315 lines
9.7 KiB
PHP
315 lines
9.7 KiB
PHP
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<?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) 2004-2009, 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 1.3-dev
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* @copyright 2004-2010 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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* @todo phpDoc comments
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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 $file_class = 'SimplePie_File';
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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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var $content_type_sniffer_class = 'SimplePie_Content_Type_Sniffer';
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public function __construct(&$file, $timeout = 10, $useragent = null, $file_class = 'SimplePie_File', $max_checked_feeds = 10, $content_type_sniffer_class = 'SimplePie_Content_Type_Sniffer')
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{
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$this->file =& $file;
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$this->file_class = $file_class;
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$this->useragent = $useragent;
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$this->timeout = $timeout;
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$this->max_checked_feeds = $max_checked_feeds;
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$this->content_type_sniffer_class = $content_type_sniffer_class;
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}
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public function find($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 = new $this->content_type_sniffer_class($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 = new $this->content_type_sniffer_class($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 ($file->method & SIMPLEPIE_FILE_SOURCE_LOCAL)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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public function get_base()
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{
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$this->http_base = $this->file->url;
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$this->base = $this->http_base;
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$elements = SimplePie_Misc::get_element('base', $this->file->body);
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foreach ($elements as $element)
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{
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if ($element['attribs']['href']['data'] !== '')
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{
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$this->base = SimplePie_Misc::absolutize_url(trim($element['attribs']['href']['data']), $this->http_base);
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$this->base_location = $element['offset'];
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break;
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}
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}
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}
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public function autodiscovery()
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{
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$links = array_merge(SimplePie_Misc::get_element('link', $this->file->body), SimplePie_Misc::get_element('a', $this->file->body), SimplePie_Misc::get_element('area', $this->file->body));
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$done = array();
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$feeds = array();
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foreach ($links as $link)
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{
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if ($this->checked_feeds === $this->max_checked_feeds)
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{
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break;
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}
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if (isset($link['attribs']['href']['data']) && isset($link['attribs']['rel']['data']))
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{
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$rel = array_unique(SimplePie_Misc::space_seperated_tokens(strtolower($link['attribs']['rel']['data'])));
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if ($this->base_location < $link['offset'])
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{
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$href = SimplePie_Misc::absolutize_url(trim($link['attribs']['href']['data']), $this->base);
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}
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else
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{
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$href = SimplePie_Misc::absolutize_url(trim($link['attribs']['href']['data']), $this->http_base);
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}
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if (!in_array($href, $done) && in_array('feed', $rel) || (in_array('alternate', $rel) && !in_array('stylesheet', $rel) && !empty($link['attribs']['type']['data']) && in_array(strtolower(SimplePie_Misc::parse_mime($link['attribs']['type']['data'])), array('application/rss+xml', 'application/atom+xml'))) && !isset($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 = new $this->file_class($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[] = $href;
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}
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}
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if (!empty($feeds))
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{
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return array_values($feeds);
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}
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else
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{
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return null;
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}
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}
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public function get_links()
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{
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$links = SimplePie_Misc::get_element('a', $this->file->body);
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foreach ($links as $link)
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{
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if (isset($link['attribs']['href']['data']))
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{
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$href = trim($link['attribs']['href']['data']);
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$parsed = SimplePie_Misc::parse_url($href);
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if ($parsed['scheme'] === '' || preg_match('/^(http(s)|feed)?$/i', $parsed['scheme']))
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{
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if ($this->base_location < $link['offset'])
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{
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$href = SimplePie_Misc::absolutize_url(trim($link['attribs']['href']['data']), $this->base);
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}
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else
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{
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$href = SimplePie_Misc::absolutize_url(trim($link['attribs']['href']['data']), $this->http_base);
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}
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$current = SimplePie_Misc::parse_url($this->file->url);
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if ($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 = new $this->file_class($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 = new $this->file_class($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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