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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Brice Maron <brice@bmaron.net>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @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/>
*
*/
use OCA\DAV\Connector\Sabre\ExceptionLoggerPlugin;
use Sabre\DAV\Exception\ServiceUnavailable;
use Sabre\DAV\Server;
/**
* Class RemoteException
* Dummy exception class to be use locally to identify certain conditions
* Will not be logged to avoid DoS
*/
class RemoteException extends Exception {
}
/**
* @param Exception | Error $e
*/
function handleException($e) {
$request = \OC::$server->getRequest();
// in case the request content type is text/xml - we assume it's a WebDAV request
$isXmlContentType = strpos($request->getHeader('Content-Type'), 'text/xml');
if ($isXmlContentType === 0) {
// fire up a simple server to properly process the exception
$server = new Server();
if (!($e instanceof RemoteException)) {
// we shall not log on RemoteException
$server->addPlugin(new ExceptionLoggerPlugin('webdav', \OC::$server->getLogger()));
}
$server->on('beforeMethod', function () use ($e) {
if ($e instanceof RemoteException) {
switch ($e->getCode()) {
case OC_Response::STATUS_SERVICE_UNAVAILABLE:
throw new ServiceUnavailable($e->getMessage());
case OC_Response::STATUS_NOT_FOUND:
throw new \Sabre\DAV\Exception\NotFound($e->getMessage());
}
}
$class = get_class($e);
$msg = $e->getMessage();
throw new ServiceUnavailable("$class: $msg");
});
$server->exec();
} else {
$statusCode = OC_Response::STATUS_INTERNAL_SERVER_ERROR;
if ($e instanceof \OC\ServiceUnavailableException ) {
$statusCode = OC_Response::STATUS_SERVICE_UNAVAILABLE;
}
if ($e instanceof RemoteException) {
// we shall not log on RemoteException
OC_Response::setStatus($e->getCode());
OC_Template::printErrorPage($e->getMessage());
} else {
\OC::$server->getLogger()->logException($e, ['app' => 'remote']);
OC_Response::setStatus($statusCode);
OC_Template::printExceptionErrorPage($e);
}
}
}
/**
* @param $service
* @return string
*/
function resolveService($service) {
$services = [
'webdav' => 'dav/appinfo/v1/webdav.php',
'dav' => 'dav/appinfo/v2/remote.php',
'caldav' => 'dav/appinfo/v1/caldav.php',
'calendar' => 'dav/appinfo/v1/caldav.php',
'carddav' => 'dav/appinfo/v1/carddav.php',
'contacts' => 'dav/appinfo/v1/carddav.php',
'files' => 'dav/appinfo/v1/webdav.php',
];
if (isset($services[$service])) {
return $services[$service];
}
return \OC::$server->getConfig()->getAppValue('core', 'remote_' . $service);
}
try {
require_once 'lib/base.php';
// All resources served via the DAV endpoint should have the strictest possible
// policy. Exempted from this is the SabreDAV browser plugin which overwrites
// this policy with a softer one if debug mode is enabled.
header("Content-Security-Policy: default-src 'none';");
if (\OCP\Util::needUpgrade()) {
// since the behavior of apps or remotes are unpredictable during
// an upgrade, return a 503 directly
throw new RemoteException('Service unavailable', OC_Response::STATUS_SERVICE_UNAVAILABLE);
}
$request = \OC::$server->getRequest();
$pathInfo = $request->getPathInfo();
if ($pathInfo === false || $pathInfo === '') {
throw new RemoteException('Path not found', OC_Response::STATUS_NOT_FOUND);
}
if (!$pos = strpos($pathInfo, '/', 1)) {
$pos = strlen($pathInfo);
}
$service=substr($pathInfo, 1, $pos-1);
$file = resolveService($service);
if(is_null($file)) {
throw new RemoteException('Path not found', OC_Response::STATUS_NOT_FOUND);
}
// force language as given in the http request
\OC::$server->getL10NFactory()->setLanguageFromRequest();
$file=ltrim($file, '/');
$parts=explode('/', $file, 2);
$app=$parts[0];
// Load all required applications
\OC::$REQUESTEDAPP = $app;
OC_App::loadApps(array('authentication'));
OC_App::loadApps(array('filesystem', 'logging'));
switch ($app) {
case 'core':
$file = OC::$SERVERROOT .'/'. $file;
break;
default:
if (!\OC::$server->getAppManager()->isInstalled($app)) {
throw new RemoteException('App not installed: ' . $app);
}
OC_App::loadApp($app);
$file = OC_App::getAppPath($app) .'/'. $parts[1];
break;
}
$baseuri = OC::$WEBROOT . '/remote.php/'.$service.'/';
require_once $file;
} catch (Exception $ex) {
handleException($ex);
} catch (Error $e) {
handleException($e);
}
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