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372 lines
11 KiB
372 lines
11 KiB
<?php |
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/** |
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* SimplePie |
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* |
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* A PHP-Based RSS and Atom Feed Framework. |
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* Takes the hard work out of managing a complete RSS/Atom solution. |
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* |
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* Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without modification, are |
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* permitted provided that the following conditions are met: |
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* |
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* * Redistributions of source code must retain the above copyright notice, this list of |
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* conditions and the following disclaimer. |
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* |
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* * Redistributions in binary form must reproduce the above copyright notice, this list |
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* of conditions and the following disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* * Neither the name of the SimplePie Team nor the names of its contributors may be used |
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* to endorse or promote products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS |
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS |
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* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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* @package SimplePie |
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* @version 1.4-dev |
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* @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue |
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* @author Ryan Parman |
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* @author Geoffrey Sneddon |
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* @author Ryan McCue |
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* @link http://simplepie.org/ SimplePie |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License |
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*/ |
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/** |
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* Used for feed auto-discovery |
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* |
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* |
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* This class can be overloaded with {@see SimplePie::set_locator_class()} |
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* |
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* @package SimplePie |
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*/ |
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class SimplePie_Locator |
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{ |
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var $useragent; |
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var $timeout; |
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var $file; |
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var $local = array(); |
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var $elsewhere = array(); |
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var $cached_entities = array(); |
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var $http_base; |
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var $base; |
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var $base_location = 0; |
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var $checked_feeds = 0; |
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var $max_checked_feeds = 10; |
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protected $registry; |
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public function __construct(SimplePie_File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10) |
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{ |
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$this->file = $file; |
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$this->useragent = $useragent; |
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$this->timeout = $timeout; |
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$this->max_checked_feeds = $max_checked_feeds; |
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if (class_exists('DOMDocument')) |
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{ |
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$this->dom = new DOMDocument(); |
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set_error_handler(array('SimplePie_Misc', 'silence_errors')); |
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$this->dom->loadHTML($this->file->body); |
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restore_error_handler(); |
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} |
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else |
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{ |
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$this->dom = null; |
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} |
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} |
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public function set_registry(SimplePie_Registry $registry) |
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{ |
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$this->registry = $registry; |
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} |
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public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working) |
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{ |
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if ($this->is_feed($this->file)) |
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{ |
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return $this->file; |
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} |
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if ($this->file->method & SIMPLEPIE_FILE_SOURCE_REMOTE) |
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{ |
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$sniffer = $this->registry->create('Content_Type_Sniffer', array($this->file)); |
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if ($sniffer->get_type() !== 'text/html') |
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{ |
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return null; |
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} |
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} |
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if ($type & ~SIMPLEPIE_LOCATOR_NONE) |
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{ |
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$this->get_base(); |
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} |
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if ($type & SIMPLEPIE_LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery()) |
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{ |
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return $working[0]; |
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} |
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if ($type & (SIMPLEPIE_LOCATOR_LOCAL_EXTENSION | SIMPLEPIE_LOCATOR_LOCAL_BODY | SIMPLEPIE_LOCATOR_REMOTE_EXTENSION | SIMPLEPIE_LOCATOR_REMOTE_BODY) && $this->get_links()) |
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{ |
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if ($type & SIMPLEPIE_LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local)) |
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{ |
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return $working; |
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} |
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if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local)) |
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{ |
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return $working; |
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} |
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if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere)) |
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{ |
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return $working; |
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} |
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if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere)) |
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{ |
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return $working; |
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} |
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} |
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return null; |
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} |
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public function is_feed($file) |
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{ |
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if ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE) |
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{ |
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$sniffer = $this->registry->create('Content_Type_Sniffer', array($file)); |
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$sniffed = $sniffer->get_type(); |
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if (in_array($sniffed, array('application/rss+xml', 'application/rdf+xml', 'text/rdf', 'application/atom+xml', 'text/xml', 'application/xml'))) |
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{ |
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return true; |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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elseif ($file->method & SIMPLEPIE_FILE_SOURCE_LOCAL) |
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{ |
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return true; |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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public function get_base() |
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{ |
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if ($this->dom === null) |
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{ |
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throw new SimplePie_Exception('DOMDocument not found, unable to use locator'); |
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} |
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$this->http_base = $this->file->url; |
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$this->base = $this->http_base; |
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$elements = $this->dom->getElementsByTagName('base'); |
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foreach ($elements as $element) |
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{ |
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if ($element->hasAttribute('href')) |
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{ |
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$base = $this->registry->call('Misc', 'absolutize_url', array(trim($element->getAttribute('href')), $this->http_base)); |
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if ($base === false) |
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{ |
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continue; |
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} |
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$this->base = $base; |
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$this->base_location = method_exists($element, 'getLineNo') ? $element->getLineNo() : 0; |
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break; |
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} |
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} |
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} |
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public function autodiscovery() |
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{ |
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$done = array(); |
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$feeds = array(); |
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$feeds = array_merge($feeds, $this->search_elements_by_tag('link', $done, $feeds)); |
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$feeds = array_merge($feeds, $this->search_elements_by_tag('a', $done, $feeds)); |
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$feeds = array_merge($feeds, $this->search_elements_by_tag('area', $done, $feeds)); |
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if (!empty($feeds)) |
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{ |
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return array_values($feeds); |
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} |
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else |
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{ |
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return null; |
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} |
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} |
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protected function search_elements_by_tag($name, &$done, $feeds) |
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{ |
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if ($this->dom === null) |
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{ |
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throw new SimplePie_Exception('DOMDocument not found, unable to use locator'); |
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} |
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$links = $this->dom->getElementsByTagName($name); |
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foreach ($links as $link) |
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{ |
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if ($this->checked_feeds === $this->max_checked_feeds) |
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{ |
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break; |
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} |
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if ($link->hasAttribute('href') && $link->hasAttribute('rel')) |
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{ |
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$rel = array_unique($this->registry->call('Misc', 'space_seperated_tokens', array(strtolower($link->getAttribute('rel'))))); |
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$line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1; |
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if ($this->base_location < $line) |
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{ |
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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base)); |
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} |
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else |
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{ |
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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base)); |
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} |
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if ($href === false) |
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{ |
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continue; |
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} |
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if (!in_array($href, $done) && in_array('feed', $rel) || (in_array('alternate', $rel) && !in_array('stylesheet', $rel) && $link->hasAttribute('type') && in_array(strtolower($this->registry->call('Misc', 'parse_mime', array($link->getAttribute('type')))), array('application/rss+xml', 'application/atom+xml'))) && !isset($feeds[$href])) |
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{ |
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$this->checked_feeds++; |
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$headers = array( |
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'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', |
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); |
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$feed = $this->registry->create('File', array($href, $this->timeout, 5, $headers, $this->useragent)); |
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if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) |
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{ |
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$feeds[$href] = $feed; |
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} |
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} |
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$done[] = $href; |
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} |
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} |
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return $feeds; |
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} |
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public function get_links() |
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{ |
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if ($this->dom === null) |
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{ |
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throw new SimplePie_Exception('DOMDocument not found, unable to use locator'); |
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} |
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$links = $this->dom->getElementsByTagName('a'); |
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foreach ($links as $link) |
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{ |
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if ($link->hasAttribute('href')) |
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{ |
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$href = trim($link->getAttribute('href')); |
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$parsed = $this->registry->call('Misc', 'parse_url', array($href)); |
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if ($parsed['scheme'] === '' || preg_match('/^(http(s)|feed)?$/i', $parsed['scheme'])) |
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{ |
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if (method_exists($link, 'getLineNo') && $this->base_location < $link->getLineNo()) |
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{ |
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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base)); |
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} |
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else |
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{ |
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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base)); |
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} |
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if ($href === false) |
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{ |
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continue; |
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} |
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$current = $this->registry->call('Misc', 'parse_url', array($this->file->url)); |
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if ($parsed['authority'] === '' || $parsed['authority'] === $current['authority']) |
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{ |
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$this->local[] = $href; |
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} |
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else |
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{ |
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$this->elsewhere[] = $href; |
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} |
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} |
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} |
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} |
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$this->local = array_unique($this->local); |
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$this->elsewhere = array_unique($this->elsewhere); |
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if (!empty($this->local) || !empty($this->elsewhere)) |
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{ |
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return true; |
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} |
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return null; |
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} |
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public function extension(&$array) |
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{ |
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foreach ($array as $key => $value) |
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{ |
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if ($this->checked_feeds === $this->max_checked_feeds) |
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{ |
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break; |
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} |
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if (in_array(strtolower(strrchr($value, '.')), array('.rss', '.rdf', '.atom', '.xml'))) |
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{ |
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$this->checked_feeds++; |
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$headers = array( |
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'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', |
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); |
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$feed = $this->registry->create('File', array($value, $this->timeout, 5, $headers, $this->useragent)); |
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if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) |
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{ |
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return $feed; |
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} |
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else |
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{ |
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unset($array[$key]); |
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} |
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} |
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} |
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return null; |
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} |
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public function body(&$array) |
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{ |
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foreach ($array as $key => $value) |
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{ |
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if ($this->checked_feeds === $this->max_checked_feeds) |
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{ |
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break; |
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} |
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if (preg_match('/(rss|rdf|atom|xml)/i', $value)) |
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{ |
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$this->checked_feeds++; |
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$headers = array( |
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'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', |
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); |
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$feed = $this->registry->create('File', array($value, $this->timeout, 5, null, $this->useragent)); |
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if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) |
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{ |
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return $feed; |
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} |
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else |
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{ |
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unset($array[$key]); |
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} |
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} |
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} |
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return null; |
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} |
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} |
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