Linux環境下Node.js如何進行網絡編程

在Linux環境下，使用Node.js進行網絡編程主要依賴于內置的http、https、net、dgram等模塊。以下是一些基本的網絡編程示例：

1. 創建一個簡單的HTTP服務器（使用http模塊）：

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. 創建一個簡單的HTTPS服務器（使用https模塊）：

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. 創建一個TCP客戶端（使用net模塊）：

const net = require('net');

const client = new net.Socket();

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

client.on('data', (data) => {
  console.log(`Received data: ${data}`);
  client.destroy(); // close the connection when data is received
});

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

4. 創建一個UDP客戶端（使用dgram模塊）：

const dgram = require('dgram');

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

client.open(3003);

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

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

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

這些示例展示了如何在Linux環境下使用Node.js進行基本的網絡編程。你可以根據自己的需求選擇合適的模塊和方法進行開發。