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<?php |
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|
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if (!defined('WEBTOTEM_INIT') || WEBTOTEM_INIT !== true) { |
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if (!headers_sent()) { |
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header('HTTP/1.1 403 Forbidden'); |
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} |
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die("Protected By WebTotem!"); |
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} |
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|
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/** |
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* WebTotem page scan class for Wordpress. |
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*/ |
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class WebTotemCrawler |
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{ |
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/** |
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* Running a single iteration |
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* |
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* @param array $scan_temp |
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* The data of the current scan. |
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*/ |
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public static function init($scan_temp) { |
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|
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$crawler_temp = json_decode(WebTotemOption::getOption('crawler_temp'), true) ?: []; |
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|
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$i = 1; |
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if (!$crawler_temp) { |
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|
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$pre_scan = self::pre_scan(); |
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|
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$crawler_temp['internal']['new'] = $pre_scan['internal']; |
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$crawler_temp['external'] = WebTotem::arrayUniqueKey($pre_scan['external'], 'link'); |
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$crawler_temp['scripts'] = WebTotem::arrayUniqueKey($pre_scan['scripts'], 'link'); |
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$crawler_temp['iframes'] = WebTotem::arrayUniqueKey( $pre_scan['iframes'], 'link'); |
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$crawler_temp['exclude'] = array_unique($pre_scan['exclude']); |
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|
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$crawler_temp['internal']['new'] = WebTotem::arrayUniqueKey( array_merge($crawler_temp['internal']['new'], $scan_temp['links']), 'link'); |
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|
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$i++; |
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} |
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|
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foreach ($crawler_temp['internal']['new'] as $key => $item) { |
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if($result = self::explore_page($item['link'], $crawler_temp['exclude'])) { |
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$crawler_temp['internal']['visited'][] = $item; |
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|
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$crawler_temp['internal']['new'] = WebTotem::arrayUniqueKey(array_merge($crawler_temp['internal']['new'] ?? [], $result['internal'] ?? []), 'link'); |
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$crawler_temp['external'] = WebTotem::arrayUniqueKey(array_merge($crawler_temp['external'] ?? [], $result['external'] ?? []), 'link'); |
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$crawler_temp['scripts'] = WebTotem::arrayUniqueKey(array_merge($crawler_temp['scripts'] ?? [], $result['scripts'] ?? []), 'link'); |
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$crawler_temp['iframes'] = WebTotem::arrayUniqueKey(array_merge($crawler_temp['iframes'] ?? [], $result['iframes'] ?? []), 'link'); |
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$crawler_temp['exclude'] = array_merge($crawler_temp['exclude'] ?? [], $result['exclude'] ?? []); |
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} |
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|
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unset($crawler_temp['internal']['new'][$key]); |
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WebTotemOption::setOptions(['crawler_temp' => $crawler_temp]); |
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|
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if ($i >= 5) break; |
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$i++; |
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} |
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|
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if (empty($crawler_temp['internal']['new'])) { |
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|
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if($scan_temp['ready_to_save']){ |
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|
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if(isset($crawler_temp['internal']['visited']) and $crawler_temp['external']){ |
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$links = array_merge($crawler_temp['internal']['visited'], $crawler_temp['external']); |
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} elseif (isset($crawler_temp['internal']['visited'])){ |
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$links = $crawler_temp['internal']['visited']; |
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} else { |
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$links = $crawler_temp['external']; |
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} |
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|
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$data = [ |
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'links' => $links ?? [], |
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'scripts' => $crawler_temp['scripts'] ?? [], |
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'iframes' => $crawler_temp['iframes'] ?? [], |
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]; |
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self::saveData($data); |
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|
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WebTotemOption::setOptions(['crawler_temp' => '']); |
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WebTotemOption::setOptions(['scan_temp' => '']); |
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WebTotemOption::setOptions(['scan_init' => 0]); |
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|
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// Resetting the task in the cron. |
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wp_clear_scheduled_hook('webtotem_daily_cron'); |
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wp_schedule_event(time() + 86395, 'daily', 'webtotem_daily_cron'); |
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} else { |
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WebTotemOption::setOptions([ |
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'scan_temp' => [ |
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'current_scan' => 'crawler', |
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'links' => [], |
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'ready_to_save' => true, |
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] |
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]); |
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} |
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|
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} |
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|
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} |
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|
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/** |
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* Preliminary scan of the site. |
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* |
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* @return array |
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*/ |
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private static function pre_scan() { |
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$site_url = get_site_url(); |
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$internal = []; |
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$exclude = []; |
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|
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// Scanning the file robots.txt |
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$robotsTxt = file_get_contents(ABSPATH . '/robots.txt'); |
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$lines = explode("\n", $robotsTxt); |
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|
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foreach ($lines as $line) { |
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if (strpos($line, 'Disallow:') === 0 || strpos($line, 'Allow:') === 0) { |
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$url = trim(substr($line, strpos($line, ':') + 1)); |
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$exclude[] = $url; |
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$robots_urls[] = (string)$url->loc; |
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} |
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} |
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|
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foreach ($robots_urls as $url) { |
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if (substr($url, 0, 1) == "#") { |
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continue; |
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} |
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$internal[] = ['link' => $url, 'page' => $site_url . '/robots.txt', 'is_internal' => self::isInternal($url)]; |
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} |
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|
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// Adding links from popular sitemaps plugins |
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$sitemaps = [ |
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$site_url . '/sitemaps.xml', |
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$site_url . '/index.php?xml_sitemap=params=.', |
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$site_url . '/?sitemap=1', |
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$site_url . '/sitemap_index.xml', |
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]; |
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|
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foreach ($sitemaps as $url) { |
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$internal[] = ['link' => $url, 'page' => __('by sitemap plugins', 'wtotem'), 'is_internal' => true]; |
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} |
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|
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// Scanning the file sitemap.xml |
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$xml = simplexml_load_file(ABSPATH . '/sitemap.xml'); |
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|
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$sitemap_urls = []; |
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foreach ($xml->url as $url) { |
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$exclude[] = (string)$url->loc; |
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$sitemap_urls[] = (string)$url->loc; |
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} |
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|
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foreach ($sitemap_urls as $url) { |
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if (substr($url, 0, 1) == "#") { |
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continue; |
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} |
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$internal[] = ['link' => $url, 'page' => $site_url . '/sitemap.xml', 'is_internal' => self::isInternal($url)]; |
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} |
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|
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// Scanning the main page |
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$result = self::explore_page($site_url); |
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|
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$internal = array_merge($internal, $result['internal']); |
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$external = array_unique($result['external']); |
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$exclude = array_merge($exclude, $result['exclude']); |
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|
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return [ |
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'internal' => $internal ?: [], |
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'external' => $external ?: [], |
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'scripts' => $result['scripts'] ?: [], |
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'iframes' => $result['iframes'] ?: [], |
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'exclude' => $exclude ?: [], |
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]; |
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|
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} |
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|
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/** |
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* Get and explore the content of the page. |
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* |
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* @param string $url |
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* Link to the page. |
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* @param string $exclude |
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* Links that have already been checked. |
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* |
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* @return array|bool |
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*/ |
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private static function explore_page($url, $exclude = []) { |
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|
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$headers = get_headers($url); |
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|
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if ($headers === false || strpos($headers[0], '200 OK') === false) { |
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return false; |
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} |
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|
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// Initializing the cURL session |
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$curl = curl_init(); |
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|
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// Setting the parameters of the cURL session |
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curl_setopt($curl, CURLOPT_URL, $url); // Setting the URL |
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); // We return the result as a string |
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curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); // Follow the redirects |
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curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); // Disabling SSL certificate verification |
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|
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// Execute the request and get the content of the page |
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$content = curl_exec($curl); |
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|
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// Checking for errors when executing the request |
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if (curl_errno($curl)) { |
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WebTotemOption::setNotification('error', __('Request execution error: ', 'wtotem')) . curl_error($curl); |
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} |
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|
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// Closing the cURL session |
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curl_close($curl); |
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|
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// Checking the content for matches with the template, using regular expressions |
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return self::getMatches($content, $url, $exclude); |
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} |
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|
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/** |
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* We are looking for links, scripts and frames on the page. |
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* |
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* @param string $content |
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* The content of the page being checked. |
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* @param string $url |
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* Link to the page. |
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* @param string $exclude |
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* Links that have already been checked. |
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* |
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* @return array |
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*/ |
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private static function getMatches($content, $url, $exclude) { |
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|
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$matches = [ |
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'internal' => [], |
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'external' => [], |
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'exclude' => [], |
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'scripts' => [], |
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'iframe' => [], |
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]; |
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|
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if($content){ |
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// Get all the matches. |
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$pattern = '/(<a.*?href=["\'](([\da-z\.-\/]+)([\/\w\.-\?\%\&]*)*\/?)["\'].*?>|<script.*?src=["\'](.*?)["\'].*?>|<iframe.*?src=["\'](.*?)["\'].*?>|onclick="[^"]*location[^"][^\'"]+\'([^\']+)\')/i'; |
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preg_match_all($pattern, $content, $all_matches); |
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|
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$array = [ |
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'links' => [], |
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'scripts' => [], |
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'iframes' => [], |
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]; |
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|
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// Divide by categories. |
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foreach ($all_matches[0] as $match) { |
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preg_match_all('/<a.*?href=["\'](.*?)["\'].*?>/i', $match, $links_matches); |
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if ($links_matches[1]) $array['links'] = array_merge($array['links'], $links_matches[1]); |
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preg_match_all('/onclick="[^"]*location[^"][^\'"]+\'([^\']+)\'/i', $match, $links_2_matches); |
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if ($links_2_matches[1]) $array['links'] = array_merge($array['links'], $links_2_matches[1]); |
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preg_match_all('/<script.*?src=["\'](.*?)["\'].*?>/i', $match, $js_matches); |
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if ($js_matches[1]) $array['scripts'] = array_merge($array['scripts'], $js_matches[1]); |
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preg_match_all('/<iframe.*?src=["\'](.*?)["\'].*?>/i', $match, $iframe_matches); |
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if ($iframe_matches[1]) $array['iframes'] = array_merge($array['iframes'], $iframe_matches[1]); |
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} |
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|
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foreach ($array['links'] as $link) { |
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if (self::isInternal($link)) { |
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if (substr($link, 0, 1) == "#") { |
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continue; |
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} |
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if (in_array($link, $exclude)) { |
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continue; |
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} |
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$matches['internal'][] = ['link' => $link, 'page' => $url, 'is_internal' => true]; |
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$matches['exclude'][] = $link; |
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} else { |
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$matches['external'][] = ['link' => $link, 'page' => $url, 'is_internal' => false]; |
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} |
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} |
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|
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foreach (array_unique($array['scripts']) as $script) { |
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$matches['scripts'][] = ['link' => $script, 'page' => $url, 'is_internal' => self::isInternal($script)]; |
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} |
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foreach (array_unique($array['iframes']) as $iframe) { |
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$matches['iframe'][] = ['link' => $iframe, 'page' => $url, 'is_internal' => self::isInternal($iframe)]; |
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} |
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|
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} |
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|
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return $matches; |
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} |
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|
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/** |
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* We check whether the link is internal or external. |
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* |
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* @param string $string |
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* The link being checked. |
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* |
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* @return bool |
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*/ |
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private static function isInternal($string): bool { |
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$current_domain_parts = parse_url(get_home_url()); |
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$current_domain = $current_domain_parts['host']; |
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|
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if (substr($string, 0, 5) == "https" |
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|| substr($string, 0, 4) == "http" |
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|| substr($string, 0, 2) == "//") { |
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|
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if (strpos($string, $current_domain) === false) { |
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return false; |
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} |
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} |
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|
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return true; |
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} |
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|
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/** |
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* Save data. |
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* |
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* @param array $data |
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* Array matches data. |
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*/ |
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private static function saveData($data) { |
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|
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WebTotemDB::deleteData([], 'scan_logs'); |
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$values = ''; |
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foreach ($data as $data_type => $links) { |
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foreach ($links as $datum) { |
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$values .= sprintf("('%s','%s','%s','%s','%s'),", |
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date("Y-m-d H:i:s"), |
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$data_type, |
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$datum['page'], |
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$datum['link'], |
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$datum['is_internal'] |
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); |
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} |
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} |
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|
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$values = substr_replace($values, ";", -1); |
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|
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$columns = '(created_at, data_type, source, content, is_internal)'; |
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|
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WebTotemDB::setRows('scan_logs', $columns, $values); |
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} |
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|
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} |
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|
