Node.js — HTTP

Basic HTTP Server

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 on port 3000');
});

Handling Routes

const server = http.createServer((req, res) => {
    if (req.url === '/' && req.method === 'GET') {
        res.writeHead(200, { 'Content-Type': 'text/html' });
        res.end('<h1>Home Page</h1>');
    } else if (req.url === '/api' && req.method === 'GET') {
        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ message: 'API response' }));
    } else {
        res.writeHead(404);
        res.end('Not Found');
    }
});

HTTP Methods

const server = http.createServer((req, res) => {
    switch (req.method) {
        case 'GET':    // Read
        case 'POST':   // Create
        case 'PUT':    // Update
        case 'DELETE': // Delete
    }
});

Reading Request Body

let body = '';
req.on('data', chunk => {
    body += chunk.toString();
});
req.on('end', () => {
    const data = JSON.parse(body);
    res.end('Received');
});

HTTPS Server

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

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

https.createServer(options, handler).listen(443);

Mini Practice

1. Create a basic HTTP server
2. Handle different routes
3. Read request body
4. Set response headers

Up Next

Continue with HTTPS — secure HTTP servers.