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File Name : memcached.php

<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Cache
 *
 * @copyright   Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * Memcached cache storage handler
 *
 * @package     Joomla.Platform
 * @subpackage  Cache
 * @see         http://php.net/manual/en/book.memcached.php
 * @since       12.1
 */
class JCacheStorageMemcached extends JCacheStorage
{
	/**
	 * Memcached connection object
	 *
	 * @var    Memcached
	 * @since  12.1
	 */
	protected static $_db = null;

/**
	 * Persistent session flag
	 *
	 * @var    boolean
	 * @since  12.1
	 */
	protected $_persistent = false;

/**
	 * Payload compression level
	 *
	 * @var    integer
	 * @since  12.1
	 */
	protected $_compress = 0;

/**
	 * Constructor
	 *
	 * @param   array  $options  Optional parameters.
	 *
	 * @since   12.1
	 */
	public function __construct($options = array())
	{
		parent::__construct($options);
		if (self::$_db === null)
		{
			$this->getConnection();
		}
	}

/**
	 * Return memcached connection object
	 *
	 * @return  object   memcached connection object
	 *
	 * @since   12.1
	 * @throws  RuntimeException
	 */
	protected function getConnection()
	{
		if ((extension_loaded('memcached') && class_exists('Memcached')) != true)
		{
			return false;
		}

$config = JFactory::getConfig();
		$this->_persistent = $config->get('memcached_persist', true);
		$this->_compress = $config->get('memcached_compress', false) == false ? 0 : Memcached::OPT_COMPRESSION;

/*
		 * This will be an array of loveliness
		 * @todo: multiple servers
		 * $servers	= (isset($params['servers'])) ? $params['servers'] : array();
		 */
		$server = array();
		$server['host'] = $config->get('memcached_server_host', 'localhost');
		$server['port'] = $config->get('memcached_server_port', 11211);

// Create the memcache connection
		if ($this->_persistent)
		{
			$session = JFactory::getSession();
			self::$_db = new Memcached($session->getId());
		}
		else
		{
			self::$_db = new Memcached;
		}
		$memcachedtest = self::$_db->addServer($server['host'], $server['port']);

if ($memcachedtest == false)
		{
			throw new RuntimeException('Could not connect to memcached server', 404);
		}

self::$_db->setOption(Memcached::OPT_COMPRESSION, $this->_compress);

// Memcached has no list keys, we do our own accounting, initialise key index
		if (self::$_db->get($this->_hash . '-index') === false)
		{
			$empty = array();
			self::$_db->set($this->_hash . '-index', $empty, 0);
		}

return;
	}

/**
	 * Get cached data from memcached by id and group
	 *
	 * @param   string   $id         The cache data id
	 * @param   string   $group      The cache data group
	 * @param   boolean  $checkTime  True to verify cache time expiration threshold
	 *
	 * @return  mixed  Boolean false on failure or a cached data string
	 *
	 * @since   12.1
	 */
	public function get($id, $group, $checkTime = true)
	{
		$cache_id = $this->_getCacheId($id, $group);
		$back = self::$_db->get($cache_id);
		return $back;
	}

/**
	 * Get all cached data
	 *
	 * @return  array    data
	 *
	 * @since   12.1
	 */
	public function getAll()
	{
		parent::getAll();

$keys = self::$_db->get($this->_hash . '-index');
		$secret = $this->_hash;

$data = array();

if (!empty($keys) && is_array($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 memcached by id and group
	 *
	 * @param   string  $id     The cache data id
	 * @param   string  $group  The cache data group
	 * @param   string  $data   The data to store in cache
	 *
	 * @return  boolean  True on success, false otherwise
	 *
	 * @since   12.1
	 */
	public function store($id, $group, $data)
	{
		$cache_id = $this->_getCacheId($id, $group);

if (!$this->lockindex())
		{
			return false;
		}

$index = self::$_db->get($this->_hash . '-index');
		if ($index === false)
		{
			$index = array();
		}

$tmparr = new stdClass;
		$tmparr->name = $cache_id;
		$tmparr->size = strlen($data);
		$index[] = $tmparr;
		self::$_db->replace($this->_hash . '-index', $index, 0);
		$this->unlockindex();

// Prevent double writes, write only if it doesn't exist else replace
		if (!self::$_db->replace($cache_id, $data, $this->_lifetime))
		{
			self::$_db->set($cache_id, $data, $this->_lifetime);
		}

return true;
	}

/**
	 * Remove a cached data entry by id and group
	 *
	 * @param   string  $id     The cache data id
	 * @param   string  $group  The cache data group
	 *
	 * @return  boolean  True on success, false otherwise
	 *
	 * @since   12.1
	 */
	public function remove($id, $group)
	{
		$cache_id = $this->_getCacheId($id, $group);

if (!$this->lockindex())
		{
			return false;
		}

$index = self::$_db->get($this->_hash . '-index');
		if ($index === false)
		{
			$index = array();
		}

foreach ($index as $key => $value)
		{
			if ($value->name == $cache_id)
			{
				unset($index[$key]);
			}
			break;
		}
		self::$_db->replace($this->_hash . '-index', $index, 0);
		$this->unlockindex();

return self::$_db->delete($cache_id);
	}

/**
	 * Clean cache for a group given a mode.
	 *
	 * @param   string  $group  The cache data group
	 * @param   string  $mode   The mode for cleaning cache [group|notgroup]
	 * group mode    : cleans all cache in the group
	 * notgroup mode : cleans all cache not in the group
	 *
	 * @return  boolean  True on success, false otherwise
	 *
	 * @since   12.1
	 */
	public function clean($group, $mode = null)
	{
		if (!$this->lockindex())
		{
			return false;
		}

$index = self::$_db->get($this->_hash . '-index');
		if ($index === false)
		{
			$index = array();
		}

$secret = $this->_hash;
		foreach ($index as $key => $value)
		{

if (strpos($value->name, $secret . '-cache-' . $group . '-') === 0 xor $mode != 'group')
			{
				self::$_db->delete($value->name, 0);
				unset($index[$key]);
			}
		}
		self::$_db->replace($this->_hash . '-index', $index, 0);
		$this->unlockindex();
		return true;
	}

/**
	 * Test to see if the cache storage is available.
	 *
	 * @return  boolean  True on success, false otherwise.
	 *
	 * @since   12.1
	 */
	public static function isSupported()
	{
		if ((extension_loaded('memcached') && class_exists('Memcached')) != true)
		{
			return false;
		}

$config = JFactory::getConfig();
		$host = $config->get('memcached_server_host', 'localhost');
		$port = $config->get('memcached_server_port', 11211);

$memcached = new Memcached;
		$memcachedtest = @$memcached->addServer($host, $port);

if (!$memcachedtest)
		{
			return false;
		}
		else
		{
			return true;
		}
	}

/**
	 * Lock cached item - override parent as this is more efficient
	 *
	 * @param   string   $id        The cache data id
	 * @param   string   $group     The cache data group
	 * @param   integer  $locktime  Cached item max lock time
	 *
	 * @return  boolean  True on success, false otherwise.
	 *
	 * @since   12.1
	 */
	public function lock($id, $group, $locktime)
	{
		$returning = new stdClass;
		$returning->locklooped = false;

$looptime = $locktime * 10;

$cache_id = $this->_getCacheId($id, $group);

if (!$this->lockindex())
		{
			return false;
		}

$index = self::$_db->get($this->_hash . '-index');
		if ($index === false)
		{
			$index = array();
		}

$tmparr = new stdClass;
		$tmparr->name = $cache_id;
		$tmparr->size = 1;

$index[] = $tmparr;
		self::$_db->replace($this->_hash . '-index', $index, 0);

$this->unlockindex();

$data_lock = self::$_db->add($cache_id . '_lock', 1, $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)
				{
					$returning->locked = false;
					$returning->locklooped = true;
					break;
				}

usleep(100);
				$data_lock = self::$_db->add($cache_id . '_lock', 1, $locktime);
				$lock_counter++;
			}

}
		$returning->locked = $data_lock;

return $returning;
	}

/**
	 * Unlock cached item - override parent for cacheid compatibility with lock
	 *
	 * @param   string  $id     The cache data id
	 * @param   string  $group  The cache data group
	 *
	 * @return  boolean  True on success, false otherwise.
	 *
	 * @since   12.1
	 */
	public function unlock($id, $group = null)
	{
		$cache_id = $this->_getCacheId($id, $group) . '_lock';

if (!$this->lockindex())
		{
			return false;
		}

$index = self::$_db->get($this->_hash . '-index');
		if ($index === false)
		{
			$index = array();
		}

foreach ($index as $key => $value)
		{
			if ($value->name == $cache_id)
			{
				unset($index[$key]);
			}
			break;
		}

self::$_db->replace($this->_hash . '-index', $index, 0);
		$this->unlockindex();

return self::$_db->delete($cache_id);
	}

/**
	 * Lock cache index
	 *
	 * @return  boolean  True on success, false otherwise.
	 *
	 * @since   12.1
	 */
	protected function lockindex()
	{
		$looptime = 300;
		$data_lock = self::$_db->add($this->_hash . '-index_lock', 1, 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;
					break;
				}

usleep(100);
				$data_lock = self::$_db->add($this->_hash . '-index_lock', 1, 30);
				$lock_counter++;
			}
		}

return true;
	}

/**
	 * Unlock cache index
	 *
	 * @return  boolean  True on success, false otherwise.
	 *
	 * @since   12.1
	 */
	protected function unlockindex()
	{
		return self::$_db->delete($this->_hash . '-index_lock');
	}
}

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	exploitczk/users	0705	2019-01-06 02:55:18
..	dir	-	exploitczk/users	0705	2019-01-06 02:55:16
apc.php	text/x-php	5.22 KB	exploitczk/users	0604	2019-01-06 07:21:59
apcu.php	text/x-php	6.45 KB	exploitczk/users	0644	2019-01-06 02:55:17
cachelite.php	text/x-php	7.03 KB	exploitczk/users	0604	2019-01-06 07:21:59
file.php	text/x-php	15.43 KB	exploitczk/users	0604	2019-01-06 07:21:59
helper.php	text/x-php	1.15 KB	exploitczk/users	0604	2019-01-06 07:21:59
index.html	text/html	31 B	exploitczk/users	0604	2016-10-08 12:06:29
memcache.php	text/x-php	10.09 KB	exploitczk/users	0604	2019-01-06 07:22:00
memcached.php	text/x-php	10.02 KB	exploitczk/users	0604	2019-01-06 07:22:00
redis.php	text/x-php	6.31 KB	exploitczk/users	0644	2019-01-06 02:55:19
wincache.php	text/x-php	4.32 KB	exploitczk/users	0604	2019-01-06 07:22:00
xcache.php	text/x-php	5.34 KB	exploitczk/users	0604	2019-01-06 07:22:00