179 lines
3.5 KiB
PHP
179 lines
3.5 KiB
PHP
<?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Session database driver.
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*
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* $Id: Database.php 4679 2009-11-10 01:45:52Z isaiah $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2009 Kohana Team
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* @license http://kohanaphp.com/license
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*/
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class Session_Database_Driver implements Session_Driver {
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/*
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CREATE TABLE sessions
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(
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session_id VARCHAR(127) NOT NULL,
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last_activity INT(10) UNSIGNED NOT NULL,
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data TEXT NOT NULL,
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PRIMARY KEY (session_id)
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);
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*/
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// Database settings
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protected $db = 'default';
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protected $table = 'sessions';
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// Encryption
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protected $encrypt;
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// Session settings
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protected $session_id;
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protected $written = FALSE;
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public function __construct()
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{
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// Load configuration
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$config = Kohana::config('session');
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if ( ! empty($config['encryption']))
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{
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// Load encryption
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$this->encrypt = Encrypt::instance();
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}
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if (is_array($config['storage']))
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{
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if ( ! empty($config['storage']['group']))
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{
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// Set the group name
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$this->db = $config['storage']['group'];
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}
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if ( ! empty($config['storage']['table']))
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{
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// Set the table name
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$this->table = $config['storage']['table'];
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}
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}
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Kohana_Log::add('debug', 'Session Database Driver Initialized');
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}
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public function open($path, $name)
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{
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return TRUE;
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}
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public function close()
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{
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return TRUE;
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}
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public function read($id)
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{
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// Load the session
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$query = db::select('data')
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->from($this->table)
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->where('session_id', '=', $id)
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->limit(1)
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->execute($this->db);
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if ($query->count() === 0)
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{
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// No current session
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$this->session_id = NULL;
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return '';
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}
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// Set the current session id
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$this->session_id = $id;
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// Load the data
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$data = $query->current()->data;
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return ($this->encrypt === NULL) ? base64_decode($data) : $this->encrypt->decode($data);
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}
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public function write($id, $data)
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{
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if ( ! Session::$should_save)
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return TRUE;
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$data = array
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(
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'session_id' => $id,
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'last_activity' => time(),
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'data' => ($this->encrypt === NULL) ? base64_encode($data) : $this->encrypt->encode($data)
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);
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if ($this->session_id === NULL)
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{
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// Insert a new session
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$query = db::insert($this->table, $data)
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->execute($this->db);
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}
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elseif ($id === $this->session_id)
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{
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// Do not update the session_id
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unset($data['session_id']);
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// Update the existing session
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$query = db::update($this->table)
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->set($data)
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->where('session_id', '=', $id)
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->execute($this->db);
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}
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else
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{
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// Update the session and id
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$query = db::update($this->table)
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->set($data)
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->where('session_id', '=', $this->session_id)
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->execute($this->db);
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// Set the new session id
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$this->session_id = $id;
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}
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return (bool) $query->count();
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}
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public function destroy($id)
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{
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// Delete the requested session
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db::delete($this->table)
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->where('session_id', '=', $id)
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->execute($this->db);
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// Session id is no longer valid
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$this->session_id = NULL;
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return TRUE;
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}
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public function regenerate()
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{
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// Generate a new session id
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session_regenerate_id();
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// Return new session id
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return session_id();
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}
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public function gc($maxlifetime)
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{
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// Delete all expired sessions
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$query = db::delete($this->table)
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->where('last_activity', '<', time() - $maxlifetime)
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->execute($this->db);
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Kohana_Log::add('debug', 'Session garbage collected: '.$query->count().' row(s) deleted.');
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return TRUE;
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}
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} // End Session Database Driver
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