pictcode / lib / Cake / Model / Datasource / CakeSession.php @ 787484d2
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| 1 | 635eef61 | spyder1211 | <?php
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| 2 | /**
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| 3 | * Session class for CakePHP.
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| 4 | *
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| 5 | * CakePHP abstracts the handling of sessions.
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| 6 | * There are several convenient methods to access session information.
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| 7 | * This class is the implementation of those methods.
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| 8 | * They are mostly used by the Session Component.
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| 9 | *
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| 10 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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| 11 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 12 | *
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| 13 | * Licensed under The MIT License
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| 14 | * For full copyright and license information, please see the LICENSE.txt
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| 15 | * Redistributions of files must retain the above copyright notice.
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| 16 | *
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| 17 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 18 | * @link http://cakephp.org CakePHP(tm) Project
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| 19 | * @package Cake.Model.Datasource
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| 20 | * @since CakePHP(tm) v .0.10.0.1222
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| 21 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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| 22 | */
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| 23 | |||
| 24 | App::uses('Hash', 'Utility'); |
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| 25 | App::uses('Security', 'Utility'); |
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| 26 | |||
| 27 | /**
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| 28 | * Session class for CakePHP.
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| 29 | *
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| 30 | * CakePHP abstracts the handling of sessions. There are several convenient methods to access session information.
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| 31 | * This class is the implementation of those methods. They are mostly used by the Session Component.
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| 32 | *
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| 33 | * @package Cake.Model.Datasource
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| 34 | */
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| 35 | class CakeSession { |
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| 36 | |||
| 37 | /**
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| 38 | * True if the Session is still valid
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| 39 | *
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| 40 | * @var bool
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| 41 | */
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| 42 | public static $valid = false; |
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| 43 | |||
| 44 | /**
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| 45 | * Error messages for this session
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| 46 | *
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| 47 | * @var array
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| 48 | */
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| 49 | public static $error = false; |
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| 50 | |||
| 51 | /**
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| 52 | * User agent string
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| 53 | *
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| 54 | * @var string
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| 55 | */
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| 56 | protected static $_userAgent = ''; |
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| 57 | |||
| 58 | /**
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| 59 | * Path to where the session is active.
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| 60 | *
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| 61 | * @var string
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| 62 | */
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| 63 | public static $path = '/'; |
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| 64 | |||
| 65 | /**
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| 66 | * Error number of last occurred error
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| 67 | *
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| 68 | * @var int
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| 69 | */
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| 70 | public static $lastError = null; |
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| 71 | |||
| 72 | /**
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| 73 | * Start time for this session.
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| 74 | *
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| 75 | * @var int
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| 76 | */
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| 77 | public static $time = false; |
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| 78 | |||
| 79 | /**
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| 80 | * Cookie lifetime
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| 81 | *
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| 82 | * @var int
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| 83 | */
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| 84 | public static $cookieLifeTime; |
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| 85 | |||
| 86 | /**
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| 87 | * Time when this session becomes invalid.
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| 88 | *
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| 89 | * @var int
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| 90 | */
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| 91 | public static $sessionTime = false; |
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| 92 | |||
| 93 | /**
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| 94 | * Current Session id
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| 95 | *
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| 96 | * @var string
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| 97 | */
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| 98 | public static $id = null; |
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| 99 | |||
| 100 | /**
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| 101 | * Hostname
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| 102 | *
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| 103 | * @var string
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| 104 | */
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| 105 | public static $host = null; |
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| 106 | |||
| 107 | /**
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| 108 | * Session timeout multiplier factor
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| 109 | *
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| 110 | * @var int
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| 111 | */
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| 112 | public static $timeout = null; |
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| 113 | |||
| 114 | /**
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| 115 | * Number of requests that can occur during a session time without the session being renewed.
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| 116 | * This feature is only used when config value `Session.autoRegenerate` is set to true.
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| 117 | *
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| 118 | * @var int
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| 119 | * @see CakeSession::_checkValid()
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| 120 | */
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| 121 | public static $requestCountdown = 10; |
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| 122 | |||
| 123 | /**
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| 124 | * Whether or not the init function in this class was already called
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| 125 | *
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| 126 | * @var bool
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| 127 | */
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| 128 | protected static $_initialized = false; |
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| 129 | |||
| 130 | /**
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| 131 | * Session cookie name
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| 132 | *
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| 133 | * @var string
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| 134 | */
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| 135 | protected static $_cookieName = null; |
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| 136 | |||
| 137 | /**
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| 138 | * Pseudo constructor.
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| 139 | *
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| 140 | * @param string|null $base The base path for the Session
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| 141 | * @return void
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| 142 | */
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| 143 | public static function init($base = null) { |
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| 144 | static::$time = time(); |
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| 145 | |||
| 146 | if (env('HTTP_USER_AGENT')) { |
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| 147 | static::$_userAgent = md5(env('HTTP_USER_AGENT') . Configure::read('Security.salt')); |
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| 148 | } |
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| 149 | |||
| 150 | static::_setPath($base); |
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| 151 | static::_setHost(env('HTTP_HOST')); |
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| 152 | |||
| 153 | if (!static::$_initialized) { |
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| 154 | register_shutdown_function('session_write_close'); |
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| 155 | } |
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| 156 | |||
| 157 | static::$_initialized = true; |
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| 158 | } |
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| 159 | |||
| 160 | /**
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| 161 | * Setup the Path variable
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| 162 | *
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| 163 | * @param string|null $base base path
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| 164 | * @return void
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| 165 | */
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| 166 | protected static function _setPath($base = null) { |
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| 167 | if (empty($base)) { |
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| 168 | static::$path = '/'; |
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| 169 | return;
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| 170 | } |
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| 171 | if (strpos($base, 'index.php') !== false) { |
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| 172 | $base = str_replace('index.php', '', $base); |
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| 173 | } |
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| 174 | if (strpos($base, '?') !== false) { |
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| 175 | $base = str_replace('?', '', $base); |
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| 176 | } |
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| 177 | static::$path = $base; |
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| 178 | } |
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| 179 | |||
| 180 | /**
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| 181 | * Set the host name
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| 182 | *
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| 183 | * @param string $host Hostname
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| 184 | * @return void
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| 185 | */
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| 186 | protected static function _setHost($host) { |
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| 187 | static::$host = $host; |
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| 188 | if (strpos(static::$host, ':') !== false) { |
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| 189 | static::$host = substr(static::$host, 0, strpos(static::$host, ':')); |
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| 190 | } |
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| 191 | } |
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| 192 | |||
| 193 | /**
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| 194 | * Starts the Session.
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| 195 | *
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| 196 | * @return bool True if session was started
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| 197 | */
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| 198 | public static function start() { |
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| 199 | if (static::started()) { |
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| 200 | return true; |
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| 201 | } |
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| 202 | |||
| 203 | $id = static::id(); |
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| 204 | static::_startSession();
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| 205 | |||
| 206 | if (!$id && static::started()) { |
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| 207 | static::_checkValid();
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| 208 | } |
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| 209 | |||
| 210 | static::$error = false; |
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| 211 | static::$valid = true; |
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| 212 | return static::started(); |
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| 213 | } |
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| 214 | |||
| 215 | /**
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| 216 | * Determine if Session has been started.
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| 217 | *
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| 218 | * @return bool True if session has been started.
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| 219 | */
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| 220 | public static function started() { |
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| 221 | return isset($_SESSION) && session_id(); |
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| 222 | } |
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| 223 | |||
| 224 | /**
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| 225 | * Returns true if given variable is set in session.
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| 226 | *
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| 227 | * @param string $name Variable name to check for
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| 228 | * @return bool True if variable is there
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| 229 | */
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| 230 | public static function check($name) { |
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| 231 | if (empty($name) || !static::_hasSession() || !static::start()) { |
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| 232 | return false; |
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| 233 | } |
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| 234 | |||
| 235 | return Hash::get($_SESSION, $name) !== null; |
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| 236 | } |
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| 237 | |||
| 238 | /**
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| 239 | * Returns the session id.
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| 240 | * Calling this method will not auto start the session. You might have to manually
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| 241 | * assert a started session.
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| 242 | *
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| 243 | * Passing an id into it, you can also replace the session id if the session
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| 244 | * has not already been started.
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| 245 | * Note that depending on the session handler, not all characters are allowed
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| 246 | * within the session id. For example, the file session handler only allows
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| 247 | * characters in the range a-z A-Z 0-9 , (comma) and - (minus).
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| 248 | *
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| 249 | * @param string|null $id Id to replace the current session id
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| 250 | * @return string Session id
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| 251 | */
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| 252 | public static function id($id = null) { |
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| 253 | if ($id) { |
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| 254 | static::$id = $id; |
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| 255 | session_id(static::$id); |
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| 256 | } |
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| 257 | if (static::started()) { |
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| 258 | return session_id();
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| 259 | } |
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| 260 | return static::$id; |
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| 261 | } |
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| 262 | |||
| 263 | /**
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| 264 | * Removes a variable from session.
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| 265 | *
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| 266 | * @param string $name Session variable to remove
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| 267 | * @return bool Success
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| 268 | */
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| 269 | public static function delete($name) { |
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| 270 | if (static::check($name)) { |
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| 271 | static::_overwrite($_SESSION, Hash::remove($_SESSION, $name)); |
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| 272 | return !static::check($name); |
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| 273 | } |
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| 274 | return false; |
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| 275 | } |
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| 276 | |||
| 277 | /**
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| 278 | * Used to write new data to _SESSION, since PHP doesn't like us setting the _SESSION var itself.
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| 279 | *
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| 280 | * @param array &$old Set of old variables => values
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| 281 | * @param array $new New set of variable => value
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| 282 | * @return void
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| 283 | */
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| 284 | protected static function _overwrite(&$old, $new) { |
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| 285 | if (!empty($old)) { |
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| 286 | foreach ($old as $key => $var) { |
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| 287 | if (!isset($new[$key])) { |
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| 288 | unset($old[$key]); |
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| 289 | } |
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| 290 | } |
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| 291 | } |
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| 292 | foreach ($new as $key => $var) { |
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| 293 | $old[$key] = $var; |
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| 294 | } |
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| 295 | } |
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| 296 | |||
| 297 | /**
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| 298 | * Return error description for given error number.
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| 299 | *
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| 300 | * @param int $errorNumber Error to set
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| 301 | * @return string Error as string
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| 302 | */
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| 303 | protected static function _error($errorNumber) { |
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| 304 | if (!is_array(static::$error) || !array_key_exists($errorNumber, static::$error)) { |
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| 305 | return false; |
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| 306 | } |
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| 307 | return static::$error[$errorNumber]; |
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| 308 | } |
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| 309 | |||
| 310 | /**
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| 311 | * Returns last occurred error as a string, if any.
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| 312 | *
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| 313 | * @return mixed Error description as a string, or false.
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| 314 | */
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| 315 | public static function error() { |
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| 316 | if (static::$lastError) { |
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| 317 | return static::_error(static::$lastError); |
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| 318 | } |
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| 319 | return false; |
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| 320 | } |
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| 321 | |||
| 322 | /**
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| 323 | * Returns true if session is valid.
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| 324 | *
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| 325 | * @return bool Success
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| 326 | */
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| 327 | public static function valid() { |
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| 328 | if (static::start() && static::read('Config')) { |
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| 329 | if (static::_validAgentAndTime() && static::$error === false) { |
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| 330 | static::$valid = true; |
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| 331 | } else {
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| 332 | static::$valid = false; |
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| 333 | static::_setError(1, 'Session Highjacking Attempted !!!'); |
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| 334 | } |
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| 335 | } |
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| 336 | return static::$valid; |
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| 337 | } |
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| 338 | |||
| 339 | /**
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| 340 | * Tests that the user agent is valid and that the session hasn't 'timed out'.
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| 341 | * Since timeouts are implemented in CakeSession it checks the current static::$time
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| 342 | * against the time the session is set to expire. The User agent is only checked
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| 343 | * if Session.checkAgent == true.
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| 344 | *
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| 345 | * @return bool
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| 346 | */
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| 347 | protected static function _validAgentAndTime() { |
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| 348 | $config = static::read('Config'); |
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| 349 | $validAgent = (
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| 350 | Configure::read('Session.checkAgent') === false || |
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| 351 | isset($config['userAgent']) && static::$_userAgent === $config['userAgent'] |
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| 352 | ); |
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| 353 | return ($validAgent && static::$time <= $config['time']); |
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| 354 | } |
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| 355 | |||
| 356 | /**
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| 357 | * Get / Set the user agent
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| 358 | *
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| 359 | * @param string|null $userAgent Set the user agent
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| 360 | * @return string Current user agent.
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| 361 | */
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| 362 | public static function userAgent($userAgent = null) { |
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| 363 | if ($userAgent) { |
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| 364 | static::$_userAgent = $userAgent; |
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| 365 | } |
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| 366 | if (empty(static::$_userAgent)) { |
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| 367 | CakeSession::init(static::$path); |
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| 368 | } |
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| 369 | return static::$_userAgent; |
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| 370 | } |
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| 371 | |||
| 372 | /**
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| 373 | * Returns given session variable, or all of them, if no parameters given.
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| 374 | *
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| 375 | * @param string|null $name The name of the session variable (or a path as sent to Set.extract)
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| 376 | * @return mixed The value of the session variable, null if session not available,
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| 377 | * session not started, or provided name not found in the session, false on failure.
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| 378 | */
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| 379 | public static function read($name = null) { |
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| 380 | if (empty($name) && $name !== null) { |
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| 381 | return null; |
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| 382 | } |
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| 383 | if (!static::_hasSession() || !static::start()) { |
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| 384 | return null; |
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| 385 | } |
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| 386 | if ($name === null) { |
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| 387 | return static::_returnSessionVars(); |
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| 388 | } |
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| 389 | $result = Hash::get($_SESSION, $name); |
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| 390 | |||
| 391 | if (isset($result)) { |
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| 392 | return $result; |
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| 393 | } |
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| 394 | return null; |
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| 395 | } |
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| 396 | |||
| 397 | /**
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| 398 | * Returns all session variables.
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| 399 | *
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| 400 | * @return mixed Full $_SESSION array, or false on error.
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| 401 | */
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| 402 | protected static function _returnSessionVars() { |
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| 403 | if (!empty($_SESSION)) { |
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| 404 | return $_SESSION; |
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| 405 | } |
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| 406 | static::_setError(2, 'No Session vars set'); |
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| 407 | return false; |
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| 408 | } |
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| 409 | |||
| 410 | /**
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| 411 | * Writes value to given session variable name.
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| 412 | *
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| 413 | * @param string|array $name Name of variable
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| 414 | * @param string $value Value to write
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| 415 | * @return bool True if the write was successful, false if the write failed
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| 416 | */
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| 417 | public static function write($name, $value = null) { |
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| 418 | if (empty($name) || !static::start()) { |
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| 419 | return false; |
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| 420 | } |
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| 421 | |||
| 422 | $write = $name; |
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| 423 | if (!is_array($name)) { |
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| 424 | $write = array($name => $value); |
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| 425 | } |
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| 426 | foreach ($write as $key => $val) { |
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| 427 | static::_overwrite($_SESSION, Hash::insert($_SESSION, $key, $val)); |
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| 428 | if (Hash::get($_SESSION, $key) !== $val) { |
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| 429 | return false; |
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| 430 | } |
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| 431 | } |
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| 432 | return true; |
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| 433 | } |
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| 434 | |||
| 435 | /**
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| 436 | * Reads and deletes a variable from session.
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| 437 | *
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| 438 | * @param string $name The key to read and remove (or a path as sent to Hash.extract).
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| 439 | * @return mixed The value of the session variable, null if session not available,
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| 440 | * session not started, or provided name not found in the session.
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| 441 | */
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| 442 | public static function consume($name) { |
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| 443 | if (empty($name)) { |
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| 444 | return null; |
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| 445 | } |
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| 446 | $value = static::read($name); |
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| 447 | if ($value !== null) { |
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| 448 | static::_overwrite($_SESSION, Hash::remove($_SESSION, $name)); |
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| 449 | } |
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| 450 | return $value; |
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| 451 | } |
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| 452 | |||
| 453 | /**
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| 454 | * Helper method to destroy invalid sessions.
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| 455 | *
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| 456 | * @return void
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| 457 | */
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| 458 | public static function destroy() { |
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| 459 | if (!static::started()) { |
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| 460 | static::_startSession();
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| 461 | } |
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| 462 | |||
| 463 | if (static::started()) { |
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| 464 | session_destroy(); |
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| 465 | } |
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| 466 | |||
| 467 | $_SESSION = null; |
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| 468 | static::$id = null; |
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| 469 | static::$_cookieName = null; |
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| 470 | } |
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| 471 | |||
| 472 | /**
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| 473 | * Clears the session.
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| 474 | *
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| 475 | * Optionally also clears the session id and renews the session.
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| 476 | *
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| 477 | * @param bool $renew If the session should also be renewed. Defaults to true.
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| 478 | * @return void
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| 479 | */
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| 480 | public static function clear($renew = true) { |
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| 481 | if (!$renew) { |
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| 482 | $_SESSION = array(); |
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| 483 | return;
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| 484 | } |
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| 485 | |||
| 486 | $_SESSION = null; |
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| 487 | static::$id = null; |
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| 488 | static::renew();
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| 489 | } |
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| 490 | |||
| 491 | /**
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| 492 | * Helper method to initialize a session, based on CakePHP core settings.
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| 493 | *
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| 494 | * Sessions can be configured with a few shortcut names as well as have any number of ini settings declared.
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| 495 | *
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| 496 | * @return void
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| 497 | * @throws CakeSessionException Throws exceptions when ini_set() fails.
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| 498 | */
|
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| 499 | protected static function _configureSession() { |
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| 500 | $sessionConfig = Configure::read('Session'); |
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| 501 | |||
| 502 | if (isset($sessionConfig['defaults'])) { |
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| 503 | $defaults = static::_defaultConfig($sessionConfig['defaults']); |
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| 504 | if ($defaults) { |
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| 505 | $sessionConfig = Hash::merge($defaults, $sessionConfig); |
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| 506 | } |
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| 507 | } |
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| 508 | if (!isset($sessionConfig['ini']['session.cookie_secure']) && env('HTTPS')) { |
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| 509 | $sessionConfig['ini']['session.cookie_secure'] = 1; |
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| 510 | } |
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| 511 | if (isset($sessionConfig['timeout']) && !isset($sessionConfig['cookieTimeout'])) { |
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| 512 | $sessionConfig['cookieTimeout'] = $sessionConfig['timeout']; |
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| 513 | } |
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| 514 | if (!isset($sessionConfig['ini']['session.cookie_lifetime'])) { |
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| 515 | $sessionConfig['ini']['session.cookie_lifetime'] = $sessionConfig['cookieTimeout'] * 60; |
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| 516 | } |
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| 517 | |||
| 518 | if (!isset($sessionConfig['ini']['session.name'])) { |
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| 519 | $sessionConfig['ini']['session.name'] = $sessionConfig['cookie']; |
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| 520 | } |
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| 521 | static::$_cookieName = $sessionConfig['ini']['session.name']; |
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| 522 | |||
| 523 | if (!empty($sessionConfig['handler'])) { |
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| 524 | $sessionConfig['ini']['session.save_handler'] = 'user'; |
||
| 525 | } elseif (!empty($sessionConfig['session.save_path']) && Configure::read('debug')) { |
||
| 526 | if (!is_dir($sessionConfig['session.save_path'])) { |
||
| 527 | mkdir($sessionConfig['session.save_path'], 0775, true); |
||
| 528 | } |
||
| 529 | } |
||
| 530 | |||
| 531 | if (!isset($sessionConfig['ini']['session.gc_maxlifetime'])) { |
||
| 532 | $sessionConfig['ini']['session.gc_maxlifetime'] = $sessionConfig['timeout'] * 60; |
||
| 533 | } |
||
| 534 | if (!isset($sessionConfig['ini']['session.cookie_httponly'])) { |
||
| 535 | $sessionConfig['ini']['session.cookie_httponly'] = 1; |
||
| 536 | } |
||
| 537 | |||
| 538 | if (empty($_SESSION)) { |
||
| 539 | if (!empty($sessionConfig['ini']) && is_array($sessionConfig['ini'])) { |
||
| 540 | foreach ($sessionConfig['ini'] as $setting => $value) { |
||
| 541 | if (ini_set($setting, $value) === false) { |
||
| 542 | throw new CakeSessionException(__d('cake_dev', 'Unable to configure the session, setting %s failed.', $setting)); |
||
| 543 | } |
||
| 544 | } |
||
| 545 | } |
||
| 546 | } |
||
| 547 | if (!empty($sessionConfig['handler']) && !isset($sessionConfig['handler']['engine'])) { |
||
| 548 | call_user_func_array('session_set_save_handler', $sessionConfig['handler']); |
||
| 549 | } |
||
| 550 | if (!empty($sessionConfig['handler']['engine'])) { |
||
| 551 | $handler = static::_getHandler($sessionConfig['handler']['engine']); |
||
| 552 | session_set_save_handler( |
||
| 553 | array($handler, 'open'), |
||
| 554 | array($handler, 'close'), |
||
| 555 | array($handler, 'read'), |
||
| 556 | array($handler, 'write'), |
||
| 557 | array($handler, 'destroy'), |
||
| 558 | array($handler, 'gc') |
||
| 559 | ); |
||
| 560 | } |
||
| 561 | Configure::write('Session', $sessionConfig); |
||
| 562 | static::$sessionTime = static::$time + ($sessionConfig['timeout'] * 60); |
||
| 563 | } |
||
| 564 | |||
| 565 | /**
|
||
| 566 | * Get session cookie name.
|
||
| 567 | *
|
||
| 568 | * @return string
|
||
| 569 | */
|
||
| 570 | protected static function _cookieName() { |
||
| 571 | if (static::$_cookieName !== null) { |
||
| 572 | return static::$_cookieName; |
||
| 573 | } |
||
| 574 | |||
| 575 | static::init();
|
||
| 576 | static::_configureSession();
|
||
| 577 | |||
| 578 | return static::$_cookieName = session_name(); |
||
| 579 | } |
||
| 580 | |||
| 581 | /**
|
||
| 582 | * Returns whether a session exists
|
||
| 583 | *
|
||
| 584 | * @return bool
|
||
| 585 | */
|
||
| 586 | protected static function _hasSession() { |
||
| 587 | return static::started() || isset($_COOKIE[static::_cookieName()]); |
||
| 588 | } |
||
| 589 | |||
| 590 | /**
|
||
| 591 | * Find the handler class and make sure it implements the correct interface.
|
||
| 592 | *
|
||
| 593 | * @param string $handler Handler name.
|
||
| 594 | * @return void
|
||
| 595 | * @throws CakeSessionException
|
||
| 596 | */
|
||
| 597 | protected static function _getHandler($handler) { |
||
| 598 | list($plugin, $class) = pluginSplit($handler, true); |
||
| 599 | App::uses($class, $plugin . 'Model/Datasource/Session'); |
||
| 600 | if (!class_exists($class)) { |
||
| 601 | throw new CakeSessionException(__d('cake_dev', 'Could not load %s to handle the session.', $class)); |
||
| 602 | } |
||
| 603 | $handler = new $class(); |
||
| 604 | if ($handler instanceof CakeSessionHandlerInterface) { |
||
| 605 | return $handler; |
||
| 606 | } |
||
| 607 | throw new CakeSessionException(__d('cake_dev', 'Chosen SessionHandler does not implement CakeSessionHandlerInterface it cannot be used with an engine key.')); |
||
| 608 | } |
||
| 609 | |||
| 610 | /**
|
||
| 611 | * Get one of the prebaked default session configurations.
|
||
| 612 | *
|
||
| 613 | * @param string $name Config name.
|
||
| 614 | * @return bool|array
|
||
| 615 | */
|
||
| 616 | protected static function _defaultConfig($name) { |
||
| 617 | $defaults = array( |
||
| 618 | 'php' => array( |
||
| 619 | 'cookie' => 'CAKEPHP', |
||
| 620 | 'timeout' => 240, |
||
| 621 | 'ini' => array( |
||
| 622 | 'session.use_trans_sid' => 0, |
||
| 623 | 'session.cookie_path' => static::$path |
||
| 624 | ) |
||
| 625 | ), |
||
| 626 | 'cake' => array( |
||
| 627 | 'cookie' => 'CAKEPHP', |
||
| 628 | 'timeout' => 240, |
||
| 629 | 'ini' => array( |
||
| 630 | 'session.use_trans_sid' => 0, |
||
| 631 | 'url_rewriter.tags' => '', |
||
| 632 | 'session.serialize_handler' => 'php', |
||
| 633 | 'session.use_cookies' => 1, |
||
| 634 | 'session.cookie_path' => static::$path, |
||
| 635 | 'session.save_path' => TMP . 'sessions', |
||
| 636 | 'session.save_handler' => 'files' |
||
| 637 | ) |
||
| 638 | ), |
||
| 639 | 'cache' => array( |
||
| 640 | 'cookie' => 'CAKEPHP', |
||
| 641 | 'timeout' => 240, |
||
| 642 | 'ini' => array( |
||
| 643 | 'session.use_trans_sid' => 0, |
||
| 644 | 'url_rewriter.tags' => '', |
||
| 645 | 'session.use_cookies' => 1, |
||
| 646 | 'session.cookie_path' => static::$path, |
||
| 647 | 'session.save_handler' => 'user', |
||
| 648 | ), |
||
| 649 | 'handler' => array( |
||
| 650 | 'engine' => 'CacheSession', |
||
| 651 | 'config' => 'default' |
||
| 652 | ) |
||
| 653 | ), |
||
| 654 | 'database' => array( |
||
| 655 | 'cookie' => 'CAKEPHP', |
||
| 656 | 'timeout' => 240, |
||
| 657 | 'ini' => array( |
||
| 658 | 'session.use_trans_sid' => 0, |
||
| 659 | 'url_rewriter.tags' => '', |
||
| 660 | 'session.use_cookies' => 1, |
||
| 661 | 'session.cookie_path' => static::$path, |
||
| 662 | 'session.save_handler' => 'user', |
||
| 663 | 'session.serialize_handler' => 'php', |
||
| 664 | ), |
||
| 665 | 'handler' => array( |
||
| 666 | 'engine' => 'DatabaseSession', |
||
| 667 | 'model' => 'Session' |
||
| 668 | ) |
||
| 669 | ) |
||
| 670 | ); |
||
| 671 | if (isset($defaults[$name])) { |
||
| 672 | return $defaults[$name]; |
||
| 673 | } |
||
| 674 | return false; |
||
| 675 | } |
||
| 676 | |||
| 677 | /**
|
||
| 678 | * Helper method to start a session
|
||
| 679 | *
|
||
| 680 | * @return bool Success
|
||
| 681 | */
|
||
| 682 | protected static function _startSession() { |
||
| 683 | static::init();
|
||
| 684 | session_write_close(); |
||
| 685 | static::_configureSession();
|
||
| 686 | |||
| 687 | if (headers_sent()) { |
||
| 688 | if (empty($_SESSION)) { |
||
| 689 | $_SESSION = array(); |
||
| 690 | } |
||
| 691 | } else {
|
||
| 692 | // For IE<=8
|
||
| 693 | session_cache_limiter("must-revalidate");
|
||
| 694 | session_start(); |
||
| 695 | } |
||
| 696 | return true; |
||
| 697 | } |
||
| 698 | |||
| 699 | /**
|
||
| 700 | * Helper method to create a new session.
|
||
| 701 | *
|
||
| 702 | * @return void
|
||
| 703 | */
|
||
| 704 | protected static function _checkValid() { |
||
| 705 | $config = static::read('Config'); |
||
| 706 | if ($config) { |
||
| 707 | $sessionConfig = Configure::read('Session'); |
||
| 708 | |||
| 709 | if (static::valid()) { |
||
| 710 | static::write('Config.time', static::$sessionTime); |
||
| 711 | if (isset($sessionConfig['autoRegenerate']) && $sessionConfig['autoRegenerate'] === true) { |
||
| 712 | $check = $config['countdown']; |
||
| 713 | $check -= 1; |
||
| 714 | static::write('Config.countdown', $check); |
||
| 715 | |||
| 716 | if ($check < 1) { |
||
| 717 | static::renew();
|
||
| 718 | static::write('Config.countdown', static::$requestCountdown); |
||
| 719 | } |
||
| 720 | } |
||
| 721 | } else {
|
||
| 722 | $_SESSION = array(); |
||
| 723 | static::destroy();
|
||
| 724 | static::_setError(1, 'Session Highjacking Attempted !!!'); |
||
| 725 | static::_startSession();
|
||
| 726 | static::_writeConfig();
|
||
| 727 | } |
||
| 728 | } else {
|
||
| 729 | static::_writeConfig();
|
||
| 730 | } |
||
| 731 | } |
||
| 732 | |||
| 733 | /**
|
||
| 734 | * Writes configuration variables to the session
|
||
| 735 | *
|
||
| 736 | * @return void
|
||
| 737 | */
|
||
| 738 | protected static function _writeConfig() { |
||
| 739 | static::write('Config.userAgent', static::$_userAgent); |
||
| 740 | static::write('Config.time', static::$sessionTime); |
||
| 741 | static::write('Config.countdown', static::$requestCountdown); |
||
| 742 | } |
||
| 743 | |||
| 744 | /**
|
||
| 745 | * Restarts this session.
|
||
| 746 | *
|
||
| 747 | * @return void
|
||
| 748 | */
|
||
| 749 | public static function renew() { |
||
| 750 | if (session_id() === '') { |
||
| 751 | return;
|
||
| 752 | } |
||
| 753 | if (isset($_COOKIE[session_name()])) { |
||
| 754 | setcookie(Configure::read('Session.cookie'), '', time() - 42000, static::$path); |
||
| 755 | } |
||
| 756 | session_regenerate_id(true);
|
||
| 757 | } |
||
| 758 | |||
| 759 | /**
|
||
| 760 | * Helper method to set an internal error message.
|
||
| 761 | *
|
||
| 762 | * @param int $errorNumber Number of the error
|
||
| 763 | * @param string $errorMessage Description of the error
|
||
| 764 | * @return void
|
||
| 765 | */
|
||
| 766 | protected static function _setError($errorNumber, $errorMessage) { |
||
| 767 | if (static::$error === false) { |
||
| 768 | static::$error = array(); |
||
| 769 | } |
||
| 770 | static::$error[$errorNumber] = $errorMessage; |
||
| 771 | static::$lastError = $errorNumber; |
||
| 772 | } |
||
| 773 | |||
| 774 | } |