--- /dev/null
+<?php
+/**
+ * SimplePie
+ *
+ * A PHP-Based RSS and Atom Feed Framework.
+ * Takes the hard work out of managing a complete RSS/Atom solution.
+ *
+ * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice, this list
+ * of conditions and the following disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * * Neither the name of the SimplePie Team nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
+ * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package SimplePie
+ * @version 1.3.1
+ * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
+ * @author Ryan Parman
+ * @author Geoffrey Sneddon
+ * @author Ryan McCue
+ * @link http://simplepie.org/ SimplePie
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ */
+
+/**
+ * Used for feed auto-discovery
+ *
+ *
+ * This class can be overloaded with {@see SimplePie::set_locator_class()}
+ *
+ * @package SimplePie
+ */
+class SimplePie_Locator
+{
+ var $useragent;
+ var $timeout;
+ var $file;
+ var $local = array();
+ var $elsewhere = array();
+ var $cached_entities = array();
+ var $http_base;
+ var $base;
+ var $base_location = 0;
+ var $checked_feeds = 0;
+ var $max_checked_feeds = 10;
+ protected $registry;
+
+ public function __construct(SimplePie_File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10)
+ {
+ $this->file = $file;
+ $this->useragent = $useragent;
+ $this->timeout = $timeout;
+ $this->max_checked_feeds = $max_checked_feeds;
+
+ if (class_exists('DOMDocument'))
+ {
+ $this->dom = new DOMDocument();
+
+ set_error_handler(array('SimplePie_Misc', 'silence_errors'));
+ $this->dom->loadHTML($this->file->body);
+ restore_error_handler();
+ }
+ else
+ {
+ $this->dom = null;
+ }
+ }
+
+ public function set_registry(SimplePie_Registry $registry)
+ {
+ $this->registry = $registry;
+ }
+
+ public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working)
+ {
+ if ($this->is_feed($this->file))
+ {
+ return $this->file;
+ }
+
+ if ($this->file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)
+ {
+ $sniffer = $this->registry->create('Content_Type_Sniffer', array($this->file));
+ if ($sniffer->get_type() !== 'text/html')
+ {
+ return null;
+ }
+ }
+
+ if ($type & ~SIMPLEPIE_LOCATOR_NONE)
+ {
+ $this->get_base();
+ }
+
+ if ($type & SIMPLEPIE_LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery())
+ {
+ return $working[0];
+ }
+
+ if ($type & (SIMPLEPIE_LOCATOR_LOCAL_EXTENSION | SIMPLEPIE_LOCATOR_LOCAL_BODY | SIMPLEPIE_LOCATOR_REMOTE_EXTENSION | SIMPLEPIE_LOCATOR_REMOTE_BODY) && $this->get_links())
+ {
+ if ($type & SIMPLEPIE_LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local))
+ {
+ return $working;
+ }
+
+ if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local))
+ {
+ return $working;
+ }
+
+ if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere))
+ {
+ return $working;
+ }
+
+ if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere))
+ {
+ return $working;
+ }
+ }
+ return null;
+ }
+
+ public function is_feed($file)
+ {
+ if ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)
+ {
+ $sniffer = $this->registry->create('Content_Type_Sniffer', array($file));
+ $sniffed = $sniffer->get_type();
+ if (in_array($sniffed, array('application/rss+xml', 'application/rdf+xml', 'text/rdf', 'application/atom+xml', 'text/xml', 'application/xml')))
+ {
+ return true;
+ }
+ else
+ {
+ return false;
+ }
+ }
+ elseif ($file->method & SIMPLEPIE_FILE_SOURCE_LOCAL)
+ {
+ return true;
+ }
+ else
+ {
+ return false;
+ }
+ }
+
+ public function get_base()
+ {
+ if ($this->dom === null)
+ {
+ throw new SimplePie_Exception('DOMDocument not found, unable to use locator');
+ }
+ $this->http_base = $this->file->url;
+ $this->base = $this->http_base;
+ $elements = $this->dom->getElementsByTagName('base');
+ foreach ($elements as $element)
+ {
+ if ($element->hasAttribute('href'))
+ {
+ $base = $this->registry->call('Misc', 'absolutize_url', array(trim($element->getAttribute('href')), $this->http_base));
+ if ($base === false)
+ {
+ continue;
+ }
+ $this->base = $base;
+ $this->base_location = method_exists($element, 'getLineNo') ? $element->getLineNo() : 0;
+ break;
+ }
+ }
+ }
+
+ public function autodiscovery()
+ {
+ $done = array();
+ $feeds = array();
+ $feeds = array_merge($feeds, $this->search_elements_by_tag('link', $done, $feeds));
+ $feeds = array_merge($feeds, $this->search_elements_by_tag('a', $done, $feeds));
+ $feeds = array_merge($feeds, $this->search_elements_by_tag('area', $done, $feeds));
+
+ if (!empty($feeds))
+ {
+ return array_values($feeds);
+ }
+ else
+ {
+ return null;
+ }
+ }
+
+ protected function search_elements_by_tag($name, &$done, $feeds)
+ {
+ if ($this->dom === null)
+ {
+ throw new SimplePie_Exception('DOMDocument not found, unable to use locator');
+ }
+
+ $links = $this->dom->getElementsByTagName($name);
+ foreach ($links as $link)
+ {
+ if ($this->checked_feeds === $this->max_checked_feeds)
+ {
+ break;
+ }
+ if ($link->hasAttribute('href') && $link->hasAttribute('rel'))
+ {
+ $rel = array_unique($this->registry->call('Misc', 'space_seperated_tokens', array(strtolower($link->getAttribute('rel')))));
+ $line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1;
+
+ if ($this->base_location < $line)
+ {
+ $href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base));
+ }
+ else
+ {
+ $href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base));
+ }
+ if ($href === false)
+ {
+ continue;
+ }
+
+ 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]))
+ {
+ $this->checked_feeds++;
+ $headers = array(
+ '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',
+ );
+ $feed = $this->registry->create('File', array($href, $this->timeout, 5, $headers, $this->useragent));
+ if ($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))
+ {
+ $feeds[$href] = $feed;
+ }
+ }
+ $done[] = $href;
+ }
+ }
+
+ return $feeds;
+ }
+
+ public function get_links()
+ {
+ if ($this->dom === null)
+ {
+ throw new SimplePie_Exception('DOMDocument not found, unable to use locator');
+ }
+
+ $links = $this->dom->getElementsByTagName('a');
+ foreach ($links as $link)
+ {
+ if ($link->hasAttribute('href'))
+ {
+ $href = trim($link->getAttribute('href'));
+ $parsed = $this->registry->call('Misc', 'parse_url', array($href));
+ if ($parsed['scheme'] === '' || preg_match('/^(http(s)|feed)?$/i', $parsed['scheme']))
+ {
+ if (method_exists($link, 'getLineNo') && $this->base_location < $link->getLineNo())
+ {
+ $href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base));
+ }
+ else
+ {
+ $href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base));
+ }
+ if ($href === false)
+ {
+ continue;
+ }
+
+ $current = $this->registry->call('Misc', 'parse_url', array($this->file->url));
+
+ if ($parsed['authority'] === '' || $parsed['authority'] === $current['authority'])
+ {
+ $this->local[] = $href;
+ }
+ else
+ {
+ $this->elsewhere[] = $href;
+ }
+ }
+ }
+ }
+ $this->local = array_unique($this->local);
+ $this->elsewhere = array_unique($this->elsewhere);
+ if (!empty($this->local) || !empty($this->elsewhere))
+ {
+ return true;
+ }
+ return null;
+ }
+
+ public function extension(&$array)
+ {
+ foreach ($array as $key => $value)
+ {
+ if ($this->checked_feeds === $this->max_checked_feeds)
+ {
+ break;
+ }
+ if (in_array(strtolower(strrchr($value, '.')), array('.rss', '.rdf', '.atom', '.xml')))
+ {
+ $this->checked_feeds++;
+
+ $headers = array(
+ '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',
+ );
+ $feed = $this->registry->create('File', array($value, $this->timeout, 5, $headers, $this->useragent));
+ if ($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))
+ {
+ return $feed;
+ }
+ else
+ {
+ unset($array[$key]);
+ }
+ }
+ }
+ return null;
+ }
+
+ public function body(&$array)
+ {
+ foreach ($array as $key => $value)
+ {
+ if ($this->checked_feeds === $this->max_checked_feeds)
+ {
+ break;
+ }
+ if (preg_match('/(rss|rdf|atom|xml)/i', $value))
+ {
+ $this->checked_feeds++;
+ $headers = array(
+ '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',
+ );
+ $feed = $this->registry->create('File', array($value, $this->timeout, 5, null, $this->useragent));
+ if ($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))
+ {
+ return $feed;
+ }
+ else
+ {
+ unset($array[$key]);
+ }
+ }
+ }
+ return null;
+ }
+}
+
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