git.maemo.org Git - speedfreak/blob - Server/system/libraries/drivers/Session/Cache.php

   1 <?php defined('SYSPATH') OR die('No direct access allowed.');
   2 /**
   3  * Session cache driver.
   4  *
   5  * Cache library config goes in the session.storage config entry:
   6  * $config['storage'] = array(
   7  *     'driver' => 'apc',
   8  *     'requests' => 10000
   9  * );
  10  * Lifetime does not need to be set as it is
  11  * overridden by the session expiration setting.
  12  *
  13  * $Id: Cache.php 3769 2008-12-15 00:48:56Z zombor $
  14  *
  15  * @package    Core
  16  * @author     Kohana Team
  17  * @copyright  (c) 2007-2008 Kohana Team
  18  * @license    http://kohanaphp.com/license.html
  19  */
  20 class Session_Cache_Driver implements Session_Driver {
  21
  22         protected $cache;
  23         protected $encrypt;
  24
  25         public function __construct()
  26         {
  27                 // Load Encrypt library
  28                 if (Kohana::config('session.encryption'))
  29                 {
  30                         $this->encrypt = new Encrypt;
  31                 }
  32
  33                 Kohana::log('debug', 'Session Cache Driver Initialized');
  34         }
  35
  36         public function open($path, $name)
  37         {
  38                 $config = Kohana::config('session.storage');
  39
  40                 if (empty($config))
  41                 {
  42                         // Load the default group
  43                         $config = Kohana::config('cache.default');
  44                 }
  45                 elseif (is_string($config))
  46                 {
  47                         $name = $config;
  48
  49                         // Test the config group name
  50                         if (($config = Kohana::config('cache.'.$config)) === NULL)
  51                                 throw new Kohana_Exception('cache.undefined_group', $name);
  52                 }
  53
  54                 $config['lifetime'] = (Kohana::config('session.expiration') == 0) ? 86400 : Kohana::config('session.expiration');
  55                 $this->cache = new Cache($config);
  56
  57                 return is_object($this->cache);
  58         }
  59
  60         public function close()
  61         {
  62                 return TRUE;
  63         }
  64
  65         public function read($id)
  66         {
  67                 $id = 'session_'.$id;
  68                 if ($data = $this->cache->get($id))
  69                 {
  70                         return Kohana::config('session.encryption') ? $this->encrypt->decode($data) : $data;
  71                 }
  72
  73                 // Return value must be string, NOT a boolean
  74                 return '';
  75         }
  76
  77         public function write($id, $data)
  78         {
  79                 $id = 'session_'.$id;
  80                 $data = Kohana::config('session.encryption') ? $this->encrypt->encode($data) : $data;
  81
  82                 return $this->cache->set($id, $data);
  83         }
  84
  85         public function destroy($id)
  86         {
  87                 $id = 'session_'.$id;
  88                 return $this->cache->delete($id);
  89         }
  90
  91         public function regenerate()
  92         {
  93                 session_regenerate_id(TRUE);
  94
  95                 // Return new session id
  96                 return session_id();
  97         }
  98
  99         public function gc($maxlifetime)
 100         {
 101                 // Just return, caches are automatically cleaned up
 102                 return TRUE;
 103         }
 104
 105 } // End Session Cache Driver