173 lines
5.4 KiB
PHP
173 lines
5.4 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016 Joas Schilling <coding@schilljs.com>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\WorkflowEngine\Check;
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use OCA\WorkflowEngine\Entity\File;
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use OCP\Files\IMimeTypeDetector;
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use OCP\Files\Storage\IStorage;
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use OCP\IL10N;
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use OCP\IRequest;
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use OCP\WorkflowEngine\IFileCheck;
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class FileMimeType extends AbstractStringCheck implements IFileCheck {
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use TFileCheck {
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setFileInfo as _setFileInfo;
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}
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/** @var array */
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protected $mimeType;
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/** @var IRequest */
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protected $request;
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/** @var IMimeTypeDetector */
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protected $mimeTypeDetector;
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/**
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* @param IL10N $l
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* @param IRequest $request
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* @param IMimeTypeDetector $mimeTypeDetector
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*/
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public function __construct(IL10N $l, IRequest $request, IMimeTypeDetector $mimeTypeDetector) {
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parent::__construct($l);
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$this->request = $request;
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$this->mimeTypeDetector = $mimeTypeDetector;
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}
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/**
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* @param IStorage $storage
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* @param string $path
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* @param bool $isDir
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*/
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public function setFileInfo(IStorage $storage, string $path, bool $isDir = false): void {
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$this->_setFileInfo($storage, $path, $isDir);
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if (!isset($this->mimeType[$this->storage->getId()][$this->path])
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|| $this->mimeType[$this->storage->getId()][$this->path] === '') {
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if ($isDir) {
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$this->mimeType[$this->storage->getId()][$this->path] = 'httpd/unix-directory';
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} else {
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$this->mimeType[$this->storage->getId()][$this->path] = null;
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}
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}
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}
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/**
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* The mimetype is only cached if the file exists. Otherwise files access
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* control will cache "application/octet-stream" for all the target node on:
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* rename, move, copy and all other methods which create a new item
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*
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* To check this:
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* 1. Add an automated tagging rule which tags on mimetype NOT "httpd/unix-directory"
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* 2. Add an access control rule which checks for any mimetype
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* 3. Create a folder and rename it, the folder should not be tagged, but it is
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*
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* @param string $storageId
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* @param string|null $path
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* @param string $mimeType
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* @return string
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*/
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protected function cacheAndReturnMimeType(string $storageId, ?string $path, string $mimeType): string {
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if ($path !== null && $this->storage->file_exists($path)) {
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$this->mimeType[$storageId][$path] = $mimeType;
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}
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return $mimeType;
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}
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/**
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* Make sure that even though the content based check returns an application/octet-stream can still be checked based on mimetypemappings of their extension
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*
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* @param string $operator
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* @param string $value
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* @return bool
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*/
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public function executeCheck($operator, $value) {
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$actualValue = $this->getActualValue();
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return $this->executeStringCheck($operator, $value, $actualValue) ||
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$this->executeStringCheck($operator, $value, $this->mimeTypeDetector->detectPath($this->path));
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}
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/**
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* @return string
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*/
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protected function getActualValue() {
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if ($this->mimeType[$this->storage->getId()][$this->path] !== null) {
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return $this->mimeType[$this->storage->getId()][$this->path];
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}
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if ($this->storage->is_dir($this->path)) {
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return $this->cacheAndReturnMimeType($this->storage->getId(), $this->path, 'httpd/unix-directory');
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}
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if ($this->storage->file_exists($this->path)) {
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$path = $this->storage->getLocalFile($this->path);
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$mimeType = $this->mimeTypeDetector->detectContent($path);
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return $this->cacheAndReturnMimeType($this->storage->getId(), $this->path, $mimeType);
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}
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if ($this->isWebDAVRequest() || $this->isPublicWebDAVRequest()) {
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// Creating a folder
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if ($this->request->getMethod() === 'MKCOL') {
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return 'httpd/unix-directory';
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}
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}
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// We do not cache this, as the file did not exist yet.
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// In case it does in the future, we will check with detectContent()
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// again to get the real mimetype of the content, rather than
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// guessing it from the path.
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return $this->mimeTypeDetector->detectPath($this->path);
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}
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/**
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* @return bool
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*/
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protected function isWebDAVRequest() {
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return substr($this->request->getScriptName(), 0 - strlen('/remote.php')) === '/remote.php' && (
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$this->request->getPathInfo() === '/webdav' ||
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strpos($this->request->getPathInfo(), '/webdav/') === 0 ||
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$this->request->getPathInfo() === '/dav/files' ||
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strpos($this->request->getPathInfo(), '/dav/files/') === 0 ||
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$this->request->getPathInfo() === '/dav/uploads' ||
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strpos($this->request->getPathInfo(), '/dav/uploads/') === 0
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);
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}
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/**
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* @return bool
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*/
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protected function isPublicWebDAVRequest() {
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return substr($this->request->getScriptName(), 0 - strlen('/public.php')) === '/public.php' && (
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$this->request->getPathInfo() === '/webdav' ||
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strpos($this->request->getPathInfo(), '/webdav/') === 0
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);
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}
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public function supportedEntities(): array {
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return [ File::class ];
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}
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public function isAvailableForScope(int $scope): bool {
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return true;
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}
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}
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