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COPYING-README

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  • base.php 32.44 KiB
    <?php
    /**
     * ownCloud
     *
     * @author Frank Karlitschek
     * @copyright 2012 Frank Karlitschek frank@owncloud.org
     *
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
     * License as published by the Free Software Foundation; either
     * version 3 of the License, or any later version.
     *
     * This library 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 along with this library.  If not, see <http://www.gnu.org/licenses/>.
     *
     */
    
    require_once 'public/constants.php';
    
    /**
     * Class that is a namespace for all global OC variables
     * No, we can not put this class in its own file because it is used by
     * OC_autoload!
     */
    class OC {
    	/**
    	 * Associative array for autoloading. classname => filename
    	 */
    	public static $CLASSPATH = array();
    	/**
    	 * The installation path for owncloud on the server (e.g. /srv/http/owncloud)
    	 */
    	public static $SERVERROOT = '';
    	/**
    	 * the current request path relative to the owncloud root (e.g. files/index.php)
    	 */
    	private static $SUBURI = '';
    	/**
    	 * the owncloud root path for http requests (e.g. owncloud/)
    	 */
    	public static $WEBROOT = '';
    	/**
    	 * The installation path of the 3rdparty folder on the server (e.g. /srv/http/owncloud/3rdparty)
    	 */
    	public static $THIRDPARTYROOT = '';
    	/**
    	 * the root path of the 3rdparty folder for http requests (e.g. owncloud/3rdparty)
    	 */
    	public static $THIRDPARTYWEBROOT = '';
    	/**
    	 * The installation path array of the apps folder on the server (e.g. /srv/http/owncloud) 'path' and
    	 * web path in 'url'
    	 */
    	public static $APPSROOTS = array();
    
    	public static $configDir;
    
    	/**
    	 * requested app
    	 */
    	public static $REQUESTEDAPP = '';
    
    	/**
    	 * check if ownCloud runs in cli mode
    	 */
    	public static $CLI = false;
    
    	/**
    	 * @var \OC\Autoloader $loader
    	 */
    	public static $loader = null;
    
    	/**
    	 * @var \OC\Server
    	 */
    	public static $server = null;
    
    	public static function initPaths() {
    		// calculate the root directories
    		OC::$SERVERROOT = str_replace("\\", '/', substr(__DIR__, 0, -4));
    
    		// ensure we can find OC_Config
    		set_include_path(
    			OC::$SERVERROOT . '/lib' . PATH_SEPARATOR .
    			get_include_path()
    		);
    
    		if(defined('PHPUNIT_CONFIG_DIR')) {
    			self::$configDir = OC::$SERVERROOT . '/' . PHPUNIT_CONFIG_DIR . '/';
    		} elseif(defined('PHPUNIT_RUN') and PHPUNIT_RUN and is_dir(OC::$SERVERROOT . '/tests/config/')) {
    			self::$configDir = OC::$SERVERROOT . '/tests/config/';
    		} else {
    			self::$configDir = OC::$SERVERROOT . '/config/';
    		}
    		OC_Config::$object = new \OC\Config(self::$configDir);
    
    		OC::$SUBURI = str_replace("\\", "/", substr(realpath($_SERVER["SCRIPT_FILENAME"]), strlen(OC::$SERVERROOT)));
    		$scriptName = OC_Request::scriptName();
    		if (substr($scriptName, -1) == '/') {
    			$scriptName .= 'index.php';
    			//make sure suburi follows the same rules as scriptName
    			if (substr(OC::$SUBURI, -9) != 'index.php') {
    				if (substr(OC::$SUBURI, -1) != '/') {
    					OC::$SUBURI = OC::$SUBURI . '/';
    				}
    				OC::$SUBURI = OC::$SUBURI . 'index.php';
    			}
    		}
    
    		if (substr($scriptName, 0 - strlen(OC::$SUBURI)) === OC::$SUBURI) {
    			OC::$WEBROOT = substr($scriptName, 0, 0 - strlen(OC::$SUBURI));
    
    			if (OC::$WEBROOT != '' && OC::$WEBROOT[0] !== '/') {
    				OC::$WEBROOT = '/' . OC::$WEBROOT;
    			}
    		} else {
    			// The scriptName is not ending with OC::$SUBURI
    			// This most likely means that we are calling from CLI.
    			// However some cron jobs still need to generate
    			// a web URL, so we use overwritewebroot as a fallback.
    			OC::$WEBROOT = OC_Config::getValue('overwritewebroot', '');
    		}
    
    		// search the 3rdparty folder
    		OC::$THIRDPARTYROOT = OC_Config::getValue('3rdpartyroot', null);
    		OC::$THIRDPARTYWEBROOT = OC_Config::getValue('3rdpartyurl', null);
    		
    		if (empty(OC::$THIRDPARTYROOT) && empty(OC::$THIRDPARTYWEBROOT)) {
    			if (file_exists(OC::$SERVERROOT . '/3rdparty')) {
    				OC::$THIRDPARTYROOT = OC::$SERVERROOT;
    				OC::$THIRDPARTYWEBROOT = OC::$WEBROOT;
    			} elseif (file_exists(OC::$SERVERROOT . '/../3rdparty')) {
    				OC::$THIRDPARTYWEBROOT = rtrim(dirname(OC::$WEBROOT), '/');
    				OC::$THIRDPARTYROOT = rtrim(dirname(OC::$SERVERROOT), '/');
    			}
    		}
    		if (empty(OC::$THIRDPARTYROOT) || !file_exists(OC::$THIRDPARTYROOT)) {
    			echo('3rdparty directory not found! Please put the ownCloud 3rdparty'
    				. ' folder in the ownCloud folder or the folder above.'
    				. ' You can also configure the location in the config.php file.');
    			return;
    		}
    		
    		// search the apps folder
    		$config_paths = OC_Config::getValue('apps_paths', array());
    		if (!empty($config_paths)) {
    			foreach ($config_paths as $paths) {
    				if (isset($paths['url']) && isset($paths['path'])) {
    					$paths['url'] = rtrim($paths['url'], '/');
    					$paths['path'] = rtrim($paths['path'], '/');
    					OC::$APPSROOTS[] = $paths;
    				}
    			}
    		} elseif (file_exists(OC::$SERVERROOT . '/apps')) {
    			OC::$APPSROOTS[] = array('path' => OC::$SERVERROOT . '/apps', 'url' => '/apps', 'writable' => true);
    		} elseif (file_exists(OC::$SERVERROOT . '/../apps')) {
    			OC::$APPSROOTS[] = array(
    				'path' => rtrim(dirname(OC::$SERVERROOT), '/') . '/apps',
    				'url' => '/apps',
    				'writable' => true
    			);
    		}
    
    		if (empty(OC::$APPSROOTS)) {
    			throw new Exception('apps directory not found! Please put the ownCloud apps folder in the ownCloud folder'
    				. ' or the folder above. You can also configure the location in the config.php file.');
    		}
    		$paths = array();
    		foreach (OC::$APPSROOTS as $path) {
    			$paths[] = $path['path'];
    		}
    
    		// set the right include path
    		set_include_path(
    			OC::$SERVERROOT . '/lib/private' . PATH_SEPARATOR .
    			OC::$SERVERROOT . '/config' . PATH_SEPARATOR .
    			OC::$THIRDPARTYROOT . '/3rdparty' . PATH_SEPARATOR .
    			implode(PATH_SEPARATOR, $paths) . PATH_SEPARATOR .
    			get_include_path() . PATH_SEPARATOR .
    			OC::$SERVERROOT
    		);
    	}
    
    	public static function checkConfig() {
    		$l = \OC::$server->getL10N('lib');
    
    		// Create config in case it does not already exists
    		$configFilePath = self::$configDir .'/config.php';
    		if(!file_exists($configFilePath)) {
    			@touch($configFilePath);
    		}
    
    		// Check if config is writable
    		$configFileWritable = is_writable($configFilePath);
    		if (!$configFileWritable && !OC_Helper::isReadOnlyConfigEnabled()
    			|| !$configFileWritable && \OCP\Util::needUpgrade()) {
    			if (self::$CLI) {
    				echo $l->t('Cannot write into "config" directory!')."\n";
    				echo $l->t('This can usually be fixed by giving the webserver write access to the config directory')."\n";
    				echo "\n";
    				echo $l->t('See %s', array(\OC_Helper::linkToDocs('admin-dir_permissions')))."\n";
    				exit;
    			} else {
    				OC_Template::printErrorPage(
    					$l->t('Cannot write into "config" directory!'),
    					$l->t('This can usually be fixed by '
    					. '%sgiving the webserver write access to the config directory%s.',
    					 array('<a href="'.\OC_Helper::linkToDocs('admin-dir_permissions').'" target="_blank">', '</a>'))
    				);
    			}
    		}
    	}
    
    	public static function checkInstalled() {
    		// Redirect to installer if not installed
    		if (!\OC::$server->getSystemConfig()->getValue('installed', false) && OC::$SUBURI != '/index.php') {
    			if (OC::$CLI) {
    				throw new Exception('Not installed');
    			} else {
    				$url = 'http://' . $_SERVER['SERVER_NAME'] . OC::$WEBROOT . '/index.php';
    				header('Location: ' . $url);
    			}
    			exit();
    		}
    	}
    
    	public static function checkSSL() {
    		// redirect to https site if configured
    		if (\OC::$server->getSystemConfig()->getValue('forcessl', false)) {
    			// Default HSTS policy
    			$header = 'Strict-Transport-Security: max-age=31536000';
    
    			// If SSL for subdomains is enabled add "; includeSubDomains" to the header
    			if(\OC::$server->getSystemConfig()->getValue('forceSSLforSubdomains', false)) {
    				$header .= '; includeSubDomains';
    			}
    			header($header);
    			ini_set('session.cookie_secure', 'on');
    			if (OC_Request::serverProtocol() <> 'https' and !OC::$CLI) {
    				$url = 'https://' . OC_Request::serverHost() . OC_Request::requestUri();
    				header("Location: $url");
    				exit();
    			}
    		} else {
    			// Invalidate HSTS headers
    			if (OC_Request::serverProtocol() === 'https') {
    				header('Strict-Transport-Security: max-age=0');
    			}
    		}
    	}
    
    	public static function checkMaintenanceMode() {
    		// Allow ajax update script to execute without being stopped
    		if (\OC::$server->getSystemConfig()->getValue('maintenance', false) && OC::$SUBURI != '/core/ajax/update.php') {
    			// send http status 503
    			header('HTTP/1.1 503 Service Temporarily Unavailable');
    			header('Status: 503 Service Temporarily Unavailable');
    			header('Retry-After: 120');
    
    			// render error page
    			$tmpl = new OC_Template('', 'update.user', 'guest');
    			OC_Util::addscript('maintenance-check');
    			$tmpl->printPage();
    			die();
    		}
    	}
    
    	public static function checkSingleUserMode() {
    		$user = OC_User::getUserSession()->getUser();
    		$group = OC_Group::getManager()->get('admin');
    		if ($user && \OC::$server->getSystemConfig()->getValue('singleuser', false) && !$group->inGroup($user)) {
    			// send http status 503
    			header('HTTP/1.1 503 Service Temporarily Unavailable');
    			header('Status: 503 Service Temporarily Unavailable');
    			header('Retry-After: 120');
    
    			// render error page
    			$tmpl = new OC_Template('', 'singleuser.user', 'guest');
    			$tmpl->printPage();
    			die();
    		}
    	}
    
    	/**
    	 * check if the instance needs to preform an upgrade
    	 *
    	 * @return bool
    	 * @deprecated use \OCP\Util::needUpgrade() instead
    	 */
    	public static function needUpgrade() {
    		return \OCP\Util::needUpgrade();
    	}
    
    	/**
    	 * Checks if the version requires an update and shows
    	 * @param bool $showTemplate Whether an update screen should get shown
    	 * @return bool|void
    	 */
    	public static function checkUpgrade($showTemplate = true) {
    		if (\OCP\Util::needUpgrade()) {
    			$systemConfig = \OC::$server->getSystemConfig();
    			if ($showTemplate && !$systemConfig->getValue('maintenance', false)) {
    				$version = OC_Util::getVersion();
    				$oldTheme = $systemConfig->getValue('theme');
    				$systemConfig->setValue('theme', '');
    				OC_Util::addScript('config'); // needed for web root
    				OC_Util::addScript('update');
    				$tmpl = new OC_Template('', 'update.admin', 'guest');
    				$tmpl->assign('version', OC_Util::getVersionString());
    
    				// get third party apps
    				$apps = OC_App::getEnabledApps();
    				$incompatibleApps = array();
    				foreach ($apps as $appId) {
    					$info = OC_App::getAppInfo($appId);
    					if(!OC_App::isAppCompatible($version, $info)) {
    						$incompatibleApps[] = $info;
    					}
    				}
    				$tmpl->assign('appList', $incompatibleApps);
    				$tmpl->assign('productName', 'ownCloud'); // for now
    				$tmpl->assign('oldTheme', $oldTheme);
    				$tmpl->printPage();
    				exit();
    			} else {
    				return true;
    			}
    		}
    		return false;
    	}
    
    	public static function initTemplateEngine() {
    		// Add the stuff we need always
    		// TODO: read from core/js/core.json
    		OC_Util::addVendorScript('jquery/jquery.min');
    		OC_Util::addVendorScript('jquery/jquery-migrate.min');
    		OC_Util::addScript("jquery-ui-1.10.0.custom");
    		OC_Util::addScript("jquery-showpassword");
    		OC_Util::addScript("placeholders");
    		OC_Util::addScript("jquery-tipsy");
    		OC_Util::addScript("compatibility");
    		OC_Util::addVendorScript("underscore/underscore");
    		OC_Util::addScript("jquery.ocdialog");
    		OC_Util::addScript("oc-dialogs");
    		OC_Util::addScript("js");
    		OC_Util::addScript("l10n");
    		OC_Util::addTranslations("core");
    		OC_Util::addScript("octemplate");
    		OC_Util::addScript("eventsource");
    		OC_Util::addScript("config");
    		//OC_Util::addScript( "multiselect" );
    		OC_Util::addScript('search', 'result');
    		OC_Util::addScript("oc-requesttoken");
    		OC_Util::addScript("apps");
    		OC_Util::addVendorScript('snapjs/dist/latest/snap');
    		OC_Util::addVendorScript('moment/min/moment-with-locales');
    
    		// avatars
    		if (\OC::$server->getSystemConfig()->getValue('enable_avatars', true) === true) {
    			\OC_Util::addScript('placeholder');
    			\OC_Util::addVendorScript('blueimp-md5/js/md5');
    			\OC_Util::addScript('jquery.avatar');
    			\OC_Util::addScript('avatar');
    		}
    
    		OC_Util::addStyle("styles");
    		OC_Util::addStyle("header");
    		OC_Util::addStyle("mobile");
    		OC_Util::addStyle("icons");
    		OC_Util::addStyle("fonts");
    		OC_Util::addStyle("apps");
    		OC_Util::addStyle("fixes");
    		OC_Util::addStyle("multiselect");
    		OC_Util::addStyle("jquery-ui-1.10.0.custom");
    		OC_Util::addStyle("jquery-tipsy");
    		OC_Util::addStyle("jquery.ocdialog");
    	}
    
    	public static function initSession() {
    		// prevents javascript from accessing php session cookies
    		ini_set('session.cookie_httponly', '1;');
    
    		// set the cookie path to the ownCloud directory
    		$cookie_path = OC::$WEBROOT ? : '/';
    		ini_set('session.cookie_path', $cookie_path);
    
    		// Let the session name be changed in the initSession Hook
    		$sessionName = OC_Util::getInstanceId();
    
    		try {
    			// Allow session apps to create a custom session object
    			$useCustomSession = false;
    			$session = self::$server->getSession();
    			OC_Hook::emit('OC', 'initSession', array('session' => &$session, 'sessionName' => &$sessionName, 'useCustomSession' => &$useCustomSession));
    			if($useCustomSession) {
    				// use the session reference as the new Session
    				self::$server->setSession($session);
    			} else {
    				// set the session name to the instance id - which is unique
    				self::$server->setSession(new \OC\Session\Internal($sessionName));
    			}
    			// if session cant be started break with http 500 error
    		} catch (Exception $e) {
    			//show the user a detailed error page
    			OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
    			OC_Template::printExceptionErrorPage($e);
    		}
    
    		$sessionLifeTime = self::getSessionLifeTime();
    		// regenerate session id periodically to avoid session fixation
    		/**
    		 * @var \OCP\ISession $session
    		 */
    		$session = self::$server->getSession();
    		if (!$session->exists('SID_CREATED')) {
    			$session->set('SID_CREATED', time());
    		} else if (time() - $session->get('SID_CREATED') > $sessionLifeTime / 2) {
    			session_regenerate_id(true);
    			$session->set('SID_CREATED', time());
    		}
    
    		// session timeout
    		if ($session->exists('LAST_ACTIVITY') && (time() - $session->get('LAST_ACTIVITY') > $sessionLifeTime)) {
    			if (isset($_COOKIE[session_name()])) {
    				setcookie(session_name(), '', time() - 42000, $cookie_path);
    			}
    			session_unset();
    			session_destroy();
    			session_start();
    		}
    
    		$session->set('LAST_ACTIVITY', time());
    	}
    
    	/**
    	 * @return string
    	 */
    	private static function getSessionLifeTime() {
    		return \OC::$server->getConfig()->getSystemValue('session_lifetime', 60 * 60 * 24);
    	}
    
    	public static function loadAppClassPaths() {
    		foreach (OC_APP::getEnabledApps() as $app) {
    			$file = OC_App::getAppPath($app) . '/appinfo/classpath.php';
    			if (file_exists($file)) {
    				require_once $file;
    			}
    		}
    	}
    
    
    	public static function init() {
    		// register autoloader
    		$loaderStart = microtime(true);
    		require_once __DIR__ . '/autoloader.php';
    		self::$loader = new \OC\Autoloader();
    		spl_autoload_register(array(self::$loader, 'load'));
    		$loaderEnd = microtime(true);
    
    		self::initPaths();
    
    		// setup 3rdparty autoloader
    		$vendorAutoLoad = OC::$THIRDPARTYROOT . '/3rdparty/autoload.php';
    		if (file_exists($vendorAutoLoad)) {
    			require_once $vendorAutoLoad;
    		} else {
    			OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
    			OC_Template::printErrorPage('Composer autoloader not found, unable to continue.');
    		}
    
    		// setup the basic server
    		self::$server = new \OC\Server(\OC::$WEBROOT);
    		\OC::$server->getEventLogger()->log('autoloader', 'Autoloader', $loaderStart, $loaderEnd);
    		\OC::$server->getEventLogger()->start('boot', 'Initialize');
    
    		// set some stuff
    		//ob_start();
    		error_reporting(E_ALL | E_STRICT);
    		if (defined('DEBUG') && DEBUG) {
    			ini_set('display_errors', 1);
    		}
    		self::$CLI = (php_sapi_name() == 'cli');
    
    		date_default_timezone_set('UTC');
    		ini_set('arg_separator.output', '&amp;');
    
    		//try to configure php to enable big file uploads.
    		//this doesn´t work always depending on the webserver and php configuration.
    		//Let´s try to overwrite some defaults anyways
    
    		//try to set the maximum execution time to 60min
    		@set_time_limit(3600);
    		@ini_set('max_execution_time', 3600);
    		@ini_set('max_input_time', 3600);
    
    		//try to set the maximum filesize to 10G
    		@ini_set('upload_max_filesize', '10G');
    		@ini_set('post_max_size', '10G');
    		@ini_set('file_uploads', '50');
    
    		self::handleAuthHeaders();
    		self::registerAutoloaderCache();
    
    		// initialize intl fallback is necessary
    		\Patchwork\Utf8\Bootup::initIntl();
    		OC_Util::isSetLocaleWorking();
    
    		if (!defined('PHPUNIT_RUN')) {
    			OC\Log\ErrorHandler::setLogger(OC_Log::$object);
    			if (defined('DEBUG') and DEBUG) {
    				OC\Log\ErrorHandler::register(true);
    				set_exception_handler(array('OC_Template', 'printExceptionErrorPage'));
    			} else {
    				OC\Log\ErrorHandler::register();
    			}
    		}
    
    		// register the stream wrappers
    		stream_wrapper_register('fakedir', 'OC\Files\Stream\Dir');
    		stream_wrapper_register('static', 'OC\Files\Stream\StaticStream');
    		stream_wrapper_register('close', 'OC\Files\Stream\Close');
    		stream_wrapper_register('quota', 'OC\Files\Stream\Quota');
    		stream_wrapper_register('oc', 'OC\Files\Stream\OC');
    
    		\OC::$server->getEventLogger()->start('init_session', 'Initialize session');
    		OC_App::loadApps(array('session'));
    		if (!self::$CLI) {
    			self::initSession();
    		}
    		\OC::$server->getEventLogger()->end('init_session');
    		self::initTemplateEngine();
    		self::checkConfig();
    		self::checkInstalled();
    		self::checkSSL();
    		OC_Response::addSecurityHeaders();
    
    		$errors = OC_Util::checkServer(\OC::$server->getConfig());
    		if (count($errors) > 0) {
    			if (self::$CLI) {
    				foreach ($errors as $error) {
    					echo $error['error'] . "\n";
    					echo $error['hint'] . "\n\n";
    				}
    			} else {
    				OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
    				OC_Template::printGuestPage('', 'error', array('errors' => $errors));
    			}
    			exit;
    		}
    
    		//try to set the session lifetime
    		$sessionLifeTime = self::getSessionLifeTime();
    		@ini_set('gc_maxlifetime', (string)$sessionLifeTime);
    
    		$systemConfig = \OC::$server->getSystemConfig();
    
    		// User and Groups
    		if (!$systemConfig->getValue("installed", false)) {
    			self::$server->getSession()->set('user_id', '');
    		}
    
    		OC_User::useBackend(new OC_User_Database());
    		OC_Group::useBackend(new OC_Group_Database());
    
    		//setup extra user backends
    		if (!self::checkUpgrade(false)) {
    			OC_User::setupBackends();
    		}
    
    		self::registerCacheHooks();
    		self::registerFilesystemHooks();
    		self::registerPreviewHooks();
    		self::registerShareHooks();
    		self::registerLogRotate();
    		self::registerLocalAddressBook();
    
    		//make sure temporary files are cleaned up
    		$tmpManager = \OC::$server->getTempManager();
    		register_shutdown_function(array($tmpManager, 'clean'));
    
    		if ($systemConfig->getValue('installed', false) && !self::checkUpgrade(false)) {
    			if (\OC::$server->getConfig()->getAppValue('core', 'backgroundjobs_mode', 'ajax') == 'ajax') {
    				OC_Util::addScript('backgroundjobs');
    			}
    		}
    
    		// Check whether the sample configuration has been copied
    		if($systemConfig->getValue('copied_sample_config', false)) {
    			$l = \OC::$server->getL10N('lib');
    			header('HTTP/1.1 503 Service Temporarily Unavailable');
    			header('Status: 503 Service Temporarily Unavailable');
    			OC_Template::printErrorPage(
    				$l->t('Sample configuration detected'),
    				$l->t('It has been detected that the sample configuration has been copied. This can break your installation and is unsupported. Please read the documentation before performing changes on config.php')
    			);
    			return;
    		}
    
    		$host = OC_Request::insecureServerHost();
    		// if the host passed in headers isn't trusted
    		if (!OC::$CLI
    			// overwritehost is always trusted
    			&& OC_Request::getOverwriteHost() === null
    			&& !OC_Request::isTrustedDomain($host)
    		) {
    			header('HTTP/1.1 400 Bad Request');
    			header('Status: 400 Bad Request');
    
    			$tmpl = new OCP\Template('core', 'untrustedDomain', 'guest');
    			$tmpl->assign('domain', $_SERVER['SERVER_NAME']);
    			$tmpl->printPage();
    
    			exit();
    		}
    		\OC::$server->getEventLogger()->end('boot');
    	}
    
    	private static function registerLocalAddressBook() {
    		self::$server->getContactsManager()->register(function() {
    			$userManager = \OC::$server->getUserManager();
    			\OC::$server->getContactsManager()->registerAddressBook(
    				new \OC\Contacts\LocalAddressBook($userManager));
    		});
    	}
    
    	/**
    	 * register hooks for the cache
    	 */
    	public static function registerCacheHooks() {
    		if (\OC::$server->getSystemConfig()->getValue('installed', false) && !\OCP\Util::needUpgrade()) { //don't try to do this before we are properly setup
    			\OCP\BackgroundJob::registerJob('OC\Cache\FileGlobalGC');
    
    			// NOTE: This will be replaced to use OCP
    			$userSession = \OC_User::getUserSession();
    			$userSession->listen('postLogin', '\OC\Cache\File', 'loginListener');
    		}
    	}
    
    	/**
    	 * register hooks for the cache
    	 */
    	public static function registerLogRotate() {
    		$systemConfig = \OC::$server->getSystemConfig();
    		if ($systemConfig->getValue('installed', false) && $systemConfig->getValue('log_rotate_size', false) && !\OCP\Util::needUpgrade()) {
    			//don't try to do this before we are properly setup
    			//use custom logfile path if defined, otherwise use default of owncloud.log in data directory
    			\OCP\BackgroundJob::registerJob('OC\Log\Rotate', $systemConfig->getValue('logfile', $systemConfig->getValue('datadirectory', OC::$SERVERROOT . '/data') . '/owncloud.log'));
    		}
    	}
    
    	/**
    	 * register hooks for the filesystem
    	 */
    	public static function registerFilesystemHooks() {
    		// Check for blacklisted files
    		OC_Hook::connect('OC_Filesystem', 'write', 'OC\Files\Filesystem', 'isBlacklisted');
    		OC_Hook::connect('OC_Filesystem', 'rename', 'OC\Files\Filesystem', 'isBlacklisted');
    	}
    
    	/**
    	 * register hooks for previews
    	 */
    	public static function registerPreviewHooks() {
    		OC_Hook::connect('OC_Filesystem', 'post_write', 'OC\Preview', 'post_write');
    		OC_Hook::connect('OC_Filesystem', 'delete', 'OC\Preview', 'prepare_delete_files');
    		OC_Hook::connect('\OCP\Versions', 'preDelete', 'OC\Preview', 'prepare_delete');
    		OC_Hook::connect('\OCP\Trashbin', 'preDelete', 'OC\Preview', 'prepare_delete');
    		OC_Hook::connect('OC_Filesystem', 'post_delete', 'OC\Preview', 'post_delete_files');
    		OC_Hook::connect('\OCP\Versions', 'delete', 'OC\Preview', 'post_delete');
    		OC_Hook::connect('\OCP\Trashbin', 'delete', 'OC\Preview', 'post_delete');
    	}
    
    	/**
    	 * register hooks for sharing
    	 */
    	public static function registerShareHooks() {
    		if (\OC::$server->getSystemConfig()->getValue('installed')) {
    			OC_Hook::connect('OC_User', 'post_deleteUser', 'OC\Share\Hooks', 'post_deleteUser');
    			OC_Hook::connect('OC_User', 'post_addToGroup', 'OC\Share\Hooks', 'post_addToGroup');
    			OC_Hook::connect('OC_User', 'post_removeFromGroup', 'OC\Share\Hooks', 'post_removeFromGroup');
    			OC_Hook::connect('OC_User', 'post_deleteGroup', 'OC\Share\Hooks', 'post_deleteGroup');
    		}
    	}
    
    	protected static function registerAutoloaderCache() {
    		// The class loader takes an optional low-latency cache, which MUST be
    		// namespaced. The instanceid is used for namespacing, but might be
    		// unavailable at this point. Futhermore, it might not be possible to
    		// generate an instanceid via \OC_Util::getInstanceId() because the
    		// config file may not be writable. As such, we only register a class
    		// loader cache if instanceid is available without trying to create one.
    		$instanceId = \OC::$server->getSystemConfig()->getValue('instanceid', null);
    		if ($instanceId) {
    			try {
    				$memcacheFactory = new \OC\Memcache\Factory($instanceId);
    				self::$loader->setMemoryCache($memcacheFactory->createLowLatency('Autoloader'));
    			} catch (\Exception $ex) {
    			}
    		}
    	}
    
    	/**
    	 * Handle the request
    	 */
    	public static function handleRequest() {
    		\OC::$server->getEventLogger()->start('handle_request', 'Handle request');
    		$systemConfig = \OC::$server->getSystemConfig();
    		// load all the classpaths from the enabled apps so they are available
    		// in the routing files of each app
    		OC::loadAppClassPaths();
    
    		// Check if ownCloud is installed or in maintenance (update) mode
    		if (!$systemConfig->getValue('installed', false)) {
    			\OC::$server->getSession()->clear();
    			$controller = new OC\Core\Setup\Controller(\OC::$server->getConfig());
    			$controller->run($_POST);
    			exit();
    		}
    
    		$request = OC_Request::getPathInfo();
    		if (substr($request, -3) !== '.js') { // we need these files during the upgrade
    			self::checkMaintenanceMode();
    			self::checkUpgrade();
    		}
    
    		if (!self::$CLI and (!isset($_GET["logout"]) or ($_GET["logout"] !== 'true'))) {
    			try {
    				if (!$systemConfig->getValue('maintenance', false) && !\OCP\Util::needUpgrade()) {
    					OC_App::loadApps(array('authentication'));
    					OC_App::loadApps(array('filesystem', 'logging'));
    					OC_App::loadApps();
    				}
    				self::checkSingleUserMode();
    				OC_Util::setupFS();
    				OC::$server->getRouter()->match(OC_Request::getRawPathInfo());
    				return;
    			} catch (Symfony\Component\Routing\Exception\ResourceNotFoundException $e) {
    				//header('HTTP/1.0 404 Not Found');
    			} catch (Symfony\Component\Routing\Exception\MethodNotAllowedException $e) {
    				OC_Response::setStatus(405);
    				return;
    			}
    		}
    
    		// Load minimum set of apps
    		if (!self::checkUpgrade(false)) {
    			// For logged-in users: Load everything
    			if(OC_User::isLoggedIn()) {
    				OC_App::loadApps();
    			} else {
    				// For guests: Load only authentication, filesystem and logging
    				OC_App::loadApps(array('authentication'));
    				OC_App::loadApps(array('filesystem', 'logging'));
    			}
    		}
    
    		// Handle redirect URL for logged in users
    		if (isset($_REQUEST['redirect_url']) && OC_User::isLoggedIn()) {
    			$location = OC_Helper::makeURLAbsolute(urldecode($_REQUEST['redirect_url']));
    
    			// Deny the redirect if the URL contains a @
    			// This prevents unvalidated redirects like ?redirect_url=:user@domain.com
    			if (strpos($location, '@') === false) {
    				header('Location: ' . $location);
    				return;
    			}
    		}
    		// Handle WebDAV
    		if ($_SERVER['REQUEST_METHOD'] == 'PROPFIND') {
    			// not allowed any more to prevent people
    			// mounting this root directly.
    			// Users need to mount remote.php/webdav instead.
    			header('HTTP/1.1 405 Method Not Allowed');
    			header('Status: 405 Method Not Allowed');
    			return;
    		}
    
    		// Redirect to index if the logout link is accessed without valid session
    		// this is needed to prevent "Token expired" messages while login if a session is expired
    		// @see https://github.com/owncloud/core/pull/8443#issuecomment-42425583
    		if(isset($_GET['logout']) && !OC_User::isLoggedIn()) {
    			header("Location: " . OC::$WEBROOT.(empty(OC::$WEBROOT) ? '/' : ''));
    			return;
    		}
    
    		// Someone is logged in
    		if (OC_User::isLoggedIn()) {
    			OC_App::loadApps();
    			OC_User::setupBackends();
    			OC_Util::setupFS();
    			if (isset($_GET["logout"]) and ($_GET["logout"])) {
    				OC_JSON::callCheck();
    				if (isset($_COOKIE['oc_token'])) {
    					\OC::$server->getConfig()->deleteUserValue(OC_User::getUser(), 'login_token', $_COOKIE['oc_token']);
    				}
    				OC_User::logout();
    				// redirect to webroot and add slash if webroot is empty
    				header("Location: " . OC::$WEBROOT.(empty(OC::$WEBROOT) ? '/' : ''));
    			} else {
    				// Redirect to default application
    				OC_Util::redirectToDefaultPage();
    			}
    		} else {
    			// Not handled and not logged in
    			self::handleLogin();
    		}
    	}
    
    	protected static function handleAuthHeaders() {
    		//copy http auth headers for apache+php-fcgid work around
    		if (isset($_SERVER['HTTP_XAUTHORIZATION']) && !isset($_SERVER['HTTP_AUTHORIZATION'])) {
    			$_SERVER['HTTP_AUTHORIZATION'] = $_SERVER['HTTP_XAUTHORIZATION'];
    		}
    
    		// Extract PHP_AUTH_USER/PHP_AUTH_PW from other headers if necessary.
    		$vars = array(
    			'HTTP_AUTHORIZATION', // apache+php-cgi work around
    			'REDIRECT_HTTP_AUTHORIZATION', // apache+php-cgi alternative
    		);
    		foreach ($vars as $var) {
    			if (isset($_SERVER[$var]) && preg_match('/Basic\s+(.*)$/i', $_SERVER[$var], $matches)) {
    				list($name, $password) = explode(':', base64_decode($matches[1]), 2);
    				$_SERVER['PHP_AUTH_USER'] = $name;
    				$_SERVER['PHP_AUTH_PW'] = $password;
    				break;
    			}
    		}
    	}
    
    	protected static function handleLogin() {
    		OC_App::loadApps(array('prelogin'));
    		$error = array();
    
    		// auth possible via apache module?
    		if (OC::tryApacheAuth()) {
    			$error[] = 'apacheauthfailed';
    		} // remember was checked after last login
    		elseif (OC::tryRememberLogin()) {
    			$error[] = 'invalidcookie';
    		} // logon via web form
    		elseif (OC::tryFormLogin()) {
    			$error[] = 'invalidpassword';
    		}
    
    		OC_Util::displayLoginPage(array_unique($error));
    	}
    
    	/**
    	 * Remove outdated and therefore invalid tokens for a user
    	 * @param string $user
    	 */
    	protected static function cleanupLoginTokens($user) {
    		$config = \OC::$server->getConfig();
    		$cutoff = time() - $config->getSystemValue('remember_login_cookie_lifetime', 60 * 60 * 24 * 15);
    		$tokens = $config->getUserKeys($user, 'login_token');
    		foreach ($tokens as $token) {
    			$time = $config->getUserValue($user, 'login_token', $token);
    			if ($time < $cutoff) {
    				$config->deleteUserValue($user, 'login_token', $token);
    			}
    		}
    	}
    
    	/**
    	 * Try to login a user via HTTP authentication
    	 * @return bool|void
    	 */
    	protected static function tryApacheAuth() {
    		$return = OC_User::handleApacheAuth();
    
    		// if return is true we are logged in -> redirect to the default page
    		if ($return === true) {
    			$_REQUEST['redirect_url'] = \OC_Request::requestUri();
    			OC_Util::redirectToDefaultPage();
    			exit;
    		}
    
    		// in case $return is null apache based auth is not enabled
    		return is_null($return) ? false : true;
    	}
    
    	/**
    	 * Try to login a user using the remember me cookie.
    	 * @return bool Whether the provided cookie was valid
    	 */
    	protected static function tryRememberLogin() {
    		if (!isset($_COOKIE["oc_remember_login"])
    			|| !isset($_COOKIE["oc_token"])
    			|| !isset($_COOKIE["oc_username"])
    			|| !$_COOKIE["oc_remember_login"]
    			|| !OC_Util::rememberLoginAllowed()
    		) {
    			return false;
    		}
    
    		if (defined("DEBUG") && DEBUG) {
    			OC_Log::write('core', 'Trying to login from cookie', OC_Log::DEBUG);
    		}
    
    		if(OC_User::userExists($_COOKIE['oc_username'])) {
    			self::cleanupLoginTokens($_COOKIE['oc_username']);
    			// verify whether the supplied "remember me" token was valid
    			$granted = OC_User::loginWithCookie(
    				$_COOKIE['oc_username'], $_COOKIE['oc_token']);
    			if($granted === true) {
    				OC_Util::redirectToDefaultPage();
    				// doesn't return
    			}
    			OC_Log::write('core', 'Authentication cookie rejected for user ' .
    				$_COOKIE['oc_username'], OC_Log::WARN);
    			// if you reach this point you have changed your password
    			// or you are an attacker
    			// we can not delete tokens here because users may reach
    			// this point multiple times after a password change
    		}
    
    		OC_User::unsetMagicInCookie();
    		return true;
    	}
    
    	/**
    	 * Tries to login a user using the form based authentication
    	 * @return bool|void
    	 */
    	protected static function tryFormLogin() {
    		if (!isset($_POST["user"]) || !isset($_POST['password'])) {
    			return false;
    		}
    
    		if(!OC_Util::isCallRegistered()) {
    			return false;
    		}
    		OC_App::loadApps();
    
    		//setup extra user backends
    		OC_User::setupBackends();
    
    		if (OC_User::login($_POST["user"], $_POST["password"])) {
    			$userId = OC_User::getUser();
    
    			// setting up the time zone
    			if (isset($_POST['timezone-offset'])) {
    				self::$server->getSession()->set('timezone', $_POST['timezone-offset']);
    				self::$server->getConfig()->setUserValue($userId, 'core', 'timezone', $_POST['timezone']);
    			}
    
    			self::cleanupLoginTokens($userId);
    			if (!empty($_POST["remember_login"])) {
    				if (defined("DEBUG") && DEBUG) {
    					self::$server->getLogger()->debug('Setting remember login to cookie', array('app' => 'core'));
    				}
    				$token = \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate(32);
    				self::$server->getConfig()->setUserValue($userId, 'login_token', $token, time());
    				OC_User::setMagicInCookie($userId, $token);
    			} else {
    				OC_User::unsetMagicInCookie();
    			}
    			OC_Util::redirectToDefaultPage();
    			exit();
    		}
    		return true;
    	}
    }
    
    if (!function_exists('get_temp_dir')) {
    	/**
    	 * Get the temporary dir to store uploaded data
    	 * @return null|string Path to the temporary directory or null
    	 */
    	function get_temp_dir() {
    		if ($temp = ini_get('upload_tmp_dir')) return $temp;
    		if ($temp = getenv('TMP')) return $temp;
    		if ($temp = getenv('TEMP')) return $temp;
    		if ($temp = getenv('TMPDIR')) return $temp;
    		$temp = tempnam(__FILE__, '');
    		if (file_exists($temp)) {
    			unlink($temp);
    			return dirname($temp);
    		}
    		if ($temp = sys_get_temp_dir()) return $temp;
    
    		return null;
    	}
    }
    
    OC::init();