frpc: add admin server for reload configure file

utils/net/http.go

@@ -0,0 +1,105 @@
+// Copyright 2017 fatedier, fatedier@gmail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package net
+
+import (
+	"compress/gzip"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+type HttpAuthWraper struct {
+	h      http.Handler
+	user   string
+	passwd string
+}
+
+func NewHttpBasicAuthWraper(h http.Handler, user, passwd string) http.Handler {
+	return &HttpAuthWraper{
+		h:      h,
+		user:   user,
+		passwd: passwd,
+	}
+}
+
+func (aw *HttpAuthWraper) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	user, passwd, hasAuth := r.BasicAuth()
+	if (aw.user == "" && aw.passwd == "") || (hasAuth && user == aw.user && passwd == aw.passwd) {
+		aw.h.ServeHTTP(w, r)
+	} else {
+		w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
+		http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+	}
+}
+
+func HttpBasicAuth(h http.HandlerFunc, user, passwd string) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		reqUser, reqPasswd, hasAuth := r.BasicAuth()
+		if (user == "" && passwd == "") ||
+			(hasAuth && reqUser == user && reqPasswd == passwd) {
+			h.ServeHTTP(w, r)
+		} else {
+			w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
+			http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+		}
+	}
+}
+
+func HttprouterBasicAuth(h httprouter.Handle, user, passwd string) httprouter.Handle {
+	return func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
+		reqUser, reqPasswd, hasAuth := r.BasicAuth()
+		if (user == "" && passwd == "") ||
+			(hasAuth && reqUser == user && reqPasswd == passwd) {
+			h(w, r, ps)
+		} else {
+			w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
+			http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+		}
+	}
+}
+
+type HttpGzipWraper struct {
+	h http.Handler
+}
+
+func (gw *HttpGzipWraper) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+		gw.h.ServeHTTP(w, r)
+		return
+	}
+	w.Header().Set("Content-Encoding", "gzip")
+	gz := gzip.NewWriter(w)
+	defer gz.Close()
+	gzr := gzipResponseWriter{Writer: gz, ResponseWriter: w}
+	gw.h.ServeHTTP(gzr, r)
+}
+
+func MakeHttpGzipHandler(h http.Handler) http.Handler {
+	return &HttpGzipWraper{
+		h: h,
+	}
+}
+
+type gzipResponseWriter struct {
+	io.Writer
+	http.ResponseWriter
+}
+
+func (w gzipResponseWriter) Write(b []byte) (int, error) {
+	return w.Writer.Write(b)
+}