friendica/src/Module/ParseUrl.php

<?php
/**
 * @copyright Copyright (C) 2010-2021, the Friendica project
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

namespace Friendica\Module;

use Friendica\BaseModule;
use Friendica\Content\Text\BBCode;
use Friendica\Core\Hook;
use Friendica\Core\Session;
use Friendica\Core\System;
use Friendica\Network\HTTPException\BadRequestException;
use Friendica\Util;

class ParseUrl extends BaseModule
{
	public function rawContent()
	{
		if (!Session::isAuthenticated()) {
			throw new \Friendica\Network\HTTPException\ForbiddenException();
		}

		$format = '';
		$title = '';
		$description = '';
		$ret = ['success' => false, 'contentType' => ''];

		if (!empty($_GET['binurl']) && Util\Strings::isHex($_GET['binurl'])) {
			$url = trim(hex2bin($_GET['binurl']));
		} elseif (!empty($_GET['url'])) {
			$url = trim($_GET['url']);
			// fallback in case no url is valid
		} else {
			throw new BadRequestException('No url given');
		}

		if (!empty($_GET['title'])) {
			$title = strip_tags(trim($_GET['title']));
		}

		if (!empty($_GET['description'])) {
			$description = strip_tags(trim($_GET['description']));
		}

		if (!empty($_GET['tags'])) {
			$arr_tags = Util\ParseUrl::convertTagsToArray($_GET['tags']);
			if (count($arr_tags)) {
				$str_tags = "\n" . implode(' ', $arr_tags) . "\n";
			}
		}

		if (isset($_GET['format']) && $_GET['format'] == 'json') {
			$format = 'json';
		}

		// Add url scheme if it is missing
		$arrurl = parse_url($url);
		if (empty($arrurl['scheme'])) {
			if (!empty($arrurl['host'])) {
				$url = 'http:' . $url;
			} else {
				$url = 'http://' . $url;
			}
		}

		$arr = ['url' => $url, 'format' => $format, 'text' => null];

		Hook::callAll('parse_link', $arr);

		if ($arr['text']) {
			if ($format == 'json') {
				System::jsonExit($arr['text']);
			} else {
				echo $arr['text'];
				exit();
			}
		}

		if ($format == 'json') {
			$siteinfo = Util\ParseUrl::getSiteinfoCached($url);

			if (in_array($siteinfo['type'], ['image', 'video', 'audio'])) {
				switch ($siteinfo['type']) {
					case 'video':
						$content_type = 'video';
						break;
					case 'audio':
						$content_type = 'audio';
						break;
					default:
						$content_type = 'image';
						break;
				}

				$ret['contentType'] = $content_type;
				$ret['data'] = ['url' => $url];
				$ret['success'] = true;
			} else {
				unset($siteinfo['keywords']);

				$ret['data'] = $siteinfo;
				$ret['contentType'] = 'attachment';
				$ret['success'] = true;
			}

			System::jsonExit($ret);
		} else {
			echo BBCode::embedURL($url, empty($_GET['noAttachment']), $title, $description, $_GET['tags'] ?? '');
			exit();
		}
	}
}