code: func (h *HTTPBin) Deflate(w http.ResponseWriter, r *http.Request) {
  	resp := &deflateResponse{
  		Headers:  getRequestHeaders(r),
  		Origin:   getOrigin(r),
  		Deflated: true,
  	}
  	body, _ := json.Marshal(resp)
  
  	buf := &bytes.Buffer{}
  	w2 := zlib.NewWriter(buf)
  	w2.Write(body)
  	w2.Close()
  
  	compressedBody := buf.Bytes()
  
  	w.Header().Set("Content-Encoding", "deflate")
  	writeJSON(w, compressedBody, http.StatusOK)
  }
docs: // Deflate returns a gzipped response