WordPress/wp-includes/SimplePie/Locator.php
Sergey Biryukov c3112cab39 External Libraries: Update the SimplePie library to version 1.5.7.
This version shows significant improvements in the compatibility of SimplePie with PHP 8.0, 8.1, and even contains an initial PHP 8.2 fix. The release also contains a number of other bug fixes.

Release notes: https://github.com/simplepie/simplepie/releases/tag/1.5.7

For a full list of changes in this update, see the SimplePie GitHub:
https://github.com/simplepie/simplepie/compare/1.5.6...1.5.7

Follow-up to [47733], [49176].

Props jrf, SergeyBiryukov.
Fixes #54659.
Built from https://develop.svn.wordpress.org/trunk@52393


git-svn-id: http://core.svn.wordpress.org/trunk@51985 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-12-20 19:33:00 +00:00

433 lines
13 KiB
PHP

<?php
/**
* SimplePie
*
* A PHP-Based RSS and Atom Feed Framework.
* Takes the hard work out of managing a complete RSS/Atom solution.
*
* Copyright (c) 2004-2016, Ryan Parman, Sam 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
* @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
* @author Ryan Parman
* @author Sam 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;
var $force_fsockopen = false;
var $curl_options = array();
var $dom;
protected $registry;
public function __construct(SimplePie_File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10, $force_fsockopen = false, $curl_options = array())
{
$this->file = $file;
$this->useragent = $useragent;
$this->timeout = $timeout;
$this->max_checked_feeds = $max_checked_feeds;
$this->force_fsockopen = $force_fsockopen;
$this->curl_options = $curl_options;
if (class_exists('DOMDocument') && $this->file->body != '')
{
$this->dom = new DOMDocument();
set_error_handler(array('SimplePie_Misc', 'silence_errors'));
try
{
$this->dom->loadHTML($this->file->body);
}
catch (Throwable $ex)
{
$this->dom = null;
}
restore_error_handler();
}
else
{
$this->dom = null;
}
}
public function set_registry(SimplePie_Registry $registry)
{
$this->registry = $registry;
}
public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working = null)
{
if ($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 $working[0];
}
if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local))
{
return $working[0];
}
if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere))
{
return $working[0];
}
if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere))
{
return $working[0];
}
}
return null;
}
public function is_feed($file, $check_html = false)
{
if ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)
{
$sniffer = $this->registry->create('Content_Type_Sniffer', array($file));
$sniffed = $sniffer->get_type();
$mime_types = array('application/rss+xml', 'application/rdf+xml',
'text/rdf', 'application/atom+xml', 'text/xml',
'application/xml', 'application/x-rss+xml');
if ($check_html)
{
$mime_types[] = 'text/html';
}
return in_array($sniffed, $mime_types);
}
elseif ($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($feeds);
}
return null;
}
protected function search_elements_by_tag($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_separated_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($link->getAttribute('type')))), array('text/html', 'application/rss+xml', 'application/atom+xml'))) && !isset($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, $this->force_fsockopen, $this->curl_options));
if ($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, true))
{
$feeds[$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 ($parsed['scheme'] === '' || preg_match('/^(https?|feed)?$/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 get_rel_link($rel)
{
if ($this->dom === null)
{
throw new SimplePie_Exception('DOMDocument not found, unable to use '.
'locator');
}
if (!class_exists('DOMXpath'))
{
throw new SimplePie_Exception('DOMXpath not found, unable to use '.
'get_rel_link');
}
$xpath = new DOMXpath($this->dom);
$query = '//a[@rel and @href] | //link[@rel and @href]';
foreach ($xpath->query($query) as $link)
{
$href = trim($link->getAttribute('href'));
$parsed = $this->registry->call('Misc', 'parse_url', array($href));
if ($parsed['scheme'] === '' ||
preg_match('/^https?$/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)
{
return null;
}
$rel_values = explode(' ', strtolower($link->getAttribute('rel')));
if (in_array($rel, $rel_values))
{
return $href;
}
}
}
return null;
}
public function extension(&$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, $this->force_fsockopen, $this->curl_options));
if ($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 array($feed);
}
else
{
unset($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('/(feed|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, $this->force_fsockopen, $this->curl_options));
if ($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 array($feed);
}
else
{
unset($array[$key]);
}
}
}
return null;
}
}