mirror of https://github.com/FreshRSS/FreshRSS.git
134 lines
3.6 KiB
PHP
134 lines
3.6 KiB
PHP
<?php
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declare(strict_types=1);
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const FAVICONS_DIR = DATA_PATH . '/favicons/';
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const DEFAULT_FAVICON = PUBLIC_PATH . '/themes/icons/default_favicon.ico';
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function isImgMime(string $content): bool {
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//Based on https://github.com/ArthurHoaro/favicon/blob/3a4f93da9bb24915b21771eb7873a21bde26f5d1/src/Favicon/Favicon.php#L311-L319
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if ($content == '') {
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return false;
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}
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if (!extension_loaded('fileinfo')) {
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return true;
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}
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$isImage = true;
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/** @var finfo $fInfo */
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$fInfo = finfo_open(FILEINFO_MIME_TYPE);
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/** @var string $content */
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$content = finfo_buffer($fInfo, $content);
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$isImage = strpos($content, 'image') !== false;
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finfo_close($fInfo);
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return $isImage;
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}
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/** @param array<int,int|bool> $curlOptions */
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function downloadHttp(string &$url, array $curlOptions = []): string {
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syslog(LOG_INFO, 'FreshRSS Favicon GET ' . $url);
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$url = checkUrl($url);
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if ($url == false) {
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return '';
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}
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/** @var CurlHandle $ch */
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$ch = curl_init($url);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_TIMEOUT => 15,
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CURLOPT_USERAGENT => FRESHRSS_USERAGENT,
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CURLOPT_MAXREDIRS => 10,
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CURLOPT_FOLLOWLOCATION => true,
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CURLOPT_ENCODING => '', //Enable all encodings
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]);
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FreshRSS_Context::initSystem();
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if (FreshRSS_Context::hasSystemConf()) {
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curl_setopt_array($ch, FreshRSS_Context::systemConf()->curl_options);
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}
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curl_setopt_array($ch, $curlOptions);
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$response = curl_exec($ch);
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if (!is_string($response)) {
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$response = '';
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}
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$info = curl_getinfo($ch);
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curl_close($ch);
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if (!empty($info['url'])) {
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$url2 = checkUrl($info['url']);
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if ($url2 != '') {
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$url = $url2; //Possible redirect
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}
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}
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return $info['http_code'] == 200 ? $response : '';
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}
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function searchFavicon(string &$url): string {
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$dom = new DOMDocument();
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$html = downloadHttp($url);
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if ($html == '' || !@$dom->loadHTML($html, LIBXML_NONET | LIBXML_NOERROR | LIBXML_NOWARNING)) {
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return '';
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}
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$xpath = new DOMXPath($dom);
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$links = $xpath->query('//link[@href][translate(@rel, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz")="shortcut icon"'
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. ' or translate(@rel, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz")="icon"]');
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if (!$links) {
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return '';
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}
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// Use the base element for relative paths, if there is one
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$baseElements = $xpath->query('//base[@href]');
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$baseElement = ($baseElements !== false && $baseElements->length > 0) ? $baseElements->item(0) : null;
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$baseUrl = ($baseElement instanceof DOMElement) ? $baseElement->getAttribute('href') : $url;
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foreach ($links as $link) {
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if (!$link instanceof DOMElement) {
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continue;
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}
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$href = trim($link->getAttribute('href'));
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$urlParts = parse_url($url);
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// Handle protocol-relative URLs by adding the current URL's scheme
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if (substr($href, 0, 2) === '//') {
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$href = ($urlParts['scheme'] ?? 'https') . ':' . $href;
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}
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$href = SimplePie_IRI::absolutize($baseUrl, $href);
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if ($href == false) {
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return '';
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}
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$iri = $href->get_iri();
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$favicon = downloadHttp($iri, array(CURLOPT_REFERER => $url));
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if (isImgMime($favicon)) {
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return $favicon;
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}
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}
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return '';
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}
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function download_favicon(string $url, string $dest): bool {
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$url = trim($url);
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$favicon = searchFavicon($url);
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if ($favicon == '') {
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$rootUrl = preg_replace('%^(https?://[^/]+).*$%i', '$1/', $url);
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if ($rootUrl != $url) {
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$url = $rootUrl;
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$favicon = searchFavicon($url);
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}
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if ($favicon == '') {
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$link = $rootUrl . 'favicon.ico';
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$favicon = downloadHttp($link, array(
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CURLOPT_REFERER => $url,
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));
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if (!isImgMime($favicon)) {
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$favicon = '';
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}
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}
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}
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return ($favicon != '' && file_put_contents($dest, $favicon) > 0) ||
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@copy(DEFAULT_FAVICON, $dest);
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}
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