scala - Akka-HTTP: how to know if Content-type header was explicitly set in received response

Question

Is the a way in akka-http to know if 'Content-type' header was explicitly set in HttpResponse that we received? From sniffed Http dump I see, that there was no 'Content-Type' header, but

httpResponse.header[`Content-Type`].get.contentType.mediaType.toString() and httpResponse.entity.getContentType().mediaType.toString

stil return application/octet-stream.

question from:https://stackoverflow.com/questions/66063753/akka-http-how-to-know-if-content-type-header-was-explicitly-set-in-received-res

Answer 1

This is default Content type not only for Akka-HTTP, but perhaps for other frameworks like Play too. Akka-http and other HTTP based technologies need to know how to parse content internally, based on this header. application/octet-stream means that it considers request body as just byte-stream. Rule of thumb: if it is possible - try to specify Content-type.