--- /dev/null
+<?php
+
+/**
+ * Class for utility functions
+ *
+ */
+
+class OC_Util {
+ public static $scripts=array();
+ public static $styles=array();
+ public static $headers=array();
+ private static $rootMounted=false;
+ private static $fsSetup=false;
+ public static $coreStyles=array();
+ public static $coreScripts=array();
+
+ /**
+ * @brief Can be set up
+ * @param string $user
+ * @return boolean
+ * @description configure the initial filesystem based on the configuration
+ */
+ public static function setupFS( $user = '' ) {
+ //setting up the filesystem twice can only lead to trouble
+ if(self::$fsSetup) {
+ return false;
+ }
+
+ // If we are not forced to load a specific user we load the one that is logged in
+ if( $user == "" && OC_User::isLoggedIn()) {
+ $user = OC_User::getUser();
+ }
+
+ // load all filesystem apps before, so no setup-hook gets lost
+ if(!isset($RUNTIME_NOAPPS) || !$RUNTIME_NOAPPS) {
+ OC_App::loadApps(array('filesystem'));
+ }
+
+ // the filesystem will finish when $user is not empty,
+ // mark fs setup here to avoid doing the setup from loading
+ // OC_Filesystem
+ if ($user != '') {
+ self::$fsSetup=true;
+ }
+
+ $configDataDirectory = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
+ //first set up the local "root" storage
+ \OC\Files\Filesystem::initMounts();
+ if(!self::$rootMounted) {
+ \OC\Files\Filesystem::mount('\OC\Files\Storage\Local', array('datadir'=>$configDataDirectory), '/');
+ self::$rootMounted = true;
+ }
+
+ //if we aren't logged in, there is no use to set up the filesystem
+ if( $user != "" ) {
+ $quota = self::getUserQuota($user);
+ if ($quota !== \OC\Files\SPACE_UNLIMITED) {
+ \OC\Files\Filesystem::addStorageWrapper(function($mountPoint, $storage) use ($quota, $user) {
+ if ($mountPoint === '/' . $user . '/'){
+ return new \OC\Files\Storage\Wrapper\Quota(array('storage' => $storage, 'quota' => $quota));
+ } else {
+ return $storage;
+ }
+ });
+ }
+ $userDir = '/'.$user.'/files';
+ $userRoot = OC_User::getHome($user);
+ $userDirectory = $userRoot . '/files';
+ if( !is_dir( $userDirectory )) {
+ mkdir( $userDirectory, 0755, true );
+ }
+ //jail the user into his "home" directory
+ \OC\Files\Filesystem::init($user, $userDir);
+
+ $fileOperationProxy = new OC_FileProxy_FileOperations();
+ OC_FileProxy::register($fileOperationProxy);
+
+ OC_Hook::emit('OC_Filesystem', 'setup', array('user' => $user, 'user_dir' => $userDir));
+ }
+ return true;
+ }
+
+ public static function getUserQuota($user){
+ $userQuota = OC_Preferences::getValue($user, 'files', 'quota', 'default');
+ if($userQuota === 'default') {
+ $userQuota = OC_AppConfig::getValue('files', 'default_quota', 'none');
+ }
+ if($userQuota === 'none') {
+ return \OC\Files\SPACE_UNLIMITED;
+ }else{
+ return OC_Helper::computerFileSize($userQuota);
+ }
+ }
+
+ /**
+ * @return void
+ */
+ public static function tearDownFS() {
+ \OC\Files\Filesystem::tearDown();
+ self::$fsSetup=false;
+ self::$rootMounted=false;
+ }
+
+ /**
+ * @brief get the current installed version of ownCloud
+ * @return array
+ */
+ public static function getVersion() {
+ // hint: We only can count up. Reset minor/patchlevel when
+ // updating major/minor version number.
+ return array(5, 80, 07);
+ }
+
+ /**
+ * @brief get the current installed version string of ownCloud
+ * @return string
+ */
+ public static function getVersionString() {
+ return '6.0 pre alpha';
+ }
+
+ /**
+ * @description get the current installed edition of ownCloud. There is the community
+ * edition that just returns an empty string and the enterprise edition
+ * that returns "Enterprise".
+ * @return string
+ */
+ public static function getEditionString() {
+ return '';
+ }
+
+ /**
+ * @brief add a javascript file
+ *
+ * @param string $application
+ * @param filename $file
+ * @return void
+ */
+ public static function addScript( $application, $file = null ) {
+ if ( is_null( $file )) {
+ $file = $application;
+ $application = "";
+ }
+ if ( !empty( $application )) {
+ self::$scripts[] = "$application/js/$file";
+ } else {
+ self::$scripts[] = "js/$file";
+ }
+ }
+
+ /**
+ * @brief add a css file
+ *
+ * @param string $application
+ * @param filename $file
+ * @return void
+ */
+ public static function addStyle( $application, $file = null ) {
+ if ( is_null( $file )) {
+ $file = $application;
+ $application = "";
+ }
+ if ( !empty( $application )) {
+ self::$styles[] = "$application/css/$file";
+ } else {
+ self::$styles[] = "css/$file";
+ }
+ }
+
+ /**
+ * @brief Add a custom element to the header
+ * @param string $tag tag name of the element
+ * @param array $attributes array of attributes for the element
+ * @param string $text the text content for the element
+ * @return void
+ */
+ public static function addHeader( $tag, $attributes, $text='') {
+ self::$headers[] = array(
+ 'tag'=>$tag,
+ 'attributes'=>$attributes,
+ 'text'=>$text
+ );
+ }
+
+ /**
+ * @brief formats a timestamp in the "right" way
+ *
+ * @param int $timestamp
+ * @param bool $dateOnly option to omit time from the result
+ * @return string timestamp
+ * @description adjust to clients timezone if we know it
+ */
+ public static function formatDate( $timestamp, $dateOnly=false) {
+ if(\OC::$session->exists('timezone')) {
+ $systemTimeZone = intval(date('O'));
+ $systemTimeZone = (round($systemTimeZone/100, 0)*60) + ($systemTimeZone%100);
+ $clientTimeZone = \OC::$session->get('timezone')*60;
+ $offset = $clientTimeZone - $systemTimeZone;
+ $timestamp = $timestamp + $offset*60;
+ }
+ $l = OC_L10N::get('lib');
+ return $l->l($dateOnly ? 'date' : 'datetime', $timestamp);
+ }
+
+ /**
+ * @brief check if the current server configuration is suitable for ownCloud
+ * @return array arrays with error messages and hints
+ */
+ public static function checkServer() {
+ // Assume that if checkServer() succeeded before in this session, then all is fine.
+ if(\OC::$session->exists('checkServer_suceeded') && \OC::$session->get('checkServer_suceeded')) {
+ return array();
+ }
+
+ $errors = array();
+
+ $defaults = new \OC_Defaults();
+
+ $webServerRestart = false;
+ //check for database drivers
+ if(!(is_callable('sqlite_open') or class_exists('SQLite3'))
+ and !is_callable('mysql_connect')
+ and !is_callable('pg_connect')
+ and !is_callable('oci_connect')) {
+ $errors[] = array(
+ 'error'=>'No database drivers (sqlite, mysql, or postgresql) installed.',
+ 'hint'=>'' //TODO: sane hint
+ );
+ $webServerRestart = true;
+ }
+
+ //common hint for all file permissions error messages
+ $permissionsHint = 'Permissions can usually be fixed by '
+ .'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html'
+ .'#set-the-directory-permissions" target="_blank">giving the webserver write access to the root directory</a>.';
+
+ // Check if config folder is writable.
+ if(!is_writable(OC::$SERVERROOT."/config/") or !is_readable(OC::$SERVERROOT."/config/")) {
+ $errors[] = array(
+ 'error' => "Can't write into config directory",
+ 'hint' => 'This can usually be fixed by '
+ .'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html'
+ .'#set-the-directory-permissions" target="_blank">giving the webserver write access to the config directory</a>.'
+ );
+ }
+
+ // Check if there is a writable install folder.
+ if(OC_Config::getValue('appstoreenabled', true)) {
+ if( OC_App::getInstallPath() === null
+ || !is_writable(OC_App::getInstallPath())
+ || !is_readable(OC_App::getInstallPath()) ) {
+ $errors[] = array(
+ 'error' => "Can't write into apps directory",
+ 'hint' => 'This can usually be fixed by '
+ .'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html'
+ .'#set-the-directory-permissions" target="_blank">giving the webserver write access to the apps directory</a> '
+ .'or disabling the appstore in the config file.'
+ );
+ }
+ }
+ $CONFIG_DATADIRECTORY = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
+ // Create root dir.
+ if(!is_dir($CONFIG_DATADIRECTORY)) {
+ $success=@mkdir($CONFIG_DATADIRECTORY);
+ if ($success) {
+ $errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
+ } else {
+ $errors[] = array(
+ 'error' => "Can't create data directory (".$CONFIG_DATADIRECTORY.")",
+ 'hint' => 'This can usually be fixed by '
+ .'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html'
+ .'#set-the-directory-permissions" target="_blank">giving the webserver write access to the root directory</a>.'
+ );
+ }
+ } else if(!is_writable($CONFIG_DATADIRECTORY) or !is_readable($CONFIG_DATADIRECTORY)) {
+ $errors[] = array(
+ 'error'=>'Data directory ('.$CONFIG_DATADIRECTORY.') not writable by ownCloud',
+ 'hint'=>$permissionsHint
+ );
+ } else {
+ $errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
+ }
+
+ $moduleHint = "Please ask your server administrator to install the module.";
+ // check if all required php modules are present
+ if(!class_exists('ZipArchive')) {
+ $errors[] = array(
+ 'error'=>'PHP module zip not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!class_exists('DOMDocument')) {
+ $errors[] = array(
+ 'error' => 'PHP module dom not installed.',
+ 'hint' => $moduleHint
+ );
+ $webServerRestart =true;
+ }
+ if(!function_exists('xml_parser_create')) {
+ $errors[] = array(
+ 'error' => 'PHP module libxml not installed.',
+ 'hint' => $moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!function_exists('mb_detect_encoding')) {
+ $errors[] = array(
+ 'error'=>'PHP module mb multibyte not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!function_exists('ctype_digit')) {
+ $errors[] = array(
+ 'error'=>'PHP module ctype is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!function_exists('json_encode')) {
+ $errors[] = array(
+ 'error'=>'PHP module JSON is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!extension_loaded('gd') || !function_exists('gd_info')) {
+ $errors[] = array(
+ 'error'=>'PHP module GD is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!function_exists('gzencode')) {
+ $errors[] = array(
+ 'error'=>'PHP module zlib is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!function_exists('iconv')) {
+ $errors[] = array(
+ 'error'=>'PHP module iconv is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(!function_exists('simplexml_load_string')) {
+ $errors[] = array(
+ 'error'=>'PHP module SimpleXML is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if(floatval(phpversion()) < 5.3) {
+ $errors[] = array(
+ 'error'=>'PHP 5.3 is required.',
+ 'hint'=>'Please ask your server administrator to update PHP to version 5.3 or higher.'
+ .' PHP 5.2 is no longer supported by ownCloud and the PHP community.'
+ );
+ $webServerRestart = true;
+ }
+ if(!defined('PDO::ATTR_DRIVER_NAME')) {
+ $errors[] = array(
+ 'error'=>'PHP PDO module is not installed.',
+ 'hint'=>$moduleHint
+ );
+ $webServerRestart = true;
+ }
+ if (((strtolower(@ini_get('safe_mode')) == 'on')
+ || (strtolower(@ini_get('safe_mode')) == 'yes')
+ || (strtolower(@ini_get('safe_mode')) == 'true')
+ || (ini_get("safe_mode") == 1 ))) {
+ $errors[] = array(
+ 'error'=>'PHP Safe Mode is enabled. ownCloud requires that it is disabled to work properly.',
+ 'hint'=>'PHP Safe Mode is a deprecated and mostly useless setting that should be disabled. '
+ .'Please ask your server administrator to disable it in php.ini or in your webserver config.'
+ );
+ $webServerRestart = true;
+ }
+ if (get_magic_quotes_gpc() == 1 ) {
+ $errors[] = array(
+ 'error'=>'Magic Quotes is enabled. ownCloud requires that it is disabled to work properly.',
+ 'hint'=>'Magic Quotes is a deprecated and mostly useless setting that should be disabled. '
+ .'Please ask your server administrator to disable it in php.ini or in your webserver config.'
+ );
+ $webServerRestart = true;
+ }
+
+ if($webServerRestart) {
+ $errors[] = array(
+ 'error'=>'PHP modules have been installed, but they are still listed as missing?',
+ 'hint'=>'Please ask your server administrator to restart the web server.'
+ );
+ }
+
+ // Cache the result of this function
+ \OC::$session->set('checkServer_suceeded', count($errors) == 0);
+
+ return $errors;
+ }
+
+ /**
+ * @brief check if there are still some encrypted files stored
+ * @return boolean
+ */
+ public static function encryptedFiles() {
+ //check if encryption was enabled in the past
+ $encryptedFiles = false;
+ if (OC_App::isEnabled('files_encryption') === false) {
+ $view = new OC\Files\View('/' . OCP\User::getUser());
+ $keyfilePath = '/files_encryption/keyfiles';
+ if ($view->is_dir($keyfilePath)) {
+ $dircontent = $view->getDirectoryContent($keyfilePath);
+ if (!empty($dircontent)) {
+ $encryptedFiles = true;
+ }
+ }
+ }
+
+ return $encryptedFiles;
+ }
+
+ /**
+ * @brief Check for correct file permissions of data directory
+ * @paran string $dataDirectory
+ * @return array arrays with error messages and hints
+ */
+ public static function checkDataDirectoryPermissions($dataDirectory) {
+ $errors = array();
+ if (self::runningOnWindows()) {
+ //TODO: permissions checks for windows hosts
+ } else {
+ $permissionsModHint = 'Please change the permissions to 0770 so that the directory'
+ .' cannot be listed by other users.';
+ $perms = substr(decoct(@fileperms($dataDirectory)), -3);
+ if (substr($perms, -1) != '0') {
+ OC_Helper::chmodr($dataDirectory, 0770);
+ clearstatcache();
+ $perms = substr(decoct(@fileperms($dataDirectory)), -3);
+ if (substr($perms, 2, 1) != '0') {
+ $errors[] = array(
+ 'error' => 'Data directory ('.$dataDirectory.') is readable for other users',
+ 'hint' => $permissionsModHint
+ );
+ }
+ }
+ }
+ return $errors;
+ }
+
+ /**
+ * @return void
+ */
+ public static function displayLoginPage($errors = array()) {
+ $parameters = array();
+ foreach( $errors as $key => $value ) {
+ $parameters[$value] = true;
+ }
+ if (!empty($_POST['user'])) {
+ $parameters["username"] = $_POST['user'];
+ $parameters['user_autofocus'] = false;
+ } else {
+ $parameters["username"] = '';
+ $parameters['user_autofocus'] = true;
+ }
+ if (isset($_REQUEST['redirect_url'])) {
+ $redirectUrl = $_REQUEST['redirect_url'];
+ $parameters['redirect_url'] = urlencode($redirectUrl);
+ }
+
+ $parameters['alt_login'] = OC_App::getAlternativeLogIns();
++ $parameters['rememberLoginAllowed'] = self::rememberLoginAllowed();
+ OC_Template::printGuestPage("", "login", $parameters);
+ }
+
+
+ /**
+ * @brief Check if the app is enabled, redirects to home if not
+ * @return void
+ */
+ public static function checkAppEnabled($app) {
+ if( !OC_App::isEnabled($app)) {
+ header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
+ exit();
+ }
+ }
+
+ /**
+ * Check if the user is logged in, redirects to home if not. With
+ * redirect URL parameter to the request URI.
+ * @return void
+ */
+ public static function checkLoggedIn() {
+ // Check if we are a user
+ if( !OC_User::isLoggedIn()) {
+ header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php',
+ array('redirectUrl' => OC_Request::requestUri())
+ ));
+ exit();
+ }
+ }
+
+ /**
+ * @brief Check if the user is a admin, redirects to home if not
+ * @return void
+ */
+ public static function checkAdminUser() {
+ if( !OC_User::isAdminUser(OC_User::getUser())) {
+ header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
+ exit();
+ }
+ }
+
++ /**
++ * Check if it is allowed to remember login.
++ *
++ * @note Every app can set 'rememberlogin' to 'false' to disable the remember login feature
++ *
++ * @return bool
++ */
++ public static function rememberLoginAllowed() {
++
++ $apps = OC_App::getEnabledApps();
++
++ foreach ($apps as $app) {
++ $appInfo = OC_App::getAppInfo($app);
++ if (isset($appInfo['rememberlogin']) && $appInfo['rememberlogin'] === 'false') {
++ return false;
++ }
++
++ }
++ return true;
++ }
++
+ /**
+ * @brief Check if the user is a subadmin, redirects to home if not
+ * @return array $groups where the current user is subadmin
+ */
+ public static function checkSubAdminUser() {
+ if(!OC_SubAdmin::isSubAdmin(OC_User::getUser())) {
+ header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
+ exit();
+ }
+ return true;
+ }
+
+ /**
+ * @brief Redirect to the user default page
+ * @return void
+ */
+ public static function redirectToDefaultPage() {
+ if(isset($_REQUEST['redirect_url'])) {
+ $location = OC_Helper::makeURLAbsolute(urldecode($_REQUEST['redirect_url']));
+ }
+ else if (isset(OC::$REQUESTEDAPP) && !empty(OC::$REQUESTEDAPP)) {
+ $location = OC_Helper::linkToAbsolute( OC::$REQUESTEDAPP, 'index.php' );
+ } else {
+ $defaultPage = OC_Appconfig::getValue('core', 'defaultpage');
+ if ($defaultPage) {
+ $location = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/'.$defaultPage);
+ } else {
+ $location = OC_Helper::linkToAbsolute( 'files', 'index.php' );
+ }
+ }
+ OC_Log::write('core', 'redirectToDefaultPage: '.$location, OC_Log::DEBUG);
+ header( 'Location: '.$location );
+ exit();
+ }
+
+ /**
+ * @brief get an id unique for this instance
+ * @return string
+ */
+ public static function getInstanceId() {
+ $id = OC_Config::getValue('instanceid', null);
+ if(is_null($id)) {
+ // We need to guarantee at least one letter in instanceid so it can be used as the session_name
+ $id = 'oc' . self::generateRandomBytes(10);
+ OC_Config::setValue('instanceid', $id);
+ }
+ return $id;
+ }
+
+ /**
+ * @brief Static lifespan (in seconds) when a request token expires.
+ * @see OC_Util::callRegister()
+ * @see OC_Util::isCallRegistered()
+ * @description
+ * Also required for the client side to compute the point in time when to
+ * request a fresh token. The client will do so when nearly 97% of the
+ * time span coded here has expired.
+ */
+ public static $callLifespan = 3600; // 3600 secs = 1 hour
+
+ /**
+ * @brief Register an get/post call. Important to prevent CSRF attacks.
+ * @todo Write howto: CSRF protection guide
+ * @return $token Generated token.
+ * @description
+ * Creates a 'request token' (random) and stores it inside the session.
+ * Ever subsequent (ajax) request must use such a valid token to succeed,
+ * otherwise the request will be denied as a protection against CSRF.
+ * The tokens expire after a fixed lifespan.
+ * @see OC_Util::$callLifespan
+ * @see OC_Util::isCallRegistered()
+ */
+ public static function callRegister() {
+ // Check if a token exists
+ if(!\OC::$session->exists('requesttoken')) {
+ // No valid token found, generate a new one.
+ $requestToken = self::generateRandomBytes(20);
+ \OC::$session->set('requesttoken', $requestToken);
+ } else {
+ // Valid token already exists, send it
+ $requestToken = \OC::$session->get('requesttoken');
+ }
+ return($requestToken);
+ }
+
+ /**
+ * @brief Check an ajax get/post call if the request token is valid.
+ * @return boolean False if request token is not set or is invalid.
+ * @see OC_Util::$callLifespan
+ * @see OC_Util::callRegister()
+ */
+ public static function isCallRegistered() {
+ if(!\OC::$session->exists('requesttoken')) {
+ return false;
+ }
+
+ if(isset($_GET['requesttoken'])) {
+ $token = $_GET['requesttoken'];
+ } elseif(isset($_POST['requesttoken'])) {
+ $token = $_POST['requesttoken'];
+ } elseif(isset($_SERVER['HTTP_REQUESTTOKEN'])) {
+ $token = $_SERVER['HTTP_REQUESTTOKEN'];
+ } else {
+ //no token found.
+ return false;
+ }
+
+ // Check if the token is valid
+ if($token !== \OC::$session->get('requesttoken')) {
+ // Not valid
+ return false;
+ } else {
+ // Valid token
+ return true;
+ }
+ }
+
+ /**
+ * @brief Check an ajax get/post call if the request token is valid. exit if not.
+ * @todo Write howto
+ * @return void
+ */
+ public static function callCheck() {
+ if(!OC_Util::isCallRegistered()) {
+ exit();
+ }
+ }
+
+ /**
+ * @brief Public function to sanitize HTML
+ *
+ * This function is used to sanitize HTML and should be applied on any
+ * string or array of strings before displaying it on a web page.
+ *
+ * @param string|array of strings
+ * @return array with sanitized strings or a single sanitized string, depends on the input parameter.
+ */
+ public static function sanitizeHTML( &$value ) {
+ if (is_array($value)) {
+ array_walk_recursive($value, 'OC_Util::sanitizeHTML');
+ } else {
+ //Specify encoding for PHP<5.4
+ $value = htmlentities((string)$value, ENT_QUOTES, 'UTF-8');
+ }
+ return $value;
+ }
+
+ /**
+ * @brief Public function to encode url parameters
+ *
+ * This function is used to encode path to file before output.
+ * Encoding is done according to RFC 3986 with one exception:
+ * Character '/' is preserved as is.
+ *
+ * @param string $component part of URI to encode
+ * @return string
+ */
+ public static function encodePath($component) {
+ $encoded = rawurlencode($component);
+ $encoded = str_replace('%2F', '/', $encoded);
+ return $encoded;
+ }
+
+ /**
+ * @brief Check if the htaccess file is working
+ * @return bool
+ * @description Check if the htaccess file is working by creating a test
+ * file in the data directory and trying to access via http
+ */
+ public static function isHtAccessWorking() {
+ // testdata
+ $fileName = '/htaccesstest.txt';
+ $testContent = 'testcontent';
+
+ // creating a test file
+ $testFile = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ).'/'.$fileName;
+
+ if(file_exists($testFile)) {// already running this test, possible recursive call
+ return false;
+ }
+
+ $fp = @fopen($testFile, 'w');
+ @fwrite($fp, $testContent);
+ @fclose($fp);
+
+ // accessing the file via http
+ $url = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/data'.$fileName);
+ $fp = @fopen($url, 'r');
+ $content=@fread($fp, 2048);
+ @fclose($fp);
+
+ // cleanup
+ @unlink($testFile);
+
+ // does it work ?
+ if($content==$testContent) {
+ return false;
+ } else {
+ return true;
+ }
+ }
+
+ /**
+ * @brief test if webDAV is working properly
+ * @return bool
+ * @description
+ * The basic assumption is that if the server returns 401/Not Authenticated for an unauthenticated PROPFIND
+ * the web server it self is setup properly.
+ *
+ * Why not an authenticated PROPFIND and other verbs?
+ * - We don't have the password available
+ * - We have no idea about other auth methods implemented (e.g. OAuth with Bearer header)
+ *
+ */
+ public static function isWebDAVWorking() {
+ if (!function_exists('curl_init')) {
+ return true;
+ }
+ $settings = array(
+ 'baseUri' => OC_Helper::linkToRemote('webdav'),
+ );
+
+ $client = new \Sabre_DAV_Client($settings);
+
+ // for this self test we don't care if the ssl certificate is self signed and the peer cannot be verified.
+ $client->setVerifyPeer(false);
+
+ $return = true;
+ try {
+ // test PROPFIND
+ $client->propfind('', array('{DAV:}resourcetype'));
+ } catch (\Sabre_DAV_Exception_NotAuthenticated $e) {
+ $return = true;
+ } catch (\Exception $e) {
+ OC_Log::write('core', 'isWebDAVWorking: NO - Reason: '.$e->getMessage(). ' ('.get_class($e).')', OC_Log::WARN);
+ $return = false;
+ }
+
+ return $return;
+ }
+
+ /**
+ * Check if the setlocal call does not work. This can happen if the right
+ * local packages are not available on the server.
+ * @return bool
+ */
+ public static function isSetLocaleWorking() {
+ // setlocale test is pointless on Windows
+ if (OC_Util::runningOnWindows() ) {
+ return true;
+ }
+
+ $result = setlocale(LC_ALL, 'en_US.UTF-8', 'en_US.UTF8');
+ if($result == false) {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * @brief Check if the PHP module fileinfo is loaded.
+ * @return bool
+ */
+ public static function fileInfoLoaded() {
+ return function_exists('finfo_open');
+ }
+
+ /**
+ * @brief Check if the ownCloud server can connect to the internet
+ * @return bool
+ */
+ public static function isInternetConnectionWorking() {
+ // in case there is no internet connection on purpose return false
+ if (self::isInternetConnectionEnabled() === false) {
+ return false;
+ }
+
+ // try to connect to owncloud.org to see if http connections to the internet are possible.
+ $connected = @fsockopen("www.owncloud.org", 80);
+ if ($connected) {
+ fclose($connected);
+ return true;
+ } else {
+ // second try in case one server is down
+ $connected = @fsockopen("apps.owncloud.com", 80);
+ if ($connected) {
+ fclose($connected);
+ return true;
+ } else {
+ return false;
+ }
+ }
+ }
+
+ /**
+ * @brief Check if the connection to the internet is disabled on purpose
+ * @return bool
+ */
+ public static function isInternetConnectionEnabled(){
+ return \OC_Config::getValue("has_internet_connection", true);
+ }
+
+ /**
+ * @brief clear all levels of output buffering
+ * @return void
+ */
+ public static function obEnd(){
+ while (ob_get_level()) {
+ ob_end_clean();
+ }
+ }
+
+
+ /**
+ * @brief Generates a cryptographic secure pseudo-random string
+ * @param Int $length of the random string
+ * @return String
+ * Please also update secureRNGAvailable if you change something here
+ */
+ public static function generateRandomBytes($length = 30) {
+ // Try to use openssl_random_pseudo_bytes
+ if (function_exists('openssl_random_pseudo_bytes')) {
+ $pseudoByte = bin2hex(openssl_random_pseudo_bytes($length, $strong));
+ if($strong == true) {
+ return substr($pseudoByte, 0, $length); // Truncate it to match the length
+ }
+ }
+
+ // Try to use /dev/urandom
+ if (!self::runningOnWindows()) {
+ $fp = @file_get_contents('/dev/urandom', false, null, 0, $length);
+ if ($fp !== false) {
+ $string = substr(bin2hex($fp), 0, $length);
+ return $string;
+ }
+ }
+
+ // Fallback to mt_rand()
+ $characters = '0123456789';
+ $characters .= 'abcdefghijklmnopqrstuvwxyz';
+ $charactersLength = strlen($characters)-1;
+ $pseudoByte = "";
+
+ // Select some random characters
+ for ($i = 0; $i < $length; $i++) {
+ $pseudoByte .= $characters[mt_rand(0, $charactersLength)];
+ }
+ return $pseudoByte;
+ }
+
+ /**
+ * @brief Checks if a secure random number generator is available
+ * @return bool
+ */
+ public static function secureRNGAvailable() {
+ // Check openssl_random_pseudo_bytes
+ if(function_exists('openssl_random_pseudo_bytes')) {
+ openssl_random_pseudo_bytes(1, $strong);
+ if($strong == true) {
+ return true;
+ }
+ }
+
+ // Check /dev/urandom
+ if (!self::runningOnWindows()) {
+ $fp = @file_get_contents('/dev/urandom', false, null, 0, 1);
+ if ($fp !== false) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * @Brief Get file content via curl.
+ * @param string $url Url to get content
+ * @return string of the response or false on error
+ * This function get the content of a page via curl, if curl is enabled.
+ * If not, file_get_element is used.
+ */
+ public static function getUrlContent($url){
+ if (function_exists('curl_init')) {
+ $curl = curl_init();
+
+ curl_setopt($curl, CURLOPT_HEADER, 0);
+ curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
+ curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
+ curl_setopt($curl, CURLOPT_URL, $url);
+ curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
+ curl_setopt($curl, CURLOPT_MAXREDIRS, 10);
+
+ curl_setopt($curl, CURLOPT_USERAGENT, "ownCloud Server Crawler");
+ if(OC_Config::getValue('proxy', '') != '') {
+ curl_setopt($curl, CURLOPT_PROXY, OC_Config::getValue('proxy'));
+ }
+ if(OC_Config::getValue('proxyuserpwd', '') != '') {
+ curl_setopt($curl, CURLOPT_PROXYUSERPWD, OC_Config::getValue('proxyuserpwd'));
+ }
+ $data = curl_exec($curl);
+ curl_close($curl);
+
+ } else {
+ $contextArray = null;
+
+ if(OC_Config::getValue('proxy', '') != '') {
+ $contextArray = array(
+ 'http' => array(
+ 'timeout' => 10,
+ 'proxy' => OC_Config::getValue('proxy')
+ )
+ );
+ } else {
+ $contextArray = array(
+ 'http' => array(
+ 'timeout' => 10
+ )
+ );
+ }
+
+ $ctx = stream_context_create(
+ $contextArray
+ );
+ $data = @file_get_contents($url, 0, $ctx);
+
+ }
+ return $data;
+ }
+
+ /**
+ * @return bool - well are we running on windows or not
+ */
+ public static function runningOnWindows() {
+ return (substr(PHP_OS, 0, 3) === "WIN");
+ }
+
+ /**
+ * Handles the case that there may not be a theme, then check if a "default"
+ * theme exists and take that one
+ * @return string the theme
+ */
+ public static function getTheme() {
+ $theme = OC_Config::getValue("theme", '');
+
+ if($theme === '') {
+ if(is_dir(OC::$SERVERROOT . '/themes/default')) {
+ $theme = 'default';
+ }
+ }
+
+ return $theme;
+ }
+
+ /**
+ * @brief Clear the opcode cache if one exists
+ * This is necessary for writing to the config file
+ * in case the opcode cache does not re-validate files
+ * @return void
+ */
+ public static function clearOpcodeCache() {
+ // APC
+ if (function_exists('apc_clear_cache')) {
+ apc_clear_cache();
+ }
+ // Zend Opcache
+ if (function_exists('accelerator_reset')) {
+ accelerator_reset();
+ }
+ // XCache
+ if (function_exists('xcache_clear_cache')) {
+ xcache_clear_cache(XC_TYPE_VAR, 0);
+ }
+ // Opcache (PHP >= 5.5)
+ if (function_exists('opcache_reset')) {
+ opcache_reset();
+ }
+ }
+
+ /**
+ * Normalize a unicode string
+ * @param string $value a not normalized string
+ * @return bool|string
+ */
+ public static function normalizeUnicode($value) {
+ if(class_exists('Patchwork\PHP\Shim\Normalizer')) {
+ $normalizedValue = \Patchwork\PHP\Shim\Normalizer::normalize($value);
+ if($normalizedValue === false) {
+ \OC_Log::write( 'core', 'normalizing failed for "' . $value . '"', \OC_Log::WARN);
+ } else {
+ $value = $normalizedValue;
+ }
+ }
+
+ return $value;
+ }
+
+ /**
+ * @return string
+ */
+ public static function basename($file) {
+ $file = rtrim($file, '/');
+ $t = explode('/', $file);
+ return array_pop($t);
+ }
+}
projects / nextcloud-server.git / commitdiff