composer require davedevelopment/stiphle
Stiphle is a little library to try and provide an easy way of throttling/rate limit requests, for those without fancy hardware etc.
You create a throttle, and ask it how long you should wait. For example, given that $identifier is some means of identifying whatever it is you're throttling, and you want to throttle it to 5 requests per second:
<?php
$throttle = new Stiphle\Throttle\LeakyBucket;
$identifier = 'dave';
while(true) {
// the throttle method returns the amount of milliseconds it slept for
echo $throttle->throttle($identifier, 5, 1000);
}
# 0 0 0 0 0 200 200....Use combinations of values to provide bursting etc, though use carefully as it screws with your mind
<?php
$throttle = new Stiphle\Throttle\LeakyBucket;
$identifier = 'dave';
for(;;) {
/**
* Allow upto 5 per second, but limit to 20 a minute - I think
**/
echo "a:" . $throttle->throttle($identifier, 5, 1000);
echo " b:" . $throttle->throttle($identifier, 20, 60000);
echo "\n";
}
#a:0 b:0
#a:0 b:0
#a:0 b:0
#a:0 b:0
#a:0 b:0
#a:199 b:0
#a:200 b:0
#a:199 b:0
#a:200 b:0
#a:200 b:0
#a:199 b:0
#a:200 b:0
#a:199 b:0
#a:200 b:0
#a:200 b:0
#a:199 b:0
#a:200 b:0
#a:200 b:0
#a:199 b:0
#a:200 b:0
#a:199 b:0
#a:200 b:2600
#a:0 b:3000
#a:0 b:2999
There are currently two types of throttles, Leaky Bucket and a simple fixed time window.
/**
* Throttle to 1000 per *rolling* 24 hours, e.g. the counter will not reset at
* midnight
*/
$throttle = new Stiphle\Throttle\LeakyBucket;
$throttle->throttle('api.request', 1000, 86400000);
/**
* Throttle to 1000 per calendar day, counter will reset at midnight
*/
$throttle = new Stiphle\Throttle\TimeWindow;
$throttle->throttle('api.request', 1000, 86400000);NB: The current implementation of the TimeWindow throttle will only work on 64-bit architectures!
Stiphle currently ships with 5 storage engines
- In process
- APC
- Memcached
- Doctrine Cache
- Redis
Stiphle uses the in process storage by default. A different storage engine can be injected after object creation.
$throttle = new Stiphle\Throttle\LeakyBucket();
$storage = new \Stiphle\Storage\Memcached(new \Memcached());
$throttle->setStorage($storage);- More Tests!
- Decent Unit tests
- More throttling methods
- More storage adapters, the current ones are a little volatile, Mongo, Cassandra, MemcacheDB etc
Copyright (c) 2011 Dave Marshall. See LICENCE for further details
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