Golang:如何读取ReverseProxy的响应主体?

本文介绍了Golang:如何读取ReverseProxy的响应主体?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 package main import ( "net/http" "net/http/httputil" "net/url" ) func main() { target := &url.URL{Scheme: "http", Host: "www.google"} proxy := httputil.NewSingleHostReverseProxy(target) http.Handle("/google", proxy) http.ListenAndServe(":8099", nil) }

反向代理有效.如何获得响应正文?

Reverse Proxy is works. How can I get the response body?

推荐答案

httputil.ReverseProxy 具有一个 Transport 字段.您可以使用它来修改响应.例如:

httputil.ReverseProxy has a Transport field. You can use it to modify the response. For example:

type transport struct { http.RoundTripper } func (t *transport) RoundTrip(req *http.Request) (resp *http.Response, err error) { resp, err = t.RoundTripper.RoundTrip(req) if err != nil { return nil, err } b, err := ioutil.ReadAll(resp.Body) if err != nil { return nil, err } err = resp.Body.Close() if err != nil { return nil, err } b = bytes.Replace(b, []byte("server"), []byte("schmerver"), -1) body := ioutil.NopCloser(bytes.NewReader(b)) resp.Body = body resp.ContentLength = int64(len(b)) resp.Header.Set("Content-Length", strconv.Itoa(len(b))) return resp, nil } // ... proxy := httputil.NewSingleHostReverseProxy(target) proxy.Transport = &transport{http.DefaultTransport}

整个场景的操场示例: play.golang/p/b0S5CbCMrI.

Playground example of the whole thing: play.golang/p/b0S5CbCMrI.