jypkg/common/src/qfw/util/jy/appToken.go

package jy

import (
	"encoding/base64"
	"encoding/json"
	"fmt"
	qutil "app.yhyue.com/moapp/jybase/common"
	"strings"
)

//用户信息
type WxUserInfo struct {
	City         string `json:"city"`
	Country      string `json:"country"`
	CreateTime   int64  `json:"createtime"`
	HeadImageUrl string `json:"headimgurl"`
	Nickname     string `json:"nickname"`
	OpenId       string `json:"openid"`
	Province     string `json:"province"`
	Sex          int    `json:"sex"`
	Sign         string `json:"sign"`
	UnionId      string `json:"unionid"`
}

func GetMsgFromWxSign(sign string) (wxinfo *WxUserInfo, err error) {
	wxinfo = &WxUserInfo{}
	if sign == "" {
		err = fmt.Errorf("获取信息异常,参数为空")
		return
	}
	b, decodeErr := base64.StdEncoding.DecodeString(strings.Replace(sign, " ", "+", -1))
	if decodeErr != nil {
		err = fmt.Errorf("获取信息异常,解密失败")
		return
	}
	UnmarshalErr := json.Unmarshal(b, &wxinfo)
	if UnmarshalErr != nil {
		err = fmt.Errorf("获取信息异常,格式异常")
		return
	}
	//做比对，防篡改
	checkSign := qutil.GetMd5String(fmt.Sprintf("city=%s&country=%s&createtime=%d&headimgurl=%s&nickname=%s&openid=%s&province=%s&sex=%d&unionid=%s",
		wxinfo.City, wxinfo.Country, wxinfo.CreateTime, wxinfo.HeadImageUrl, wxinfo.Nickname, wxinfo.OpenId, wxinfo.Province, wxinfo.Sex, wxinfo.UnionId))
	if wxinfo.Sign != checkSign {
		err = fmt.Errorf("获取信息异常,校验错误")
		return
	}
	if wxinfo.OpenId == "" {
		err = fmt.Errorf("获取信息异常,openid为空")
		return
	}
	return
}