File indexing completed on 2024-05-12 06:02:31

 <?php
 
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Feed
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * @see Zend_Feed_Element
  */
 // require_once 'Zend/Feed/Element.php';
 
 /** @see Zend_Xml_Security */
 // require_once 'Zend/Xml/Security.php';
 
 /**
  * The Zend_Feed_Abstract class is an abstract class representing feeds.
  *
  * Zend_Feed_Abstract implements two core PHP 5 interfaces: ArrayAccess and
  * Iterator. In both cases the collection being treated as an array is
  * considered to be the entry collection, such that iterating over the
  * feed takes you through each of the feed.s entries.
  *
  * @category   Zend
  * @package    Zend_Feed
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 abstract class Zend_Feed_Abstract extends Zend_Feed_Element implements Iterator, Countable
 {
     /**
      * Current index on the collection of feed entries for the
      * Iterator implementation.
      *
      * @var integer
      */
     protected $_entryIndex = 0;
 
     /**
      * Cache of feed entries.
      *
      * @var array
      */
     protected $_entries;
 
     /**
      * Feed constructor
      *
      * The Zend_Feed_Abstract constructor takes the URI of a feed or a
      * feed represented as a string and loads it as XML.
      *
      * @param  string $uri The full URI of the feed to load, or NULL if not retrieved via HTTP or as an array.
      * @param  string $string The feed as a string, or NULL if retrieved via HTTP or as an array.
      * @param  Zend_Feed_Builder_Interface $builder The feed as a builder instance or NULL if retrieved as a string or via HTTP.
      * @return void
      * @throws Zend_Feed_Exception If loading the feed failed.
      */
     public function __construct($uri = null, $string = null, Zend_Feed_Builder_Interface $builder = null)
     {
         if ($uri !== null) {
             // Retrieve the feed via HTTP
             $client = Zend_Feed::getHttpClient();
             $client->setUri($uri);
             $response = $client->request('GET');
             if ($response->getStatus() !== 200) {
                 /**
                  * @see Zend_Feed_Exception
                  */
                 // require_once 'Zend/Feed/Exception.php';
                 throw new Zend_Feed_Exception('Feed failed to load, got response code ' . $response->getStatus() . '; request: ' . $client->getLastRequest() . "\nresponse: " . $response->asString());
             }
             $this->_element = $this->_importFeedFromString($response->getBody());
             $this->__wakeup();
         } elseif ($string !== null) {
             // Retrieve the feed from $string
             $this->_element = $string;
             $this->__wakeup();
         } else {
             // Generate the feed from the array
             $header = $builder->getHeader();
             $this->_element = new DOMDocument('1.0', $header['charset']);
             $root = $this->_mapFeedHeaders($header);
             $this->_mapFeedEntries($root, $builder->getEntries());
             $this->_element = $root;
             $this->_buildEntryCache();
         }
     }
 
 
     /**
      * Load the feed as an XML DOMDocument object
      *
      * @return void
      * @throws Zend_Feed_Exception
      */
     public function __wakeup()
     {
         @ini_set('track_errors', 1);
         $doc = new DOMDocument;
         $doc = @Zend_Xml_Security::scan($this->_element, $doc);
         @ini_restore('track_errors');
 
         if (!$doc) {
             // prevent the class to generate an undefined variable notice (ZF-2590)
             if (!isset($php_errormsg)) {
                 if (function_exists('xdebug_is_enabled')) {
                     $php_errormsg = '(error message not available, when XDebug is running)';
                 } else {
                     $php_errormsg = '(error message not available)';
                 }
             }
 
             /**
              * @see Zend_Feed_Exception
              */
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception("DOMDocument cannot parse XML: $php_errormsg");
         }
 
         $this->_element = $doc;
     }
 
 
     /**
      * Prepare for serialiation
      *
      * @return array
      */
     public function __sleep()
     {
         $this->_element = $this->saveXML();
 
         return array('_element');
     }
 
 
     /**
      * Cache the individual feed elements so they don't need to be
      * searched for on every operation.
      *
      * @return void
      */
     protected function _buildEntryCache()
     {
         $this->_entries = array();
         foreach ($this->_element->childNodes as $child) {
             if ($child->localName == $this->_entryElementName) {
                 $this->_entries[] = $child;
             }
         }
     }
 
 
     /**
      * Get the number of entries in this feed object.
      *
      * @return integer Entry count.
      */
     public function count()
     {
         return count($this->_entries);
     }
 
 
     /**
      * Required by the Iterator interface.
      *
      * @return void
      */
     public function rewind()
     {
         $this->_entryIndex = 0;
     }
 
 
     /**
      * Required by the Iterator interface.
      *
      * @return mixed The current row, or null if no rows.
      */
     public function current()
     {
         return new $this->_entryClassName(
             null,
             $this->_entries[$this->_entryIndex]);
     }
 
 
     /**
      * Required by the Iterator interface.
      *
      * @return mixed The current row number (starts at 0), or NULL if no rows
      */
     public function key()
     {
         return $this->_entryIndex;
     }
 
 
     /**
      * Required by the Iterator interface.
      *
      * @return mixed The next row, or null if no more rows.
      */
     public function next()
     {
         ++$this->_entryIndex;
     }
 
 
     /**
      * Required by the Iterator interface.
      *
      * @return boolean Whether the iteration is valid
      */
     public function valid()
     {
         return 0 <= $this->_entryIndex && $this->_entryIndex < $this->count();
     }
 
     /**
      * Generate the header of the feed when working in write mode
      *
      * @param  array $array the data to use
      * @return DOMElement root node
      */
     abstract protected function _mapFeedHeaders($array);
 
     /**
      * Generate the entries of the feed when working in write mode
      *
      * @param  DOMElement $root the root node to use
      * @param  array $array the data to use
      * @return DOMElement root node
      */
     abstract protected function _mapFeedEntries(DOMElement $root, $array);
 
     /**
      * Send feed to a http client with the correct header
      *
      * @throws Zend_Feed_Exception if headers have already been sent
      * @return void
      */
     abstract public function send();
 
     /**
      * Import a feed from a string
      *
      * Protects against XXE attack vectors.
      * 
      * @param  string $feed 
      * @return string
      * @throws Zend_Feed_Exception on detection of an XXE vector
      */
     protected function _importFeedFromString($feed)
     {
         if (trim($feed) == '') {
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception('Remote feed being imported'
             . ' is an Empty string or comes from an empty HTTP response');
         }
         $doc = new DOMDocument;
         $doc = Zend_Xml_Security::scan($feed, $doc);
 
         if (!$doc) {
             // prevent the class to generate an undefined variable notice (ZF-2590)
             // Build error message
             $error = libxml_get_last_error();
             if ($error && $error->message) {
                 $errormsg = "DOMDocument cannot parse XML: {$error->message}";
             } else {
                 $errormsg = "DOMDocument cannot parse XML";
             }
 
 
             /**
              * @see Zend_Feed_Exception
              */
             // require_once 'Zend/Feed/Exception.php';
             throw new Zend_Feed_Exception($errormsg);
         }
 
         return $doc->saveXML($doc->documentElement);
     }
 }