Socket 编程
一、基于 Net 模块的 Socket 编程
1.1 ServerSocket.js
代码语言：javascript复制const net = require('net')
const server = new net.createServer()
let clients = {}
let clientName = 0
server.on('connection', (client) => {
client.name = clientName
clients[client.name] = client
client.on('data', (msg) => {
// console.log('客户端传来：' msg);
broadcast(client, msg.toString())
})
client.on('error', (e) => {
console.log('client error' e);
client.end()
})
client.on('close', (data) => {
delete clients[client.name]
console.log(client.name ' 下线了');
})
})
function broadcast(client, msg) {
for (var key in clients) {
clients[key].write(client.name ' 说：' msg)
}
}
server.listen(9000, 'localhost')1.2 ClientSocket.js
代码语言：javascript复制var net = require('net')
const readline = require('readline')
var port = 9000
var host = '127.0.0.1'
var socket = new net.Socket()
socket.setEncoding = 'UTF-8'
socket.connect(port, host, () => {
socket.write('hello.')
})
socket.on('data', (msg) => {
console.log(msg.toString())
say()
})
socket.on('error', function (err) {
console.log('error' err);
})
socket.on('close', function () {
console.log('connection closeed');
})
const r1 = readline.createInterface({
input: process.stdin,
output: process.stdout
})
function say() {
r1.question('请输入：n', (inputMsg) => {
if (inputMsg != 'bye') {
// socket.write(inputMsg 'n')
} else {
socket.destroy()
r1.close()
}
})
}二、基于 WebSocket 的 Socket 编程
2.1 WebSocketServer.js
代码语言：javascript复制const WebSocket = require('ws')
const ws = new WebSocket.Server({ port: 8081 })
let clients = {}
let clientName = 0
ws.on('connection', (client) => {
client.name = clientName
clients[client.name] = client
client.on('message', (msg) => {
broadcast(client, msg)
})
client.on('close', () => {
delete clients[client.name]
console.log(client.name ' 离开了~')
})
})
function broadcast(client, msg) {
for (var key in clients) {
clients[key].send(client.name ' 说：' msg)
}
}2.2 index.html
代码语言：html复制<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>WebSocket</title>
<script src="WsClient.js" charset="utf-8"></script>
</head>
<body>
<h1>gp 交流区</h1>
<div id="content" name="name" style="overflow-y: scroll; width: 400px; height: 300px; border: solid 1px #000"></div>
<br />
<div>
<input type="text" id="msg" style="width: 200px;">
</div>
<button id="submit">提交</button>
<script>
document.querySelector('#submit')
.addEventListener('click', function () {
var msg2 = msg.value
ws.send(msg2) // 核心代码，将表单里的数据提交给server端
msg.value = ''
}, false)
</script>
</body>
</html>2.3 WsClient.js
代码语言：javascript复制const ws = new WebSocket('ws://localhost:8081/')
ws.onopen = () => {
ws.send('大家好!')
}
ws.onmessage = (msg) => {
const content = document.getElementById('content')
content.innerHTML = msg.data '<br/>'
}
ws.onerror = (err) => {
console.log(err);
}
ws.onclose = () => {
console.log('closed~');
}三、基于 Socket.io 的 Socket 编程
3.1 SocketIoServer.js
代码语言：javascript复制var express = require('express');
var app = express();
var server = require('http').Server(app);
var io = require('socket.io')(server);
// app.use(express.static(__dirname '/client'))
io.on('connection', function (socket) {
// setInterval(function () {
// socket.emit('list', 'abc')
// }, 1000)
// socket.broadcast.emit('list', 'test');
// socket.on('backend', (msg) => {
// console.log(msg);
// })
socket.on('receive', (msg) => {
socket.broadcast.emit('message', msg);
})
});
server.listen(8082, '10.9.49.156');3.2 index.html
代码语言：html复制<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>socket.io</title>
<script src="socket.io.js" charset="utf-8"></script>
</head>
<body>
<h1>gp 交流区</h1>
<div id="content" name="name" style="overflow-y: scroll; width: 400px; height: 300px; border: solid 1px #000"></div>
<br />
<div>
<input type="text" id="msg" style="width: 200px;">
</div>
<button id="submit">提交</button>
<script>
var socket = io.connect('http://10.9.49.156:8082');
const content = document.getElementById('content')
document.querySelector('#submit')
.addEventListener('click', function () {
var msg2 = msg.value
socket.emit('receive', msg2) // 核心代码
msg.value = ''
content.innerHTML = msg2 '<br/>'
}, false)
socket.on('message', function(msg){
content.innerHTML = msg '<br/>'
})
</script>
</body>
</html>socket.io.js
代码语言：scss复制# 安装包
npm i socket.io
# 在 node_modules/socket.io-client/dist/ 找到 socket.io.js写在最后
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