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<?php
/**
 * This file contains classes implementing security manager feature.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CStatePersister implements a file-based persistent data storage.
 *
 * It can be used to keep data available through multiple requests and sessions.
 *
 * By default, CStatePersister stores data in a file named 'state.bin' that is located
 * under the application {@link CApplication::getRuntimePath runtime path}.
 * You may change the location by setting the {@link stateFile} property.
 *
 * To retrieve the data from CStatePersister, call {@link load()}. To save the data,
 * call {@link save()}.
 *
 * Comparison among state persister, session and cache is as follows:
 * <ul>
 * <li>session: data persisting within a single user session.</li>
 * <li>state persister: data persisting through all requests/sessions (e.g. hit counter).</li>
 * <li>cache: volatile and fast storage. It may be used as storage medium for session or state persister.</li>
 * </ul>
 *
 * Since server resource is often limited, be cautious if you plan to use CStatePersister
 * to store large amount of data. You should also consider using database-based persister
 * to improve the throughput.
 *
 * CStatePersister is a core application component used to store global application state.
 * It may be accessed via {@link CApplication::getStatePersister()}.
 * page state persistent method based on cache.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package system.base
 * @since 1.0
 */
class CStatePersister extends CApplicationComponent implements IStatePersister
{
	/**
	 * @var string the file path storing the state data. Make sure the directory containing
	 * the file exists and is writable by the Web server process. If using relative path, also
	 * make sure the path is correct.
	 */
	public $stateFile;
	/**
	 * @var string the ID of the cache application component that is used to cache the state values.
	 * Defaults to 'cache' which refers to the primary cache application component.
	 * Set this property to false if you want to disable caching state values.
	 */
	public $cacheID='cache';

/**
	 * Initializes the component.
	 * This method overrides the parent implementation by making sure {@link stateFile}
	 * contains valid value.
	 */
	public function init()
	{
		parent::init();
		if($this->stateFile===null)
			$this->stateFile=Yii::app()->getRuntimePath().DIRECTORY_SEPARATOR.'state.bin';
		$dir=dirname($this->stateFile);
		if(!is_dir($dir) || !is_writable($dir))
			throw new CException(Yii::t('yii','Unable to create application state file "{file}". Make sure the directory containing the file exists and is writable by the Web server process.',
				array('{file}'=>$this->stateFile)));
	}

/**
	 * Loads state data from persistent storage.
	 * @return mixed state data. Null if no state data available.
	 */
	public function load()
	{
		$stateFile=$this->stateFile;
		if($this->cacheID!==false && ($cache=Yii::app()->getComponent($this->cacheID))!==null)
		{
			$cacheKey='Yii.CStatePersister.'.$stateFile;
			if(($value=$cache->get($cacheKey))!==false)
				return unserialize($value);
			elseif(($content=@file_get_contents($stateFile))!==false)
			{
				$cache->set($cacheKey,$content,0,new CFileCacheDependency($stateFile));
				return unserialize($content);
			}
			else
				return null;
		}
		elseif(($content=@file_get_contents($stateFile))!==false)
			return unserialize($content);
		else
			return null;
	}

/**
	 * Saves application state in persistent storage.
	 * @param mixed $state state data (must be serializable).
	 */
	public function save($state)
	{
		file_put_contents($this->stateFile,serialize($state),LOCK_EX);
	}
}

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Name	Size	Perms	Modified	Actions
CApplication.php	31.03 KB	lrw-r--r--	2024-11-22 17:53:16	Edit Download recursive recursive
CApplicationComponent.php	1.93 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CBehavior.php	3.24 KB	lrw-r--r--	2024-11-22 17:53:16	Edit Download recursive recursive
CComponent.php	21.98 KB	lrw-r--r--	2024-11-22 17:53:16	Edit Download recursive recursive
CErrorEvent.php	1.04 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CErrorHandler.php	16.49 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CException.php	410 B	lrw-r--r--	2024-11-22 17:53:16	Edit Download recursive recursive
CExceptionEvent.php	785 B	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CHttpException.php	990 B	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CModel.php	20.01 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CModelBehavior.php	2.04 KB	lrw-r--r--	2024-11-22 17:53:16	Edit Download recursive recursive
CModelEvent.php	1013 B	lrw-r--r--	2024-11-22 17:53:16	Edit Download recursive recursive
CModule.php	16.65 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CSecurityManager.php	17.32 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
CStatePersister.php	3.73 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive
error_log	134.43 KB	lrw-r--r--	2025-11-05 01:03:20	Edit Download recursive recursive
interfaces.php	22.32 KB	lrw-r--r--	2024-11-22 17:53:15	Edit Download recursive recursive

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