1 files changed, 84 insertions, 0 deletions
diff --git a/apps/files_sharing/lib/middleware/sharingcheckmiddleware.php b/apps/files_sharing/lib/middleware/sharingcheckmiddleware.php
new file mode 100644
index 00000000000..af79cd9e94a
--- /dev/null
+++ b/apps/files_sharing/lib/middleware/sharingcheckmiddleware.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * @author Lukas Reschke
+ * @copyright 2014 Lukas Reschke lukas@owncloud.com
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCA\Files_Sharing\Middleware;
+
+use OCP\AppFramework\IApi;
+use \OCP\AppFramework\Middleware;
+use OCP\AppFramework\Http\TemplateResponse;
+use OCP\IAppConfig;
+
+/**
+ * Checks whether the "sharing check" is enabled
+ *
+ * @package OCA\Files_Sharing\Middleware
+ */
+class SharingCheckMiddleware extends Middleware {
+
+	/** @var string */
+	protected $appName;
+	/** @var IAppConfig */
+	protected $appConfig;
+	/** @var IApi */
+	protected $api;
+
+	/***
+	 * @param string $appName
+	 * @param IAppConfig $appConfig
+	 * @param IApi $api
+	 */
+	public function __construct($appName,
+								IAppConfig $appConfig,
+								IApi $api) {
+		$this->appName = $appName;
+		$this->appConfig = $appConfig;
+		$this->api = $api;
+	}
+
+	/**
+	 * Check if sharing is enabled before the controllers is executed
+	 */
+	public function beforeController($controller, $methodName) {
+		if(!$this->isSharingEnabled()) {
+			throw new \Exception('Sharing is disabled.');
+		}
+	}
+
+	/**
+	 * Return 404 page in case of an exception
+	 * @param \OCP\AppFramework\Controller $controller
+	 * @param string $methodName
+	 * @param \Exception $exception
+	 * @return TemplateResponse
+	 */
+	public function afterException($controller, $methodName, \Exception $exception){
+		return new TemplateResponse('core', '404', array(), 'guest');
+	}
+
+	/**
+	 * Check whether sharing is enabled
+	 * @return bool
+	 */
+	private function isSharingEnabled() {
+		// FIXME: This check is done here since the route is globally defined and not inside the files_sharing app
+		// Check whether the sharing application is enabled
+		if(!$this->api->isAppEnabled($this->appName)) {
+			return false;
+		}
+
+		// Check whether public sharing is enabled
+		if($this->appConfig->getValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
+			return false;
+		}
+
+		return true;
+	}
+
+}