/home/ytevagd/public_html/wp-includes/SimplePie/src/Locator.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) 2004-2022, 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
*/
namespace SimplePie;
/**
* Used for feed auto-discovery
*
*
* This class can be overloaded with {@see \SimplePie\SimplePie::set_locator_class()}
*
* @package SimplePie
*/
class Locator implements RegistryAware
{
public $useragent;
public $timeout;
public $file;
public $local = [];
public $elsewhere = [];
public $cached_entities = [];
public $http_base;
public $base;
public $base_location = 0;
public $checked_feeds = 0;
public $max_checked_feeds = 10;
public $force_fsockopen = false;
public $curl_options = [];
public $dom;
protected $registry;
public function __construct(\SimplePie\File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10, $force_fsockopen = false, $curl_options = [])
{
$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(['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)/* : void */
{
$this->registry = $registry;
}
public function find($type = \SimplePie\SimplePie::LOCATOR_ALL, &$working = null)
{
if ($this->is_feed($this->file)) {
return $this->file;
}
if ($this->file->method & \SimplePie\SimplePie::FILE_SOURCE_REMOTE) {
$sniffer = $this->registry->create(Content\Type\Sniffer::class, [$this->file]);
if ($sniffer->get_type() !== 'text/html') {
return null;
}
}
if ($type & ~\SimplePie\SimplePie::LOCATOR_NONE) {
$this->get_base();
}
if ($type & \SimplePie\SimplePie::LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery()) {
return $working[0];
}
if ($type & (\SimplePie\SimplePie::LOCATOR_LOCAL_EXTENSION | \SimplePie\SimplePie::LOCATOR_LOCAL_BODY | \SimplePie\SimplePie::LOCATOR_REMOTE_EXTENSION | \SimplePie\SimplePie::LOCATOR_REMOTE_BODY) && $this->get_links()) {
if ($type & \SimplePie\SimplePie::LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local)) {
return $working[0];
}
if ($type & \SimplePie\SimplePie::LOCATOR_LOCAL_BODY && $working = $this->body($this->local)) {
return $working[0];
}
if ($type & \SimplePie\SimplePie::LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere)) {
return $working[0];
}
if ($type & \SimplePie\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\SimplePie::FILE_SOURCE_REMOTE) {
$sniffer = $this->registry->create(Content\Type\Sniffer::class, [$file]);
$sniffed = $sniffer->get_type();
$mime_types = ['application/rss+xml', 'application/rdf+xml',
'text/rdf', 'application/atom+xml', 'text/xml',
'application/xml', 'application/x-rss+xml'];
if ($check_html) {
$mime_types[] = 'text/html';
}
return in_array($sniffed, $mime_types);
} elseif ($file->method & \SimplePie\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 = $this->registry->call(Misc::class, 'absolutize_url', [trim($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 = [];
$feeds = [];
$feeds = array_merge($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::class, 'space_separated_tokens', [strtolower($link->getAttribute('rel'))]));
$line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1;
if ($this->base_location < $line) {
$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->base]);
} else {
$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($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::class, 'parse_mime', [$link->getAttribute('type')])), ['text/html', 'application/rss+xml', 'application/atom+xml'])) && !isset($feeds[$href])) {
$this->checked_feeds++;
$headers = [
'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 = $this->registry->create(File::class, [$href, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options]);
if ($feed->success && ($feed->method & \SimplePie\SimplePie::FILE_SOURCE_REMOTE === 0 || ($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 = $this->registry->call(Misc::class, 'parse_url', [$href]);
if ($parsed['scheme'] === '' || preg_match('/^(https?|feed)?$/i', $parsed['scheme'])) {
if (method_exists($link, 'getLineNo') && $this->base_location < $link->getLineNo()) {
$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->base]);
} else {
$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->http_base]);
}
if ($href === false) {
continue;
}
$current = $this->registry->call(Misc::class, 'parse_url', [$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 = $this->registry->call(Misc::class, 'parse_url', [$href]);
if ($parsed['scheme'] === '' ||
preg_match('/^https?$/i', $parsed['scheme'])) {
if (method_exists($link, 'getLineNo') &&
$this->base_location < $link->getLineNo()) {
$href = $this->registry->call(
Misc::class,
'absolutize_url',
[trim($link->getAttribute('href')), $this->base]
);
} else {
$href = $this->registry->call(
Misc::class,
'absolutize_url',
[trim($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, '.')), ['.rss', '.rdf', '.atom', '.xml'])) {
$this->checked_feeds++;
$headers = [
'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 = $this->registry->create(File::class, [$value, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options]);
if ($feed->success && ($feed->method & \SimplePie\SimplePie::FILE_SOURCE_REMOTE === 0 || ($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('/(feed|rss|rdf|atom|xml)/i', $value)) {
$this->checked_feeds++;
$headers = [
'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 = $this->registry->create(File::class, [$value, $this->timeout, 5, null, $this->useragent, $this->force_fsockopen, $this->curl_options]);
if ($feed->success && ($feed->method & \SimplePie\SimplePie::FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed)) {
return [$feed];
} else {
unset($array[$key]);
}
}
}
return null;
}
}
class_alias('SimplePie\Locator', 'SimplePie_Locator', false);
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