Golang 日志调试

日志调用:

m是一个结构体

mstring,_ := json.Marshal(m)

params := map[string]string{
             "type": string(mstring),
}

jsonParams, _ := json.Marshal(params)
util.WriteLog("message.log", string(jsonParams))

log.go

package util

import (
   "io"
   "os"
   "time"
)

const (
   //LOGPATH  LOGPATH/time.Now().Format(FORMAT)/*.log
   LOGPATH = "log/"
   //FORMAT .
   FORMAT = "20060102"
   //LineFeed 换行
   LineFeed = "\r\n"
)

//以天为基准,存日志
var path = "/home/liufei/golang/src/message/" + time.Now().Format(FORMAT) + "/"

//WriteLog return error
func WriteLog(fileName string, msg string) error {
   if !IsExist(path) {
      return CreateDir(path)
   }
   var (
      err error
      f   *os.File
   )

   f, err = os.OpenFile(path+fileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
   _, err = io.WriteString(f, LineFeed+msg)

   //f, err = os.OpenFile(path+fileName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
   //_, err = io.WriteString(f, LineFeed)
   //_, err = io.WriteString(f, msg)

   defer f.Close()
   return err
}

//CreateDir  文件夹创建
func CreateDir(path string) error {
   err := os.MkdirAll(path, os.ModePerm)
   if err != nil {
      return err
   }
   os.Chmod(path, os.ModePerm)
   return nil
}

//IsExist  判断文件夹/文件是否存在  存在返回 true
func IsExist(f string) bool {
   _, err := os.Stat(f)
   return err == nil || os.IsExist(err)
}