//xml解析模塊
var XMLJS = require('xml2js');
//解析，將xml解析為json
var parser = new XMLJS.Parser();
//重組，將json重組為xml
var builder = new XMLJS.Builder(); 

//微信事件推送的入口
app.post('/yourapi', function(req, res, next) {
//獲取參數(shù)
var query = req.query; 
//簽名
var signature = query.signature; 
//輸出的字符，你填寫的TOKEN 
var echostr = query.echostr; 
//時(shí)間戳
var timestamp = query['timestamp']; 
//隨機(jī)字符串
var nonce = query.nonce; 
var oriArray = new Array(); 
oriArray[] = nonce; 
oriArray[] = timestamp; 
oriArray[] = appConfig.token;
//排序參數(shù)
oriArray.sort(); 
var original = oriArray[]+oriArray[]+oriArray[]; 
//加密
var scyptoString = sha(original); 
//判斷是否與你填寫TOKEN相等
if (signature == scyptoString) {
//獲取xml數(shù)據(jù)
req.on("data", function(data) {
//將xml解析
parser.parseString(data.toString(), function(err, result) {
var body = result.xml;
var messageType = body.MsgType[];
//用戶點(diǎn)擊菜單響應(yīng)事件
if(messageType === 'event') {
var eventName = body.Event[];
(EventFunction[eventName]||function(){})(body, req, res);
//自動(dòng)回復(fù)消息
}else if(messageType === 'text') {
EventFunction.responseNews(body, res);
//第一次填寫URL時(shí)確認(rèn)接口是否有效
}else {
res.send(echostr);
}
});
});
} else { 
//認(rèn)證失敗，非法操作
res.send("Bad Token!"); 
}
});
//微信客戶端各類回調(diào)用接口
var EventFunction = {
//關(guān)注
subscribe: function(result, req, res) {
//存入openid 通過微信的接口獲取用戶的信息同時(shí)存入數(shù)據(jù)庫。
},
//注銷
unsubscribe: function(openid, req, res) {
//刪除對(duì)應(yīng)id
},
//打開某個(gè)網(wǎng)頁
VIEW: function() {
//根據(jù)需求，處理不同的業(yè)務(wù)
},
//自動(dòng)回復(fù)
responseNews: function(body, res) {
//組裝微信需要的json
var xml = {xml: {
ToUserName: body.FromUserName,
FromUserName: body.ToUserName,
CreateTime: + new Date(),
MsgType: 'text',
Content: '編輯@+您想說的話，我們可以收到'
}};
var reciviMessage = body.Content[]
if(/^\@.*/.test(reciviMessage)) {
xml.xml.Content = '已經(jīng)收到您的建議，會(huì)及時(shí)處理！'
}<br>//將json轉(zhuǎn)為xml
xml = builder.buildObject(xml);<br>//發(fā)送給微信
res.send(xml);
}
}