frp/server/dashboard.go

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// 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 server
import (
"compress/gzip"
"fmt"
"io"
"net"
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"net/http"
"strings"
"time"
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"github.com/fatedier/frp/assets"
"github.com/fatedier/frp/models/config"
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"github.com/julienschmidt/httprouter"
)
var (
httpServerReadTimeout = 10 * time.Second
httpServerWriteTimeout = 10 * time.Second
)
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func RunDashboardServer(addr string, port int64) (err error) {
// url router
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router := httprouter.New()
// api, see dashboard_api.go
router.GET("/api/serverinfo", httprouterBasicAuth(apiServerInfo))
router.GET("/api/proxy/tcp", httprouterBasicAuth(apiProxyTcp))
router.GET("/api/proxy/udp", httprouterBasicAuth(apiProxyUdp))
router.GET("/api/proxy/http", httprouterBasicAuth(apiProxyHttp))
router.GET("/api/proxy/https", httprouterBasicAuth(apiProxyHttps))
router.GET("/api/proxy/traffic/:name", httprouterBasicAuth(apiProxyTraffic))
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// view
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router.Handler("GET", "/favicon.ico", http.FileServer(assets.FileSystem))
router.Handler("GET", "/static/*filepath", MakeGzipHandler(basicAuthWraper(http.StripPrefix("/static/", http.FileServer(assets.FileSystem)))))
router.HandlerFunc("GET", "/", basicAuth(func(w http.ResponseWriter, r *http.Request) {
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http.Redirect(w, r, "/static/", http.StatusMovedPermanently)
}))
address := fmt.Sprintf("%s:%d", addr, port)
server := &http.Server{
Addr: address,
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Handler: router,
ReadTimeout: httpServerReadTimeout,
WriteTimeout: httpServerWriteTimeout,
}
if address == "" {
address = ":http"
}
ln, err := net.Listen("tcp", address)
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if err != nil {
return err
}
go server.Serve(ln)
return
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}
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func use(h http.HandlerFunc, middleware ...func(http.HandlerFunc) http.HandlerFunc) http.HandlerFunc {
for _, m := range middleware {
h = m(h)
}
return h
}
type AuthWraper struct {
h http.Handler
user string
passwd string
}
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func (aw *AuthWraper) 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 {
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w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
}
}
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func basicAuthWraper(h http.Handler) http.Handler {
return &AuthWraper{
h: h,
user: config.ServerCommonCfg.DashboardUser,
passwd: config.ServerCommonCfg.DashboardPwd,
}
}
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func basicAuth(h http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
user, passwd, hasAuth := r.BasicAuth()
if (config.ServerCommonCfg.DashboardUser == "" && config.ServerCommonCfg.DashboardPwd == "") ||
(hasAuth && user == config.ServerCommonCfg.DashboardUser && passwd == config.ServerCommonCfg.DashboardPwd) {
h.ServeHTTP(w, r)
} else {
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
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}
}
}
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func httprouterBasicAuth(h httprouter.Handle) httprouter.Handle {
return func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
user, passwd, hasAuth := r.BasicAuth()
if (config.ServerCommonCfg.DashboardUser == "" && config.ServerCommonCfg.DashboardPwd == "") ||
(hasAuth && user == config.ServerCommonCfg.DashboardUser && passwd == config.ServerCommonCfg.DashboardPwd) {
h(w, r, ps)
} else {
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
}
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}
}
type GzipWraper struct {
h http.Handler
}
func (gw *GzipWraper) 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 MakeGzipHandler(h http.Handler) http.Handler {
return &GzipWraper{
h: h,
}
}
type gzipResponseWriter struct {
io.Writer
http.ResponseWriter
}
func (w gzipResponseWriter) Write(b []byte) (int, error) {
return w.Writer.Write(b)
}