frp/cmd/frpc/main.go

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// Copyright 2016 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.
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package main
import (
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"encoding/base64"
"encoding/json"
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"fmt"
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"io/ioutil"
"net/http"
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"os"
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"os/signal"
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"strconv"
"strings"
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"syscall"
"time"
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docopt "github.com/docopt/docopt-go"
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ini "github.com/vaughan0/go-ini"
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"github.com/fatedier/frp/client"
"github.com/fatedier/frp/models/config"
"github.com/fatedier/frp/utils/log"
"github.com/fatedier/frp/utils/version"
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)
var (
configFile string = "./frpc.ini"
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)
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var usage string = `frpc is the client of frp
Usage:
frpc [-c config_file] [-L log_file] [--log-level=<log_level>] [--server-addr=<server_addr>]
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frpc [-c config_file] --reload
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frpc -h | --help
frpc -v | --version
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Options:
-c config_file set config file
-L log_file set output log file, including console
--log-level=<log_level> set log level: debug, info, warn, error
--server-addr=<server_addr> addr which frps is listening for, example: 0.0.0.0:7000
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--reload reload configure file without program exit
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-h --help show this screen
-v --version show version
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`
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func main() {
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var err error
confFile := "./frpc.ini"
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// the configures parsed from file will be replaced by those from command line if exist
args, err := docopt.Parse(usage, nil, true, version.Full(), false)
if args["-c"] != nil {
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confFile = args["-c"].(string)
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}
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conf, err := ini.LoadFile(confFile)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
config.ClientCommonCfg, err = config.LoadClientCommonConf(conf)
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
config.ClientCommonCfg.ConfigFile = confFile
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// check if reload command
if args["--reload"] != nil {
if args["--reload"].(bool) {
req, err := http.NewRequest("GET", "http://"+
config.ClientCommonCfg.AdminAddr+":"+fmt.Sprintf("%d", config.ClientCommonCfg.AdminPort)+"/api/reload", nil)
if err != nil {
fmt.Printf("frps reload error: %v\n", err)
os.Exit(1)
}
authStr := "Basic " + base64.StdEncoding.EncodeToString([]byte(config.ClientCommonCfg.AdminUser+":"+
config.ClientCommonCfg.AdminPwd))
req.Header.Add("Authorization", authStr)
resp, err := http.DefaultClient.Do(req)
if err != nil {
fmt.Printf("frpc reload error: %v\n", err)
os.Exit(1)
} else {
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Printf("frpc reload error: %v\n", err)
os.Exit(1)
}
res := &client.GeneralResponse{}
err = json.Unmarshal(body, &res)
if err != nil {
fmt.Printf("http response error: %s\n", strings.TrimSpace(string(body)))
os.Exit(1)
} else if res.Code != 0 {
fmt.Printf("reload error: %s\n", res.Msg)
os.Exit(1)
}
fmt.Printf("reload success\n")
os.Exit(0)
}
}
}
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if args["-L"] != nil {
if args["-L"].(string) == "console" {
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config.ClientCommonCfg.LogWay = "console"
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} else {
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config.ClientCommonCfg.LogWay = "file"
config.ClientCommonCfg.LogFile = args["-L"].(string)
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}
}
if args["--log-level"] != nil {
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config.ClientCommonCfg.LogLevel = args["--log-level"].(string)
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}
if args["--server-addr"] != nil {
addr := strings.Split(args["--server-addr"].(string), ":")
if len(addr) != 2 {
fmt.Println("--server-addr format error: example 0.0.0.0:7000")
os.Exit(1)
}
serverPort, err := strconv.ParseInt(addr[1], 10, 64)
if err != nil {
fmt.Println("--server-addr format error, example 0.0.0.0:7000")
os.Exit(1)
}
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config.ClientCommonCfg.ServerAddr = addr[0]
config.ClientCommonCfg.ServerPort = serverPort
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}
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if args["-v"] != nil {
if args["-v"].(bool) {
fmt.Println(version.Full())
os.Exit(0)
}
}
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pxyCfgs, visitorCfgs, err := config.LoadProxyConfFromFile(config.ClientCommonCfg.User, conf, config.ClientCommonCfg.Start)
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if err != nil {
fmt.Println(err)
os.Exit(1)
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}
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log.InitLog(config.ClientCommonCfg.LogWay, config.ClientCommonCfg.LogFile,
config.ClientCommonCfg.LogLevel, config.ClientCommonCfg.LogMaxDays)
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svr := client.NewService(pxyCfgs, visitorCfgs)
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// Capture the exit signal if we use kcp.
if config.ClientCommonCfg.Protocol == "kcp" {
go HandleSignal(svr)
}
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err = svr.Run()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
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}
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func HandleSignal(svr *client.Service) {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
<-ch
svr.Close()
time.Sleep(250 * time.Millisecond)
os.Exit(0)
}