simplifications of http-client

httpclient.scala

trait HttpClient {
  implicit def system: ActorSystem

  implicit def materializer: ActorMaterializer

  def connectionContext: HttpsConnectionContext

  protected val http = Http()

  //execs only if result was successful
  def exec[T, U](r: HttpRequest, f: U => T)(implicit u: Unmarshaller[HttpResponse, U], ec: ExecutionContext): Future[T] =
    http.singleRequest(r).flatMap(u.apply(_).map(f))

  //execs only if result was successful
  def execOK[T, U](r: HttpRequest, f: U => T)(implicit u: Unmarshaller[HttpResponse, U], ec: ExecutionContext): Future[T] =
    http.singleRequest(r).flatMap { rsp =>
      if (rsp.status.isSuccess()) u.apply(rsp).map(f)
      else Unmarshal(rsp.entity).to[String].flatMap(str => Future.failed[T](SgHttpError(rsp.status.intValue(), str)))
    }
}