Linux Node.js如何进行网络编程

在Linux环境下使用Node.js进行网络编程，主要依赖于内置的http、https、net、dgram等模块。以下是一些基本的网络编程示例：

1. 创建一个简单的HTTP服务器（使用http模块）：

const http = require('http');

const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World\n');
});

server.listen(3000, () => {
  console.log('Server running at http://localhost:3000/');
});

2. 创建一个简单的HTTPS服务器（使用https模块）：

const https = require('https');
const fs = require('fs');

const options = {
  key: fs.readFileSync('your-private-key.pem'),
  cert: fs.readFileSync('your-certificate.pem')
};

const server = https.createServer(options, (req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World\n');
});

server.listen(3001, () => {
  console.log('Server running at https://localhost:3001/');
});

3. 创建一个TCP客户端（使用net模块）：

const net = require('net');

const client = new net.Socket();

client.connect(3002, 'localhost', () => {
  console.log('Connected to server');
  client.write('Hello Server!');
});

client.on('data', (data) => {
  console.log(`Received data: ${data}`);
  client.destroy(); // 关闭连接
});

client.on('close', () => {
  console.log('Connection closed');
});

4. 创建一个UDP服务器（使用dgram模块）：

const dgram = require('dgram');

const server = dgram.createSocket('udp4');

server.on('listening', () => {
  const address = server.address();
  console.log(`Server listening ${address.address}:${address.port}`);
});

server.on('message', (msg, rinfo) => {
  console.log(`Server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
});

server.bind(3003);

5. 创建一个UDP客户端（使用dgram模块）：

const dgram = require('dgram');

const client = dgram.createSocket('udp4');

const message = Buffer.from('Hello Server!');

client.send(message, 3003, 'localhost', (err) => {
  if (err) throw err;
  console.log('Message sent!');
});

client.on('listening', () => {
  const address = client.address();
  console.log(`Client listening ${address.address}:${address.port}`);
});

client.on('message', (msg, rinfo) => {
  console.log(`Client received: ${msg} from ${rinfo.address}:${rinfo.port}`);
});

这些示例展示了如何在Linux环境下使用Node.js进行基本的网络编程。你可以根据自己的需求选择合适的模块和方法进行开发。