package controller

import (
	"crypto/sha1"
	"encoding/hex"
	"fmt"
	"github.com/gin-gonic/gin"
	"sort"
)

const (
	TOKEN          = "QoI6tG856JFGLZaWy2ljffJlkBOYeU"
	ENCODINGAESKEY = "QoI6tG856JFGLZaWy2ljffJlkBOYeU6GSfGuzpt18Pu"
)

//func checkout(response http.ResponseWriter, request *http.Request)  {
func WxMsg(c *gin.Context) {
	// 获取参数
	signature := c.PostForm("signature")
	timestamp := c.PostForm("timestamp")
	nonce := c.PostForm("nonce")
	echostr := c.PostForm("echostr")

	//timestamp := request.FormValue("echostr")
	//nonce := request.FormValue("nonce")
	//echostr := request.FormValue("echostr")

	//将token、timestamp、nonce三个参数进行字典序排序
	var tempArray = []string{TOKEN, timestamp, nonce}
	sort.Strings(tempArray)

	//将三个参数字符串拼接成一个字符串进行sha1加密
	var sha1String string = ""
	for _, v := range tempArray {
		sha1String += v
	}

	h := sha1.New()
	h.Write([]byte(sha1String))
	sha1String = hex.EncodeToString(h.Sum([]byte("")))

	//获得加密后的字符串可与signature对比
	if sha1String == signature {
		_, err := c.Writer.Write([]byte(echostr))
		if err != nil {
			fmt.Println("响应失败。。。")
		}
	} else {
		fmt.Println("验证失败")
	}
}