1 files changed, 92 insertions, 0 deletions
diff --git a/apps/dav/lib/connector/sabre/maintenanceplugin.php b/apps/dav/lib/connector/sabre/maintenanceplugin.php
new file mode 100644
index 00000000000..b9b261fbe05
--- /dev/null
+++ b/apps/dav/lib/connector/sabre/maintenanceplugin.php
@@ -0,0 +1,92 @@
+<?php
+/**
+ * @author Bart Visscher <bartv@thisnet.nl>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Vincent Petry <pvince81@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Connector\Sabre;
+
+use OCP\IConfig;
+use Sabre\DAV\Exception\ServiceUnavailable;
+use Sabre\DAV\ServerPlugin;
+
+class MaintenancePlugin extends ServerPlugin {
+
+	/** @var IConfig */
+	private $config;
+
+	/**
+	 * Reference to main server object
+	 *
+	 * @var Server
+	 */
+	private $server;
+
+	/**
+	 * @param IConfig $config
+	 */
+	public function __construct(IConfig $config = null) {
+		$this->config = $config;
+		if (is_null($config)) {
+			$this->config = \OC::$server->getConfig();
+		}
+	}
+
+
+	/**
+	 * This initializes the plugin.
+	 *
+	 * This function is called by \Sabre\DAV\Server, after
+	 * addPlugin is called.
+	 *
+	 * This method should set up the required event subscriptions.
+	 *
+	 * @param \Sabre\DAV\Server $server
+	 * @return void
+	 */
+	public function initialize(\Sabre\DAV\Server $server) {
+		$this->server = $server;
+		$this->server->on('beforeMethod', array($this, 'checkMaintenanceMode'), 1);
+	}
+
+	/**
+	 * This method is called before any HTTP method and returns http status code 503
+	 * in case the system is in maintenance mode.
+	 *
+	 * @throws ServiceUnavailable
+	 * @return bool
+	 */
+	public function checkMaintenanceMode() {
+		if ($this->config->getSystemValue('singleuser', false)) {
+			throw new ServiceUnavailable('System in single user mode.');
+		}
+		if ($this->config->getSystemValue('maintenance', false)) {
+			throw new ServiceUnavailable('System in maintenance mode.');
+		}
+		if (\OC::checkUpgrade(false)) {
+			throw new ServiceUnavailable('Upgrade needed');
+		}
+
+		return true;
+	}
+}