本文實例講述了NodeJS簡單實現WebSocket功能。分享給大家供大家參考，具體如下：
我們基于express和socket.io開發，首先我們需要安裝以下包
npm install --save expressnpm install --save socket.io
服務器端代碼：
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');});客戶端代碼
<!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>一個控制臺版的聊天室做好了(^o^)/~
希望本文所述對大家nodejs程序設計有所幫助。
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