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autoupdate.go
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autoupdate.go
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/*
* Author: gao88<[email protected]>
* Created Time: 2016-08-17 9:30
* Last Modified: 2016-08-18 18:02:36
* File Name: updatesvr.go
* Description:当统计在线人数为0时,而且自已的MD5和上次不一样,则自动重启并更新自已,监控程序可以自己写或用supervisor等工具,让监控程序拉起服务。
*/
package autoupdate
import (
"os"
"time"
"strings"
"runtime"
"errors"
"log"
"io"
"fmt"
"os/exec"
"path/filepath"
"crypto/md5"
"encoding/hex"
)
var updateSvrInstance = &UpdateSvr{}
type UpdateSvr struct {
svrExeDir string
svrExeName string
svrExeMd5 string
count int32
logger *log.Logger
}
func init() {
initUpdateSvr()
}
func PushCount(count int32) {
if updateSvrInstance == nil {
return
}
updateSvrInstance.count = count
}
func initUpdateSvr() {
svrExePath := getCurExePath()
var substr string
if "windows" == runtime.GOOS {
substr = "\\"
} else {
substr = "/"
}
updateSvrInstance = &UpdateSvr{}
updateSvrInstance.svrExeDir = getFilePath(svrExePath) + substr
updateSvrInstance.svrExeName = getFileName(svrExePath)
initLogger()
md5, err := getFileMd5(svrExePath)
if err != nil {
fmt.Println(err)
return
}
updateSvrInstance.svrExeMd5 = md5
fmt.Println("svrExePath:", updateSvrInstance.svrExeDir, ", svrExeName:", updateSvrInstance.svrExeName, ", svrExeMd5:", updateSvrInstance.svrExeMd5)
go updateSvrInstance.onTimer()
}
func getCurExePath() string {
return os.Args[0]
}
func getFilePath(filePath string) string {
file, _ := exec.LookPath(filePath)
path, _ := filepath.Abs(file)
var substr string
if "windows" == runtime.GOOS {
substr = "\\"
} else {
substr = "/"
}
path = string(path[0:strings.LastIndex(path, substr)])
return path
}
func getFileName(filePath string) string {
var substr string
if "windows" == runtime.GOOS {
substr = "\\"
} else {
substr = "/"
}
return string(filePath[strings.LastIndex(filePath, substr)+1:])
}
func getFileMd5(filePath string) (str string, err error) {
file, err := os.Open(filePath)
if err != nil {
return "", err
}
md5h := md5.New()
io.Copy(md5h, file)
md5Str := md5h.Sum([]byte(""))
if len(md5Str) == 0 {
return "", errors.New("len(md5Str) == 0")
}
return hex.EncodeToString(md5Str), nil
}
func killAll(processName string) error {
cmd := exec.Command("killall", processName)
err := cmd.Start()
if err != nil {
fmt.Println(err)
return err
}
fmt.Println("kill:", processName)
return nil
}
func startProcess(fileDir string, fileName string) *os.Process {
if fileDir == "" || fileName == "" {
return nil
}
cmd := exec.Command("./"+fileName, "-d=true")
cmd.Dir = fileDir
err := cmd.Run()
if err == nil {
fmt.Println("Start, fileDir:", fileDir, ", fileName:", fileName, ", OK!")
} else {
fmt.Println("Error:", err)
}
return cmd.Process
}
func initLogger() {
cdir, err := os.Getwd()
if err != nil {
fmt.Println("err:", err.Error())
}
path := cdir
if "windows" == runtime.GOOS {
path = path + "\\..\\log\\"
} else {
path = path + "/../log/"
}
err = os.MkdirAll(path, 0777)
logFile, err := os.OpenFile(path+"update_svr.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0777)
if err != nil {
fmt.Printf("open file error=%s\r\n", err.Error())
os.Exit(-1)
}
writers := []io.Writer{
logFile,
}
fileAndStdoutWriter := io.MultiWriter(writers...)
updateSvrInstance.logger = log.New(fileAndStdoutWriter, "", log.Ldate|log.Ltime)
}
func updateLog(log string) {
if updateSvrInstance != nil && updateSvrInstance.logger != nil {
updateSvrInstance.logger.Println(log)
}
}
func (this *UpdateSvr) onTimer() {
fmt.Println("onTimer...")
for {
newSvrMd5, err := getFileMd5(this.svrExeDir + this.svrExeName)
if err != nil {
fmt.Println(err)
time.Sleep(3 * time.Second)
continue
}
if newSvrMd5 == "" {
fmt.Println("newSvrMd5 == \"\"")
time.Sleep(3 * time.Second)
continue
}
//fmt.Println("svrExeFileMd5:", this.svrExeMd5, ", newSvrMd5:", newSvrMd5, ", robotMd5:", this.robotMd5, ", newRobotMd5:", newRobotMd5, ", count:", this.count)
if this.svrExeMd5 != newSvrMd5 && this.count <= 0 {
fmt.Println("Server exit, svrExeFileMd5:", this.svrExeMd5, ", newSvrMd5:", newSvrMd5, ", count:", this.count)
updateLog("update: " + updateSvrInstance.svrExeName)
os.Exit(-1)
return
}
time.Sleep(10 * time.Second)
}
}