JEMBOT MAWOT Bypass Shell
<?php
/**
* @package Joomla.Platform
* @subpackage Cache
*
* @copyright Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Memcache cache storage handler
*
* @see https://secure.php.net/manual/en/book.memcache.php
* @since 11.1
*/
class JCacheStorageMemcache extends JCacheStorage
{
/**
* Memcache connection object
*
* @var Memcache
* @since 11.1
*/
protected static $_db = null;
/**
* Payload compression level
*
* @var integer
* @since 11.1
*/
protected $_compress = 0;
/**
* Constructor
*
* @param array $options Optional parameters.
*
* @since 11.1
*/
public function __construct($options = array())
{
parent::__construct($options);
$this->_compress = JFactory::getConfig()->get('memcache_compress', false) ? MEMCACHE_COMPRESSED : 0;
if (static::$_db === null)
{
$this->getConnection();
}
}
/**
* Create the Memcache connection
*
* @return void
*
* @since 11.1
* @throws RuntimeException
*/
protected function getConnection()
{
if (!static::isSupported())
{
throw new RuntimeException('Memcache Extension is not available');
}
$config = JFactory::getConfig();
$host = $config->get('memcache_server_host', 'localhost');
$port = $config->get('memcache_server_port', 11211);
// Create the memcache connection
static::$_db = new Memcache;
if ($config->get('memcache_persist', true))
{
$result = @static::$_db->pconnect($host, $port);
}
else
{
$result = @static::$_db->connect($host, $port);
}
if (!$result)
{
// Null out the connection to inform the constructor it will need to attempt to connect if this class is instantiated again
static::$_db = null;
throw new JCacheExceptionConnecting('Could not connect to memcache server');
}
}
/**
* Get a cache_id string from an id/group pair
*
* @param string $id The cache data id
* @param string $group The cache data group
*
* @return string The cache_id string
*
* @since 11.1
*/
protected function _getCacheId($id, $group)
{
$prefix = JCache::getPlatformPrefix();
$length = strlen($prefix);
$cache_id = parent::_getCacheId($id, $group);
if ($length)
{
// Memcache use suffix instead of prefix
$cache_id = substr($cache_id, $length) . strrev($prefix);
}
return $cache_id;
}
/**
* Get cached data by ID and group
*
* @param string $id The cache data ID
* @param string $group The cache data group
* @param boolean $checkTime True to verify cache time expiration threshold
*
* @return mixed Boolean false on failure or a cached data object
*
* @since 11.1
*/
public function get($id, $group, $checkTime = true)
{
return static::$_db->get($this->_getCacheId($id, $group));
}
/**
* Get all cached data
*
* @return mixed Boolean false on failure or a cached data object
*
* @since 11.1
*/
public function getAll()
{
$keys = static::$_db->get($this->_hash . '-index');
$secret = $this->_hash;
$data = array();
if (is_array($keys))
{
foreach ($keys as $key)
{
if (empty($key))
{
continue;
}
$namearr = explode('-', $key->name);
if ($namearr !== false && $namearr[0] == $secret && $namearr[1] == 'cache')
{
$group = $namearr[2];
if (!isset($data[$group]))
{
$item = new JCacheStorageHelper($group);
}
else
{
$item = $data[$group];
}
$item->updateSize($key->size / 1024);
$data[$group] = $item;
}
}
}
return $data;
}
/**
* Store the data to cache by ID and group
*
* @param string $id The cache data ID
* @param string $group The cache data group
* @param string $data The data to store in cache
*
* @return boolean
*
* @since 11.1
*/
public function store($id, $group, $data)
{
$cache_id = $this->_getCacheId($id, $group);
if (!$this->lockindex())
{
return false;
}
$index = static::$_db->get($this->_hash . '-index');
if (!is_array($index))
{
$index = array();
}
$tmparr = new stdClass;
$tmparr->name = $cache_id;
$tmparr->size = strlen($data);
$index[] = $tmparr;
static::$_db->set($this->_hash . '-index', $index, 0, 0);
$this->unlockindex();
static::$_db->set($cache_id, $data, $this->_compress, $this->_lifetime);
return true;
}
/**
* Remove a cached data entry by ID and group
*
* @param string $id The cache data ID
* @param string $group The cache data group
*
* @return boolean
*
* @since 11.1
*/
public function remove($id, $group)
{
$cache_id = $this->_getCacheId($id, $group);
if (!$this->lockindex())
{
return false;
}
$index = static::$_db->get($this->_hash . '-index');
if (is_array($index))
{
foreach ($index as $key => $value)
{
if ($value->name == $cache_id)
{
unset($index[$key]);
static::$_db->set($this->_hash . '-index', $index, 0, 0);
break;
}
}
}
$this->unlockindex();
return static::$_db->delete($cache_id);
}
/**
* Clean cache for a group given a mode.
*
* group mode : cleans all cache in the group
* notgroup mode : cleans all cache not in the group
*
* @param string $group The cache data group
* @param string $mode The mode for cleaning cache [group|notgroup]
*
* @return boolean
*
* @since 11.1
*/
public function clean($group, $mode = null)
{
if (!$this->lockindex())
{
return false;
}
$index = static::$_db->get($this->_hash . '-index');
if (is_array($index))
{
$prefix = $this->_hash . '-cache-' . $group . '-';
foreach ($index as $key => $value)
{
if (strpos($value->name, $prefix) === 0 xor $mode != 'group')
{
static::$_db->delete($value->name);
unset($index[$key]);
}
}
static::$_db->set($this->_hash . '-index', $index, 0, 0);
}
$this->unlockindex();
return true;
}
/**
* Flush all existing items in storage.
*
* @return boolean
*
* @since 3.6.3
*/
public function flush()
{
if (!$this->lockindex())
{
return false;
}
return static::$_db->flush();
}
/**
* Test to see if the storage handler is available.
*
* @return boolean
*
* @since 12.1
*/
public static function isSupported()
{
return extension_loaded('memcache') && class_exists('Memcache');
}
/**
* Lock cached item
*
* @param string $id The cache data ID
* @param string $group The cache data group
* @param integer $locktime Cached item max lock time
*
* @return mixed Boolean false if locking failed or an object containing properties lock and locklooped
*
* @since 11.1
*/
public function lock($id, $group, $locktime)
{
$returning = new stdClass;
$returning->locklooped = false;
$looptime = $locktime * 10;
$cache_id = $this->_getCacheId($id, $group);
$data_lock = static::$_db->add($cache_id . '_lock', 1, 0, $locktime);
if ($data_lock === false)
{
$lock_counter = 0;
// Loop until you find that the lock has been released.
// That implies that data get from other thread has finished.
while ($data_lock === false)
{
if ($lock_counter > $looptime)
{
break;
}
usleep(100);
$data_lock = static::$_db->add($cache_id . '_lock', 1, 0, $locktime);
$lock_counter++;
}
$returning->locklooped = true;
}
$returning->locked = $data_lock;
return $returning;
}
/**
* Unlock cached item
*
* @param string $id The cache data ID
* @param string $group The cache data group
*
* @return boolean
*
* @since 11.1
*/
public function unlock($id, $group = null)
{
$cache_id = $this->_getCacheId($id, $group) . '_lock';
return static::$_db->delete($cache_id);
}
/**
* Lock cache index
*
* @return boolean
*
* @since 11.1
*/
protected function lockindex()
{
$looptime = 300;
$data_lock = static::$_db->add($this->_hash . '-index_lock', 1, 0, 30);
if ($data_lock === false)
{
$lock_counter = 0;
// Loop until you find that the lock has been released. that implies that data get from other thread has finished
while ($data_lock === false)
{
if ($lock_counter > $looptime)
{
return false;
}
usleep(100);
$data_lock = static::$_db->add($this->_hash . '-index_lock', 1, 0, 30);
$lock_counter++;
}
}
return true;
}
/**
* Unlock cache index
*
* @return boolean
*
* @since 11.1
*/
protected function unlockindex()
{
return static::$_db->delete($this->_hash . '-index_lock');
}
}
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