您需要将所需的值复制到新请求中。由于这与反向代理的工作非常相似，因此您可能需要查看“ net / http /
httputil”的作用
ReverseProxy。
创建一个新请求，然后仅将要发送的请求部分复制到下一台服务器。如果您打算在两个地方都使用它，则还需要读取和缓冲请求正文：
func handler(w http.ResponseWriter, req *http.Request) { // we need to buffer the body if we want to read it here and send it // in the request. body, err := ioutil.ReadAll(req.Body) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } // you can reassign the body if you need to parse it as multipart req.Body = ioutil.NopCloser(bytes.NewReader(body)) // create a new url from the raw RequestURI sent by the client url := fmt.Sprintf("%s://%s%s", proxyScheme, proxyHost, req.RequestURI) proxyReq, err := http.NewRequest(req.Method, url, bytes.NewReader(body)) // We may want to filter some headers, otherwise we could just use a shallow copy // proxyReq.Header = req.Header proxyReq.Header = make(http.Header) for h, val := range req.Header { proxyReq.Header[h] = val } resp, err := httpClient.Do(proxyReq) if err != nil { http.Error(w, err.Error(), http.StatusBadGateway) return } defer resp.Body.Close() // legacy pre}
