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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Brice Maron <brice@bmaron.net>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <vincent@nextcloud.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/>
*
*/
require_once __DIR__ . '/lib/versioncheck.php';
use OCA\DAV\Connector\Sabre\ExceptionLoggerPlugin;
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 {
}
/**
* @param Exception|Error $e
*/
function handleException($e) {
try {
$request = \OC::$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->get(LoggerInterface::class)));
}
$server->on('beforeMethod:*', function () use ($e) {
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 \OC\ServiceUnavailableException) {
$statusCode = 503;
}
if ($e instanceof RemoteException) {
// we shall not log on RemoteException
OC_Template::printErrorPage($e->getMessage(), '', $e->getCode());
} else {
\OC::$server->get(LoggerInterface::class)->error($e->getMessage(), ['app' => 'remote','exception' => $e]);
OC_Template::printExceptionErrorPage($e, $statusCode);
}
}
} catch (\Exception $e) {
OC_Template::printExceptionErrorPage($e, 500);
}
}
/**
* @param $service
* @return string
*/
function resolveService($service) {
$services = [
'webdav' => 'dav/appinfo/v1/webdav.php',
'dav' => 'dav/appinfo/v2/remote.php',
'caldav' => 'dav/appinfo/v1/caldav.php',
'calendar' => 'dav/appinfo/v1/caldav.php',
'carddav' => 'dav/appinfo/v1/carddav.php',
'contacts' => 'dav/appinfo/v1/carddav.php',
'files' => 'dav/appinfo/v1/webdav.php',
'direct' => 'dav/appinfo/v2/direct.php',
];
if (isset($services[$service])) {
return $services[$service];
}
return \OC::$server->getConfig()->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 (\OCP\Util::needUpgrade()) {
// since the behavior of apps or remotes are unpredictable during
// an upgrade, return a 503 directly
throw new RemoteException('Service unavailable', 503);
}
$request = \OC::$server->getRequest();
$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 = $app;
OC_App::loadApps(['authentication']);
OC_App::loadApps(['extended_authentication']);
OC_App::loadApps(['filesystem', 'logging']);
switch ($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);
}
|
