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rcube_session_memcache.php
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rcube_session_memcache.php
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<?php
/**
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2014, The Roundcube Dev Team |
| Copyright (C) 2011, Kolab Systems AG |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Provide database supported session management |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
| Author: Aleksander Machniak <alec@alec.pl> |
| Author: Cor Bosman <cor@roundcu.bet> |
+-----------------------------------------------------------------------+
*/
/**
* Class to provide memcache session storage
*
* @package Framework
* @subpackage Core
* @author Thomas Bruederli <roundcube@gmail.com>
* @author Aleksander Machniak <alec@alec.pl>
* @author Cor Bosman <cor@roundcu.be>
*/
class rcube_session_memcache extends rcube_session
{
private $memcache;
private $debug;
/**
* @param Object $config
*/
public function __construct($config)
{
parent::__construct($config);
$this->memcache = rcube::get_instance()->get_memcache();
$this->debug = $config->get('memcache_debug');
if (!$this->memcache) {
rcube::raise_error(array(
'code' => 604, 'type' => 'db',
'line' => __LINE__, 'file' => __FILE__,
'message' => "Failed to connect to memcached. Please check configuration"),
true, true);
}
// register sessions handler
$this->register_session_handler();
}
/**
* @param $save_path
* @param $session_name
* @return bool
*/
public function open($save_path, $session_name)
{
return true;
}
/**
* @return bool
*/
public function close()
{
return true;
}
/**
* Handler for session_destroy() with memcache backend
*
* @param $key
* @return bool
*/
public function destroy($key)
{
if ($key) {
// #1488592: use 2nd argument
$result = $this->memcache->delete($key, 0);
if ($this->debug) {
$this->debug('delete', $key, null, $result);
}
}
return true;
}
/**
* Read session data from memcache
*
* @param $key
* @return null|string
*/
public function read($key)
{
if ($value = $this->memcache->get($key)) {
$arr = unserialize($value);
$this->changed = $arr['changed'];
$this->ip = $arr['ip'];
$this->vars = $arr['vars'];
$this->key = $key;
}
if ($this->debug) {
$this->debug('get', $key, $value);
}
return $this->vars ?: '';
}
/**
* Write data to memcache storage
*
* @param $key
* @param $vars
*
* @return bool
*/
public function write($key, $vars)
{
$data = serialize(array('changed' => time(), 'ip' => $this->ip, 'vars' => $vars));
$result = $this->memcache->set($key, $data, MEMCACHE_COMPRESSED, $this->lifetime + 60);
if ($this->debug) {
$this->debug('set', $key, $data, $result);
}
return $result;
}
/**
* Update memcache session data
*
* @param $key
* @param $newvars
* @param $oldvars
*
* @return bool
*/
public function update($key, $newvars, $oldvars)
{
$ts = microtime(true);
if ($newvars !== $oldvars || $ts - $this->changed > $this->lifetime / 3) {
$data = serialize(array('changed' => time(), 'ip' => $this->ip, 'vars' => $newvars));
$result = $this->memcache->set($key, $data, MEMCACHE_COMPRESSED, $this->lifetime + 60);
if ($this->debug) {
$this->debug('set', $key, $data, $result);
}
return $result;
}
return true;
}
/**
* Write memcache debug info to the log
*/
protected function debug($type, $key, $data = null, $result = null)
{
$line = strtoupper($type) . ' ' . $key;
if ($data !== null) {
$line .= ' ' . $data;
}
rcube::debug('memcache', $line, $result);
}
}

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