Discard HTTP Entity with conditional directive

Akka Libraries Akka HTTP
5

@jrudolph

Our service is doing something like this:

      pathPrefix("getValue") {
        val response = Http().singleRequest(HttpRequest(uri = "https://google.com"))
        onSuccess(response) { response =>
          conditional(response.header[ETag].map(_.etag), lastModified = None) {
            complete {
              response
            }
          }
        }
      }

We need to send the request to the downstream service to figure out the etag - and on success path the downstream response is a significant portion of our service response.