pictcode / lib / Cake / Model / Datasource / Session / DatabaseSession.php @ 1a69c38c
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      <?php
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      /**
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       * Database Session save handler. Allows saving session information into a model.
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       *
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       * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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       * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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       *
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       * Licensed under The MIT License
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       * For full copyright and license information, please see the LICENSE.txt
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       * Redistributions of files must retain the above copyright notice.
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       *
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       * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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       * @link          http://cakephp.org CakePHP(tm) Project
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       * @package       Cake.Model.Datasource.Session
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       * @since         CakePHP(tm) v 2.0
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       * @license       http://www.opensource.org/licenses/mit-license.php MIT License
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       */
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      App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session');  | 
  
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      App::uses('ClassRegistry', 'Utility');  | 
  
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      /**
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       * DatabaseSession provides methods to be used with CakeSession.
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       *
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       * @package       Cake.Model.Datasource.Session
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       */
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      class DatabaseSession implements CakeSessionHandlerInterface {  | 
  
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      /**
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       * Reference to the model handling the session data
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       *
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       * @var Model
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       */
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      protected $_model;  | 
  
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      /**
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       * Number of seconds to mark the session as expired
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       *
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       * @var int
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       */
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      protected $_timeout;  | 
  
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      /**
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       * Constructor. Looks at Session configuration information and
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       * sets up the session model.
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       */
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      public function __construct() {  | 
  
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      $modelName = Configure::read('Session.handler.model');  | 
  
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      if (empty($modelName)) {  | 
  
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      $settings = array(  | 
  
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      'class' => 'Session',  | 
  
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      'alias' => 'Session',  | 
  
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      'table' => 'cake_sessions',  | 
  
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      );  | 
  
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                      } else {
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      $settings = array(  | 
  
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      'class' => $modelName,  | 
  
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      'alias' => 'Session',  | 
  
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      );  | 
  
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      }  | 
  
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      $this->_model = ClassRegistry::init($settings);  | 
  
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      $this->_timeout = Configure::read('Session.timeout') * 60;  | 
  
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      }  | 
  
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      /**
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       * Method called on open of a database session.
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       *
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       * @return bool Success
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       */
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      public function open() {  | 
  
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      return true;  | 
  
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      }  | 
  
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      /**
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       * Method called on close of a database session.
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       *
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       * @return bool Success
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       */
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      public function close() {  | 
  
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      return true;  | 
  
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      }  | 
  
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      /**
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       * Method used to read from a database session.
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       *
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       * @param int|string $id The key of the value to read
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       * @return mixed The value of the key or false if it does not exist
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       */
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      public function read($id) {  | 
  
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      $row = $this->_model->find('first', array(  | 
  
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      'conditions' => array($this->_model->primaryKey => $id)  | 
  
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      ));  | 
  
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      if (empty($row[$this->_model->alias]['data'])) {  | 
  
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      return false;  | 
  
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      }  | 
  
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      return $row[$this->_model->alias]['data'];  | 
  
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      }  | 
  
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      /**
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       * Helper function called on write for database sessions.
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       *
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       * Will retry, once, if the save triggers a PDOException which
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       * can happen if a race condition is encountered
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       *
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       * @param int $id ID that uniquely identifies session in database
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       * @param mixed $data The value of the data to be saved.
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       * @return bool True for successful write, false otherwise.
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       */
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      public function write($id, $data) {  | 
  
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      if (!$id) {  | 
  
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      return false;  | 
  
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      }  | 
  
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      $expires = time() + $this->_timeout;  | 
  
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      $record = compact('id', 'data', 'expires');  | 
  
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      $record[$this->_model->primaryKey] = $id;  | 
  
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      $options = array(  | 
  
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      'validate' => false,  | 
  
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      'callbacks' => false,  | 
  
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      'counterCache' => false  | 
  
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      );  | 
  
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                      try {
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      return $this->_model->save($record, $options);  | 
  
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      } catch (PDOException $e) {  | 
  
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      return $this->_model->save($record, $options);  | 
  
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      }  | 
  
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      }  | 
  
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      /**
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       * Method called on the destruction of a database session.
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       *
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       * @param int $id ID that uniquely identifies session in database
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       * @return bool True for successful delete, false otherwise.
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       */
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      public function destroy($id) {  | 
  
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      return $this->_model->delete($id);  | 
  
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      }  | 
  
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      /**
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       * Helper function called on gc for database sessions.
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       *
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       * @param int $expires Timestamp (defaults to current time)
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       * @return bool Success
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       */
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      public function gc($expires = null) {  | 
  
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      if (!$expires) {  | 
  
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      $expires = time();  | 
  
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                      } else {
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      $expires = time() - $expires;  | 
  
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      }  | 
  
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      return $this->_model->deleteAll(array($this->_model->alias . ".expires <" => $expires), false, false);  | 
  
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      }  | 
  
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      }  |