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我试图在将请求代理到远程服务器之前,通过调用REST API来验证用户身份。 然而,我发现,如果我做代理到远程服务器之前的API调用,请求将失败,出现以下错误:具有自定义身份验证的Golang反向代理
http: proxy error: http: ContentLength=139 with Body length 0.
如果我删除代理到远程服务器之前的API调用,请求能得到通过并返回正确的回应。
我中间件如下:
func AuthMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// the api call to external auth server
user_id, err := authenticate(r.FormValue("username"), r.FormValue("password"))
if err != nil {
http.Error(w, err.Error(), 401)
return
}
next.ServeHTTP(w, r)
})
}
我的反向代理是如下:
func NewReverseProxy(target *url.URL) *httputil.ReverseProxy {
director := func(req *http.Request) {
req.URL.Scheme = target.Scheme
req.URL.Host = target.Host
req.URL.Path = target.Path
targetQuery := target.RawQuery
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 &httputil.ReverseProxy{Director: director}
}
,我使用智路由
r.Use(AuthMiddleware)
r.Post("/", NewReverseProxy(targets).ServeHTTP)
问题是什么用这个实现?
,想到的第一件事是:你读身体并关闭它? – RickyA
http://stackoverflow.com/questions/31337891/net-http-http-contentlength-222-with-body-length-0 – RickyA
[net/http:http:ContentLength = 222与身体长度0]的可能重复( http://stackoverflow.com/questions/31337891/net-http-http-contentlength-222-with-body-length-0) – stderr