digi-rate-limiter/index.js

Custom rate limiting middleware for Node.js

const RateLimiter = require('./lib/rateLimiter');

const rateLimiterMiddleware = (options) => {
  const limiter = new RateLimiter(options);

  return (req, res, next) => {
    const clientId = req.ip;
    const result = limiter.handleRequest(clientId);

    if (!result.allowed) {
      return res.status(429).json({
        message: 'Too many requests. Please try again later.',
        retryAfter: result.remainingTime / 1000,
      });
    }

    next();
  };
};

module.exports = rateLimiterMiddleware;