gin-vue-admin/gin_server_admin/api/wechatapp/callback/apphandle.go

package callback

import (
	"encoding/json"
	"encoding/xml"
	"fmt"
	"strconv"
	"strings"
	"time"

	"github.com/flipped-aurora/gin-vue-admin/server/commonus"
	"github.com/flipped-aurora/gin-vue-admin/server/global"
	"github.com/flipped-aurora/gin-vue-admin/server/model/common/response"
	"github.com/flipped-aurora/gin-vue-admin/server/model/wechatcallback"
	"github.com/flipped-aurora/gin-vue-admin/server/wechatjiexi/wxbizmsgcrypt"
	"github.com/gin-gonic/gin"
)

//入口
func (a *CallBackApi) Index(c *gin.Context) {
	outPut := commonus.MapOut()
	response.Result(0, outPut, "企业微信回调入口", c)
}

//回调入口
func (a *CallBackApi) CallbackMessageApi(c *gin.Context) {
	MsgSignature := c.Query("msg_signature") //企业微信加密签名，msg_signature计算结合了企业填写的token、请求中的timestamp、nonce、加密的消息体。
	Timestamp := c.Query("timestamp")        //时间戳。与nonce结合使用，用于防止请求重放攻击。
	Nonce := c.Query("nonce")                //随机数。与timestamp结合使用，用于防止请求重放攻击。
	Echostr := c.Query("echostr")            //加密的字符串。需要解密得到消息内容明文，解密后有random、msg_len、msg、receiveid四个字段，其中msg即为消息内容明文

	var basicValueCallback CallBackData //企业微信回调基础参数
	basicValueCallback.MsgSignature = MsgSignature
	timeStampInt, timeStampIntErr := strconv.ParseInt(Timestamp, 10, 64)
	if timeStampIntErr == nil {
		basicValueCallback.Timestamp = timeStampInt
	}
	basicValueCallback.Nonce = Nonce
	if Echostr != "" {
		//Api地址验证
		basicValueCallback.Echostr = Echostr
		msgStr := basicValueCallback.VerificationUrl()
		c.String(200, msgStr)
	} else {
		var xmlMessageStr CallBackVerificationXml
		xmlErr := c.ShouldBindXML(&xmlMessageStr)
		if xmlErr != nil {
			response.Result(101, xmlErr, "XML获取错误！", c)
			return
		}
		// fmt.Printf("Xml----->%v\n", xmlMessageStr)
		basicValueCallback.ToUserName = xmlMessageStr.ToUserName.Text
		basicValueCallback.Encrypt = xmlMessageStr.Encrypt.Text
		basicValueCallback.AgentID = xmlMessageStr.AgentID.Text
		msgStr := basicValueCallback.DecryptMessage()
		c.String(200, msgStr)
	}
}

//启动企业微信验证程序
func WechatVerification() (wxcpt *wxbizmsgcrypt.WXBizMsgCrypt) {
	//正式数据
	// token := "kkUA3s2s3"
	token := global.GVA_CONFIG.WorkWechatSchool.WechatTokening
	receiverId := global.GVA_CONFIG.WorkWechatId.CompanyId
	encodingAeskey := global.GVA_CONFIG.WorkWechatSchool.EncodingAESKey

	// fmt.Printf("------->%v------->%v------->%v\n", token, receiverId, encodingAeskey)
	//测试数据
	// token := "QDG6eK"
	// receiverId := "wx5823bf96d3bd56c7"
	// encodingAeskey := "jWmYm7qr5nMoAUwZRjGtBxmz3KA1tkAj3ykkR6q2B2C"
	wxcpt = wxbizmsgcrypt.NewWXBizMsgCrypt(token, encodingAeskey, receiverId, wxbizmsgcrypt.XmlType)
	return
}

//验证URL
func (c *CallBackData) VerificationUrl() (msg string) {
	wecahtCpt := WechatVerification()
	timestampStr := strconv.FormatInt(c.Timestamp, 10)
	echoStr, cryptErr := wecahtCpt.VerifyURL(c.MsgSignature, timestampStr, c.Nonce, c.Echostr)
	var callbackLog wechatcallback.CallbackLog
	//
	callbackLog.MsgSignature = c.MsgSignature
	callbackLog.TimeStamp = c.Timestamp
	callbackLog.Nonce = c.Nonce
	callbackLog.Echostr = c.Echostr
	callbackLog.Xmlstr = string(echoStr)
	// callbackLog.Reqdata = string(reqData)
	callbackLog.AddTime = time.Now().Unix()
	global.GVA_DB_WechatCallBack.Create(&callbackLog)
	if nil != cryptErr {
		fmt.Println("verifyUrl fail", cryptErr)
	}
	msg = string(echoStr)
	return
	// fmt.Println(string(echoStr))
	// fmt.Print(string(echoStr))

}

//解析消息结构
func (c *CallBackData) DecryptMessage() (echoMsg string) {
	wecahtCpt := WechatVerification()
	timestampStr := strconv.FormatInt(c.Timestamp, 10)
	reqData := []byte("<xml><ToUserName><![CDATA[" + c.ToUserName + "]]></ToUserName><Encrypt><![CDATA[" + c.Encrypt + "]]></Encrypt><AgentID><![CDATA[" + c.AgentID + "]]></AgentID></xml>")
	msg, cryptErr := wecahtCpt.DecryptMsg(c.MsgSignature, timestampStr, c.Nonce, reqData)

	// fmt.Printf("%v=====>%v=====>%v\n: ", c.ToUserName, c.Encrypt, c.AgentID)
	if nil != cryptErr {
		fmt.Println("DecryptMsg fail", cryptErr)
	}
	// fmt.Println("after decrypt msg: ", string(msg))
	var msgContent MsgContent
	err := xml.Unmarshal(msg, &msgContent)
	if nil != err {
		fmt.Println("Unmarshal fail")
	}
	// fmt.Printf("1========>%v========>%v\n ", msgContent.MsgType, msgContent.Event)
	switch msgContent.MsgType {
	/*消息格式类型
	 */
	case "text": //文本
	case "image": //图片
	case "voice": //语音
	case "video": //视频
	case "location": //位置

	case "link": //链接
	/*事件格式类型*/
	case "event":
		/*
			事件附属格式
		*/
		echoMsg = EventProcessing(msgContent.Event, msg, c)
		return
	default:
	}

	var callbackLog wechatcallback.CallbackLog
	//
	callbackLog.MsgSignature = c.MsgSignature
	callbackLog.TimeStamp = c.Timestamp
	callbackLog.Nonce = c.Nonce
	callbackLog.Echostr = c.Echostr
	callbackLog.Xmlstr = string(msg)
	callbackLog.Reqdata = string(reqData)
	msgCont, jsonErr := json.Marshal(msgContent)
	if jsonErr == nil {
		callbackLog.Jsonstr = string(msgCont)
	}
	callbackLog.AddTime = time.Now().Unix()
	if msgContent.Event != "LOCATION" {
		global.GVA_DB_WechatCallBack.Create(&callbackLog)
	}
	return
}

//企业微信事件处理
func EventProcessing(event string, decryptMsg []byte, v *CallBackData) (msg string) {
	var msgContent MsgContentMailList
	err := xml.Unmarshal(decryptMsg, &msgContent)
	if nil != err {
		fmt.Println("Unmarshal fail")
	}
	switch event {
	case "subscribe": //关注
	case "unsubscribe": //取消关注
	case "enter_agent": //本事件在成员进入企业微信的应用时触发
	case "LOCATION": //上报地理位置
		GeographicalPosition(decryptMsg)
	case "batch_job_result": //异步任务完成事件推送
	case "change_contact": //通讯录变更事件
		WorkWechatMailList(msgContent.ChangeType, decryptMsg)
	case "click": //点击菜单拉取消息的事件推送
	case "view": //点击菜单跳转链接的事件推送
	case "scancode_push": //扫码推事件的事件推送
	case "scancode_waitmsg": //扫码推事件且弹出“消息接收中”提示框的事件推送
	case "pic_sysphoto": //弹出系统拍照发图的事件推送
	case "pic_photo_or_album": //弹出拍照或者相册发图的事件推送
	case "pic_weixin": //弹出微信相册发图器的事件推送
	case "location_select": //弹出地理位置选择器的事件推送
	case "open_approval_change": //审批状态通知事件  自建应用
		OpenApprovalChange(decryptMsg)
	case "sys_approval_change": //系统审批应用
	case "share_agent_change": //企业互联共享应用事件回调
	case "share_chain_change": //上下游共享应用事件回调
	case "template_card_event": //模板卡片事件推送

		var msgContent TemplateCardPush
		err := xml.Unmarshal(decryptMsg, &msgContent)
		if nil != err {
			fmt.Println("***********Unmarshal fail")
		}
		buttonClick := strings.Split(msgContent.EventKey, "_")
		buttonClickNAme := "已批准"
		if len(buttonClick) >= 3 {
			if buttonClick[2] != "1" {
				buttonClickNAme = "已驳回"
			}
		}
		fmt.Printf("***********%v------------->%v------------->%v\n", buttonClick, buttonClick[2], msgContent)
		xmlReply := fmt.Sprintf("<xml><ToUserName><![CDATA[%v]]></ToUserName><FromUserName><![CDATA[%v]]></FromUserName><CreateTime>%v</CreateTime><MsgType><![CDATA[update_button]]></MsgType><Button><ReplaceName><![CDATA[%v]]></ReplaceName></Button></xml>", msgContent.ToUsername, msgContent.FromUsername, msgContent.CreateTime, buttonClickNAme)
		wecahtCpt := WechatVerification()
		timestampStr := strconv.FormatInt(v.Timestamp, 10)
		encryptMsg, cryptErr := wecahtCpt.EncryptMsg(xmlReply, timestampStr, v.Nonce)
		if cryptErr == nil {
			msg = string(encryptMsg)
		} else {
			msg = "25000"
		}
		templateEventPush(decryptMsg)
	case "template_card_menu_event": //通用模板卡片右上角菜单事件推送
	default:
	}
	return
}

//企业微信通讯录变更事件处理
func WorkWechatMailList(changeType string, decryptMsg []byte) {
	switch changeType {
	case "create_party": //新增部门事件
	case "update_party": //更新部门事件
	case "delete_party": //删除部门事件
	case "update_tag": //标签成员变更事件
	case "batch_job_result": //异步任务完成事件推送
	case "change_contact": //通讯录变更事件

	case "create_user": //新增成员事件
	case "update_user": //更新成员事件
	case "delete_user": //删除成员事件

	default:
	}
}