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<?php
/**
* Core Session Handler
*
* PHP version 5
*
* @package Ukora
* @author Bas Kuis <[email protected]>
* @copyright 2012 Bas Kuis (http://www.ukora.com)
* @license http://creativecommons.org/licenses/by-nc/3.0/ Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)
* @link http://www.ukora.com/cms/documentation/
*/
class CoreSessionHandler implements SessionHandlerInterface {
/**
* Constants
*/
const MAX_SESSION_LIFETIME_PROP_KEY = 'max:session:lifetime';
const INI_SESSION_GC_MAX_LIFETIME = 'session.gc_maxlifetime';
const SESSION_DATA_COLUMN = 'werock_session_data';
const EMPTY_STRING = '';
const PDO = 'PDO';
/**
* Columns
*/
const COLUMN_ID = ':id';
const COLUMN_KEY = ':key';
const COLUMN_DATA = ':data';
const COLUMN_EXPIRES = ':expires';
/**
* Set session lifetime
*
* @var int
*/
var $lifeTime = 1440;
/**
* Set current time
*
* @var int
*/
var $currentTime = 0;
/**
* Queries
*/
const SELECT_SESSION_SQL = " SELECT * FROM `werock_sessions` WHERE `werock_session_id` = :id AND `werock_session_key` = :key AND `werock_session_expires` > :expires; ";
const UPDATE_SESSION_SQL = " UPDATE `werock_sessions` SET `werock_session_expires` = :expires, `werock_session_data` = :data WHERE `werock_session_id` = :id AND `werock_session_key` = :key; ";
const INSERT_SESSION_SQL = " INSERT INTO `werock_sessions` ( `werock_session_id`, `werock_session_expires`, `werock_session_data`, `werock_session_key` ) VALUES ( :id, :expires, :data, :key ) ON DUPLICATE KEY UPDATE `werock_session_expires` = :expires, `werock_session_data` = :data, `werock_session_key` = :key; ";
const DELETE_SESSION_SQL = " DELETE FROM `werock_sessions` WHERE `werock_session_id` = :id; ";
const DELETE_SESSIONS_SQL = " DELETE FROM `werock_sessions` WHERE `werock_session_expires` < :expires; ";
/**
* Open Session Handler
*
* @param $path
* @param $name
* @return bool
*/
public function open($path = null, $name = null){
if(CoreSysUtils::isCommandLine()) return true;
$this->lifeTime = CoreProp::get(self::MAX_SESSION_LIFETIME_PROP_KEY, ini_get(self::INI_SESSION_GC_MAX_LIFETIME));
$this->currentTime = time();
if(get_class(CoreData::mysql()) !== PDO::class && CoreData::getSqlStore()){
CoreLog::fatal('We need a db connection to store sessions');
return false;
}
return true;
}
/**
* Close session
*/
public function close(){
if(!CoreSysUtils::isCommandLine()) $this->gc(0);
return true;
}
/**
* Generate session check key, prevents session hijacking
*
* @return string
*/
public function generateKey(){
return md5(CoreSecUtils::getUserAgent() . CoreSecUtils::getRemoteIp2Octals() . SHORT_SALT);
}
/**
* Read session data
*
* @param $id
* @return string
*/
public function read($id = null){
if(CoreSysUtils::isCommandLine()) return null;
$key = self::generateKey();
$session = CoreSqlUtils::row(self::SELECT_SESSION_SQL, array(
self::COLUMN_ID => $id,
self::COLUMN_KEY => $key,
self::COLUMN_EXPIRES => $this->currentTime) //<- Unrecoverable error SELECT * FROM `werock_sessions` WHERE `werock_session_id` = :id AND `werock_session_key` = :key AND `werock_session_expires` > :expires; Info: SQLSTATE[HY000]: General error: 144 Table './rsssearchhub@002ecom/werock_sessions' is marked as crashed and last (automatic?) repair failed
);
return isset($session[self::SESSION_DATA_COLUMN]) ? $session[self::SESSION_DATA_COLUMN] : self::EMPTY_STRING;
}
/**
* Write session data
*
* @param $id
* @param $data
* @return bool
*/
public function write($id = null, $data = null){
if(CoreSysUtils::isCommandLine()) return true;
$expiration = time() + $this->lifeTime;
$key = self::generateKey();
if(false === CoreSqlUtils::update(self::UPDATE_SESSION_SQL, array(
self::COLUMN_ID => $id,
self::COLUMN_EXPIRES => $expiration,
self::COLUMN_DATA => $data,
self::COLUMN_KEY => $key
))){
return (false !== CoreSqlUtils::insert(self::INSERT_SESSION_SQL, array(
self::COLUMN_ID => $id,
self::COLUMN_EXPIRES => $expiration,
self::COLUMN_DATA => $data,
self::COLUMN_KEY => $key
)));
}
return true;
}
/**
* Destroy session
*
* @param null $id
* @return bool
*/
public function destroy($id = null){
if(CoreSysUtils::isCommandLine()) return true;
return (CoreSqlUtils::delete(self::DELETE_SESSION_SQL, array(
self::COLUMN_ID => $id
)) > 0);
}
/**
* Session garbage collection
* @param int $maxLifeTime
*
* @return bool
*/
public function gc($maxLifeTime){
if(CoreSysUtils::isCommandLine()) return true;
return CoreSqlUtils::delete(self::DELETE_SESSIONS_SQL, array(
self::COLUMN_EXPIRES => $this->currentTime
));
}
}
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