gzip

var GZIP = func(handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if strings.Contains(r.URL.Path, "metrics") {
			handler.ServeHTTP(w, r)
			return
		}

		for _, header := range r.Header["Upgrade"] {
			if header == "websocket" {

				handler.ServeHTTP(w, r)
				return
			}
		}
		if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
			gwriter := NewWrappedResponseWriter(w)
			defer gwriter.Flush()
			gwriter.Header().Set("Content-Encoding", "gzip")
			handler.ServeHTTP(gwriter, r)
			return
		}
		handler.ServeHTTP(w, r)
	})
}