rateLimit.js

const express = require('express');
const redis = require('redis');

const app = express();
const client = redis.createClient();

app.get('/api/endpoint', (req, res) => {
  const ipAddress = req.ip;
  
  client.incr(ipAddress, (err, requestCount) => {
    if (err) {
      console.error('Error:', err);
      return res.status(500).json({ message: 'Internal Server Error' });
    }
    
    if (requestCount > 10) {
      return res.status(429).json({ message: 'Rate limit exceeded. Please try again later.' });
    }
    
    // Your logic for the protected endpoint goes here
    
    res.json({ message: 'Success!' });
  });
});

app.listen(3000, () => {
  console.log('Server started on port 3000');
});