服务器端代码：
var app = require('express')();var server = require('http').Server(app);var io = require('socket.io')(server);server.listen(8880);app.get('/', function (req, res) {res.sendFile(__dirname + '/index.html');});io.on('connection', function (socket) {console.log("connect comming from client: " + socket.id);socket.emit('messages_jerry', { hello: 'world greeting from Server!' });socket.on('messages', function (data) {console.log("data received from Client:" + JSON.stringify(data,2,2));});});
客户端代码：
// #!/usr/bin/env nodeconst io = require('socket.io-client');var socket = io.connect('http://localhost:8880');socket.on('messages_jerry', function (data) {console.log("data sent from Server:" + JSON.stringify(data,2,2));socket.emit('messages', { my: 'data sent from Client' });});socket.on('connect', function (socket2) {console.log('Connection with Server established!');socket.emit('messages', 'Client has established connection with Server');});
服务器端输出：
客户端输出：
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