mirror of
https://github.com/friendica/friendica
synced 2025-03-28 14:01:25 +00:00
356 lines
10 KiB
PHP
356 lines
10 KiB
PHP
<?php
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// Copyright (C) 2010-2024, the Friendica project
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// SPDX-FileCopyrightText: 2010-2024 the Friendica project
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//
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// SPDX-License-Identifier: AGPL-3.0-or-later
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namespace Friendica\Content;
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use DOMDocument;
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use DOMElement;
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use DOMXPath;
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use Exception;
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use Friendica\Content\Text\BBCode;
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use Friendica\Core\Cache\Enum\Duration;
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use Friendica\Core\Hook;
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use Friendica\Core\Renderer;
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use Friendica\Database\Database;
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use Friendica\Database\DBA;
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use Friendica\DI;
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use Friendica\Network\HTTPClient\Client\HttpClientAccept;
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use Friendica\Network\HTTPClient\Client\HttpClientOptions;
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use Friendica\Network\HTTPClient\Client\HttpClientRequest;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Network;
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use Friendica\Util\ParseUrl;
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use Friendica\Util\Proxy;
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use Friendica\Util\Strings;
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/**
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* Handles all OEmbed content fetching and replacement
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*
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* OEmbed is a standard used to allow an embedded representation of a URL on
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* third party sites
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*
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* @see https://oembed.com
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*/
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class OEmbed
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{
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/**
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* Get data from an URL to embed its content.
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*
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* @param string $embedurl The URL from which the data should be fetched.
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*
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* @return \Friendica\Object\OEmbed
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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private static function fetchURL(string $embedurl): \Friendica\Object\OEmbed
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{
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$embedurl = trim($embedurl, '\'"');
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$appHelper = DI::appHelper();
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$cache_key = 'oembed:' . $appHelper->getThemeInfoValue('videowidth') . ':' . $embedurl;
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$condition = ['url' => Strings::normaliseLink($embedurl), 'maxwidth' => $appHelper->getThemeInfoValue('videowidth')];
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$oembed_record = DBA::selectFirst('oembed', ['content'], $condition);
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if (DBA::isResult($oembed_record)) {
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$json_string = $oembed_record['content'];
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} else {
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$json_string = DI::cache()->get($cache_key);
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}
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// These media files should now be caught in bbcode.php
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// left here as a fallback in case this is called from another source
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$noexts = ['mp3', 'mp4', 'ogg', 'ogv', 'oga', 'ogm', 'webm'];
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$ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION);
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$oembed = new \Friendica\Object\OEmbed($embedurl);
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if ($json_string) {
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$oembed->parseJSON($json_string);
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} else {
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$json_string = '';
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if (!in_array($ext, $noexts)) {
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// try oembed autodiscovery
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$html_text = DI::httpClient()->fetch($embedurl, HttpClientAccept::HTML, 15, '', HttpClientRequest::SITEINFO);
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if (!empty($html_text)) {
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$dom = new DOMDocument();
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if (@$dom->loadHTML($html_text)) {
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$xpath = new DOMXPath($dom);
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foreach (
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$xpath->query("//link[@type='application/json+oembed'] | //link[@type='text/json+oembed']")
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as $link)
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{
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/** @var DOMElement $link */
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$href = $link->getAttributeNode('href')->nodeValue;
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// Both Youtube and Vimeo output OEmbed endpoint URL with HTTP
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// but their OEmbed endpoint is only accessible by HTTPS ¯\_(ツ)_/¯
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$href = str_replace(['http://www.youtube.com/', 'http://player.vimeo.com/'],
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['https://www.youtube.com/', 'https://player.vimeo.com/'], $href);
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$result = DI::httpClient()->get($href . '&maxwidth=' . $appHelper->getThemeInfoValue('videowidth'), HttpClientAccept::DEFAULT, [HttpClientOptions::REQUEST => HttpClientRequest::SITEINFO]);
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if ($result->isSuccess()) {
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$json_string = $result->getBodyString();
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break;
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}
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}
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}
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}
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}
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$json_string = trim($json_string);
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if (!$json_string || $json_string[0] != '{') {
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$json_string = '{"type":"error"}';
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}
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$oembed->parseJSON($json_string);
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if (!empty($oembed->type) && $oembed->type != 'error') {
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DBA::insert('oembed', [
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'url' => Strings::normaliseLink($embedurl),
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'maxwidth' => $appHelper->getThemeInfoValue('videowidth'),
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'content' => $json_string,
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'created' => DateTimeFormat::utcNow()
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], Database::INSERT_UPDATE);
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$cache_ttl = Duration::DAY;
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} else {
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$cache_ttl = Duration::FIVE_MINUTES;
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}
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DI::cache()->set($cache_key, $json_string, $cache_ttl);
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}
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// Always embed the SSL version
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if (!empty($oembed->html)) {
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$oembed->html = str_replace(['http://www.youtube.com/', 'http://player.vimeo.com/'], ['https://www.youtube.com/', 'https://player.vimeo.com/'], $oembed->html);
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}
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// Improve the OEmbed data with data from OpenGraph, Twitter cards and other sources
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$data = ParseUrl::getSiteinfoCached($embedurl);
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if (($oembed->type == 'error') && empty($data['title']) && empty($data['text'])) {
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return $oembed;
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}
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if (!self::isAllowedURL($embedurl) || ($oembed->type == 'error')) {
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$oembed->html = '';
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$oembed->type = $data['type'];
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if ($oembed->type == 'photo') {
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if (!empty($data['images'])) {
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$oembed->url = $data['images'][0]['src'];
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$oembed->width = $data['images'][0]['width'];
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$oembed->height = $data['images'][0]['height'];
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} else {
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$oembed->type = 'link';
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}
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}
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}
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if (!empty($data['title'])) {
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$oembed->title = $data['title'];
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}
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if (!empty($data['text'])) {
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$oembed->description = $data['text'];
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}
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if (!empty($data['publisher_name'])) {
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$oembed->provider_name = $data['publisher_name'];
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}
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if (!empty($data['publisher_url'])) {
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$oembed->provider_url = $data['publisher_url'];
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}
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if (!empty($data['author_name'])) {
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$oembed->author_name = $data['author_name'];
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}
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if (!empty($data['author_url'])) {
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$oembed->author_url = $data['author_url'];
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}
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if (!empty($data['images']) && ($oembed->type != 'photo')) {
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$oembed->thumbnail_url = $data['images'][0]['src'];
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$oembed->thumbnail_width = $data['images'][0]['width'];
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$oembed->thumbnail_height = $data['images'][0]['height'];
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}
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Hook::callAll('oembed_fetch_url', $embedurl);
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return $oembed;
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}
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/**
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* Returns a formatted string from OEmbed object
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*
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* @param \Friendica\Object\OEmbed $oembed
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* @param int $uriid
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* @return string
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*/
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private static function formatObject(\Friendica\Object\OEmbed $oembed, int $uriid): string
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{
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$ret = '<div class="oembed ' . $oembed->type . '">';
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switch ($oembed->type) {
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case 'video':
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if ($oembed->thumbnail_url) {
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$tw = (isset($oembed->thumbnail_width) && intval($oembed->thumbnail_width)) ? $oembed->thumbnail_width : 200;
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$th = (isset($oembed->thumbnail_height) && intval($oembed->thumbnail_height)) ? $oembed->thumbnail_height : 180;
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// make sure we don't attempt divide by zero, fallback is a 1:1 ratio
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$tr = (($th) ? $tw / $th : 1);
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$th = 120;
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$tw = $th * $tr;
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$tpl = Renderer::getMarkupTemplate('oembed_video.tpl');
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$ret .= Renderer::replaceMacros($tpl, [
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'$embedurl' => $oembed->embed_url,
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'$escapedhtml' => base64_encode($oembed->html),
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'$tw' => $tw,
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'$th' => $th,
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'$turl' => BBCode::proxyUrl($oembed->thumbnail_url, BBCode::INTERNAL, $uriid, Proxy::SIZE_SMALL),
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]);
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} else {
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$ret .= Proxy::proxifyHtml($oembed->html, $uriid);
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}
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break;
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case 'photo':
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$ret .= '<img width="' . $oembed->width . '" src="' . BBCode::proxyUrl($oembed->url, BBCode::INTERNAL, $uriid, Proxy::SIZE_MEDIUM) . '">';
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break;
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case 'link':
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break;
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case 'rich':
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$ret .= Proxy::proxifyHtml($oembed->html, $uriid);
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break;
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}
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// add link to source if not present in "rich" type
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if ($oembed->type != 'rich' || !strpos($oembed->html, $oembed->embed_url)) {
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$ret .= '<h4>';
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if (!empty($oembed->title)) {
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if (!empty($oembed->provider_name)) {
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$ret .= $oembed->provider_name . ": ";
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}
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$ret .= '<a href="' . $oembed->embed_url . '" rel="oembed">' . $oembed->title . '</a>';
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if (!empty($oembed->author_name)) {
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$ret .= ' (' . $oembed->author_name . ')';
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}
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} elseif (!empty($oembed->provider_name) || !empty($oembed->author_name)) {
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$embedlink = "";
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if (!empty($oembed->provider_name)) {
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$embedlink .= $oembed->provider_name;
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}
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if (!empty($oembed->author_name)) {
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if ($embedlink != "") {
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$embedlink .= ": ";
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}
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$embedlink .= $oembed->author_name;
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}
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if (trim($embedlink) == "") {
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$embedlink = $oembed->embed_url;
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}
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$ret .= '<a href="' . $oembed->embed_url . '" rel="oembed">' . $embedlink . '</a>';
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} else {
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$ret .= '<a href="' . $oembed->embed_url . '" rel="oembed">' . $oembed->embed_url . '</a>';
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}
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$ret .= "</h4>";
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if ($oembed->type == 'link') {
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if (!empty($oembed->thumbnail_url)) {
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$ret .= '<img width="' . $oembed->width . '" src="' . BBCode::proxyUrl($oembed->thumbnail_url, BBCode::INTERNAL, $uriid, Proxy::SIZE_MEDIUM) . '">';
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}
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if (!empty($oembed->description)) {
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$ret .= '<p>' . $oembed->description . '</p>';
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}
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}
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} elseif (!strpos($oembed->html, $oembed->embed_url)) {
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// add <a> for html2bbcode conversion
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$ret .= '<a href="' . $oembed->embed_url . '" rel="oembed">' . $oembed->title . '</a>';
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}
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$ret .= '</div>';
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$test = Proxy::proxifyHtml($ret, $uriid);
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return str_replace("\n", "", $ret);
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}
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/**
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* Converts BBCode to HTML code
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*
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* @param string $text
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* @param int $uriid
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* @return string
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*/
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public static function BBCode2HTML(string $text, int $uriid): string
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{
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if (!preg_match_all("/\[embed\](.+?)\[\/embed\]/is", $text, $matches, PREG_SET_ORDER)) {
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return $text;
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}
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foreach ($matches as $match) {
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$data = self::fetchURL($match[1]);
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$text = str_replace($match[0], self::formatObject($data, $uriid), $text);
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}
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return $text;
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}
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/**
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* Determines if rich content OEmbed is allowed for the provided URL
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*
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* @param string $url
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* @return boolean
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function isAllowedURL(string $url): bool
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{
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if (!DI::config()->get('system', 'no_oembed_rich_content')) {
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return true;
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}
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$domain = parse_url($url, PHP_URL_HOST);
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if (empty($domain)) {
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return false;
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}
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$allowed = DI::config()->get('system', 'allowed_oembed', '');
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if (empty($allowed)) {
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return false;
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}
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return Network::isDomainMatch($domain, explode(',', $allowed));
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}
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/**
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* Returns a formatted HTML code from given URL and sets optional title
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*
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* @param string $url URL to fetch
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* @param string $title title (default: what comes from OEmbed object)
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* @param int $uriid
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* @return string Formatted HTML
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*/
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public static function getHTML(string $url, string $title, int $uriid): string
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{
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$o = self::fetchURL($url);
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if (!is_object($o) || property_exists($o, 'type') && $o->type == 'error') {
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throw new Exception('OEmbed failed for URL: ' . $url);
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}
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if (!empty($title)) {
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$o->title = $title;
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}
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$html = self::formatObject($o, $uriid);
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return $html;
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}
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}
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