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  • 16:15
    vmandrychenko commented #1610
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Harsh
@frog_splash_twitter

Hi All, I am new to sttp and trying to learn few basics of it.
In one of the issues I am facing I have not been getting right json response for this code

val baseRequest: RequestT[Empty, Either[String, String], Nothing] = basicRequest.header("accept", "application/vnd.github.v3+json")
    val url: Uri = uri"https://api.github.com/events"

    sttpBackend
      .send {
        baseRequest
          .readTimeout(config.http.timeout)
          .get(url)
          .response(asJson[Either[GitErrorResponse, List[CommitEvent]]])
      }
      .map[Either[Error, List[CommitEvent]]] {
        response: Response[Either[ResponseError[CirceError], Either[GitErrorResponse, List[CommitEvent]]]] =>
          response.translate
      }
      .handleError { throwable: Throwable =>
        throwable.translate
      }

compare that to this basic scala code its working as expected

val url = "https://api.github.com/events"
  val result = scala.io.Source.fromURL(url).mkString
  println(result)

Can someone help ?

1 reply
barthorre
@barthorre
Hi everyone, anyway here has some experience with opening a websocket connection with a custom protocol?
15 replies
kbakha
@kbakha
Hi there. Is there any configuration for connection pools for okhttp backend?
2 replies
Łukasz Drygała
@ldrygala
Hi everyone, is there any way to convert org.scalajs.dom.File into sttp.client.dom.experimental.File. I wanted to send a file selected from UI.
11 replies
Glen Marchesani
@fizzy33
@adamw is there a place that talks about the differences between v2 and v3 aka the what's new ? thanks
4 replies
Glen Marchesani
@fizzy33
also thank you, thank you, thank you for having a new package name for v3 (other projects that didn't do that have caused my organization a fair bit of chaos) so it is appreciated.
Glen Marchesani
@fizzy33
Has anyone gotten sttp working with sse / server sent events ? I plan to use the streaming support to do it
3 replies
This message was deleted
Mark Hammons
@markehammons
Is there ever a situation where sttp will attempt to reread a stream body?
19 replies
vonchav
@voonchav_gitlab
Hi @adamw, I'm getting around to finally try out sttp3 and I'm having problem with migrating fromMetadata to the new signature. Can you provide an example for the new signature?
v2's signature is: def fromMetadata[T, S](f: ResponseMetadata => ResponseAs[T, S]): ResponseAs[T, S]
v3's is: def fromMetadata[T, R](default: ResponseAs[T, R], conditions: ConditionalResponseAs[T, R]*)
Thanks!
14 replies
Aleksandar Skrbic
@aleksandarskrbic
    val request = basicRequest
      .body(authPayload)
      .post(uri"${config.url}")
      .response(asJson[AccessToken])

    retry.Backoff(5, 1.second).apply(request.send())
4th line throws this error
java.lang.NoSuchMethodError: sttp.client.ResponseAs$.deserializeRightWithError(Lscala/Function1;)Lscala/Function1;
Does anyone know what could be a problem? I have implicit Decoder for AccessToken
I'm using AkkaHttpBackend
Michael
@grouzen
Hi.
@adamw why tapir 0.17.0-M2 brings sttp3 with package name sttp.client3 when sync-http-client-backend-cats 3.0.0-RC3 uses sttp3 with package name sttp.client? How should I compose them? ;)
Michael
@grouzen
In the end I have such an error:
inferred type arguments [mypackage.AppEffect,sttp.client.SttpBackend[mypackage.AppEffect,Any]] do not conform to method fromEffect's type parameter bounds [F[_],I <: sttp.client3.SttpBackend[mypackage.AppEffect,Any]]
2 replies
Aleksandar Skrbic
@aleksandarskrbic

java.lang.NoSuchMethodError: sttp.client.ResponseAs$.deserializeRightWithError(Lscala/Function1;)Lscala/Function1;

I've managed to solve this. I had different versions of sttp and sttp-akka-http backend so that was the problem :)

Glen Marchesani
@fizzy33
so I am getting EventSource (aka server sent events) working in scala js and scala jvm. We had a bunch of weird issues where the scala js code worked but not as expected (things like EventStream in chrome wasn't populated). That Chrome symptom says that you are not using a polyfill and not EventSource directly. We are like but we are using EventSource. The end of the story is it turns out we were using our scala jvm based server sent events parser with sttp's monix fetch backed in the brower and it just worked...
1 reply
nobody noticed this for a long long time
pool
@hamstakilla
Hello, im getting this weird compilation errors while moving from POM to SBT(sttp v. 1.7.2)
"No implicits found for parameter handler: SttpHandler[R_, Nothing]"
I have sync backend implicit in scope. Maybe i'm missing some compiler flag or something?
2 replies
Tobias Roeser
@lefou
Hello, can anybody tell me where the * in class AkkaHttpBackend extends SttpBackend[Future, Source[ByteString, Any], Flow[Message, Message, *]] comes from?
6 replies
IJ IDEA can't
Denis Mikhaylov
@notxcain
Hi! Does anyone know any sttp benchmarks with backend comparison? Or maybe someone compared Java 11 HttpClient with Netty?
Glen Marchesani
@fizzy33
is there something I need to do to cleanup resources on errors ? I have a sttp client request that is failing because the server isn't started after a little bit I get a java.io.IOException: Too many open files and at that point it never recovers
this is in an isolated use case so there is nothing else using up descriptors
the full stack trace is
17:58:15.191 | ERROR | scala-execution-context-global-14 | a8.hermes.ServerSentEventsFactory. | error with stream will restart @ Some(30)
java.lang.IllegalStateException: failed to create a child event loop
  at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
  at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
  at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
  at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
  at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:86)
  at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:81)
  at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:68)
  at org.asynchttpclient.netty.channel.NioTransportFactory.newEventLoopGroup(NioTransportFactory.java:32)
  at org.asynchttpclient.netty.channel.NioTransportFactory.newEventLoopGroup(NioTransportFactory.java:21)
  at org.asynchttpclient.netty.channel.ChannelManager.<init>(ChannelManager.java:133)
  at org.asynchttpclient.DefaultAsyncHttpClient.<init>(DefaultAsyncHttpClient.java:92)
  at sttp.client.asynchttpclient.AsyncHttpClientBackend$.defaultClient(AsyncHttpClientBackend.scala:380)
  at sttp.client.asynchttpclient.monix.AsyncHttpClientMonixBackend$.$anonfun$apply$1(AsyncHttpClientMonixBackend.scala:76)
  at monix.eval.internal.TaskRunLoop$.startLight(TaskRunLoop.scala:271)
  at monix.eval.Task.runAsyncOptF(Task.scala:812)
  at monix.eval.Task.runAsyncOpt(Task.scala:710)
  at monix.eval.Task.runAsync(Task.scala:660)
  at monix.reactive.internal.builders.TaskAsObservable.unsafeSubscribeFn(TaskAsObservable.scala:30)
  at monix.reactive.internal.operators.ConcatMapObservable.unsafeSubscribeFn(ConcatMapObservable.scala:76)
  at monix.reactive.internal.operators.OnErrorRecoverWithObservable.unsafeSubscribeFn(OnErrorRecoverWithObservable.scala:35)
  at monix.reactive.internal.operators.LiftByOperatorObservable.unsafeSubscribeFn(LiftByOperatorObservable.scala:30)
  at monix.reactive.observables.ChainedObservable$.$anonfun$subscribe$1(ChainedObservable.scala:74)
  at monix.execution.internal.Trampoline.monix$execution$internal$Trampoline$$immediateLoop(Trampoline.scala:66)
  at monix.execution.internal.Trampoline.startLoop(Trampoline.scala:32)
  at monix.execution.schedulers.TrampolineExecutionContext$JVMOptimalTrampoline.startLoop(TrampolineExecutionContext.scala:132)
  at monix.execution.internal.Trampoline.execute(Trampoline.scala:40)
  at monix.execution.schedulers.TrampolineExecutionContext.execute(TrampolineExecutionContext.scala:57)
  at monix.execution.schedulers.BatchingScheduler.execute(BatchingScheduler.scala:50)
  at monix.execution.schedulers.BatchingScheduler.execute$(BatchingScheduler.scala:47)
  at monix.execution.schedulers.AsyncScheduler.execute(AsyncScheduler.scala:31)
  at monix.execution.schedulers.ExecuteExtensions.executeTrampolined(ExecuteExtensions.scala:86)
  at monix.execution.schedulers.ExecuteExtensions.executeTrampolined$(ExecuteExtensions.scala:85)
  at monix.execution.Scheduler$Extensions.executeTrampolined(Scheduler.scala:305)
  at monix.reactive.observables.ChainedObservable$.subscribe(ChainedObservable.scala:69)
  at monix.reactive.internal.operators.ConcatObservable.unsafeSubscribeFn(ConcatObservable.scala:37)
  at monix.reactive.observables.ChainedObservable.unsafeSubscribeFn(ChainedObservable.scala:55)
  at monix.reactive.internal.operators.OnErrorRecoverWithObservable$$anon$1.$anonfun$onError$1(OnErrorRecoverWithObservable.scala:57)
  at monix.execution.Ack$$anon$1.run(Ack.scala:54)
  at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
  at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
  at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
  at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
  at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:172)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
  at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
  at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:142)
  at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:146)
  at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:37)
  at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
  ... 42 more
Caused by: java.io.IOException: Too many open files
  at sun.nio.ch.IOUtil.makePipe(Native Method)
  at sun.nio.ch.KQueueSelectorImpl.<init>(KQueueSelectorImpl.java:84)
  at sun.nio.ch.KQueueSelectorProvider.openSelector(KQueueSelectorProvider.java:42)
  at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:173)
  ... 46 more
any advice / direction is appreciated
Wojtek Pituła
@Krever
hey, Im runnign sttp 1.x alongside sttp 2.x, both with prometheus backend and the clash with Collector already registered that provides name: sttp_request_latency_count. I know I can override those names, but maybe there is some other way?
1 reply
Glen Marchesani
@fizzy33
So for my issue I added this (a memoize on the backend task which makes sense (I only need one backend AFAICT) --
val instance: Task[sttp.client.SttpBackend[Task, monix.reactive.Observable[java.nio.ByteBuffer], WebSocketHandler]] =
    AsyncHttpClientMonixBackend().memoize
1 reply
Glen Marchesani
@fizzy33
yeah that fixed it for me
Glen Marchesani
@fizzy33
anyone recommend code for taking a
    val webSocketT: Task[WebSocket[Task]] = ...
12 replies
and getting a
      lazy val frames: Observable[WebSocketFrame.Incoming] =
using monix
here is what I have

      lazy val frames: Observable[WebSocketFrame.Incoming] = {
        Observable.unsafeCreate[WebSocketFrame.Incoming] { subscriber =>

          val cancelable = AssignableCancelable.multi()

          def feedOnNext(): Unit = {
            val receiveT: Task[(Either[WebSocketEvent.Close, WebSocketFrame.Incoming], WebSocket[Task])] =
              webSocketT
                .flatMap { webSocket =>
                  webSocket
                    .receive
                    .map(_ -> webSocket)
                }
            cancelable :=
              receiveT
                .runAsync {
                  case Left(error) =>
                    subscriber.onError(error)
                  case Right((Left(close), _)) =>
                    if ( logger.isTraceEnabled )
                      logger.trace(s"received close ${close}")
                    subscriber.onComplete()
                  case Right((Right(frame), webSocket)) =>
                    subscriber
                      .onNext(frame)
                      .syncOnContinue(feedOnNext())
                      .syncOnStopOrFailure {
                        case Some(th) =>
                          logger.error(s"error processing ${frame}", th)
                          feedOnNext()
                        case None =>
                          if ( logger.isTraceEnabled)
                            logger.trace(s"stop received closing WebSocket")
                          webSocket.close.runAsyncAndForget
                      }
                }
          }

          feedOnNext()
          cancelable
        }
      }
Glen Marchesani
@fizzy33
any comments are appreciated
Glen Marchesani
@fizzy33
okay here is something that doesn't do "unsafe" things
      lazy val frames: Observable[WebSocketFrame.Incoming] = {
        val receiveT: Task[(Either[WebSocketEvent.Close, WebSocketFrame.Incoming], WebSocket[Task])] =
          webSocketT
            .flatMap { webSocket =>
              webSocket
                .receive
                .map(_ -> webSocket)
            }

        val receiveForObservableT: Task[(Either[WebSocketEvent.Close, WebSocketFrame.Incoming], Unit)] = receiveT.map(t => (t._1, ()))

        val observable: Observable[Either[WebSocketEvent.Close, WebSocketFrame.Incoming]] = Observable.fromAsyncStateAction[Unit,Either[WebSocketEvent.Close, WebSocketFrame.Incoming]](_ => receiveForObservableT)(())

        observable
          .takeWhile(_.isRight)
          .collect {
            case Right(f) =>
              f
          }
      }
6 replies
Mark Hammons
@markehammons
Hi, I'm having some weird behavior from sttp3 in some cases
when making a POST to 198.51.100.0 (which is supposed to be an invalid ipv4 address), I get a ReadException while I expected sttp to give me a ConnectException.
furthermore, sttp waits until the timeout has been reached to send a ReadException
Mark Hammons
@markehammons
I'm using the sttp3 monix async http backend by the way
5 replies
truongio
@truongio
Hi! I'm trying to integrate with an external API that only accepts form encoded request bodies (application/x-www-form-urlencoded). Do you have any recommendations on how to do this mapping from my case classes to such a body without having to manually create a Map[String, String] for each case class?
1 reply
Arun Gopalpuri
@arun0009
Is there an opentelemetry backend wrapper similar to opentracing wrapper? https://sttp.softwaremill.com/en/latest/backends/wrappers/opentracing.html
5 replies
ylaurent
@ylaurent

Hello, I am trying client3 with zio (scala 2.13.3 and zio 1.0.3, sttp 3.0.0-RC5), following the example here https://sttp.softwaremill.com/en/latest/examples.html (GET and parse JSON using the ZIO async-http-client backend and circe), I get at runtime

[info]   Fiber failed.
[info]   An unchecked error was produced.
[info]   java.lang.Error: Defect in zio.Has: Set(SttpBackend[=λ %2:0 → ZIO[-Any,+Throwable,+2:0],+{ZioStreams & package::WebSockets}]) statically known to be contained within the environment are missing
[info]       at zio.Has$HasSyntax$.prune$extension(Has.scala:197)
[info]       at zio.Has$HasSyntax$.union$extension(Has.scala:209)
[info]       at zio.Has$Union$$anon$2.union(Has.scala:91)
[info]       at zio.Has$Union$$anon$2.union(Has.scala:89)

Anything I am missing ? when I am not using layer, and just directly the backend its working properly.

9 replies
Denis Mikhaylov
@notxcain
2 replies
Lorenzo Gabriele
@lolgab
Hi everyone :)
Are you interested in a upickle/ujson integration like the circe one? Can I submit a PR?
4 replies