package utils

import (
	"bytes"
	"crypto/md5"
	"encoding/hex"
	"strconv"
	"sync/atomic"
	"time"
)

var seed int32

func init() {
	seed = 0
}

func TunnelID() string {
	nowString := time.Now().String() + strconv.Itoa(int(seed))
	atomic.AddInt32(&seed, 1) //避免多线程情况下获得的种子相同
	md5Byte := md5.Sum(bytes.NewBufferString(nowString).Bytes())
	return hex.EncodeToString(md5Byte[:])
}