diff options
Diffstat (limited to 'lib/private/Preview/Bitmap.php')
| -rw-r--r-- | lib/private/Preview/Bitmap.php | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/lib/private/Preview/Bitmap.php b/lib/private/Preview/Bitmap.php index 84c7b4a8968..a3d5fbfd4ec 100644 --- a/lib/private/Preview/Bitmap.php +++ b/lib/private/Preview/Bitmap.php @@ -1,28 +1,9 @@ <?php + /** - * @copyright Copyright (c) 2016, ownCloud, Inc. - * - * @author Arthur Schiwon <blizzz@arthur-schiwon.de> - * @author Joas Schilling <coding@schilljs.com> - * @author Morris Jobke <hey@morrisjobke.de> - * @author Olivier Paroz <github@oparoz.com> - * @author Robin Appelman <robin@icewind.nl> - * @author Roeland Jago Douma <roeland@famdouma.nl> - * - * @license AGPL-3.0 - * - * This code is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License, version 3, - * as published by the Free Software Foundation. - * - * 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, version 3, - * along with this program. If not, see <http://www.gnu.org/licenses/> - * + * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors + * SPDX-FileCopyrightText: 2016 ownCloud, Inc. + * SPDX-License-Identifier: AGPL-3.0-only */ namespace OC\Preview; @@ -38,6 +19,18 @@ use Psr\Log\LoggerInterface; */ abstract class Bitmap extends ProviderV2 { /** + * List of MIME types that this preview provider is allowed to process. + * + * These should correspond to the MIME types *identified* by Imagemagick + * for files to be processed by this provider. These do / will not + * necessarily need to match the MIME types stored in the database + * (which are identified by IMimeTypeDetector). + * + * @return string Regular expression + */ + abstract protected function getAllowedMimeTypes(): string; + + /** * {@inheritDoc} */ public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage { @@ -68,7 +61,7 @@ abstract class Bitmap extends ProviderV2 { //new bitmap image object $image = new \OCP\Image(); - $image->loadFromData((string) $bp); + $image->loadFromData((string)$bp); //check if image object is valid return $image->valid() ? $image : null; } @@ -86,10 +79,19 @@ abstract class Bitmap extends ProviderV2 { * @param int $maxY * * @return \Imagick + * + * @throws \Exception */ private function getResizedPreview($tmpPath, $maxX, $maxY) { $bp = new Imagick(); + // Validate mime type + $bp->pingImage($tmpPath . '[0]'); + $mimeType = $bp->getImageMimeType(); + if (!preg_match($this->getAllowedMimeTypes(), $mimeType)) { + throw new \Exception('File mime type does not match the preview provider: ' . $mimeType); + } + // Layer 0 contains either the bitmap or a flat representation of all vector layers $bp->readImage($tmpPath . '[0]'); |