) {
   // add attribute
   proceed()
   // remove attribute
}

Czar

03/14/2020, 2:58 PM

is there a way to make ktor log request bodies?

waltermcq

03/15/2020, 1:14 AM

@Nir Golan I'm doing the same course 😉 originally I found that calling the API with that request broke it; I never figured out exactly why but I believe the error is because moshi is looking for a

character but is getting a

as a result of the call body

Gunslingor

03/15/2020, 2:57 AM

how do I appropriately send these files as part of the page when this page is taken?

foxx1337

03/15/2020, 3:03 PM

Is it possible to configure ktor to automatically insert a trailing slash for requests on

static

directories? I got

static("ui") {
            resources("swagger-ui")
            resource("api.json")
            defaultResource("swagger-ui/index.html")
        }

and when I browse the server at

server/path/to/ui

I actually see that

index.html

file (direct 200, no reidrects) but I see none of the static resources the

index.html

tries to load (it addresses them like

./resource

). Those static resources load just fine if I navigate to

server/path/to/ui/

(notice the trailing slash).

Gunslingor

03/15/2020, 5:23 PM

Doesn't seem like many people are active on here, questioning whether I should be using ktor instead of spring boot on this project now 😃 lol. Why doesn't the Ktor IntelliJ plug in give an option for KotlinJS... I have three.js being served up but now I need figure out the best way to use it in ktor... simple thing took me all night, I miss the old days! lol... well I suspect it will pay off in the long run. I think I undertand I need a HttpClient(Js) but I can't seem to get that library to load using the gradle line on the site.

Gunslingor

03/15/2020, 6:48 PM

Now I'm confused, it looks like it isn't implemented yet? https://github.com/ktorio/ktor/blob/master/ktor-client/ktor-client-js/js/src/Js.kt

Rodrigo Silva

03/15/2020, 8:04 PM

I want to create a SPA using kotlinjs, what is the best way? With gradle -> koltinjs or ktor -> client side -> kotlinjs?

napperley

03/16/2020, 3:50 AM

Is it possible to exclude a HTTP response from being serialised? The code below triggers a InvalidMutabilityException:

@UnstableDefault
private suspend fun runGenericPromQlQuery(host: String, port: Int, query: String): String =
    <http://httpClient.post|httpClient.post>("http://$host:$port") {
        contentType(ContentType.parse(FORM_URL_ENCODED))
        body = listOf("query" to query).formUrlEncode()
    }

Title

napperley

03/16/2020, 3:50 AM

Is it possible to exclude a HTTP response from being serialised? The code below triggers a InvalidMutabilityException:

@UnstableDefault
private suspend fun runGenericPromQlQuery(host: String, port: Int, query: String): String =
    <http://httpClient.post|httpClient.post>("http://$host:$port") {
        contentType(ContentType.parse(FORM_URL_ENCODED))
        body = listOf("query" to query).formUrlEncode()
    }

Below is the stack trace:

Uncaught Kotlin exception: kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlin.collections.HashMap@c15f78
        at kfun:kotlin.Throwable.<init>(kotlin.String?)kotlin.Throwable (0x2f7117)
        at kfun:kotlin.Exception.<init>(kotlin.String?)kotlin.Exception (0x2f0a25)
        at kfun:kotlin.RuntimeException.<init>(kotlin.String?)kotlin.RuntimeException (0x2f05e5)
        at kfun:kotlin.native.concurrent.InvalidMutabilityException.<init>(kotlin.String)kotlin.native.concurrent.InvalidMutabilityException (0x31e765)
        at ThrowInvalidMutabilityException (0x31fe53)
        at MutationCheck (0x63f80e)
        at kfun:kotlin.collections.HashMap.<set-length>#internal (0x301ccd)
        at kfun:kotlin.collections.HashMap.addKey$stdlib(K)<http://kotlin.Int|kotlin.Int> (0x3062fb)
        at kfun:kotlin.collections.HashMap.put(K;V)V? (0x302cd9)
        at kfun:io.ktor.util.AttributesNative.put#internal (0x4dfc5f)
        at kfun:io.ktor.client.features.$addDefaultResponseValidation$lambda-1$lambda-0COROUTINE$18.invokeSuspend#internal (0x53a41c)
        at kfun:io.ktor.client.features.$addDefaultResponseValidation$lambda-1$lambda-0COROUTINE$18.invoke#internal (0x53aad2)
        at kfun:io.ktor.client.features.HttpCallValidator.$validateResponseCOROUTINE$24.invokeSuspend#internal (0x54326c)
        at kfun:io.ktor.client.features.HttpCallValidator.validateResponse#internal (0x543586)
        at kfun:io.ktor.client.features.HttpCallValidator.Companion.$install$lambda-1COROUTINE$23.invokeSuspend#internal (0x5461b0)
        at kfun:io.ktor.client.features.HttpCallValidator.Companion.$install$lambda-1COROUTINE$23.invoke#internal (0x546b0f)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal (0x4dc1dd)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.proceed#internal (0x4db85e)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.execute#internal (0x4dbc61)
        at kfun:io.ktor.util.pipeline.Pipeline.execute(TContext;TSubject)TSubject (0x4d6a30)
        at kfun:io.ktor.client.call.HttpClientCall.$receiveCOROUTINE$13.invokeSuspend(kotlin.Result<kotlin.Any?>)kotlin.Any? (0x52d097)
        at kfun:io.ktor.client.call.HttpClientCall.receive(io.ktor.client.call.TypeInfo)kotlin.Any (0x52d706)
        at kfun:com.chapman.batteryMetricsExtractor.$runGenericPromQlQueryCOROUTINE$0.invokeSuspend#internal (0x5f2dc5)
        at kfun:kotlin.coroutines.native.internal.BaseContinuationImpl.resumeWith(kotlin.Result<kotlin.Any?>) (0x3125a8)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith#internal (0x4dc8a8)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal (0x4dc413)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.object-1.resumeWith#internal (0x4de42c)
        at kfun:kotlin.coroutines.native.internal.BaseContinuationImpl.resumeWith(kotlin.Result<kotlin.Any?>) (0x312889)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith#internal (0x4dc8a8)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal (0x4dc413)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.object-1.resumeWith#internal (0x4de42c)
        at kfun:kotlin.coroutines.native.internal.BaseContinuationImpl.resumeWith(kotlin.Result<kotlin.Any?>) (0x312889)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith#internal (0x4dc8a8)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal (0x4dc413)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.object-1.resumeWith#internal (0x4de42c)
        at kfun:kotlin.coroutines.native.internal.BaseContinuationImpl.resumeWith(kotlin.Result<kotlin.Any?>) (0x312889)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith#internal (0x4dc8a8)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal (0x4dc413)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.object-1.resumeWith#internal (0x4de42c)
        at kfun:kotlin.coroutines.native.internal.BaseContinuationImpl.resumeWith(kotlin.Result<kotlin.Any?>) (0x312889)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.resumeRootWith#internal (0x4dc8a8)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal (0x4dc413)
        at kfun:io.ktor.util.pipeline.SuspendFunctionGun.object-1.resumeWith#internal (0x4de42c)
        at kfun:kotlin.coroutines.native.internal.BaseContinuationImpl.resumeWith(kotlin.Result<kotlin.Any?>) (0x312889)
        at kfun:kotlinx.coroutines.DispatchedTask.run() (0x3f9aca)
        at kfun:kotlinx.coroutines.EventLoopImplBase.processNextEvent()kotlin.Long (0x3d5480)
        at kfun:kotlinx.coroutines.BlockingCoroutine.joinBlocking#internal (0x406afe)
        at kfun:kotlinx.coroutines.runBlocking(kotlin.coroutines.CoroutineContext;kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,T>){0<kotlin.Any?>}Generic (0x405be8)
        at kfun:kotlinx.coroutines.runBlocking$default(kotlin.coroutines.CoroutineContext?;kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,T>;<http://kotlin.Int|kotlin.Int>){0<kotlin.Any?>}Generic (0x406121)
        at kfun:com.chapman.batteryMetricsExtractor.main(kotlin.Array<kotlin.String>) (0x5f0848)
        at Konan_start (0x5f771b)
        at Init_and_run_start (0x61c08b)
        at __libc_start_main (0x7f291a21bb97)
        at  (0x2ac029)
        at  ((nil))

e5l

03/16/2020, 2:47 PM

Hi @napperley, what do you mean by

being serialized

here? We should encode list somehow

napperley

03/16/2020, 8:35 PM

I want to make it that the body from the HTTP response isn't being handled by the KotlinX Serialization library, and is just a String being returned (not converted to a custom data type).

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