NoxlogicRateLimitBundle
This bundle provides enables the @RateLimit annotation which allows you to limit the number of connections to actions.
This is mostly useful in APIs.
The bundle is prepared to work by default in cooperation with the FOSOAuthServerBundle. It contains a listener that adds the OAuth token to the cache-key. However, you can create your own key generator to allow custom rate limiting based on the request. See Create a custom key generator below.
This bundle is partially inspired by a GitHub gist from Ruud Kamphuis: https://gist.github.com/ruudk/3350405
Features
- Simple usage through annotations
- Customize rates per controller, action and even per HTTP method
- Multiple storage backends: Redis, Memcached and Doctrine cache
Installation
Installation takes just few easy steps:
Step 1: Add the bundle to your composer.json
If you're not yet familiar with Composer see http://getcomposer.org. Add the NoxlogicRateLimitBundle in your composer.json:
{
"require": {
"noxlogic/ratelimit-bundle": "1.x"
}
}Now tell composer to download the bundle by running the command:
php composer.phar update noxlogic/ratelimit-bundleStep 2: Enable the bundle
Enable the bundle in the kernel:
<?php
// app/AppKernel.php
public function registerBundles()
{
$bundles = array(
// ...
new Noxlogic\RateLimitBundle\NoxlogicRateLimitBundle(),
);
}Step 3: Install a storage engine
Redis
If you want to use Redis as your storage engine, you might want to install SncRedisBundle:
Memcache
If you want to use Memcache, you might want to install LswMemcacheBundle
Doctrine cache
If you want to use Doctrine cache as your storage engine, you might want to install DoctrineCacheBundle:
Referer to their documentations for more details. You can change your storage engine with the storage_engine configuration parameter. See Configuration reference.
Configuration
Enable bundle only in production
If you wish to enable the bundle only in production environment (so you can test without worrying about limit in your development environments), you can use the enabled configuration setting to enable/disable the bundle completely. It's enabled by default:
# config_dev.yml
noxlogic_rate_limit:
enabled: falseConfiguration reference
This is the default bundle configuration:
noxlogic_rate_limit:
enabled: true
# The storage engine where all the rates will be stored
storage_engine: ~ # One of "redis"; "memcache"; "doctrine"; "php_redis"; "php_redis_cluster"
# The redis client to use for the redis storage engine
redis_client: default_client
# The Redis service, use this if you dont use SncRedisBundle and want to specify a service to use
# Should be instance of \Predis\Client
redis_service: null # Example: project.predis
# The Redis client to use for the php_redis storage engine
# Depending on storage_engine an instance of \Redis or \RedisCluster
php_redis_service: null # Example: project.redis
# The memcache client to use for the memcache storage engine
memcache_client: default
# The Memcached service, use this if you dont use LswMemcacheBundle and want to specify a service to use
# Should be instance of \Memcached
memcache_service: null # Example: project.memcached
# The Doctrine Cache provider to use for the doctrine storage engine
doctrine_provider: null # Example: my_apc_cache
# The Doctrine Cache service, use this if you dont use DoctrineCacheBundle and want to specify a service to use
# Should be an instance of \Doctrine\Common\Cache\Cache
doctrine_service: null # Example: project.my_apc_cache
# The HTTP status code to return when a client hits the rate limit
rate_response_code: 429
# Optional exception class that will be returned when a client hits the rate limit
rate_response_exception: null
# The HTTP message to return when a client hits the rate limit
rate_response_message: 'You exceeded the rate limit'
# Should the ratelimit headers be automatically added to the response?
display_headers: true
# What are the different header names to add
headers:
limit: X-RateLimit-Limit
remaining: X-RateLimit-Remaining
reset: X-RateLimit-Reset
# Rate limits for paths
path_limits:
path: ~ # Required
methods:
# Default:
- *
limit: ~ # Required
period: ~ # Required
# - { path: /api, limit: 1000, period: 3600 }
# - { path: /dashboard, limit: 100, period: 3600, methods: ['GET', 'POST']}
# Should the FOS OAuthServerBundle listener be enabled
fos_oauth_key_listener: trueUsage
Simple rate limiting
To enable rate limiting, you only need to add the annotation to the docblock of the specified action
<?php
use Noxlogic\RateLimitBundle\Annotation\RateLimit;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
/**
* @Route(...)
*
* @RateLimit(limit=1000, period=3600)
*/
public function someApiAction()
{
}Limit per method
It's possible to rate-limit specific HTTP methods as well. This can be either a string or an array of methods. When no method argument is given, all other methods not defined are rated. This allows to add a default rate limit if needed.
<?php
use Noxlogic\RateLimitBundle\Annotation\RateLimit;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
/**
* @Route(...)
*
* @RateLimit(methods={"PUT", "POST"}, limit=1000, period=3600)
* @RateLimit(methods={"GET"}, limit=1000, period=3600)
* @RateLimit(limit=5000, period=3600)
*/
public function someApiAction()
{
}Limit per controller
It's also possible to add rate-limits to a controller class instead of a single action. This will act as a default rate limit for all actions, except the ones that actually defines a custom rate-limit.
<?php
use Noxlogic\RateLimitBundle\Annotation\RateLimit;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
/**
* @Ratelimit(methods={"POST"}, limit=100, period=10); // 100 POST requests per 10 seconds
*/
class DefaultController extends Controller
{
/**
* @Ratelimit(method="POST", limit=200, period=10); // 200 POST requests to indexAction allowed.
*/
public function indexAction()
{
}
}Create a custom key generator
NOTE
Note that this bundle by default does not perform rate-limiting based on user's IP. If you wish to enable IP-based rate limiting or any other strategy, custom key generators are the way to go.
If you need to create a custom key generator, you need to register a listener to listen to the ratelimit.generate.key event:
services:
mybundle.listener.rate_limit_generate_key:
class: MyBundle\Listener\RateLimitGenerateKeyListener
tags:
- { name: kernel.event_listener, event: 'ratelimit.generate.key', method: 'onGenerateKey' }<?php
namespace MyBundle\Listener;
use Noxlogic\RateLimitBundle\Events\GenerateKeyEvent;
class RateLimitGenerateKeyListener
{
public function onGenerateKey(GenerateKeyEvent $event)
{
$key = $this->generateKey();
$event->addToKey($key);
// $event->setKey($key); // to overwrite key completely
}
}Make sure to generate a key based on what is rate limited in your controllers.
And example of a IP-based key generator can be:
<?php
namespace MyBundle\Listener;
use Noxlogic\RateLimitBundle\Events\GenerateKeyEvent;
class IpBasedRateLimitGenerateKeyListener
{
public function onGenerateKey(GenerateKeyEvent $event)
{
$request = $event->getRequest();
$event->addToKey($request->getClientIp());
}
}Throwing exceptions
Instead of returning a Response object when a rate limit has exceeded, it's also possible to throw an exception. This
allows you to easily handle the rate limit on another level, for instance by capturing the kernel.exception event.
Running tests
If you want to run the tests use:
./vendor/bin/phpunit ./Tests