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efrain |
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<?php
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/**
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* SimplePie
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*
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* A PHP-Based RSS and Atom Feed Framework.
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* Takes the hard work out of managing a complete RSS/Atom solution.
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*
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* Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* * Neither the name of the SimplePie Team nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
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* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package SimplePie
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* @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
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* @author Ryan Parman
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* @author Sam Sneddon
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* @author Ryan McCue
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* @link http://simplepie.org/ SimplePie
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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*/
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namespace SimplePie;
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/**
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* Used for feed auto-discovery
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*
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*
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* This class can be overloaded with {@see \SimplePie\SimplePie::set_locator_class()}
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*
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* @package SimplePie
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*/
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class Locator implements RegistryAware
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{
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public $useragent;
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public $timeout;
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public $file;
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public $local = [];
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public $elsewhere = [];
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public $cached_entities = [];
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public $http_base;
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public $base;
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public $base_location = 0;
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public $checked_feeds = 0;
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public $max_checked_feeds = 10;
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public $force_fsockopen = false;
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public $curl_options = [];
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public $dom;
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protected $registry;
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public function __construct(\SimplePie\File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10, $force_fsockopen = false, $curl_options = [])
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{
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$this->file = $file;
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$this->useragent = $useragent;
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$this->timeout = $timeout;
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$this->max_checked_feeds = $max_checked_feeds;
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$this->force_fsockopen = $force_fsockopen;
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$this->curl_options = $curl_options;
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if (class_exists('DOMDocument') && $this->file->body != '') {
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$this->dom = new \DOMDocument();
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set_error_handler(['SimplePie\Misc', 'silence_errors']);
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try {
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$this->dom->loadHTML($this->file->body);
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} catch (\Throwable $ex) {
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$this->dom = null;
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}
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restore_error_handler();
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} else {
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$this->dom = null;
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}
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}
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public function set_registry(\SimplePie\Registry $registry)/* : void */
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{
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$this->registry = $registry;
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}
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public function find($type = \SimplePie\SimplePie::LOCATOR_ALL, &$working = null)
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{
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if ($this->is_feed($this->file)) {
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return $this->file;
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}
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if ($this->file->method & \SimplePie\SimplePie::FILE_SOURCE_REMOTE) {
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$sniffer = $this->registry->create(Content\Type\Sniffer::class, [$this->file]);
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if ($sniffer->get_type() !== 'text/html') {
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return null;
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}
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}
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if ($type & ~\SimplePie\SimplePie::LOCATOR_NONE) {
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$this->get_base();
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}
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if ($type & \SimplePie\SimplePie::LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery()) {
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return $working[0];
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}
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if ($type & (\SimplePie\SimplePie::LOCATOR_LOCAL_EXTENSION | \SimplePie\SimplePie::LOCATOR_LOCAL_BODY | \SimplePie\SimplePie::LOCATOR_REMOTE_EXTENSION | \SimplePie\SimplePie::LOCATOR_REMOTE_BODY) && $this->get_links()) {
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if ($type & \SimplePie\SimplePie::LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local)) {
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return $working[0];
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}
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if ($type & \SimplePie\SimplePie::LOCATOR_LOCAL_BODY && $working = $this->body($this->local)) {
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return $working[0];
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}
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if ($type & \SimplePie\SimplePie::LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere)) {
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return $working[0];
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}
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if ($type & \SimplePie\SimplePie::LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere)) {
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return $working[0];
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}
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}
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return null;
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}
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public function is_feed($file, $check_html = false)
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{
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if ($file->method & \SimplePie\SimplePie::FILE_SOURCE_REMOTE) {
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$sniffer = $this->registry->create(Content\Type\Sniffer::class, [$file]);
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$sniffed = $sniffer->get_type();
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$mime_types = ['application/rss+xml', 'application/rdf+xml',
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'text/rdf', 'application/atom+xml', 'text/xml',
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'application/xml', 'application/x-rss+xml'];
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if ($check_html) {
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$mime_types[] = 'text/html';
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}
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return in_array($sniffed, $mime_types);
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} elseif ($file->method & \SimplePie\SimplePie::FILE_SOURCE_LOCAL) {
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return true;
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} else {
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return false;
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}
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}
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public function get_base()
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{
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if ($this->dom === null) {
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throw new \SimplePie\Exception('DOMDocument not found, unable to use locator');
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}
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$this->http_base = $this->file->url;
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$this->base = $this->http_base;
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$elements = $this->dom->getElementsByTagName('base');
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foreach ($elements as $element) {
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if ($element->hasAttribute('href')) {
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$base = $this->registry->call(Misc::class, 'absolutize_url', [trim($element->getAttribute('href')), $this->http_base]);
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if ($base === false) {
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continue;
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}
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$this->base = $base;
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$this->base_location = method_exists($element, 'getLineNo') ? $element->getLineNo() : 0;
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break;
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}
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}
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}
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public function autodiscovery()
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{
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$done = [];
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$feeds = [];
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$feeds = array_merge($feeds, $this->search_elements_by_tag('link', $done, $feeds));
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$feeds = array_merge($feeds, $this->search_elements_by_tag('a', $done, $feeds));
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$feeds = array_merge($feeds, $this->search_elements_by_tag('area', $done, $feeds));
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if (!empty($feeds)) {
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return array_values($feeds);
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}
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return null;
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}
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protected function search_elements_by_tag($name, &$done, $feeds)
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{
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if ($this->dom === null) {
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throw new \SimplePie\Exception('DOMDocument not found, unable to use locator');
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}
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$links = $this->dom->getElementsByTagName($name);
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foreach ($links as $link) {
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if ($this->checked_feeds === $this->max_checked_feeds) {
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break;
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}
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if ($link->hasAttribute('href') && $link->hasAttribute('rel')) {
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$rel = array_unique($this->registry->call(Misc::class, 'space_separated_tokens', [strtolower($link->getAttribute('rel'))]));
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$line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1;
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if ($this->base_location < $line) {
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$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->base]);
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} else {
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$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->http_base]);
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}
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if ($href === false) {
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continue;
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}
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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[$href])) {
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$this->checked_feeds++;
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$headers = [
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'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1',
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];
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$feed = $this->registry->create(File::class, [$href, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options]);
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if ($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)) {
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$feeds[$href] = $feed;
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}
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}
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$done[] = $href;
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}
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}
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return $feeds;
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}
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public function get_links()
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{
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if ($this->dom === null) {
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throw new \SimplePie\Exception('DOMDocument not found, unable to use locator');
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}
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$links = $this->dom->getElementsByTagName('a');
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foreach ($links as $link) {
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if ($link->hasAttribute('href')) {
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$href = trim($link->getAttribute('href'));
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$parsed = $this->registry->call(Misc::class, 'parse_url', [$href]);
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if ($parsed['scheme'] === '' || preg_match('/^(https?|feed)?$/i', $parsed['scheme'])) {
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if (method_exists($link, 'getLineNo') && $this->base_location < $link->getLineNo()) {
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$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->base]);
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} else {
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$href = $this->registry->call(Misc::class, 'absolutize_url', [trim($link->getAttribute('href')), $this->http_base]);
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}
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if ($href === false) {
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continue;
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}
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$current = $this->registry->call(Misc::class, 'parse_url', [$this->file->url]);
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if ($parsed['authority'] === '' || $parsed['authority'] === $current['authority']) {
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$this->local[] = $href;
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} else {
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$this->elsewhere[] = $href;
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}
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}
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}
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}
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$this->local = array_unique($this->local);
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$this->elsewhere = array_unique($this->elsewhere);
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if (!empty($this->local) || !empty($this->elsewhere)) {
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return true;
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}
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return null;
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}
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public function get_rel_link($rel)
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{
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281 |
if ($this->dom === null) {
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282 |
throw new \SimplePie\Exception('DOMDocument not found, unable to use '.
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'locator');
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284 |
}
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285 |
if (!class_exists('DOMXpath')) {
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throw new \SimplePie\Exception('DOMXpath not found, unable to use '.
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'get_rel_link');
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288 |
}
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289 |
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$xpath = new \DOMXpath($this->dom);
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$query = '//a[@rel and @href] | //link[@rel and @href]';
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292 |
foreach ($xpath->query($query) as $link) {
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293 |
$href = trim($link->getAttribute('href'));
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294 |
$parsed = $this->registry->call(Misc::class, 'parse_url', [$href]);
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295 |
if ($parsed['scheme'] === '' ||
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296 |
preg_match('/^https?$/i', $parsed['scheme'])) {
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297 |
if (method_exists($link, 'getLineNo') &&
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298 |
$this->base_location < $link->getLineNo()) {
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299 |
$href = $this->registry->call(
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300 |
Misc::class,
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'absolutize_url',
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302 |
[trim($link->getAttribute('href')), $this->base]
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);
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304 |
} else {
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$href = $this->registry->call(
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Misc::class,
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'absolutize_url',
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[trim($link->getAttribute('href')), $this->http_base]
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);
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310 |
}
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311 |
if ($href === false) {
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312 |
return null;
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313 |
}
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314 |
$rel_values = explode(' ', strtolower($link->getAttribute('rel')));
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315 |
if (in_array($rel, $rel_values)) {
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316 |
return $href;
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317 |
}
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318 |
}
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319 |
}
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320 |
return null;
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}
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322 |
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323 |
public function extension(&$array)
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324 |
{
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325 |
foreach ($array as $key => $value) {
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326 |
if ($this->checked_feeds === $this->max_checked_feeds) {
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327 |
break;
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328 |
}
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329 |
if (in_array(strtolower(strrchr($value, '.')), ['.rss', '.rdf', '.atom', '.xml'])) {
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330 |
$this->checked_feeds++;
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|
331 |
|
|
|
332 |
$headers = [
|
|
|
333 |
'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',
|
|
|
334 |
];
|
|
|
335 |
$feed = $this->registry->create(File::class, [$value, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options]);
|
|
|
336 |
if ($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)) {
|
|
|
337 |
return [$feed];
|
|
|
338 |
} else {
|
|
|
339 |
unset($array[$key]);
|
|
|
340 |
}
|
|
|
341 |
}
|
|
|
342 |
}
|
|
|
343 |
return null;
|
|
|
344 |
}
|
|
|
345 |
|
|
|
346 |
public function body(&$array)
|
|
|
347 |
{
|
|
|
348 |
foreach ($array as $key => $value) {
|
|
|
349 |
if ($this->checked_feeds === $this->max_checked_feeds) {
|
|
|
350 |
break;
|
|
|
351 |
}
|
|
|
352 |
if (preg_match('/(feed|rss|rdf|atom|xml)/i', $value)) {
|
|
|
353 |
$this->checked_feeds++;
|
|
|
354 |
$headers = [
|
|
|
355 |
'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',
|
|
|
356 |
];
|
|
|
357 |
$feed = $this->registry->create(File::class, [$value, $this->timeout, 5, null, $this->useragent, $this->force_fsockopen, $this->curl_options]);
|
|
|
358 |
if ($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)) {
|
|
|
359 |
return [$feed];
|
|
|
360 |
} else {
|
|
|
361 |
unset($array[$key]);
|
|
|
362 |
}
|
|
|
363 |
}
|
|
|
364 |
}
|
|
|
365 |
return null;
|
|
|
366 |
}
|
|
|
367 |
}
|
|
|
368 |
|
|
|
369 |
class_alias('SimplePie\Locator', 'SimplePie_Locator', false);
|