express 怎么搭建 WebSocket 服务器

一:使用 express-ws

javascript 复制代码
var express = require('express');
var app = express();
var expressWs = require('express-ws')(app);

app.use(function (req, res, next) {
  console.log('middleware');
  req.testing = 'testing';
  return next();
});

app.get('/', function(req, res, next){
  console.log('get route', req.testing);
  res.end();
});

app.ws('/path', function(ws, req) {
  console.log('socket', req.testing);
  ws.on('message', function(msg) {
    console.log('message', msg);
    ws.send(msg);
  });
});

app.listen(3000);

客户端

html 复制代码
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebSocket Example</title>
</head>
<body>
    <script>
        const ws = new WebSocket('ws://localhost:3000/path');

        ws.onopen = () => {
            console.log('Connected to the server');
            ws.send('Hello Server!');
        };

        ws.onmessage = (event) => {
            console.log(`Message from server: ${event.data}`);
        };

        ws.onclose = () => {
            console.log('Disconnected from the server');
        };
    </script>
</body>
</html>

二:使用 Socket.IO

javascript 复制代码
const express = require('express');
const http = require('http');
const socketIo = require('socket.io');

const app = express();
const server = http.createServer(app);

const io = socketIo(server, {
    path: '/path', // 设置Socket.IO的路径
    cors: {
      origin: "*"
    }
});

io.on('connection', (socket) => {
    console.log('New client connected');
    
    socket.on('message', (message) => {
        console.log(`Received message => ${message}`);
        
        // Broadcast the message to all clients
        io.emit('message', `Server: ${message}`);
    });

    socket.on('disconnect', () => {
        console.log('Client disconnected');
    });
});

server.listen(3000, () => {
    console.log('Server is listening on port 3000');
});

客户端:

html 复制代码
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Socket.IO Example</title>
    <script src="https://cdn.socket.io/4.7.5/socket.io.min.js" integrity="sha384-2huaZvOR9iDzHqslqwpR87isEmrfxqyWOF7hr7BY6KG0+hVKLoEXMPUJw3ynWuhO" crossorigin="anonymous"></script>
</head>
<body>
    <script>
        const socket = io('http://localhost:3000', {
          path: '/path'
        });

        socket.on('connect', () => {
            console.log('Connected to the server');
            socket.send('Hello Server!');
        });

        socket.on('message', (message) => {
            console.log(`Message from server: ${message}`);
        });

        socket.on('disconnect', () => {
            console.log('Disconnected from the server');
        });
    </script>
</body>
</html>
相关推荐
年纪轻轻就扛不住40 分钟前
Express 入门指南(超详细教程)
前端·前端框架·node.js·express·js
车载测试工程师2 小时前
汽车功能安全-嵌入式软件测试(软件合格性测试)【目的、验证输入、集成&验证要求】11
功能测试·网络协议·测试工具·安全·车载系统·汽车·测试覆盖率
IPdodo全球网络服务4 小时前
什么是IP关联?跨境卖家如何有效避免IP关联?
网络·网络协议·tcp/ip
kfepiza6 小时前
`nmcli con add type vlan`中的: `ifname` , `dev` ,`vlan.parent`, `id`,`vlan.id`
linux·网络协议·tcp/ip
kfepiza6 小时前
Linux的NetworkManager的`nmcli connection add` 笔记250712
linux·网络协议·tcp/ip
敲上瘾6 小时前
传输层协议UDP原理
linux·c语言·网络·网络协议·udp
搞前端的小菜7 小时前
从零实现一个GPT 【React + Express】--- 【4】实现文生图的功能
gpt·react.js·express
叫我菜菜就好8 小时前
【node后端】搭建项目(Express+Ts+Typeorm+Mysql一步到位)
mysql·oracle·express
程序小武1 天前
网络请求的基本概念、原理及生活化解析
网络协议
前端小盆友1 天前
从零实现一个GPT 【React + Express】--- 【5】实现网页生成能力
gpt·react.js·express