func (p *Proxy) ErrorHandle(w http.ResponseWriter, statusCode int) { status := fmt.Sprintf("%d %s", statusCode, http.StatusText(statusCode)) p.Ctx.Response = &http.Response{ Status: status, StatusCode: statusCode, } w.Header().Set("Content-Type", "text/plain; charset=utf-8") w.Header().Set("X-Content-Type-Options", "nosniff") w.WriteHeader(statusCode) fmt.Fprintln(w, status) }.