websocket-demo

参考资料

https://socket.io/get-started/chat/
https://www.imooc.com/learn/861

下载依赖包

npm install --save [email protected]
npm install --save socket.io

前端代码

    
    
    


    

    

      Send
    
    
    
    

后端代码

// https://socket.io/get-started/chat/ 参考资料
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

var userNum = 0 

app.get('/', function(req, res){
  res.sendFile(__dirname + '/index.html');
});

io.on('connection', function(socket) {
    userNum++
    socket.nickname = 'user' + userNum
    io.emit('enter', socket.nickname + ' 进入')

    socket.on('message', function(msg){
        console.log('message: ' + msg);
        io.emit('message', socket.nickname + '  say： ' + msg);
    });

    socket.on('disconnect', function(){
        io.emit('leave', socket.nickname + '  left ');
    });
});

http.listen(3000, function(){
  console.log('listening on *:3000');
});

node server.js 启动即可

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