Rate Limiting in Node with Express

Rate Limiting is Most Common Practice to Limit The Incoming Request of API's 

Rate Limit in Node.js - Education Funda

Let's see how we can achieve it easily in Node with Express framework:

• You need to install rate limit package via ~$ npm i express-rate-limit.

import * as RateLimit from 'express-rate-limit';

const env = process.env.NODE_ENV || 'dev';

const rateLimitRequest = Number(process.env.RATE_LIMIT_TIME) || 15;

const rateLimitTime = Number(process.env.RATE_LIMIT_REQUEST) || 100;

export default () => {

if (env === 'production') {

return new RateLimit({

windowMs: rateLimitTime * 60 * 1000, // 15 minutes

max: rateLimitRequest, // limit each IP to 30 requests per windowMs

delayMs: 0,

handler: 'Rate limt exceeded, please try again later some time.',

});

}

return new RateLimit({

windowMs: 5 * 60 * 1000, // 5 minutes

max: 3000, // limit each IP to 3000 requests per windowMs

delayMs: 0,

handler: 'Rate limit exceeded, please try again later some time.',

});

};

Now in our Routes or Validation index file we can simply add it to all routes or if we want then we can add it in single route as well:

import rateLimiter from './middleware/rateLimit';

app.use(rateLimiter()); // apply to all requests

That's it!

<> Happy Coding </>