code: func StreamResponse(w http.ResponseWriter, data io.ReadCloser) {
  	w.Header().Set("Content-Type", DefaultContentTypeV1_1)
  	if _, err := copyBuf(w, data); err != nil {
  		fmt.Printf("ERROR in stream: %v\n", err)
  	}
  	data.Close()
  }
docs: // StreamResponse streams a response object to the client