Go Proxy about blog

[CharLemAznable]

Go语言内置的反向代理

func NewSingleHostReverseProxy(target *url.URL) *ReverseProxy {
	targetQuery := target.RawQuery
	director := func(req *http.Request) {
		req.URL.Scheme = target.Scheme
		req.URL.Host = target.Host
		req.URL.Path = singleJoiningSlash(target.Path, req.URL.Path)
		if targetQuery == "" || req.URL.RawQuery == "" {
			req.URL.RawQuery = targetQuery + req.URL.RawQuery
		} else {
			req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery
		}
		if _, ok := req.Header["User-Agent"]; !ok {
			// explicitly disable User-Agent so it's not set to default value
			req.Header.Set("User-Agent", "")
		}
	}
	return &ReverseProxy{Director: director}
}

原本代理本地的服务没有问题, 代理到微信服务就404.
参考了一篇博客:
Go 语言实现 HTTP 层面的反向代理
加了一行代码:

func reverseProxy(target *url.URL) *httputil.ReverseProxy {
    targetQuery := target.RawQuery
    director := func(req *http.Request) {
        req.Host = target.Host // Different from the default NewSingleHostReverseProxy()
        req.URL.Scheme = target.Scheme
        req.URL.Host = target.Host
        req.URL.Path = singleJoiningSlash(target.Path, req.URL.Path)
        if targetQuery == "" || req.URL.RawQuery == "" {
            req.URL.RawQuery = targetQuery + req.URL.RawQuery
        } else {
            req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery
        }
        if _, ok := req.Header["User-Agent"]; !ok {
            req.Header.Set("User-Agent", "")
        }
    }
    return &httputil.ReverseProxy{Director: director}
}

反向代理成功.