Nodejs 实现 WebSocket 太容易了吧！！

时间：2021-09-30 16:26:19

我们基于express和socket.io开发，首先我们需要安装以下包

npm install --save express

npm install --save socket.io

服务器端代码：

var app = require('express')();

var http = require('http').Server(app);

var io = require('socket.io')(http);

app.get('/', function(req, res){

    res.send('<h1>Welcome Realtime Server</h1>');

});

io.on('connection', function(socket){

    console.log('a user connected');

    socket.on("disconnect", function() {

        console.log("a user go out");

    });

    socket.on("message", function(obj) {

        io.emit("message", obj);

    });

});

http.listen(3000, function(){

    console.log('listening on *:3000');

});

客户端代码

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Document</title>

    <script src="http://127.0.0.1:3000/socket.io/socket.io.js"></script>

</head>

<body>

    <ul id="message"></ul>

    <script>

        socket = io.connect('ws://127.0.0.1:3000');

        socket.emit("message", {"name" : navigator.userAgent, "msg" : "hello world"});

        socket.on("message", function(obj) {

            console.log(obj);

        });

    </script>

</body>

</html>

一个控制台版的聊天室做好了(^o^)/

原文链接: http://blog.csdn.net/sbt0198/article/details/51604001

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