akka-http non-standard status codes

[Patrick O'Reilly]

Hi,

We're using Akka HTTP client to consume a remote API. This API however is returning non-standard status codes in the 600's which cannot be parsed by Akka. akka.http.ParserSettings.withCustomStatusCodes only allow valid 100-599 codes. Does anyone have a solution to this problem? The exception thrown is an illegal response status but the exception has no details on the actual status code.

Thanks,

Patrick

[Konrad Malawski]

Everything is configurable :-)

I see we missed to document that setting. We documented how to do it for custom media types here: http://doc.akka.io/docs/akka-http/current/scala/http/routing-dsl/directives/method-directives/extractMethod.html#custom-http-method

Which is basically the same process you'll need to do for the status code:

val parserSettings = ParserSettings(system).withCustomStatusCodes(StatusCodes.custom(666, "BadStatusCode", "The number of the beast", false, false))

val serverSettings = ServerSettings(system).withParserSettings(parserSettings)

val binding = Http().bindAndHandle(routes, host, port, settings = serverSettings)

I'll add that to the docs.

Happy hakking

-- 
Konrad `ktoso` Malawski
Akka @ Lightbend

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[Patrick O'Reilly]

Hi Konrad,

Thanks for the prompt reply. I've tried the StatusCodes.custom call with a non-standard status code but it throws the following exception:

Exception in thread "main" java.lang.IllegalArgumentException: Can't register status code in non-standard region

at akka.http.scaladsl.model.StatusCodes$.custom(StatusCode.scala:92)

at AkkaHttp2$.delayedEndpoint$AkkaHttp2$1(AkkaHttp2.scala:47)

at AkkaHttp2$delayedInit$body.apply(AkkaHttp2.scala:16)

at scala.Function0$class.apply$mcV$sp(Function0.scala:34)

at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)

at scala.App$$anonfun$main$1.apply(App.scala:76)

at scala.App$$anonfun$main$1.apply(App.scala:76)

at scala.collection.immutable.List.foreach(List.scala:381)

at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)

at scala.App$class.main(App.scala:76)

at AkkaHttp2$.main(AkkaHttp2.scala:16)

at AkkaHttp2.main(AkkaHttp2.scala)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

It seems StatusCodes.custom specifically doesn't allow codes outside the normal range:

def custom(intValue: Int, reason: String, defaultMessage: String = ""): StatusCode =

    if (100 to 199 contains intValue) Informational(intValue)(reason, defaultMessage)

    else if (200 to 299 contains intValue) Success(intValue)(reason, defaultMessage)

    else if (300 to 399 contains intValue) Redirection(intValue)(reason, defaultMessage, defaultMessage)

    else if (400 to 499 contains intValue) ClientError(intValue)(reason, defaultMessage)

    else if (500 to 599 contains intValue) ServerError(intValue)(reason, defaultMessage)

    else throw new IllegalArgumentException("Can't register status code in non-standard region")

Best,

Patrick

[Konrad Malawski]

Please read my response in detail: 

Use the 4 parameter version: StatusCodes.custom(666, "BadStatusCode", "The number of the beast", false, false)

Since it's not a standard range you must provide the additional information since we can't guess it.

-- 
Konrad `ktoso` Malawski
Akka @ Lightbend

[Konrad Malawski]

5* parameter :)

-- 
Konrad `ktoso` Malawski
Akka @ Lightbend

[Viktor Klang]

How about having that exception message suggest using the other factory method?

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[Konrad Malawski]

Sure, why not.

-- 
Konrad `ktoso` Malawski
Akka @ Lightbend

[Patrick O'Reilly]

Aha. Did not realize there was a separate method. Thanks a lot for your help!

Best,

Patrick

[Konrad Malawski]

Ticket: https://github.com/akka/akka-http/issues/713 

PR with docs and improved exception: https://github.com/akka/akka-http/pull/714/

Happy hakking!

-- 
Konrad `ktoso` Malawski
Akka @ Lightbend