3 * @copyright Copyright (C) 2010-2022, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Core\Storage\Type;
25 use Friendica\Core\Storage\Exception\ReferenceStorageException;
26 use Friendica\Core\Storage\Capability\ICanReadFromStorage;
27 use Friendica\Util\HTTPSignature;
30 * External resource storage class
32 * This class is used to load external resources, like images.
33 * Is not intended to be selectable by admins as default storage class.
35 class ExternalResource implements ICanReadFromStorage
37 const NAME = 'ExternalResource';
42 public function get(string $reference): string
44 $data = json_decode($reference);
45 if (empty($data->url)) {
46 throw new ReferenceStorageException(sprintf('Invalid reference %s, cannot retrieve URL', $reference));
49 $parts = parse_url($data->url);
50 if (empty($parts['scheme']) || empty($parts['host'])) {
51 throw new ReferenceStorageException(sprintf('Invalid reference %s, cannot extract scheme and host', $reference));
55 $fetchResult = HTTPSignature::fetchRaw($data->url, $data->uid, ['accept_content' => []]);
56 } catch (Exception $exception) {
57 throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference), $exception->getCode(), $exception);
59 if ($fetchResult->isSuccess()) {
60 return $fetchResult->getBody();
62 throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference), $fetchResult->getReturnCode(), new Exception($fetchResult->getBody()));
69 public function __toString(): string
77 public static function getName(): string