8398c9048d
code was modified slightly, so the code differs from the original downloadable 1.9.5 version
692 lines
22 KiB
PHP
692 lines
22 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_Feed_Reader
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* @copyright Copyright (c) 2005-2009 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: Reader.php 17391 2009-08-05 11:27:52Z padraic $
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*/
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/**
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* @see Zend_Feed
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*/
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require_once 'Zend/Feed.php';
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/**
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* @see Zend_Feed_Reader_Feed_Rss
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*/
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require_once 'Zend/Feed/Reader/Feed/Rss.php';
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/**
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* @see Zend_Feed_Reader_Feed_Atom
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*/
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require_once 'Zend/Feed/Reader/Feed/Atom.php';
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/**
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* @category Zend
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* @package Zend_Feed_Reader
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* @copyright Copyright (c) 2005-2009 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_Feed_Reader
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{
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/**
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* Namespace constants
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*/
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const NAMESPACE_ATOM_03 = 'http://purl.org/atom/ns#';
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const NAMESPACE_ATOM_10 = 'http://www.w3.org/2005/Atom';
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const NAMESPACE_RDF = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
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const NAMESPACE_RSS_090 = 'http://my.netscape.com/rdf/simple/0.9/';
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const NAMESPACE_RSS_10 = 'http://purl.org/rss/1.0/';
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/**
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* Feed type constants
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*/
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const TYPE_ANY = 'any';
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const TYPE_ATOM_03 = 'atom-03';
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const TYPE_ATOM_10 = 'atom-10';
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const TYPE_ATOM_ANY = 'atom';
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const TYPE_RSS_090 = 'rss-090';
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const TYPE_RSS_091 = 'rss-091';
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const TYPE_RSS_091_NETSCAPE = 'rss-091n';
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const TYPE_RSS_091_USERLAND = 'rss-091u';
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const TYPE_RSS_092 = 'rss-092';
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const TYPE_RSS_093 = 'rss-093';
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const TYPE_RSS_094 = 'rss-094';
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const TYPE_RSS_10 = 'rss-10';
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const TYPE_RSS_20 = 'rss-20';
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const TYPE_RSS_ANY = 'rss';
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/**
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* Cache instance
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*
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* @var Zend_Cache_Core
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*/
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protected static $_cache = null;
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/**
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* HTTP client object to use for retrieving feeds
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*
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* @var Zend_Http_Client
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*/
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protected static $_httpClient = null;
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/**
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* Override HTTP PUT and DELETE request methods?
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*
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* @var boolean
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*/
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protected static $_httpMethodOverride = false;
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protected static $_httpConditionalGet = false;
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protected static $_pluginLoader = null;
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protected static $_prefixPaths = array();
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protected static $_extensions = array(
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'feed' => array(
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'DublinCore_Feed',
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'Atom_Feed'
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),
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'entry' => array(
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'Content_Entry',
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'DublinCore_Entry',
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'Atom_Entry'
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),
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'core' => array(
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'DublinCore_Feed',
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'Atom_Feed',
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'Content_Entry',
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'DublinCore_Entry',
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'Atom_Entry'
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)
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);
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/**
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* Get the Feed cache
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*
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* @return Zend_Cache_Core
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*/
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public static function getCache()
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{
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return self::$_cache;
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}
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/**
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* Set the feed cache
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*
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* @param Zend_Cache_Core $cache
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* @return void
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*/
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public static function setCache(Zend_Cache_Core $cache)
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{
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self::$_cache = $cache;
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}
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/**
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* Set the HTTP client instance
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*
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* Sets the HTTP client object to use for retrieving the feeds.
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*
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* @param Zend_Http_Client $httpClient
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* @return void
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*/
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public static function setHttpClient(Zend_Http_Client $httpClient)
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{
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self::$_httpClient = $httpClient;
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}
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/**
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* Gets the HTTP client object. If none is set, a new Zend_Http_Client will be used.
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*
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* @return Zend_Http_Client_Abstract
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*/
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public static function getHttpClient()
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{
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if (!self::$_httpClient instanceof Zend_Http_Client) {
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/**
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* @see Zend_Http_Client
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*/
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require_once 'Zend/Http/Client.php';
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self::$_httpClient = new Zend_Http_Client();
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}
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return self::$_httpClient;
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}
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/**
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* Toggle using POST instead of PUT and DELETE HTTP methods
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*
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* Some feed implementations do not accept PUT and DELETE HTTP
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* methods, or they can't be used because of proxies or other
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* measures. This allows turning on using POST where PUT and
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* DELETE would normally be used; in addition, an
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* X-Method-Override header will be sent with a value of PUT or
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* DELETE as appropriate.
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*
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* @param boolean $override Whether to override PUT and DELETE.
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* @return void
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*/
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public static function setHttpMethodOverride($override = true)
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{
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self::$_httpMethodOverride = $override;
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}
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/**
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* Get the HTTP override state
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*
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* @return boolean
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*/
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public static function getHttpMethodOverride()
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{
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return self::$_httpMethodOverride;
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}
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/**
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* Set the flag indicating whether or not to use HTTP conditional GET
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*
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* @param bool $bool
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* @return void
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*/
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public static function useHttpConditionalGet($bool = true)
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{
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self::$_httpConditionalGet = $bool;
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}
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/**
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* Import a feed by providing a URL
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*
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* @param string $url The URL to the feed
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* @param string $etag OPTIONAL Last received ETag for this resource
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* @param string $lastModified OPTIONAL Last-Modified value for this resource
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* @return Zend_Feed_Reader_Feed_Interface
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*/
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public static function import($uri, $etag = null, $lastModified = null)
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{
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$cache = self::getCache();
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$feed = null;
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$responseXml = '';
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$client = self::getHttpClient();
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$client->resetParameters();
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$client->setHeaders('If-None-Match', null);
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$client->setHeaders('If-Modified-Since', null);
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$client->setUri($uri);
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$cacheId = 'Zend_Feed_Reader_' . md5($uri);
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if (self::$_httpConditionalGet && $cache) {
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$data = $cache->load($cacheId);
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if ($data) {
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if (is_null($etag)) {
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$etag = $cache->load($cacheId.'_etag');
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}
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if (is_null($lastModified)) {
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$lastModified = $cache->load($cacheId.'_lastmodified');;
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}
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if ($etag) {
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$client->setHeaders('If-None-Match', $etag);
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}
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if ($lastModified) {
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$client->setHeaders('If-Modified-Since', $lastModified);
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}
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}
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$response = $client->request('GET');
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if ($response->getStatus() !== 200 && $response->getStatus() !== 304) {
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Feed failed to load, got response code ' . $response->getStatus());
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}
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if ($response->getStatus() == 304) {
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$responseXml = $data;
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} else {
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$responseXml = $response->getBody();
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$cache->save($responseXml, $cacheId);
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if ($response->getHeader('ETag')) {
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$cache->save($response->getHeader('ETag'), $cacheId.'_etag');
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}
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if ($response->getHeader('Last-Modified')) {
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$cache->save($response->getHeader('Last-Modified'), $cacheId.'_lastmodified');
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}
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}
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return self::importString($responseXml);
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} elseif ($cache) {
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$data = $cache->load($cacheId);
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if ($data !== false) {
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return self::importString($data);
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}
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$response = $client->request('GET');
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if ($response->getStatus() !== 200) {
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Feed failed to load, got response code ' . $response->getStatus());
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}
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$responseXml = $response->getBody();
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$cache->save($responseXml, $cacheId);
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return self::importString($responseXml);
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} else {
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$response = $client->request('GET');
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if ($response->getStatus() !== 200) {
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Feed failed to load, got response code ' . $response->getStatus());
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}
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return self::importString($response->getBody());
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}
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}
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/**
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* Import a feed by providing a Zend_Feed_Abstract object
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*
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* @param Zend_Feed_Abstract $feed A fully instantiated Zend_Feed object
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* @return Zend_Feed_Reader_Feed_Interface
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*/
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public static function importFeed(Zend_Feed_Abstract $feed)
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{
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$dom = $feed->getDOM()->ownerDocument;
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$type = self::detectType($dom);
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self::_registerCoreExtensions();
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if (substr($type, 0, 3) == 'rss') {
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$reader = new Zend_Feed_Reader_Feed_Rss($dom, $type);
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} else {
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$reader = new Zend_Feed_Reader_Feed_Atom($dom, $type);
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}
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return $reader;
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}
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/**
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* Import a feed froma string
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*
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* @param string $string
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* @return Zend_Feed_Reader_Feed_Interface
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*/
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public static function importString($string)
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{
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$libxml_errflag = libxml_use_internal_errors(true);
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$dom = new DOMDocument;
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$status = $dom->loadXML($string);
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libxml_use_internal_errors($libxml_errflag);
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if (!$status) {
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// Build error message
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$error = libxml_get_last_error();
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if ($error && $error->message) {
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$errormsg = "DOMDocument cannot parse XML: {$error->message}";
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} else {
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$errormsg = "DOMDocument cannot parse XML: Please check the XML document's validity";
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}
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception($errormsg);
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}
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$type = self::detectType($dom);
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self::_registerCoreExtensions();
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if (substr($type, 0, 3) == 'rss') {
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$reader = new Zend_Feed_Reader_Feed_Rss($dom, $type);
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} else {
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$reader = new Zend_Feed_Reader_Feed_Atom($dom, $type);
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}
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return $reader;
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}
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/**
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* Imports a feed from a file located at $filename.
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*
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* @param string $filename
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* @throws Zend_Feed_Exception
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* @return Zend_Feed_Reader_FeedInterface
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*/
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public static function importFile($filename)
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{
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@ini_set('track_errors', 1);
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$feed = @file_get_contents($filename);
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@ini_restore('track_errors');
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if ($feed === false) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception("File could not be loaded: $php_errormsg");
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}
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return self::importString($feed);
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}
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public static function findFeedLinks($uri)
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{
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// Get the HTTP response from $uri and save the contents
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$client = self::getHttpClient();
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$client->setUri($uri);
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$response = $client->request();
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if ($response->getStatus() !== 200) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception("Failed to access $uri, got response code " . $response->getStatus());
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}
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$responseHtml = $response->getBody();
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@ini_set('track_errors', 1);
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$dom = new DOMDocument;
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$status = @$dom->loadHTML($responseHtml);
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@ini_restore('track_errors');
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if (!$status) {
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if (!isset($php_errormsg)) {
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if (function_exists('xdebug_is_enabled')) {
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$php_errormsg = '(error message not available, when XDebug is running)';
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} else {
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$php_errormsg = '(error message not available)';
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}
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}
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception("DOMDocument cannot parse XML: $php_errormsg");
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}
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$feedLinks = new stdClass;
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$links = $dom->getElementsByTagName('link');
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foreach ($links as $link) {
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if (strtolower($link->getAttribute('rel')) !== 'alternate'
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|| !$link->getAttribute('type') || !$link->getAttribute('href')) {
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continue;
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}
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if (!isset($feedLinks->rss) && $link->getAttribute('type') == 'application/rss+xml') {
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$feedLinks->rss = $link->getAttribute('href');
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} elseif(!isset($feedLinks->atom) && $link->getAttribute('type') == 'application/atom+xml') {
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$feedLinks->atom = $link->getAttribute('href');
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} elseif(!isset($feedLinks->rdf) && $link->getAttribute('type') == 'application/rdf+xml') {
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$feedLinks->rdf = $link->getAttribute('href');
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}
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if (isset($feedLinks->rss) && isset($feedLinks->atom) && isset($feedLinks->rdf)) {
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break;
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}
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}
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return $feedLinks;
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}
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/**
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* Detect the feed type of the provided feed
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*
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* @param Zend_Feed_Abstract $feed A fully instantiated Zend_Feed object
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* @return string
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*/
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public static function detectType($feed)
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{
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if ($feed instanceof Zend_Feed_Reader_FeedInterface) {
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$dom = $feed->getDomDocument();
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} elseif($feed instanceof DomDocument) {
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$dom = $feed;
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} elseif(is_string($feed) && !empty($feed)) {
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@ini_set('track_errors', 1);
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$dom = new DOMDocument;
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$status = @$doc->loadXML($string);
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@ini_restore('track_errors');
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if (!$status) {
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if (!isset($php_errormsg)) {
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if (function_exists('xdebug_is_enabled')) {
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$php_errormsg = '(error message not available, when XDebug is running)';
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} else {
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$php_errormsg = '(error message not available)';
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}
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}
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception("DOMDocument cannot parse XML: $php_errormsg");
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}
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} else {
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Invalid object/scalar provided: must be of type Zend_Feed_Reader_FeedInterface, DomDocument or string');
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}
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$xpath = new DOMXPath($dom);
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if ($xpath->query('/rss')->length) {
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$type = self::TYPE_RSS_ANY;
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$version = $xpath->evaluate('string(/rss/@version)');
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if (strlen($version) > 0) {
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switch($version) {
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case '2.0':
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$type = self::TYPE_RSS_20;
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break;
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case '0.94':
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$type = self::TYPE_RSS_094;
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break;
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case '0.93':
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$type = self::TYPE_RSS_093;
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break;
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case '0.92':
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$type = self::TYPE_RSS_092;
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break;
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case '0.91':
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$type = self::TYPE_RSS_091;
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break;
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}
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}
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return $type;
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}
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$xpath->registerNamespace('rdf', self::NAMESPACE_RDF);
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if ($xpath->query('/rdf:RDF')->length) {
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$xpath->registerNamespace('rss', self::NAMESPACE_RSS_10);
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if ($xpath->query('/rdf:RDF/rss:channel')->length
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|| $xpath->query('/rdf:RDF/rss:image')->length
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|| $xpath->query('/rdf:RDF/rss:item')->length
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|| $xpath->query('/rdf:RDF/rss:textinput')->length
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) {
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return self::TYPE_RSS_10;
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}
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$xpath->registerNamespace('rss', self::NAMESPACE_RSS_090);
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if ($xpath->query('/rdf:RDF/rss:channel')->length
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|| $xpath->query('/rdf:RDF/rss:image')->length
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|| $xpath->query('/rdf:RDF/rss:item')->length
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|| $xpath->query('/rdf:RDF/rss:textinput')->length
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) {
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return self::TYPE_RSS_090;
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}
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}
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$type = self::TYPE_ATOM_ANY;
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$xpath->registerNamespace('atom', self::NAMESPACE_ATOM_10);
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if ($xpath->query('//atom:feed')->length) {
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return self::TYPE_ATOM_10;
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}
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$xpath->registerNamespace('atom', self::NAMESPACE_ATOM_03);
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if ($xpath->query('//atom:feed')->length) {
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return self::TYPE_ATOM_03;
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}
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return self::TYPE_ANY;
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}
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/**
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* Set plugin loader for use with Extensions
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*
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* @param Zend_Loader_PluginLoader_Interface $loader
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*/
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public static function setPluginLoader(Zend_Loader_PluginLoader_Interface $loader)
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{
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self::$_pluginLoader = $loader;
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}
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|
|
/**
|
|
* Get plugin loader for use with Extensions
|
|
*
|
|
* @return Zend_Loader_PluginLoader_Interface $loader
|
|
*/
|
|
public static function getPluginLoader()
|
|
{
|
|
if (!isset(self::$_pluginLoader)) {
|
|
require_once 'Zend/Loader/PluginLoader.php';
|
|
self::$_pluginLoader = new Zend_Loader_PluginLoader(array(
|
|
'Zend_Feed_Reader_Extension_' => 'Zend/Feed/Reader/Extension/',
|
|
));
|
|
}
|
|
return self::$_pluginLoader;
|
|
}
|
|
|
|
/**
|
|
* Add prefix path for loading Extensions
|
|
*
|
|
* @param string $prefix
|
|
* @param string $path
|
|
* @return void
|
|
*/
|
|
public static function addPrefixPath($prefix, $path)
|
|
{
|
|
$prefix = rtrim($prefix, '_');
|
|
$path = rtrim($path, DIRECTORY_SEPARATOR);
|
|
self::getPluginLoader()->addPrefixPath($prefix, $path);
|
|
}
|
|
|
|
/**
|
|
* Add multiple Extension prefix paths at once
|
|
*
|
|
* @param array $spec
|
|
* @return void
|
|
*/
|
|
public static function addPrefixPaths(array $spec)
|
|
{
|
|
if (isset($spec['prefix']) && isset($spec['path'])) {
|
|
self::addPrefixPath($spec['prefix'], $spec['path']);
|
|
}
|
|
foreach ($spec as $prefixPath) {
|
|
if (isset($prefixPath['prefix']) && isset($prefixPath['path'])) {
|
|
self::addPrefixPath($prefixPath['prefix'], $prefixPath['path']);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Register an Extension by name
|
|
*
|
|
* @param string $name
|
|
* @return void
|
|
* @throws Zend_Feed_Exception if unable to resolve Extension class
|
|
*/
|
|
public static function registerExtension($name)
|
|
{
|
|
$feedName = $name . '_Feed';
|
|
$entryName = $name . '_Entry';
|
|
if (self::isRegistered($name)) {
|
|
if (self::getPluginLoader()->isLoaded($feedName) ||
|
|
self::getPluginLoader()->isLoaded($entryName)) {
|
|
return;
|
|
}
|
|
}
|
|
try {
|
|
self::getPluginLoader()->load($feedName);
|
|
self::$_extensions['feed'][] = $feedName;
|
|
} catch (Zend_Loader_PluginLoader_Exception $e) {
|
|
}
|
|
try {
|
|
self::getPluginLoader()->load($entryName);
|
|
self::$_extensions['entry'][] = $entryName;
|
|
} catch (Zend_Loader_PluginLoader_Exception $e) {
|
|
}
|
|
if (!self::getPluginLoader()->isLoaded($feedName)
|
|
&& !self::getPluginLoader()->isLoaded($entryName)
|
|
) {
|
|
require_once 'Zend/Feed/Exception.php';
|
|
throw new Zend_Feed_Exception('Could not load extension: ' . $name
|
|
. 'using Plugin Loader. Check prefix paths are configured and extension exists.');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Is a given named Extension registered?
|
|
*
|
|
* @param string $extensionName
|
|
* @return boolean
|
|
*/
|
|
public static function isRegistered($extensionName)
|
|
{
|
|
$feedName = $extensionName . '_Feed';
|
|
$entryName = $extensionName . '_Entry';
|
|
if (in_array($feedName, self::$_extensions['feed'])
|
|
|| in_array($entryName, self::$_extensions['entry'])
|
|
) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get a list of extensions
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function getExtensions()
|
|
{
|
|
return self::$_extensions;
|
|
}
|
|
|
|
/**
|
|
* Reset class state to defaults
|
|
*
|
|
* @return void
|
|
*/
|
|
public static function reset()
|
|
{
|
|
self::$_cache = null;
|
|
self::$_httpClient = null;
|
|
self::$_httpMethodOverride = false;
|
|
self::$_httpConditionalGet = false;
|
|
self::$_pluginLoader = null;
|
|
self::$_prefixPaths = array();
|
|
self::$_extensions = array(
|
|
'feed' => array(
|
|
'DublinCore_Feed',
|
|
'Atom_Feed'
|
|
),
|
|
'entry' => array(
|
|
'Content_Entry',
|
|
'DublinCore_Entry',
|
|
'Atom_Entry'
|
|
),
|
|
'core' => array(
|
|
'DublinCore_Feed',
|
|
'Atom_Feed',
|
|
'Content_Entry',
|
|
'DublinCore_Entry',
|
|
'Atom_Entry'
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Register core (default) extensions
|
|
*
|
|
* @return void
|
|
*/
|
|
protected static function _registerCoreExtensions()
|
|
{
|
|
self::registerExtension('DublinCore');
|
|
self::registerExtension('Content');
|
|
self::registerExtension('Atom');
|
|
self::registerExtension('Slash');
|
|
self::registerExtension('WellFormedWeb');
|
|
self::registerExtension('Thread');
|
|
self::registerExtension('Podcast');
|
|
}
|
|
}
|