owncloud/core

<?php
/**
 * @author Björn Schießle <bjoern@schiessle.org>
 * @author Christopher Schäpers <kondou@ts.unde.re>
 * @author Jörn Friedrich Dreyer <jfd@butonic.de>
 * @author Lukas Reschke <lukas@statuscode.ch>
 * @author Philipp Schaffrath <github@philippschaffrath.de>
 * @author Robin Appelman <icewind@owncloud.com>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 * @author Victor Dubiniuk <dubiniuk@owncloud.com>
 * @author Vincent Petry <pvince81@owncloud.com>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @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/>
 *
 */
try {
    require_once __DIR__ . '/lib/base.php';
    if (\OCP\Util::needUpgrade()) {
        // since the behavior of apps or remotes are unpredictable during
        // an upgrade, return a 503 directly
        OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
        OC_Template::printErrorPage('Service unavailable');
        exit;
    }

    $request = \OC::$server->getRequest();
    OC::checkMaintenanceMode($request);
    OC::checkSingleUserMode(true);
    $pathInfo = $request->getPathInfo();

    if (!$pathInfo && $request->getParam('service', '') === '') {
        \http_response_code(404);
        exit;
    } elseif ($request->getParam('service', '')) {
        $service = $request->getParam('service', '');
    } else {
        $pathInfo = \trim($pathInfo, '/');
        list($service) = \explode('/', $pathInfo);
    }
    $file = \OC::$server->getConfig()->getAppValue('core', 'public_' . \strip_tags($service));
    if ($file === null) {
        \http_response_code(404);
        exit;
    }

    $parts = \explode('/', $file, 2);
    $app = $parts[0];

    // Load all required applications
    \OC::$REQUESTEDAPP = $app;
    OC_App::loadApps(['authentication']);
    OC_App::loadApps(['filesystem', 'logging']);

    if (!\OC::$server->getAppManager()->isInstalled($app)) {
        throw new Exception('App not installed: ' . $app);
    }
    OC_App::loadApp($app);
    OC_User::setIncognitoMode(true);

    $baseuri = OC::$WEBROOT . '/public.php/' . $service . '/';

    require_once OC_App::getAppPath($app) . '/' . $parts[1];
} catch (\Throwable $ex) {
    try {
        if ($ex instanceof \OC\ServiceUnavailableException) {
            OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
        } else {
            OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
        }
        //show the user a detailed error page
        \OC::$server->getLogger()->logException($ex, ['app' => 'public']);
        OC_Template::printExceptionErrorPage($ex);
    } catch (\Throwable $ex2) {
        // log through the crashLog
        \header("{$_SERVER['SERVER_PROTOCOL']} 599 Broken");
        \OC::crashLog($ex);
        \OC::crashLog($ex2);
    }
}