File size: 4,760 Bytes
38b4eff | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | <?php
use OC\ServiceUnavailableException;
use OCP\IConfig;
use OCP\Util;
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
require_once __DIR__ . '/lib/versioncheck.php';
use OCA\DAV\Connector\Sabre\ExceptionLoggerPlugin;
use OCP\App\IAppManager;
use OCP\IRequest;
use OCP\Template\ITemplateManager;
use Psr\Log\LoggerInterface;
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 {
}
function handleException(Exception|Error $e): void {
try {
$request = \OCP\Server::get(IRequest::class);
// 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', \OCP\Server::get(LoggerInterface::class)));
}
$server->on('beforeMethod:*', function () use ($e): void {
if ($e instanceof RemoteException) {
switch ($e->getCode()) {
case 503:
throw new ServiceUnavailable($e->getMessage());
case 404:
throw new \Sabre\DAV\Exception\NotFound($e->getMessage());
}
}
$class = get_class($e);
$msg = $e->getMessage();
throw new ServiceUnavailable("$class: $msg");
});
$server->exec();
} else {
$statusCode = 500;
if ($e instanceof ServiceUnavailableException) {
$statusCode = 503;
}
if ($e instanceof RemoteException) {
// we shall not log on RemoteException
\OCP\Server::get(ITemplateManager::class)->printErrorPage($e->getMessage(), '', $e->getCode());
} else {
\OCP\Server::get(LoggerInterface::class)->error($e->getMessage(), ['app' => 'remote','exception' => $e]);
\OCP\Server::get(ITemplateManager::class)->printExceptionErrorPage($e, $statusCode);
}
}
} catch (\Exception $e) {
\OCP\Server::get(ITemplateManager::class)->printExceptionErrorPage($e, 500);
}
}
/**
* @param string $service
* @return string
*/
function resolveService($service) {
$services = [
'webdav' => 'dav/appinfo/v1/webdav.php',
'dav' => 'dav/appinfo/v2/remote.php',
'caldav' => 'dav/appinfo/v1/caldav.php',
'calendar' => 'dav/appinfo/v1/caldav.php',
'carddav' => 'dav/appinfo/v1/carddav.php',
'contacts' => 'dav/appinfo/v1/carddav.php',
'files' => 'dav/appinfo/v1/webdav.php',
'direct' => 'dav/appinfo/v2/direct.php',
];
if (isset($services[$service])) {
return $services[$service];
}
return \OCP\Server::get(IConfig::class)->getAppValue('core', 'remote_' . $service);
}
try {
require_once __DIR__ . '/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 (Util::needUpgrade()) {
// since the behavior of apps or remotes are unpredictable during
// an upgrade, return a 503 directly
throw new RemoteException('Service unavailable', 503);
}
$request = \OCP\Server::get(IRequest::class);
$pathInfo = $request->getPathInfo();
if ($pathInfo === false || $pathInfo === '') {
throw new RemoteException('Path not found', 404);
}
if (!$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', 404);
}
$file = ltrim($file, '/');
$parts = explode('/', $file, 2);
$app = $parts[0];
// Load all required applications
\OC::$REQUESTEDAPP = $app;
$appManager = \OCP\Server::get(IAppManager::class);
$appManager->loadApps(['authentication']);
$appManager->loadApps(['extended_authentication']);
$appManager->loadApps(['filesystem', 'logging']);
switch ($app) {
case 'core':
$file = OC::$SERVERROOT . '/' . $file;
break;
default:
if (!$appManager->isEnabledForUser($app)) {
throw new RemoteException('App not installed: ' . $app);
}
$appManager->loadApp($app);
$file = $appManager->getAppPath($app) . '/' . ($parts[1] ?? '');
break;
}
$baseuri = OC::$WEBROOT . '/remote.php/' . $service . '/';
require_once $file;
} catch (Exception $ex) {
handleException($ex);
} catch (Error $e) {
handleException($e);
}
|