rate-limiter

Rate limit for Node.js, with ioredis client

Installation

npm install @aftership/rate-limiter

Dependency

The client must be an instance of ioredis library.

Examples

var Limiter = require('@aftership/rate-limiter');
var redis = require('ioredis');

var redis_client = redis.createClient({
	host: 'localhost',
	port: 6379,
	db: 0
});

redis_client.on('connect', function(err) {
	if (err) {
		console.log(err);
	} else {
		// limit to 2 request per every 10s
		var limiter = new Limiter({
			redis_client: redis_client,
			key: 'the-user-api-key',
			limit: 2, // default is 10
			duration: 10 // default is 60s
		});

		limiter.get(function(err, result) {
			if (err) {
				console.log(err);
			} else {
				console.log(result);

				// { limit: 2, remaining: 1, reset: 10 }
				if (result.remaining >= 0) {
					console.log('I can do the request!');
				} else {
					console.log('I run out of limit! Try again after ' + result.reset + ' second.');
				}
			}
		});
	}
});

Test

npm test

Change log

Please refer to CHANGELOG.md

License

Copyright (c) 2016 AfterShip

Licensed under the MIT license.