simple akka-http work fine in REPL but not in script mode

[dacr]

example code

import $ivy.`com.typesafe.akka::akka-http:10.1.1`
import $ivy.`com.typesafe.akka::akka-stream:2.5.12`
import akka.http.scaladsl._
import akka.http.scaladsl.server.Directives._

implicit val system = akka.actor.ActorSystem("MySystem")
implicit val materializer = akka.stream.ActorMaterializer()
implicit val executionContext = system.dispatcher

val route1 = pathPrefix("") { getFromDirectory("example") }
val bindingFuture = Http().bindAndHandle(route1, "0.0.0.0", 8080)
def shutdown = bindingFuture.flatMap(_.unbind()).onComplete{_ => system.terminate() }
/*
 Remember that everything is done asynchronously, so don't exit...
 Following lines allow to wait for the actor system to be terminated
 */
import scala.concurrent.Await
import scala.concurrent.duration.Duration
Await.result(system.whenTerminated, Duration.Inf)

• just create an example directory with a dummy index.html file in it
• starts amm, copy and paste in ammonite REPL, everything works fine
  • curl http://localhost:8080/index.html
• launch it using amm example.sc the http server doesn't work anymore (timeout...)

20:32 $ amm example.sc 
Compiling (synthetic)/ammonite/predef/interpBridge.sc
Compiling (synthetic)/ammonite/predef/DefaultPredef.sc
Compiling /home/dcr/dev-new/oneline-httpd/httpd/example.sc
[INFO] [05/07/2018 20:34:16.479] [MySystem-akka.actor.default-dispatcher-8] [akka.actor.ActorSystemImpl(MySystem)] Request timeout encountered for request [GET / Empty]

[mycaule]

Running your example here is what I get:

$ http :8080/example/
HTTP/1.1 404 Not Found
Content-Length: 42
Content-Type: text/plain; charset=UTF-8
Date: Sun, 16 Sep 2018 08:40:15 GMT
Server: akka-http/10.1.5

The requested resource could not be found.

Akka HTTP runs fine but return 404 code. It looks like there is a problem on path. The following route works fine :

import akka.http.scaladsl.model.{HttpEntity, ContentTypes}
val route =
  path("hello") {
    get {
      complete(HttpEntity(ContentTypes.`text/html(UTF-8)`, "<h1>Say hello to akka-http</h1>"))
    }
  }

$ http :8080/hello
HTTP/1.1 200 OK
Content-Length: 31
Content-Type: text/html; charset=UTF-8
Date: Sun, 16 Sep 2018 08:42:22 GMT
Server: akka-http/10.1.5

<h1>Say hello to akka-http</h1>

[mycaule]

No bug in Ammonite 0.7 Same bug as @dacr in Ammonite 1.2

[dacr]

I got the same issue with doodle, see : https://github.com/creativescala/doodle/issues/78

There is a simple a workaround, put your code into an object, and make some interaction with this object in order "activate" it.

Then everything will work fine with akka-http, doodle and probably some other libraries...

For example this akka-http static file web servers will work perfectly in REPL or script mode :

import $ivy.`com.typesafe.akka::akka-http:10.1.7`
import $ivy.`com.typesafe.akka::akka-stream:2.5.21`

import akka.http.scaladsl._
import akka.http.scaladsl.server.Directives._
import scala.concurrent.Await
import scala.concurrent.duration.Duration

object StaticServer {
  implicit val system = akka.actor.ActorSystem("MySystem")
  implicit val materializer = akka.stream.ActorMaterializer()
  implicit val executionContext = system.dispatcher

  val routes = pathPrefix("browse") { getFromBrowseableDirectory(".") }
  Http().bindAndHandle(routes, "0.0.0.0", 8080).andThen{case _ => println("Ready.")}
}
Await.ready(StaticServer.system.whenTerminated, Duration.Inf)

@lihaoyi what do you think about this ? May be this is something to add in your documentation ? Or do you think it can be fixed ?

[mprihoda]

I can confirm the same behaviour even with Ammonite 1.8.1 - ending script with Await.result to wait for a future to resolve ends with timeout exception every time, doing the same in REPL works well.

The trick with the object still works, thanks for sharing.