本文介绍了node.js 用socket实现聊天的示例代码，分享给大家，也给自己留个笔记，具体如下：
服务器搭建
app.js
const http = require("http");
const express = require("./express");
//创建一个服务
const server = http.createServer(express);
//监听服务端口
server.listen(8001,()=>{
console.log("服务端已经启动,请访问 http://localhost:8001");
});
express.js
const url=require("url");
const fs=require("fs");
function express(req,res){
var urlObj=url.parse(req.url);
//console.log(urlObj);
var filePath="./www"+urlObj.pathname;
var content="not found";
if(fs.existsSync(filePath)){
content=fs.readFileSync(filePath);
}
res.end(content.toString());
}
module.exports=express;
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>Socket.IO chat</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="js/lib/jquery-1.11.1.js"></script>
<script src="js/lib/socket.io.js"></script>
<script src="js/index.js"></script>
</body>
</html>
客户端服务搭建与服务端通信
我们要建立服务端socket请求连接
io.on('connection', function(socket){
console.log('a user connected');
//断开连接
socket.on('disconnect', function(){
console.log('user disconnected');
});
});
index.js
//客户端建立连接
var socket = io();
客户端向服务端发送请求
index.js
$('form').submit(function(){
//触发事件
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
app.js
//接收客户端的信息
socket.on('chat message', function(msg){
console.log('message: ' + msg);
});
将服务端的数据广播到客户端去
socket.on('chat message', function(msg){
console.log('message: ' + msg);
socket.broadcast.emit("clientE",msg);
});
客户端接收服务端广播出来的数据
socket.on('clientE', function(msg){
$('#messages').append($('<li>').text(msg));
});
