A rate limiter middleware for Guzzle

A rate limiter middleware for Guzzle. Here's what you need to know:

• Specify a maximum amount of requests per minute or per second
• When the limit is reached, the process will sleep until the request can be made
• Implement your own driver to persist the rate limiter's request store. This is necessary if the rate limiter needs to work across separate processes, the package ships with an InMemoryStore.

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Installation

You can install the package via composer:

composer require spatie/guzzle-rate-limiter-middleware

Usage

Create a Guzzle middleware stack and register it on the client.

use GuzzleHttp\Client;
use GuzzleHttp\HandlerStack;
use Spatie\GuzzleRateLimiterMiddleware\RateLimiterMiddleware;

$stack = HandlerStack::create();
$stack->push(RateLimiterMiddleware::perSecond(3));

$client = new Client([
    'handler' => $stack,
]);

You can create a rate limiter to limit per second or per minute.

RateLimiterMiddleware::perSecond(3); // Max. 3 requests per second

RateLimiterMiddleware::perMinute(5); // Max. 5 requests per minute

Custom stores

By default, the rate limiter works in memory. This means that if you have a second PHP process (or Guzzle client) consuming the same API, you'd still possibly hit the rate limit. To work around this issue, the rate limiter's state should be persisted to a cache. Implement the Store interface with your own cache, and pass the store to the rate limiter.

use MyApp\RateLimiterStore;
use Spatie\GuzzleRateLimiterMiddleware\RateLimit;

RateLimiterMiddleware::perSecond(3, new RateLimiterStore());

A Laravel example of a custom Store:

<?php

namespace MyApp;

use Spatie\GuzzleRateLimiterMiddleware\Store;
use Illuminate\Support\Facades\Cache;

class RateLimiterStore implements Store
{
    public function get(): array
    {
        return Cache::get('rate-limiter', []);
    }

    public function push(int $timestamp, int $limit)
    {
        Cache::put('rate-limiter', array_merge($this->get(), [$timestamp]));
    }
}

Testing

composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security

If you've found a bug regarding security please mail security@spatie.be instead of using the issue tracker.

Postcardware

You're free to use this package, but if it makes it to your production environment we highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using.

Our address is: Spatie, Kruikstraat 22, 2018 Antwerp, Belgium.

We publish all received postcards on our company website.

Credits

• Sebastian De Deyne
• All Contributors

License

The MIT License (MIT). Please see License File for more information.