1 files changed, 132 insertions, 0 deletions
diff --git a/core/Controller/PreviewController.php b/core/Controller/PreviewController.php
new file mode 100644
index 00000000000..4b9ba8b60d4
--- /dev/null
+++ b/core/Controller/PreviewController.php
@@ -0,0 +1,132 @@
+<?php
+/**
+ * @copyright Copyright (c) 2016, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @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 OC\Core\Controller;
+
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Files\File;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\AppFramework\Http\FileDisplayResponse;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
+use OCP\IPreview;
+use OCP\IRequest;
+
+class PreviewController extends Controller {
+
+	/** @var string */
+	private $userId;
+
+	/** @var IRootFolder */
+	private $root;
+
+	/** @var IPreview */
+	private $preview;
+
+	/** @var ITimeFactory */
+	private $timeFactory;
+
+	/**
+	 * PreviewController constructor.
+	 *
+	 * @param string $appName
+	 * @param IRequest $request
+	 * @param IPreview $preview
+	 * @param IRootFolder $root
+	 * @param string $userId
+	 */
+	public function __construct($appName,
+								IRequest $request,
+								IPreview $preview,
+								IRootFolder $root,
+								$userId,
+								ITimeFactory $timeFactory
+	) {
+		parent::__construct($appName, $request);
+
+		$this->preview = $preview;
+		$this->root = $root;
+		$this->userId = $userId;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * @NoAdminRequired
+	 * @NoCSRFRequired
+	 *
+	 * @param string $file
+	 * @param int $x
+	 * @param int $y
+	 * @param bool $a
+	 * @param bool $forceIcon
+	 * @param string $mode
+	 * @return DataResponse|Http\FileDisplayResponse
+	 */
+	public function getPreview(
+		$file = '',
+		$x = 32,
+		$y = 32,
+		$a = false,
+		$forceIcon = true,
+		$mode = 'fill') {
+
+		if ($file === '' || $x === 0 || $y === 0) {
+			return new DataResponse([], Http::STATUS_BAD_REQUEST);
+		}
+
+		try {
+			$userFolder = $this->root->getUserFolder($this->userId);
+			$file = $userFolder->get($file);
+		} catch (NotFoundException $e) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		if (!($file instanceof File) || (!$forceIcon && !$this->preview->isAvailable($file))) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		} else if (!$file->isReadable()) {
+			return new DataResponse([], Http::STATUS_FORBIDDEN);
+		}
+
+		try {
+			$f = $this->preview->getPreview($file, $x, $y, !$a, $mode);
+			$response = new FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]);
+
+			// Let cache this!
+			$response->addHeader('Pragma', 'public');
+
+			// Cache previews for 24H
+			$response->cacheFor(3600 * 24);
+			$expires = new \DateTime();
+			$expires->setTimestamp($this->timeFactory->getTime());
+			$expires->add(new \DateInterval('P1D'));
+			$response->addHeader('Expires', $expires->format(\DateTime::RFC2822));
+
+			return $response;
+		} catch (NotFoundException $e) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+	}
+}