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<?phpdeclare(strict_types=1);/*** 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);