nextcloud/lib/private/connector/sabre/maintenanceplugin.php

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<?php
/**
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* @author Bart Visscher <bartv@thisnet.nl>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
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* @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 OC\Connector\Sabre;
class MaintenancePlugin extends \Sabre\DAV\ServerPlugin
{
/**
* Reference to main server object
*
* @var \Sabre\DAV\Server
*/
private $server;
/**
* 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'), 10);
}
/**
* This method is called before any HTTP method and returns http status code 503
* in case the system is in maintenance mode.
*
* @throws \Sabre\DAV\Exception\ServiceUnavailable
* @internal param string $method
* @return bool
*/
public function checkMaintenanceMode() {
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if (\OC::$server->getSystemConfig()->getValue('singleuser', false)) {
throw new \Sabre\DAV\Exception\ServiceUnavailable();
}
if (\OC_Config::getValue('maintenance', false)) {
throw new \Sabre\DAV\Exception\ServiceUnavailable();
}
if (\OC::checkUpgrade(false)) {
throw new \Sabre\DAV\Exception\ServiceUnavailable('Upgrade needed');
}
return true;
}
}