pictcode / lib / Cake / Model / Datasource / Session / DatabaseSession.php @ master
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| 1 | 635eef61 | spyder1211 | <?php
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| 2 | /**
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| 3 | * Database Session save handler. Allows saving session information into a model.
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| 4 | *
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| 5 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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| 6 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 7 | *
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| 8 | * Licensed under The MIT License
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| 9 | * For full copyright and license information, please see the LICENSE.txt
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| 10 | * Redistributions of files must retain the above copyright notice.
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| 11 | *
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| 12 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 13 | * @link http://cakephp.org CakePHP(tm) Project
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| 14 | * @package Cake.Model.Datasource.Session
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| 15 | * @since CakePHP(tm) v 2.0
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| 16 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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| 17 | */
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| 18 | |||
| 19 | App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session'); |
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| 20 | App::uses('ClassRegistry', 'Utility'); |
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| 21 | |||
| 22 | /**
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| 23 | * DatabaseSession provides methods to be used with CakeSession.
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| 24 | *
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| 25 | * @package Cake.Model.Datasource.Session
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| 26 | */
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| 27 | class DatabaseSession implements CakeSessionHandlerInterface { |
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| 28 | |||
| 29 | /**
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| 30 | * Reference to the model handling the session data
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| 31 | *
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| 32 | * @var Model
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| 33 | */
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| 34 | protected $_model; |
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| 35 | |||
| 36 | /**
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| 37 | * Number of seconds to mark the session as expired
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| 38 | *
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| 39 | * @var int
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| 40 | */
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| 41 | protected $_timeout; |
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| 42 | |||
| 43 | /**
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| 44 | * Constructor. Looks at Session configuration information and
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| 45 | * sets up the session model.
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| 46 | */
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| 47 | public function __construct() { |
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| 48 | $modelName = Configure::read('Session.handler.model'); |
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| 49 | |||
| 50 | if (empty($modelName)) { |
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| 51 | $settings = array( |
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| 52 | 'class' => 'Session', |
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| 53 | 'alias' => 'Session', |
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| 54 | 'table' => 'cake_sessions', |
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| 55 | ); |
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| 56 | } else {
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| 57 | $settings = array( |
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| 58 | 'class' => $modelName, |
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| 59 | 'alias' => 'Session', |
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| 60 | ); |
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| 61 | } |
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| 62 | $this->_model = ClassRegistry::init($settings); |
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| 63 | $this->_timeout = Configure::read('Session.timeout') * 60; |
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| 64 | } |
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| 65 | |||
| 66 | /**
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| 67 | * Method called on open of a database session.
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| 68 | *
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| 69 | * @return bool Success
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| 70 | */
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| 71 | public function open() { |
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| 72 | return true; |
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| 73 | } |
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| 74 | |||
| 75 | /**
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| 76 | * Method called on close of a database session.
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| 77 | *
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| 78 | * @return bool Success
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| 79 | */
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| 80 | public function close() { |
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| 81 | return true; |
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| 82 | } |
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| 83 | |||
| 84 | /**
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| 85 | * Method used to read from a database session.
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| 86 | *
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| 87 | * @param int|string $id The key of the value to read
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| 88 | * @return mixed The value of the key or false if it does not exist
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| 89 | */
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| 90 | public function read($id) { |
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| 91 | $row = $this->_model->find('first', array( |
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| 92 | 'conditions' => array($this->_model->primaryKey => $id) |
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| 93 | )); |
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| 94 | |||
| 95 | if (empty($row[$this->_model->alias]['data'])) { |
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| 96 | return false; |
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| 97 | } |
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| 98 | |||
| 99 | return $row[$this->_model->alias]['data']; |
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| 100 | } |
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| 101 | |||
| 102 | /**
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| 103 | * Helper function called on write for database sessions.
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| 104 | *
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| 105 | * Will retry, once, if the save triggers a PDOException which
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| 106 | * can happen if a race condition is encountered
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| 107 | *
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| 108 | * @param int $id ID that uniquely identifies session in database
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| 109 | * @param mixed $data The value of the data to be saved.
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| 110 | * @return bool True for successful write, false otherwise.
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| 111 | */
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| 112 | public function write($id, $data) { |
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| 113 | if (!$id) { |
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| 114 | return false; |
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| 115 | } |
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| 116 | $expires = time() + $this->_timeout; |
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| 117 | $record = compact('id', 'data', 'expires'); |
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| 118 | $record[$this->_model->primaryKey] = $id; |
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| 119 | |||
| 120 | $options = array( |
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| 121 | 'validate' => false, |
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| 122 | 'callbacks' => false, |
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| 123 | 'counterCache' => false |
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| 124 | ); |
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| 125 | try {
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| 126 | return $this->_model->save($record, $options); |
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| 127 | } catch (PDOException $e) { |
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| 128 | return $this->_model->save($record, $options); |
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| 129 | } |
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| 130 | } |
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| 131 | |||
| 132 | /**
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| 133 | * Method called on the destruction of a database session.
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| 134 | *
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| 135 | * @param int $id ID that uniquely identifies session in database
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| 136 | * @return bool True for successful delete, false otherwise.
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| 137 | */
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| 138 | public function destroy($id) { |
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| 139 | return $this->_model->delete($id); |
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| 140 | } |
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| 141 | |||
| 142 | /**
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| 143 | * Helper function called on gc for database sessions.
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| 144 | *
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| 145 | * @param int $expires Timestamp (defaults to current time)
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| 146 | * @return bool Success
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| 147 | */
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| 148 | public function gc($expires = null) { |
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| 149 | if (!$expires) { |
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| 150 | $expires = time(); |
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| 151 | } else {
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| 152 | $expires = time() - $expires; |
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| 153 | } |
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| 154 | return $this->_model->deleteAll(array($this->_model->alias . ".expires <" => $expires), false, false); |
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| 155 | } |
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| 156 | |||
| 157 | } |