529 Zeilen
16 KiB
PHP
529 Zeilen
16 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Session
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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* @since Preview Release 0.2
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*/
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/**
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* @see Zend_Session
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*/
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require_once 'Zend/Session.php';
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/**
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* @see Zend_Session_Abstract
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*/
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require_once 'Zend/Session/Abstract.php';
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/**
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* Zend_Session_Namespace
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*
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* @category Zend
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* @package Zend_Session
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Session_Namespace extends Zend_Session_Abstract implements IteratorAggregate
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{
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/**
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* used as option to constructor to prevent additional instances to the same namespace
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*/
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const SINGLE_INSTANCE = true;
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/**
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* Namespace - which namespace this instance of zend-session is saving-to/getting-from
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*
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* @var string
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*/
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protected $_namespace = "Default";
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/**
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* Namespace locking mechanism
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*
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* @var array
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*/
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protected static $_namespaceLocks = array();
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/**
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* Single instance namespace array to ensure data security.
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*
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* @var array
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*/
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protected static $_singleInstances = array();
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/**
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* resetSingleInstance()
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*
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* @param string $namespaceName
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* @return null
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*/
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public static function resetSingleInstance($namespaceName = null)
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{
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if ($namespaceName != null) {
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if (array_key_exists($namespaceName, self::$_singleInstances)) {
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unset(self::$_singleInstances[$namespaceName]);
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}
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return;
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}
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self::$_singleInstances = array();
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return;
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}
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/**
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* __construct() - Returns an instance object bound to a particular, isolated section
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* of the session, identified by $namespace name (defaulting to 'Default').
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* The optional argument $singleInstance will prevent construction of additional
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* instance objects acting as accessors to this $namespace.
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*
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* @param string $namespace - programmatic name of the requested namespace
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* @param bool $singleInstance - prevent creation of additional accessor instance objects for this namespace
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* @return void
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*/
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public function __construct($namespace = 'Default', $singleInstance = false)
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{
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if ($namespace === '') {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('Session namespace must be a non-empty string.');
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}
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if ($namespace[0] == "_") {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('Session namespace must not start with an underscore.');
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}
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if (preg_match('#(^[0-9])#i', $namespace[0])) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('Session namespace must not start with a number.');
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}
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if (isset(self::$_singleInstances[$namespace])) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception("A session namespace object already exists for this namespace ('$namespace'), and no additional accessors (session namespace objects) for this namespace are permitted.");
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}
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if ($singleInstance === true) {
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self::$_singleInstances[$namespace] = true;
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}
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$this->_namespace = $namespace;
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// Process metadata specific only to this namespace.
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Zend_Session::start(true); // attempt auto-start (throws exception if strict option set)
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if (self::$_readable === false) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception(self::_THROW_NOT_READABLE_MSG);
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}
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if (!isset($_SESSION['__ZF'])) {
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return; // no further processing needed
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}
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// do not allow write access to namespaces, after stop() or writeClose()
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if (parent::$_writable === true) {
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if (isset($_SESSION['__ZF'][$namespace])) {
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// Expire Namespace by Namespace Hop (ENNH)
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if (isset($_SESSION['__ZF'][$namespace]['ENNH'])) {
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$_SESSION['__ZF'][$namespace]['ENNH']--;
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if ($_SESSION['__ZF'][$namespace]['ENNH'] === 0) {
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if (isset($_SESSION[$namespace])) {
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self::$_expiringData[$namespace] = $_SESSION[$namespace];
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unset($_SESSION[$namespace]);
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}
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unset($_SESSION['__ZF'][$namespace]);
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}
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}
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// Expire Namespace Variables by Namespace Hop (ENVNH)
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if (isset($_SESSION['__ZF'][$namespace]['ENVNH'])) {
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foreach ($_SESSION['__ZF'][$namespace]['ENVNH'] as $variable => $hops) {
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$_SESSION['__ZF'][$namespace]['ENVNH'][$variable]--;
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if ($_SESSION['__ZF'][$namespace]['ENVNH'][$variable] === 0) {
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if (isset($_SESSION[$namespace][$variable])) {
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self::$_expiringData[$namespace][$variable] = $_SESSION[$namespace][$variable];
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unset($_SESSION[$namespace][$variable]);
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}
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unset($_SESSION['__ZF'][$namespace]['ENVNH'][$variable]);
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}
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}
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if(empty($_SESSION['__ZF'][$namespace]['ENVNH'])) {
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unset($_SESSION['__ZF'][$namespace]['ENVNH']);
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}
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}
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}
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if (empty($_SESSION['__ZF'][$namespace])) {
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unset($_SESSION['__ZF'][$namespace]);
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}
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if (empty($_SESSION['__ZF'])) {
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unset($_SESSION['__ZF']);
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}
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}
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}
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/**
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* getIterator() - return an iteratable object for use in foreach and the like,
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* this completes the IteratorAggregate interface
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*
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* @return ArrayObject - iteratable container of the namespace contents
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*/
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public function getIterator()
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{
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return new ArrayObject(parent::_namespaceGetAll($this->_namespace));
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}
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/**
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* lock() - mark a session/namespace as readonly
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*
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* @return void
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*/
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public function lock()
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{
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self::$_namespaceLocks[$this->_namespace] = true;
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}
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/**
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* unlock() - unmark a session/namespace to enable read & write
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*
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* @return void
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*/
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public function unlock()
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{
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unset(self::$_namespaceLocks[$this->_namespace]);
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}
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/**
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* unlockAll() - unmark all session/namespaces to enable read & write
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*
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* @return void
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*/
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public static function unlockAll()
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{
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self::$_namespaceLocks = array();
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}
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/**
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* isLocked() - return lock status, true if, and only if, read-only
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*
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* @return bool
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*/
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public function isLocked()
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{
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return isset(self::$_namespaceLocks[$this->_namespace]);
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}
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/**
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* unsetAll() - unset all variables in this namespace
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*
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* @return true
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*/
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public function unsetAll()
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{
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return parent::_namespaceUnset($this->_namespace);
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}
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/**
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* __get() - method to get a variable in this object's current namespace
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*
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* @param string $name - programmatic name of a key, in a <key,value> pair in the current namespace
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* @return mixed
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*/
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public function & __get($name)
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{
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if ($name === '') {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception("The '$name' key must be a non-empty string");
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}
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return parent::_namespaceGet($this->_namespace, $name);
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}
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/**
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* __set() - method to set a variable/value in this object's namespace
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*
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* @param string $name - programmatic name of a key, in a <key,value> pair in the current namespace
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* @param mixed $value - value in the <key,value> pair to assign to the $name key
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* @throws Zend_Session_Exception
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* @return true
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*/
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public function __set($name, $value)
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{
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if (isset(self::$_namespaceLocks[$this->_namespace])) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('This session/namespace has been marked as read-only.');
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}
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if ($name === '') {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception("The '$name' key must be a non-empty string");
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}
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if (parent::$_writable === false) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception(parent::_THROW_NOT_WRITABLE_MSG);
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}
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$name = (string) $name;
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$_SESSION[$this->_namespace][$name] = $value;
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}
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/**
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* apply() - enables applying user-selected function, such as array_merge() to the namespace
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* Parameters following the $callback argument are passed to the callback function.
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* Caveat: ignores members expiring now.
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*
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* Example:
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* $namespace->apply('array_merge', array('tree' => 'apple', 'fruit' => 'peach'), array('flower' => 'rose'));
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* $namespace->apply('count');
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*
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* @param string|array $callback - callback function
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*/
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public function apply($callback)
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{
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$arg_list = func_get_args();
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$arg_list[0] = $_SESSION[$this->_namespace];
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return call_user_func_array($callback, $arg_list);
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}
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/**
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* applySet() - enables applying user-selected function, and sets entire namespace to the result
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* Result of $callback must be an array.
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* Parameters following the $callback argument are passed to the callback function.
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* Caveat: ignores members expiring now.
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*
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* Example:
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* $namespace->applySet('array_merge', array('tree' => 'apple', 'fruit' => 'peach'), array('flower' => 'rose'));
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*
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* @param string|array $callback - callback function
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*/
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public function applySet($callback)
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{
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$arg_list = func_get_args();
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$arg_list[0] = $_SESSION[$this->_namespace];
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$result = call_user_func_array($callback, $arg_list);
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if (!is_array($result)) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('Result must be an array. Got: ' . gettype($result));
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}
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$_SESSION[$this->_namespace] = $result;
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return $result;
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}
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/**
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* __isset() - determine if a variable in this object's namespace is set
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*
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* @param string $name - programmatic name of a key, in a <key,value> pair in the current namespace
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* @return bool
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*/
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public function __isset($name)
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{
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if ($name === '') {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception("The '$name' key must be a non-empty string");
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}
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return parent::_namespaceIsset($this->_namespace, $name);
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}
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/**
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* __unset() - unset a variable in this object's namespace.
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*
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* @param string $name - programmatic name of a key, in a <key,value> pair in the current namespace
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* @return true
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*/
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public function __unset($name)
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{
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if ($name === '') {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception("The '$name' key must be a non-empty string");
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}
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return parent::_namespaceUnset($this->_namespace, $name);
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}
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/**
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* setExpirationSeconds() - expire the namespace, or specific variables after a specified
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* number of seconds
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*
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* @param int $seconds - expires in this many seconds
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* @param mixed $variables - OPTIONAL list of variables to expire (defaults to all)
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* @throws Zend_Session_Exception
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* @return void
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*/
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public function setExpirationSeconds($seconds, $variables = null)
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{
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if (parent::$_writable === false) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception(parent::_THROW_NOT_WRITABLE_MSG);
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}
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if ($seconds <= 0) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('Seconds must be positive.');
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}
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if ($variables === null) {
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// apply expiration to entire namespace
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$_SESSION['__ZF'][$this->_namespace]['ENT'] = time() + $seconds;
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} else {
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if (is_string($variables)) {
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$variables = array($variables);
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}
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foreach ($variables as $variable) {
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if (!empty($variable)) {
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$_SESSION['__ZF'][$this->_namespace]['ENVT'][$variable] = time() + $seconds;
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}
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}
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}
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}
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/**
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* setExpirationHops() - expire the namespace, or specific variables after a specified
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* number of page hops
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*
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* @param int $hops - how many "hops" (number of subsequent requests) before expiring
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* @param mixed $variables - OPTIONAL list of variables to expire (defaults to all)
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* @param boolean $hopCountOnUsageOnly - OPTIONAL if set, only count a hop/request if this namespace is used
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* @throws Zend_Session_Exception
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* @return void
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*/
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public function setExpirationHops($hops, $variables = null, $hopCountOnUsageOnly = false)
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{
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if (parent::$_writable === false) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception(parent::_THROW_NOT_WRITABLE_MSG);
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}
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if ($hops <= 0) {
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/**
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* @see Zend_Session_Exception
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*/
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require_once 'Zend/Session/Exception.php';
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throw new Zend_Session_Exception('Hops must be positive number.');
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}
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if ($variables === null) {
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// apply expiration to entire namespace
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if ($hopCountOnUsageOnly === false) {
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$_SESSION['__ZF'][$this->_namespace]['ENGH'] = $hops;
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} else {
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$_SESSION['__ZF'][$this->_namespace]['ENNH'] = $hops;
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}
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} else {
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if (is_string($variables)) {
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$variables = array($variables);
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}
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foreach ($variables as $variable) {
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if (!empty($variable)) {
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if ($hopCountOnUsageOnly === false) {
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$_SESSION['__ZF'][$this->_namespace]['ENVGH'][$variable] = $hops;
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} else {
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$_SESSION['__ZF'][$this->_namespace]['ENVNH'][$variable] = $hops;
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}
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}
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}
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}
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}
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/**
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* Returns the namespace name
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*
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* @return string
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*/
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public function getNamespace()
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{
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return $this->_namespace;
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}
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}
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