JS_socket.io简单使用

安装socket.io

npm install --save socket.io

demo目录

├── index.js
├── node_modules
├── package.json
└── views└── index.html

服务端代码

./index.js

const http = require('http');
const fs = require('fs');
const socketIO = require('socket.io');
const server = http.createServer((req, res) => {let html = fs.readFileSync('./views/index.html');res.end(html);
}).listen(3000, '127.0.0.1', () => {console.log('socket.io server is running at http://127.0.0.1:3000/');
});// socket io 操作
const io = socketIO(server);
io.sockets.on('connection', (socket) => {console.log('socket.io connected');// 监听socket断开事件socket.on('disconnect', () => {console.log('socket.io disconnected');});// 轮询进行 服务端推送 自定义事件let serverNum = 0;setInterval(() => {serverNum++;socket.emit('server.message', { serverNum: serverNum });}, 1000);// 监听客户端推送 自定义事件socket.on('client.message', (data) => {console.log('[client.message]', data)});});

客户端代码

./views/index.html

<!DOCTYPE html>
<html><head><title>demo</title>
</head><body><h1>socket.io demo</h1><!-- <script src="/socket.io/socket.io.js"></script> --><script src="https://cdn.socket.io/4.4.1/socket.io.min.js"></script><script>const socket = io.connect('http://127.0.0.1:3000');// 监听 socket 连接事件socket.on('connection', () => {console.log('socket.io connected');socket.open();});// 监听 socket 断开事件socket.on('disconnect', () => {console.log('socket.io disconnected');socket.close();});let clientNum = 0;// 轮询 推送客户端信息 到服务端setInterval(() => {clientNum++;socket.emit('client.message', { clientNum: clientNum });}, 1000);// 监听服务端 自定义信息事件socket.on('server.message', (data) => {console.log('[server.message]', data)});</script>
</body></html>