Viewing file: Locator.php (10.92 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
<?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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