server/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php

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<?php
/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Joas Schilling <coding@schilljs.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
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* @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 OCA\DAV\Connector\Sabre\Exception\PasswordLoginForbidden;
use OCP\Files\StorageNotAvailableException;
use OCP\ILogger;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\InvalidSyncToken;
use Sabre\DAV\Exception\NotAuthenticated;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAV\Exception\NotImplemented;
use Sabre\DAV\Exception\PreconditionFailed;
use Sabre\DAV\Exception\ServiceUnavailable;
class ExceptionLoggerPlugin extends \Sabre\DAV\ServerPlugin {
protected $nonFatalExceptions = [
NotAuthenticated::class => true,
// If tokenauth can throw this exception (which is basically as
// NotAuthenticated. So not fatal.
PasswordLoginForbidden::class => true,
// basically a NotAuthenticated
InvalidSyncToken::class => true,
// the sync client uses this to find out whether files exist,
// so it is not always an error, log it as debug
NotFound::class => true,
// this one mostly happens when the same file is uploaded at
// exactly the same time from two clients, only one client
// wins, the second one gets "Precondition failed"
PreconditionFailed::class => true,
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// forbidden can be expected when trying to upload to
// read-only folders for example
Forbidden::class => true,
// Happens when an external storage or federated share is temporarily
// not available
StorageNotAvailableException::class => true,
// happens if some a client uses the wrong method for a given URL
// the error message itself is visible on the client side anyways
NotImplemented::class => true,
];
/** @var string */
private $appName;
/** @var ILogger */
private $logger;
/**
* @param string $loggerAppName app name to use when logging
* @param ILogger $logger
*/
public function __construct($loggerAppName, $logger) {
$this->appName = $loggerAppName;
$this->logger = $logger;
}
/**
* 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) {
$server->on('exception', array($this, 'logException'), 10);
}
/**
* Log exception
*
*/
public function logException(\Exception $ex) {
$exceptionClass = get_class($ex);
$level = \OCP\Util::FATAL;
if (isset($this->nonFatalExceptions[$exceptionClass]) ||
(
$exceptionClass === ServiceUnavailable::class &&
$ex->getMessage() === 'System in maintenance mode.'
)
) {
$level = \OCP\Util::DEBUG;
}
$this->logger->logException($ex, [
'app' => $this->appName,
'level' => $level,
]);
}
}