/
main.go
178 lines (159 loc) · 3.18 KB
/
main.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"github.com/kardianos/service"
"net"
"net/http"
"os"
"os/exec"
"runtime"
"strings"
)
var (
exit chan int = make(chan int)
logger service.Logger
)
type program struct{}
func getLocalAddr() map[string]string {
conn, err := net.Dial("udp", "www.baidu.com:80")
if err != nil {
logger.Error(err)
return nil
}
defer conn.Close()
addr := strings.Split(conn.LocalAddr().String(), ":")
return map[string]string{
"IP": addr[0],
"Port": addr[1],
}
}
func (p *program) Start(s service.Service) error {
go p.runUDP(s)
go p.runHttp(s)
return nil
}
type myHandler func(http.ResponseWriter, *http.Request)
func handleFunc(index int, command string) myHandler {
return func(w http.ResponseWriter, r *http.Request) {
logger.Info(command)
var cmd string
var args []string
switch runtime.GOOS {
case "windows":
cmd = "shutdown"
if index == 0 {
args = []string{"/f", "/p"}
} else {
args = []string{"/r", "/t", "0"}
}
default:
cmd = "shutdown"
if index == 0 {
args = []string{"-h", "now"}
} else {
args = []string{"-r", "now"}
}
}
w.Write([]byte("success"))
c := exec.Command(cmd, args...)
err := c.Run()
if err != nil {
logger.Error(err)
}
}
}
func (p *program) runHttp(s service.Service) {
var cmds []string = []string{"shut", "reboot"}
for index, command := range cmds {
http.HandleFunc(fmt.Sprintf("/%s", command), handleFunc(index, command))
}
logger.Info("http server start ...")
err := http.ListenAndServe(":7070", nil)
if err != nil {
logger.Error(err)
s.Stop()
return
}
}
func (p *program) runUDP(s service.Service) {
localAddr := getLocalAddr()
if localAddr == nil {
s.Stop()
return
}
socket, err := net.ListenUDP("udp4", &net.UDPAddr{
IP: net.IPv4(0, 0, 0, 0),
Port: 6060,
})
if err != nil {
logger.Error(err)
s.Stop()
return
}
logger.Info("udp server has start ...")
defer socket.Close()
out := make([]byte, 1024)
for {
select {
case <-exit:
return
default:
_, addr, err := socket.ReadFromUDP(out)
if err != nil {
logger.Error(err)
continue
}
//logger.Infof("receive [%v] data : %s \n", addr.IP, string(out))
hostname, err := os.Hostname()
if err != nil {
logger.Error(err)
hostname = "unknown"
}
resp := map[string]string{
"ip": localAddr["IP"],
"hostname": hostname,
}
r, err := json.Marshal(resp)
if err != nil {
logger.Error(err)
continue
}
socket.WriteToUDP(r, &net.UDPAddr{
IP: addr.IP,
Port: 6060,
})
}
}
}
func (p *program) Stop(s service.Service) error {
close(exit)
return nil
}
func main() {
controlFlag := flag.String("control", "", "{install|uninstall|start|stop}")
flag.Parse()
conf := &service.Config{
Name: "shuthelper_server",
DisplayName: "shuthelper server service",
Description: "remote host shutdown helper service ...",
}
p := &program{}
s, err := service.New(p, conf)
if err != nil {
panic(err)
}
logger, err = s.Logger(nil)
if err != nil {
panic(err)
}
if !strings.EqualFold(*controlFlag, "") {
err = service.Control(s, *controlFlag)
if err != nil {
panic(err)
}
return
}
s.Run()
}