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- <?php
- /**
- * @copyright Copyright (c) 2016 Joas Schilling <coding@schilljs.com>
- *
- * @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 <http://www.gnu.org/licenses/>.
- *
- */
-
- namespace OCA\WorkflowEngine\Check;
-
- use OCA\WorkflowEngine\Entity\File;
- use OCP\Files\IMimeTypeDetector;
- use OCP\Files\Storage\IStorage;
- use OCP\IL10N;
- use OCP\IRequest;
- use OCP\WorkflowEngine\IFileCheck;
-
- class FileMimeType extends AbstractStringCheck implements IFileCheck {
- use TFileCheck {
- setFileInfo as _setFileInfo;
- }
-
- /** @var array */
- protected $mimeType;
-
- /** @var IRequest */
- protected $request;
-
- /** @var IMimeTypeDetector */
- protected $mimeTypeDetector;
-
- /**
- * @param IL10N $l
- * @param IRequest $request
- * @param IMimeTypeDetector $mimeTypeDetector
- */
- public function __construct(IL10N $l, IRequest $request, IMimeTypeDetector $mimeTypeDetector) {
- parent::__construct($l);
- $this->request = $request;
- $this->mimeTypeDetector = $mimeTypeDetector;
- }
-
- /**
- * @param IStorage $storage
- * @param string $path
- * @param bool $isDir
- */
- public function setFileInfo(IStorage $storage, string $path, bool $isDir = false): void {
- $this->_setFileInfo($storage, $path, $isDir);
- if (!isset($this->mimeType[$this->storage->getId()][$this->path])
- || $this->mimeType[$this->storage->getId()][$this->path] === '') {
- if ($isDir) {
- $this->mimeType[$this->storage->getId()][$this->path] = 'httpd/unix-directory';
- } else {
- $this->mimeType[$this->storage->getId()][$this->path] = null;
- }
- }
- }
-
- /**
- * The mimetype is only cached if the file exists. Otherwise files access
- * control will cache "application/octet-stream" for all the target node on:
- * rename, move, copy and all other methods which create a new item
- *
- * To check this:
- * 1. Add an automated tagging rule which tags on mimetype NOT "httpd/unix-directory"
- * 2. Add an access control rule which checks for any mimetype
- * 3. Create a folder and rename it, the folder should not be tagged, but it is
- *
- * @param string $storageId
- * @param string|null $path
- * @param string $mimeType
- * @return string
- */
- protected function cacheAndReturnMimeType(string $storageId, ?string $path, string $mimeType): string {
- if ($path !== null && $this->storage->file_exists($path)) {
- $this->mimeType[$storageId][$path] = $mimeType;
- }
-
- return $mimeType;
- }
-
- /**
- * Make sure that even though the content based check returns an application/octet-stream can still be checked based on mimetypemappings of their extension
- *
- * @param string $operator
- * @param string $value
- * @return bool
- */
- public function executeCheck($operator, $value) {
- $actualValue = $this->getActualValue();
- $plainMimetypeResult = $this->executeStringCheck($operator, $value, $actualValue);
- if ($actualValue === 'httpd/unix-directory') {
- return $plainMimetypeResult;
- }
- $detectMimetypeBasedOnFilenameResult = $this->executeStringCheck($operator, $value, $this->mimeTypeDetector->detectPath($this->path));
- return $plainMimetypeResult || $detectMimetypeBasedOnFilenameResult;
- }
-
- /**
- * @return string
- */
- protected function getActualValue() {
- if ($this->mimeType[$this->storage->getId()][$this->path] !== null) {
- return $this->mimeType[$this->storage->getId()][$this->path];
- }
-
- if ($this->storage->is_dir($this->path)) {
- return $this->cacheAndReturnMimeType($this->storage->getId(), $this->path, 'httpd/unix-directory');
- }
-
- if ($this->storage->file_exists($this->path)) {
- $path = $this->storage->getLocalFile($this->path);
- $mimeType = $this->mimeTypeDetector->detectContent($path);
- return $this->cacheAndReturnMimeType($this->storage->getId(), $this->path, $mimeType);
- }
-
- if ($this->isWebDAVRequest() || $this->isPublicWebDAVRequest()) {
- // Creating a folder
- if ($this->request->getMethod() === 'MKCOL') {
- return 'httpd/unix-directory';
- }
- }
-
- // We do not cache this, as the file did not exist yet.
- // In case it does in the future, we will check with detectContent()
- // again to get the real mimetype of the content, rather than
- // guessing it from the path.
- return $this->mimeTypeDetector->detectPath($this->path);
- }
-
- /**
- * @return bool
- */
- protected function isWebDAVRequest() {
- return substr($this->request->getScriptName(), 0 - strlen('/remote.php')) === '/remote.php' && (
- $this->request->getPathInfo() === '/webdav' ||
- strpos($this->request->getPathInfo(), '/webdav/') === 0 ||
- $this->request->getPathInfo() === '/dav/files' ||
- strpos($this->request->getPathInfo(), '/dav/files/') === 0 ||
- $this->request->getPathInfo() === '/dav/uploads' ||
- strpos($this->request->getPathInfo(), '/dav/uploads/') === 0
- );
- }
-
- /**
- * @return bool
- */
- protected function isPublicWebDAVRequest() {
- return substr($this->request->getScriptName(), 0 - strlen('/public.php')) === '/public.php' && (
- $this->request->getPathInfo() === '/webdav' ||
- strpos($this->request->getPathInfo(), '/webdav/') === 0
- );
- }
-
- public function supportedEntities(): array {
- return [ File::class ];
- }
-
- public function isAvailableForScope(int $scope): bool {
- return true;
- }
- }
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