七牛的时间戳防盗链go语言

package main

import (
"crypto/md5"
"fmt"
"net/url"
"strings"
"time"
)

func main() {
urls :="http://pili-live-hdl.pilihu.echohu.top/huxicongPili/588773c868d03f791b030f4e.flv?123"
urltimestamps:=&urltimestamp{
urls,
0,
"123",

}
urlsign:=urltimestamps.timestamp()
fmt.Println(urlsign)
fmt.Println(time.Now().Unix())
}

type urltimestamp struct {
urls string
expecttime int64
sign_key string
}

func (urlInfo *urltimestamp)timestamp()string  {
data,err:=url.Parse(urlInfo.urls)
if err !=nil{
fmt.Println("er")

}
path:=data.Path
splitData:=strings.Split(path,".")
var sign_paths string
if len(splitData)!=1 {

sign_path:=splitData[0]
sign_paths= sign_path[1:]
}else {
sign_paths=splitData[0]
}
query:=data.RawQuery

expireTime :=fmt.Sprintf("%x", time.Now().Unix()+urlInfo.expecttime)

var sign_token string
if  query!=""{
sign_token = fmt.Sprintf("%s%s%s%s", urlInfo.sign_key, expireTime ,sign_paths,query)
}else {
sign_token = fmt.Sprintf("%s%s%s", urlInfo.sign_key, sign_paths, expireTime)
}
fmt.Println(sign_token)
sing:=md5_time(sign_token)
var urlget string

if  query!=""{
rebuildPath:=fmt.Sprintf("%s://%s%s",data.Scheme,data.Host,data.Path)
urlget=fmt.Sprintf(rebuildPath+"?s=%s&ts=%s&rid=%s",sing,expireTime,query)
}else{
urlget=fmt.Sprintf(urlInfo.urls+"?s=%s&ts=%s",sing,expireTime)

}

return urlget
}

func md5_time(str string) string {
md5H := md5.New()
md5H.Write([]byte(str))
sign := fmt.Sprintf("%x", md5H.Sum(nil))
return sign
}