akka HttpResponse read body as String scala

Question

So I have a function with this signature (akka.http.model.HttpResponse):

def apply(query: Seq[(String, String)], accept: String): HttpResponse

Answer 1

Unfortunately in my case, Unmarshal to String didn't work properly complaining on: Unsupported Content-Type, supported: application/json. That would be more elegant solution, but I had to use another way. In my test I used Future extracted from entity of the response and Await (from scala.concurrent) to get the result from the Future:

Put("/post/item", requestEntity) ~> route ~> check {
  val responseContent: Future[Option[String]] =
  response.entity.dataBytes.map(_.utf8String).runWith(Sink.lastOption)

  val content: Option[String] = Await.result(responseContent, 10.seconds)
  content.get should be(errorMessage)
  response.status should be(StatusCodes.InternalServerError)
}

If you need to go through all lines in a response, you can use runForeach of Source:

 response.entity.dataBytes.map(_.utf8String).runForeach(data => println(data))