remote.php 5.3 KB

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  1. <?php
  2. /**
  3. * @copyright Copyright (c) 2016, ownCloud, Inc.
  4. *
  5. * @author Brice Maron <brice@bmaron.net>
  6. * @author Christopher Schäpers <kondou@ts.unde.re>
  7. * @author Joas Schilling <coding@schilljs.com>
  8. * @author Jörn Friedrich Dreyer <jfd@butonic.de>
  9. * @author Lukas Reschke <lukas@statuscode.ch>
  10. * @author Robin Appelman <robin@icewind.nl>
  11. * @author Robin McCorkell <robin@mccorkell.me.uk>
  12. * @author Thomas Müller <thomas.mueller@tmit.eu>
  13. * @author Vincent Petry <pvince81@owncloud.com>
  14. *
  15. * @license AGPL-3.0
  16. *
  17. * This code is free software: you can redistribute it and/or modify
  18. * it under the terms of the GNU Affero General Public License, version 3,
  19. * as published by the Free Software Foundation.
  20. *
  21. * This program is distributed in the hope that it will be useful,
  22. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  24. * GNU Affero General Public License for more details.
  25. *
  26. * You should have received a copy of the GNU Affero General Public License, version 3,
  27. * along with this program. If not, see <http://www.gnu.org/licenses/>
  28. *
  29. */
  30. use OCA\DAV\Connector\Sabre\ExceptionLoggerPlugin;
  31. use Sabre\DAV\Exception\ServiceUnavailable;
  32. use Sabre\DAV\Server;
  33. /**
  34. * Class RemoteException
  35. * Dummy exception class to be use locally to identify certain conditions
  36. * Will not be logged to avoid DoS
  37. */
  38. class RemoteException extends Exception {
  39. }
  40. /**
  41. * @param Exception | Error $e
  42. */
  43. function handleException($e) {
  44. $request = \OC::$server->getRequest();
  45. // in case the request content type is text/xml - we assume it's a WebDAV request
  46. $isXmlContentType = strpos($request->getHeader('Content-Type'), 'text/xml');
  47. if ($isXmlContentType === 0) {
  48. // fire up a simple server to properly process the exception
  49. $server = new Server();
  50. if (!($e instanceof RemoteException)) {
  51. // we shall not log on RemoteException
  52. $server->addPlugin(new ExceptionLoggerPlugin('webdav', \OC::$server->getLogger()));
  53. }
  54. $server->on('beforeMethod', function () use ($e) {
  55. if ($e instanceof RemoteException) {
  56. switch ($e->getCode()) {
  57. case OC_Response::STATUS_SERVICE_UNAVAILABLE:
  58. throw new ServiceUnavailable($e->getMessage());
  59. case OC_Response::STATUS_NOT_FOUND:
  60. throw new \Sabre\DAV\Exception\NotFound($e->getMessage());
  61. }
  62. }
  63. $class = get_class($e);
  64. $msg = $e->getMessage();
  65. throw new ServiceUnavailable("$class: $msg");
  66. });
  67. $server->exec();
  68. } else {
  69. $statusCode = OC_Response::STATUS_INTERNAL_SERVER_ERROR;
  70. if ($e instanceof \OC\ServiceUnavailableException ) {
  71. $statusCode = OC_Response::STATUS_SERVICE_UNAVAILABLE;
  72. }
  73. if ($e instanceof RemoteException) {
  74. // we shall not log on RemoteException
  75. OC_Response::setStatus($e->getCode());
  76. OC_Template::printErrorPage($e->getMessage());
  77. } else {
  78. \OC::$server->getLogger()->logException($e, ['app' => 'remote']);
  79. OC_Response::setStatus($statusCode);
  80. OC_Template::printExceptionErrorPage($e);
  81. }
  82. }
  83. }
  84. /**
  85. * @param $service
  86. * @return string
  87. */
  88. function resolveService($service) {
  89. $services = [
  90. 'webdav' => 'dav/appinfo/v1/webdav.php',
  91. 'dav' => 'dav/appinfo/v2/remote.php',
  92. 'caldav' => 'dav/appinfo/v1/caldav.php',
  93. 'calendar' => 'dav/appinfo/v1/caldav.php',
  94. 'carddav' => 'dav/appinfo/v1/carddav.php',
  95. 'contacts' => 'dav/appinfo/v1/carddav.php',
  96. 'files' => 'dav/appinfo/v1/webdav.php',
  97. ];
  98. if (isset($services[$service])) {
  99. return $services[$service];
  100. }
  101. return \OC::$server->getConfig()->getAppValue('core', 'remote_' . $service);
  102. }
  103. try {
  104. require_once 'lib/base.php';
  105. // All resources served via the DAV endpoint should have the strictest possible
  106. // policy. Exempted from this is the SabreDAV browser plugin which overwrites
  107. // this policy with a softer one if debug mode is enabled.
  108. header("Content-Security-Policy: default-src 'none';");
  109. if (\OCP\Util::needUpgrade()) {
  110. // since the behavior of apps or remotes are unpredictable during
  111. // an upgrade, return a 503 directly
  112. throw new RemoteException('Service unavailable', OC_Response::STATUS_SERVICE_UNAVAILABLE);
  113. }
  114. $request = \OC::$server->getRequest();
  115. $pathInfo = $request->getPathInfo();
  116. if ($pathInfo === false || $pathInfo === '') {
  117. throw new RemoteException('Path not found', OC_Response::STATUS_NOT_FOUND);
  118. }
  119. if (!$pos = strpos($pathInfo, '/', 1)) {
  120. $pos = strlen($pathInfo);
  121. }
  122. $service=substr($pathInfo, 1, $pos-1);
  123. $file = resolveService($service);
  124. if(is_null($file)) {
  125. throw new RemoteException('Path not found', OC_Response::STATUS_NOT_FOUND);
  126. }
  127. // force language as given in the http request
  128. \OC::$server->getL10NFactory()->setLanguageFromRequest();
  129. $file=ltrim($file, '/');
  130. $parts=explode('/', $file, 2);
  131. $app=$parts[0];
  132. // Load all required applications
  133. \OC::$REQUESTEDAPP = $app;
  134. OC_App::loadApps(array('authentication'));
  135. OC_App::loadApps(array('filesystem', 'logging'));
  136. switch ($app) {
  137. case 'core':
  138. $file = OC::$SERVERROOT .'/'. $file;
  139. break;
  140. default:
  141. if (!\OC::$server->getAppManager()->isInstalled($app)) {
  142. throw new RemoteException('App not installed: ' . $app);
  143. }
  144. OC_App::loadApp($app);
  145. $file = OC_App::getAppPath($app) .'/'. $parts[1];
  146. break;
  147. }
  148. $baseuri = OC::$WEBROOT . '/remote.php/'.$service.'/';
  149. require_once $file;
  150. } catch (Exception $ex) {
  151. handleException($ex);
  152. } catch (Error $e) {
  153. handleException($e);
  154. }