mirror of
https://github.com/alextselegidis/easyappointments.git
synced 2024-12-22 22:52:35 +03:00
85 lines
2.6 KiB
PHP
85 lines
2.6 KiB
PHP
|
<?php defined('BASEPATH') or exit('No direct script access allowed');
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------------------------
|
||
|
|
* Easy!Appointments - Open Source Web Scheduler
|
||
|
|
*
|
||
|
|
* @package EasyAppointments
|
||
|
|
* @author A.Tselegidis <alextselegidis@gmail.com>
|
||
|
|
* @copyright Copyright (c) 2013 - 2020, Alex Tselegidis
|
||
|
|
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
|
||
|
|
* @link http://easyappointments.org
|
||
|
|
* @since v1.1.0
|
||
|
|
* ---------------------------------------------------------------------------- */
|
||
|
|
|
||
|
|
if ( ! function_exists('rate_limit'))
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* Rate-limit the application requests.
|
||
|
|
*
|
||
|
|
* Example:
|
||
|
|
*
|
||
|
|
* rate_limit($CI->input->ip_address(), 100, 300);
|
||
|
|
*
|
||
|
|
* @link https://github.com/alexandrugaidei-atomate/ratelimit-codeigniter-filebased
|
||
|
|
*
|
||
|
|
* @param string $ip Client IP address.
|
||
|
|
* @param int $max_requests Number of allowed requests, defaults to 100.
|
||
|
|
* @param int $duration In seconds, defaults to 5 minutes.
|
||
|
|
*/
|
||
|
|
function rate_limit($ip, $max_requests = 100, $duration = 300)
|
||
|
|
{
|
||
|
|
$CI =& get_instance();
|
||
|
|
|
||
|
|
$rate_limiting = $CI->config->item('rate_limiting');
|
||
|
|
|
||
|
|
if ( ! $rate_limiting)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$CI->load->driver('cache', ['adapter' => 'file']);
|
||
|
|
|
||
|
|
$cache_key = str_replace(':', '', 'rate_limit_key_' . $ip);
|
||
|
|
|
||
|
|
$cache_remain_time_key = str_replace(':', '', 'rate_limit_tmp_' . $ip);
|
||
|
|
|
||
|
|
$current_time = date('Y-m-d H:i:s');
|
||
|
|
|
||
|
|
if ($CI->cache->get($cache_key) === FALSE) // First request
|
||
|
|
{
|
||
|
|
$current_time_plus = date('Y-m-d H:i:s', strtotime('+' . $duration . ' seconds'));
|
||
|
|
|
||
|
|
$CI->cache->save($cache_key, 1, $duration);
|
||
|
|
|
||
|
|
$CI->cache->save($cache_remain_time_key, $current_time_plus, $duration * 2);
|
||
|
|
}
|
||
|
|
else // Consequent request
|
||
|
|
{
|
||
|
|
$requests = $CI->cache->get($cache_key);
|
||
|
|
|
||
|
|
$time_lost = $CI->cache->get($cache_remain_time_key);
|
||
|
|
|
||
|
|
if ($current_time > $time_lost)
|
||
|
|
{
|
||
|
|
$current_time_plus = date('Y-m-d H:i:s', strtotime('+' . $duration . ' seconds'));
|
||
|
|
|
||
|
|
$CI->cache->save($cache_key, 1, $duration);
|
||
|
|
|
||
|
|
$CI->cache->save($cache_remain_time_key, $current_time_plus, $duration * 2);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$CI->cache->save($cache_key, $requests + 1, $duration);
|
||
|
|
}
|
||
|
|
|
||
|
|
$requests = $CI->cache->get($cache_key);
|
||
|
|
|
||
|
|
if ($requests > $max_requests)
|
||
|
|
{
|
||
|
|
header('HTTP/1.0 429 Too Many Requests');
|
||
|
|
exit;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|