调整优化

@@ -32,55 +32,12 @@ func (controller *ReverseProxyController) SuplusSaleApp() {
 		panic(err)
 	}
 	controller.Ctx.Request.URL.Path = strings.Replace(controller.Ctx.Request.URL.Path, "/suplus-sale-app", "", 1)
-	targetQuery := target.RawQuery
-	directorFunc := func(req *http.Request) {
-		req.Host = target.Host
-		req.URL.Scheme = target.Scheme
-		req.URL.Host = target.Host
-		req.URL.Path, req.URL.RawPath = joinURLPath(target, controller.Ctx.Request.URL)
-		if targetQuery == "" || req.URL.RawQuery == "" {
-			req.URL.RawQuery = targetQuery + req.URL.RawQuery
-		} else {
-			req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery
+	newProxy := httputil.NewSingleHostReverseProxy(target)
+	directorFunc := newProxy.Director
+	newDirectorFunc := func(r *http.Request) {
+		directorFunc(r)
+		r.Host = target.Host
 	}
-		if _, ok := req.Header["User-Agent"]; !ok {
-			// explicitly disable User-Agent so it's not set to default value
-			req.Header.Set("User-Agent", "")
-		}
-	}
-	newProxy := &httputil.ReverseProxy{Director: directorFunc}
+	newProxy.Director = newDirectorFunc
 	newProxy.ServeHTTP(controller.Ctx.ResponseWriter, controller.Ctx.Request)
 }
-
-func joinURLPath(a, b *url.URL) (path, rawpath string) {
-	if a.RawPath == "" && b.RawPath == "" {
-		return singleJoiningSlash(a.Path, b.Path), ""
-	}
-	// Same as singleJoiningSlash, but uses EscapedPath to determine
-	// whether a slash should be added
-	apath := a.EscapedPath()
-	bpath := b.EscapedPath()
-
-	aslash := strings.HasSuffix(apath, "/")
-	bslash := strings.HasPrefix(bpath, "/")
-
-	switch {
-	case aslash && bslash:
-		return a.Path + b.Path[1:], apath + bpath[1:]
-	case !aslash && !bslash:
-		return a.Path + "/" + b.Path, apath + "/" + bpath
-	}
-	return a.Path + b.Path, apath + bpath
-}
-
-func singleJoiningSlash(a, b string) string {
-	aslash := strings.HasSuffix(a, "/")
-	bslash := strings.HasPrefix(b, "/")
-	switch {
-	case aslash && bslash:
-		return a + b[1:]
-	case !aslash && !bslash:
-		return a + "/" + b
-	}
-	return a + b
-}