Throttle (v0.3.3)

Ban identifier after certain amount of requests in a given timeframe.

Installing via Composer (recommended)

Install composer in your project:

curl -s http://getcomposer.org/installer | php

Create a composer.json file in your project root:

{
    "require": {
        "websoftwares/throttle": "dev-master"
    }
}

Install via composer

php composer.phar install

Usage

Basic usage of the Throttle class to ban an identifier.

use Websoftwares\Throttle, Websoftwares\Storage\Memcached, Monolog\Logger;

// Ip
$identifier = '$_SERVER["REMOTE_ADDR"]';
// Instantiate class
$throttle = new Throttle(new Logger('throttle'), new Memcached());

if($throttle->validate($identifier)) {
	// Success proceed
} else {
	// Banned
}

Logger

Any logger library that implements the PSR-3 LoggerInterface should work, just create your Logger object and inject it into the Throttle constructor. For example the excellent logging library Monolog.

Storage

Included is a Memcached example however it is very easy to use some other storage system just implement the StorageInterface and inject that object into the Throttle constructor.

####Caution#### Whatever storage system u decide to use, don not store the failed request data into your database, this could lead to a DDOS attack and take your database down.

Options

U can override the default options by instantiating a Throttle class and pass in an array as the third argument.

$options = array(
	'banned' => 10, // Ban identifier after 10 attempts. (default 5)
	'logged' => 20, // Log identifier after 20 attempts. (default 10)
	'timespan' => 60 // The timespan for the duration of the ban. (default 86400)
	);

// Instantiate class
$throttle = new Throttle(new Logger('throttle'), new Memcached(), $options);

reset();

This will remove the identifier from the storage.

$throttle->reset($identifier);

remaining();

This will return an integer that is the remaining attempt(s) available before identifier gets banned.

$throttle->remaining($identifier);

Memcached

This requires u have the PHP memcached extension installed.

on Debian/Ubuntu systems for example install like this (requires administrative password).

sudo apt-get install php5-memcached

Testing

In the tests folder u can find several tests.

License

DBAD Public License.

Acknowledgement

Converted from python example and comments from Forrst.com post.