Day12.js

// Problem: Express Rate Limiting

// Problem Statement: Implement a rate-limiting middleware for an Express application. The middleware should limit the number of requests from a single IP address to a specified rate, and return a 429 Too Many Requests status if the limit is exceeded.

// npm install express-rate-limit

const express = require('express');
const rateLimit = require('express-rate-limit');

const app = express();

// Applying rate limiting middleware
const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100, // limit each IP to 100 requests per windowMs
  message: 'Too many requests from this IP, please try again later.'
});
app.use(limiter);

app.get('/', (req, res) => {
  res.send('Hello, world!');
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server is running on port http://localhost:${PORT}`);
});