gzip golang http responses

gzip_http_response.go

//https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding

func writeOptimizedHttpResponse(w http.ResponseWriter, r *http.Request, b []byte, contentType string) {
	w.Header().Set("Content-Type", contentType)

	encodings := r.Header.Get("Accept-Encoding")

	switch {
	case strings.Contains(encodings, "gzip"):
		w.Header().Set("Content-Encoding", "gzip")
		//w.Header().Del("Content-Length")
		zipper := gzip.NewWriter(w)
		defer zipper.Close()
		zipper.Write(b)
	//case compress:
	//case deflate:
	//case br:
	default:
		//identity
		fmt.Fprint(w, b)
	}
}