94 lines
2.1 KiB
PHP
94 lines
2.1 KiB
PHP
<?php
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/**
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* PrivateBin
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*
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* a zero-knowledge paste bin
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*
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* @link https://github.com/PrivateBin/PrivateBin
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
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* @version 1.0
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*/
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namespace PrivateBin\Persistence;
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use PrivateBin\Configuration;
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/**
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* PurgeLimiter
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*
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* Handles purge limiting, so purging is not triggered too frequently.
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*/
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class PurgeLimiter extends AbstractPersistence
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{
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/**
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* time limit in seconds, defaults to 300s
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*
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* @access private
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* @static
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* @var int
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*/
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private static $_limit = 300;
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/**
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* set the time limit in seconds
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*
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* @access public
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* @static
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* @param int $limit
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* @return void
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*/
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public static function setLimit($limit)
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{
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self::$_limit = $limit;
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}
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/**
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* set configuration options of the traffic limiter
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*
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* @access public
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* @static
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* @param Configuration $conf
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* @return void
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*/
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public static function setConfiguration(Configuration $conf)
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{
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self::setLimit($conf->getKey('limit', 'purge'));
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self::setPath($conf->getKey('dir', 'purge'));
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}
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/**
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* check if the purge can be performed
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*
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* @access public
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* @static
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* @throws Exception
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* @return bool
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*/
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public static function canPurge()
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{
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// disable limits if set to less then 1
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if (self::$_limit < 1) {
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return true;
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}
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$file = 'purge_limiter.php';
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$now = time();
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$content = '<?php' . PHP_EOL . '$GLOBALS[\'purge_limiter\'] = ' . $now . ';' . PHP_EOL;
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if (!self::_exists($file)) {
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self::_store($file, $content);
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}
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$path = self::getPath($file);
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require $path;
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$pl = $GLOBALS['purge_limiter'];
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if ($pl + self::$_limit >= $now) {
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$result = false;
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} else {
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$result = true;
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self::_store($file, $content);
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}
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return $result;
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}
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}
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