使用NodeJs 开发微信公众号（三)微信事件交互实例

//xml解析模块var XMLJS = require('xml2js');//解析，将xml解析为jsonvar parser = new XMLJS.Parser();//重组，将json重组为xmlvar builder = new XMLJS.Builder(); 

//微信事件推送的入口app.post('/yourapi', function(req, res, next) {//获取参数var query = req.query; //签名var signature = query.signature; //输出的字符，你填写的TOKEN var echostr = query.echostr; //时间戳var timestamp = query['timestamp']; //随机字符串var nonce = query.nonce; var oriArray = new Array(); oriArray[] = nonce; oriArray[] = timestamp; oriArray[] = appConfig.token;//排序参数oriArray.sort(); var original = oriArray[]+oriArray[]+oriArray[]; //加密var scyptoString = sha(original); //判断是否与你填写TOKEN相等if (signature == scyptoString) {//获取xml数据req.on("data", function(data) {//将xml解析parser.parseString(data.toString(), function(err, result) {var body = result.xml;var messageType = body.MsgType[];//用户点击菜单响应事件if(messageType === 'event') {var eventName = body.Event[];(EventFunction[eventName]||function(){})(body, req, res);//自动回复消息}else if(messageType === 'text') {EventFunction.responseNews(body, res);//第一次填写URL时确认接口是否有效}else {res.send(echostr);}});});} else { //认证失败，非法操作res.send("Bad Token!"); }});//微信客户端各类回调用接口var EventFunction = {//关注subscribe: function(result, req, res) {//存入openid 通过微信的接口获取用户的信息同时存入数据库。},//注销unsubscribe: function(openid, req, res) {//删除对应id},//打开某个网页VIEW: function() {//根据需求，处理不同的业务},//自动回复responseNews: function(body, res) {//组装微信需要的jsonvar xml = {xml: {ToUserName: body.FromUserName,FromUserName: body.ToUserName,CreateTime: + new Date(),MsgType: 'text',Content: '编辑@+您想说的话，我们可以收到'}};var reciviMessage = body.Content[]if(/^/@.*/.test(reciviMessage)) {xml.xml.Content = '已经收到您的建议，会及时处理！'}<br>//将json转为xmlxml = builder.buildObject(xml);<br>//发送给微信res.send(xml);}}