extractDataBytes

Signature

def extractDataBytes: Directive1[Source[ByteString, Any]]

Description

Extracts the entities data bytes as Source<ByteString, ?>Source[ByteString, _] from the RequestContextRequestContext.

The directive returns a stream containing the request data bytes.

Example

Scala
val route =
  extractDataBytes { data ⇒
    val sum = data.runFold(0) { (acc, i) ⇒ acc + i.utf8String.toInt }
    onSuccess(sum) { s ⇒
      complete(HttpResponse(entity = HttpEntity(s.toString)))
    }
  }

// tests:
val dataBytes = Source.fromIterator(() ⇒ Iterator.range(1, 10).map(x ⇒ ByteString(x.toString)))
Post("/abc", HttpEntity(ContentTypes.`text/plain(UTF-8)`, data = dataBytes)) ~> route ~> check {
  responseAs[String] shouldEqual "45"
}
Java
import static akka.http.javadsl.server.Directives.extractDataBytes;

final Route route = extractDataBytes(data -> {
  final CompletionStage<Integer> sum = data.runFold(0, (acc, i) ->
    acc + Integer.valueOf(i.utf8String()), materializer());
  return onSuccess(sum, s ->
    complete(HttpResponse.create().withEntity(HttpEntities.create(s.toString()))));
});

// tests:
final Iterator iterator = Arrays.asList(
  ByteString.fromString("1"),
  ByteString.fromString("2"),
  ByteString.fromString("3")).iterator();
final Source<ByteString, NotUsed> dataBytes = Source.fromIterator(() -> iterator);

testRoute(route).run(
  HttpRequest.POST("abc")
    .withEntity(HttpEntities.create(ContentTypes.TEXT_PLAIN_UTF8, dataBytes))
).assertEntity("6");
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