Nodejs socketIO

//前端部分





    
    
    
    
    



    

    

        发送
    

//后端部分

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.get('/', function (req, res) {//定义路由
    res.sendFile(__dirname + '/socketDemo.html');//读取静态文件
});
let socketWall;
io.on('connection', function (socket) {//监听connection事件
    
    socket.on('chats',function(msg){//监听该通道名称，我像该通道发送了socket.id
        socketWall = msg;
        console.log('用户'+socketWall+'连接了');
    });
    socket.on('chat message', function (msg) {//监听该通道，函数内额参数就是客户端发送的消息
        console.log(socketWall);
        io.emit('chat message', '用户'+socketWall+'说：'+msg);//利用emit向该通道返回该数据
    });

    socket.on('disconnect', function () {//监听用户退出状态
        console.log('用户'+socketWall+'退出');
    });
});

http.listen(8100, function () {//服务程序
    console.log('listening on *:8100');
});