mirror of
https://github.com/fatedier/frp.git
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116 lines
3.0 KiB
Go
116 lines
3.0 KiB
Go
// Copyright 2017 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package net
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import (
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"compress/gzip"
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"io"
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"net/http"
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"strings"
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"time"
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"github.com/fatedier/frp/pkg/util/util"
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)
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type HTTPAuthWrapper struct {
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h http.Handler
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user string
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passwd string
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}
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func NewHTTPBasicAuthWrapper(h http.Handler, user, passwd string) http.Handler {
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return &HTTPAuthWrapper{
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h: h,
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user: user,
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passwd: passwd,
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}
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}
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func (aw *HTTPAuthWrapper) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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user, passwd, hasAuth := r.BasicAuth()
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if (aw.user == "" && aw.passwd == "") || (hasAuth && user == aw.user && passwd == aw.passwd) {
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aw.h.ServeHTTP(w, r)
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} else {
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w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
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http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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}
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}
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type HTTPAuthMiddleware struct {
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user string
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passwd string
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authFailDelay time.Duration
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}
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func NewHTTPAuthMiddleware(user, passwd string) *HTTPAuthMiddleware {
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return &HTTPAuthMiddleware{
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user: user,
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passwd: passwd,
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}
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}
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func (authMid *HTTPAuthMiddleware) SetAuthFailDelay(delay time.Duration) *HTTPAuthMiddleware {
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authMid.authFailDelay = delay
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return authMid
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}
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func (authMid *HTTPAuthMiddleware) Middleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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reqUser, reqPasswd, hasAuth := r.BasicAuth()
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if (authMid.user == "" && authMid.passwd == "") ||
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(hasAuth && util.ConstantTimeEqString(reqUser, authMid.user) &&
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util.ConstantTimeEqString(reqPasswd, authMid.passwd)) {
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next.ServeHTTP(w, r)
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} else {
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if authMid.authFailDelay > 0 {
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time.Sleep(authMid.authFailDelay)
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}
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w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
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http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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}
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})
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}
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type HTTPGzipWrapper struct {
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h http.Handler
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}
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func (gw *HTTPGzipWrapper) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
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gw.h.ServeHTTP(w, r)
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return
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}
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w.Header().Set("Content-Encoding", "gzip")
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gz := gzip.NewWriter(w)
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defer gz.Close()
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gzr := gzipResponseWriter{Writer: gz, ResponseWriter: w}
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gw.h.ServeHTTP(gzr, r)
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}
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func MakeHTTPGzipHandler(h http.Handler) http.Handler {
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return &HTTPGzipWrapper{
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h: h,
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}
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}
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type gzipResponseWriter struct {
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io.Writer
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http.ResponseWriter
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}
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func (w gzipResponseWriter) Write(b []byte) (int, error) {
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return w.Writer.Write(b)
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}
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