3 * @copyright Copyright (C) 2010-2023, 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\Logger;
26 use Friendica\Core\Storage\Exception\ReferenceStorageException;
27 use Friendica\Core\Storage\Capability\ICanReadFromStorage;
28 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
29 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
30 use Friendica\Util\HTTPSignature;
33 * External resource storage class
35 * This class is used to load external resources, like images.
36 * Is not intended to be selectable by admins as default storage class.
38 class ExternalResource implements ICanReadFromStorage
40 const NAME = 'ExternalResource';
45 public function get(string $reference): string
47 $data = json_decode($reference);
48 if (empty($data->url)) {
49 throw new ReferenceStorageException(sprintf('Invalid reference %s, cannot retrieve URL', $reference));
52 $parts = parse_url($data->url);
53 if (empty($parts['scheme']) || empty($parts['host'])) {
54 throw new ReferenceStorageException(sprintf('Invalid reference %s, cannot extract scheme and host', $reference));
58 $fetchResult = HTTPSignature::fetchRaw($data->url, $data->uid, [HttpClientOptions::ACCEPT_CONTENT => [HttpClientAccept::IMAGE]]);
59 } catch (Exception $exception) {
60 throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference), $exception->getCode(), $exception);
62 if (!empty($fetchResult) && $fetchResult->isSuccess()) {
63 Logger::debug('Got picture', ['Content-Type' => $fetchResult->getHeader('Content-Type'), 'uid' => $data->uid, 'url' => $data->url]);
64 return $fetchResult->getBody();
66 throw new ReferenceStorageException(sprintf('External resource failed to get %s', $reference), $fetchResult->getReturnCode(), new Exception($fetchResult->getBody()));
73 public function __toString(): string
81 public static function getName(): string