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<?php
/**
* @copyright Copyright (c) 2016, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Julius Härtl <jus@bitgrid.net>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Kate Döen <kate.doeen@nextcloud.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\Files_Sharing\Controller;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\FileDisplayResponse;
use OCP\AppFramework\PublicShareController;
use OCP\Constants;
use OCP\Files\Folder;
use OCP\Files\NotFoundException;
use OCP\IPreview;
use OCP\IRequest;
use OCP\ISession;
use OCP\Share\Exceptions\ShareNotFound;
use OCP\Share\IManager as ShareManager;
use OCP\Share\IShare;
class PublicPreviewController extends PublicShareController {
/** @var ShareManager */
private $shareManager;
/** @var IPreview */
private $previewManager;
/** @var IShare */
private $share;
public function __construct(string $appName,
IRequest $request,
ShareManager $shareManger,
ISession $session,
IPreview $previewManager) {
parent::__construct($appName, $request, $session);
$this->shareManager = $shareManger;
$this->previewManager = $previewManager;
}
protected function getPasswordHash(): string {
return $this->share->getPassword();
}
public function isValidToken(): bool {
try {
$this->share = $this->shareManager->getShareByToken($this->getToken());
return true;
} catch (ShareNotFound $e) {
return false;
}
}
protected function isPasswordProtected(): bool {
return $this->share->getPassword() !== null;
}
/**
* @PublicPage
* @NoCSRFRequired
*
* Get a preview for a shared file
*
* @param string $token Token of the share
* @param string $file File in the share
* @param int $x Width of the preview
* @param int $y Height of the preview
* @param bool $a Whether to not crop the preview
* @return FileDisplayResponse<Http::STATUS_OK, array{Content-Type: string}>|DataResponse<Http::STATUS_BAD_REQUEST|Http::STATUS_FORBIDDEN|Http::STATUS_NOT_FOUND, array<empty>, array{}>
*
* 200: Preview returned
* 400: Getting preview is not possible
* 403: Getting preview is not allowed
* 404: Share or preview not found
*/
public function getPreview(
string $token,
string $file = '',
int $x = 32,
int $y = 32,
$a = false
) {
if ($token === '' || $x === 0 || $y === 0) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
try {
$share = $this->shareManager->getShareByToken($token);
} catch (ShareNotFound $e) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
}
if (($share->getPermissions() & Constants::PERMISSION_READ) === 0) {
return new DataResponse([], Http::STATUS_FORBIDDEN);
}
$attributes = $share->getAttributes();
if ($attributes !== null && $attributes->getAttribute('permissions', 'download') === false) {
return new DataResponse([], Http::STATUS_FORBIDDEN);
}
try {
$node = $share->getNode();
if ($node instanceof Folder) {
$file = $node->get($file);
} else {
$file = $node;
}
$f = $this->previewManager->getPreview($file, $x, $y, !$a);
$response = new FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]);
$response->cacheFor(3600 * 24);
return $response;
} catch (NotFoundException $e) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
} catch (\InvalidArgumentException $e) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
}
/**
* @PublicPage
* @NoCSRFRequired
* @NoSameSiteCookieRequired
*
* Get a direct link preview for a shared file
*
* @param string $token Token of the share
* @return FileDisplayResponse<Http::STATUS_OK, array{Content-Type: string}>|DataResponse<Http::STATUS_BAD_REQUEST|Http::STATUS_FORBIDDEN|Http::STATUS_NOT_FOUND, array<empty>, array{}>
*
* 200: Preview returned
* 400: Getting preview is not possible
* 403: Getting preview is not allowed
* 404: Share or preview not found
*/
public function directLink(string $token) {
// No token no image
if ($token === '') {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
// No share no image
try {
$share = $this->shareManager->getShareByToken($token);
} catch (ShareNotFound $e) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
}
// No permissions no image
if (($share->getPermissions() & Constants::PERMISSION_READ) === 0) {
return new DataResponse([], Http::STATUS_FORBIDDEN);
}
// Password protected shares have no direct link!
if ($share->getPassword() !== null) {
return new DataResponse([], Http::STATUS_FORBIDDEN);
}
$attributes = $share->getAttributes();
if ($attributes !== null && $attributes->getAttribute('permissions', 'download') === false) {
return new DataResponse([], Http::STATUS_FORBIDDEN);
}
try {
$node = $share->getNode();
if ($node instanceof Folder) {
// Direct link only works for single files
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
$f = $this->previewManager->getPreview($node, -1, -1, false);
$response = new FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]);
$response->cacheFor(3600 * 24);
return $response;
} catch (NotFoundException $e) {
return new DataResponse([], Http::STATUS_NOT_FOUND);
} catch (\InvalidArgumentException $e) {
return new DataResponse([], Http::STATUS_BAD_REQUEST);
}
}
}
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