]> git.mxchange.org Git - friendica.git/blobdiff - src/App.php
Logger Levels
[friendica.git] / src / App.php
index 7622a1a0ce3aacb5e2795fbdd6b9c1e7b572e78e..92eb9409cafe1af40b8bcbbcbe0204479aafe273 100644 (file)
@@ -5,15 +5,13 @@
 namespace Friendica;
 
 use Detection\MobileDetect;
+use DOMDocument;
+use DOMXPath;
 use Exception;
-use Friendica\Core\Config;
-use Friendica\Core\L10n;
-use Friendica\Core\PConfig;
-use Friendica\Core\System;
 use Friendica\Database\DBA;
+use Friendica\Network\HTTPException\InternalServerErrorException;
 
 require_once 'boot.php';
-require_once 'include/dba.php';
 require_once 'include/text.php';
 
 /**
@@ -31,28 +29,11 @@ require_once 'include/text.php';
  */
 class App
 {
-       const MODE_LOCALCONFIGPRESENT = 1;
-       const MODE_DBAVAILABLE = 2;
-       const MODE_DBCONFIGAVAILABLE = 4;
-       const MODE_MAINTENANCEDISABLED = 8;
-
-       /**
-        * @deprecated since version 2008.08 Use App->isInstallMode() instead to check for install mode.
-        */
-       const MODE_INSTALL = 0;
-
-       /**
-        * @deprecated since version 2008.08 Use the precise mode constant to check for a specific capability instead.
-        */
-       const MODE_NORMAL = App::MODE_LOCALCONFIGPRESENT | App::MODE_DBAVAILABLE | App::MODE_DBCONFIGAVAILABLE | App::MODE_MAINTENANCEDISABLED;
-
        public $module_loaded = false;
        public $module_class = null;
        public $query_string = '';
        public $config = [];
        public $page = [];
-       public $pager = [];
-       public $page_offset;
        public $profile;
        public $profile_uid;
        public $user;
@@ -67,25 +48,14 @@ class App
        public $argv;
        public $argc;
        public $module;
-       public $mode = App::MODE_INSTALL;
-       public $strings;
-       public $basepath;
-       public $urlpath;
-       public $hooks = [];
        public $timezone;
        public $interactive = true;
-       public $addons;
-       public $addons_admin = [];
-       public $apps = [];
        public $identities;
        public $is_mobile = false;
        public $is_tablet = false;
-       public $is_friendica_app;
        public $performance = [];
        public $callstack = [];
        public $theme_info = [];
-       public $backend = true;
-       public $nav_sel;
        public $category;
        // Allow themes to control internal parameters
        // by changing App values in theme.php
@@ -99,18 +69,53 @@ class App
        public $stylesheets = [];
        public $footerScripts = [];
 
+       /**
+        * @var App\Mode The Mode of the Application
+        */
+       private $mode;
+
+       /**
+        * @var string The App base path
+        */
+       private $basePath;
+
+       /**
+        * @var string The App URL path
+        */
+       private $urlPath;
+
+       /**
+        * @var bool true, if the call is from the Friendica APP, otherwise false
+        */
+       private $isFriendicaApp;
+
+       /**
+        * @var bool true, if the call is from an backend node (f.e. worker)
+        */
+       private $isBackend;
+
+       /**
+        * @var string The name of the current theme
+        */
+       private $currentTheme;
+
+       /**
+        * @var bool check if request was an AJAX (xmlhttprequest) request
+        */
+       private $isAjax;
+
        /**
         * Register a stylesheet file path to be included in the <head> tag of every page.
         * Inclusion is done in App->initHead().
         * The path can be absolute or relative to the Friendica installation base folder.
         *
-        * @see App->initHead()
+        * @see initHead()
         *
         * @param string $path
         */
        public function registerStylesheet($path)
        {
-               $url = str_replace($this->get_basepath() . DIRECTORY_SEPARATOR, '', $path);
+               $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 
                $this->stylesheets[] = trim($url, '/');
        }
@@ -120,13 +125,13 @@ class App
         * Inclusion is done in App->initFooter().
         * The path can be absolute or relative to the Friendica installation base folder.
         *
-        * @see App->initFooter()
+        * @see initFooter()
         *
         * @param string $path
         */
        public function registerFooterScript($path)
        {
-               $url = str_replace($this->get_basepath() . DIRECTORY_SEPARATOR, '', $path);
+               $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 
                $this->footerScripts[] = trim($url, '/');
        }
@@ -167,26 +172,26 @@ class App
        ];
        private $scheme;
        private $hostname;
-       private $curl_code;
-       private $curl_content_type;
-       private $curl_headers;
 
        /**
         * @brief App constructor.
         *
-        * @param string $basepath Path to the app base folder
+        * @param string $basePath  Path to the app base folder
+        * @param bool   $isBackend Whether it is used for backend or frontend (Default true=backend)
         *
         * @throws Exception if the Basepath is not usable
         */
-       public function __construct($basepath)
+       public function __construct($basePath, $isBackend = true)
        {
-               if (!static::directory_usable($basepath, false)) {
-                       throw new Exception('Basepath ' . $basepath . ' isn\'t usable.');
+               if (!static::isDirectoryUsable($basePath, false)) {
+                       throw new Exception('Basepath ' . $basePath . ' isn\'t usable.');
                }
 
                BaseObject::setApp($this);
 
-               $this->basepath = rtrim($basepath, DIRECTORY_SEPARATOR);
+               $this->basePath = rtrim($basePath, DIRECTORY_SEPARATOR);
+               $this->checkBackend($isBackend);
+               $this->checkFriendicaApp();
 
                $this->performance['start'] = microtime(true);
                $this->performance['database'] = 0;
@@ -209,6 +214,8 @@ class App
                $this->callstack['rendering'] = [];
                $this->callstack['parser'] = [];
 
+               $this->mode = new App\Mode($basePath);
+
                $this->reload();
 
                set_time_limit(0);
@@ -218,33 +225,33 @@ class App
 
                $this->scheme = 'http';
 
-               if ((x($_SERVER, 'HTTPS') && $_SERVER['HTTPS']) ||
-                       (x($_SERVER, 'HTTP_FORWARDED') && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED'])) ||
-                       (x($_SERVER, 'HTTP_X_FORWARDED_PROTO') && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') ||
-                       (x($_SERVER, 'HTTP_X_FORWARDED_SSL') && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on') ||
-                       (x($_SERVER, 'FRONT_END_HTTPS') && $_SERVER['FRONT_END_HTTPS'] == 'on') ||
-                       (x($_SERVER, 'SERVER_PORT') && (intval($_SERVER['SERVER_PORT']) == 443)) // XXX: reasonable assumption, but isn't this hardcoding too much?
+               if (!empty($_SERVER['HTTPS']) ||
+                       !empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
+                       !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
+                       !empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
+                       !empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
+                       !empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
                ) {
                        $this->scheme = 'https';
                }
 
-               if (x($_SERVER, 'SERVER_NAME')) {
+               if (!empty($_SERVER['SERVER_NAME'])) {
                        $this->hostname = $_SERVER['SERVER_NAME'];
 
-                       if (x($_SERVER, 'SERVER_PORT') && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
+                       if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
                                $this->hostname .= ':' . $_SERVER['SERVER_PORT'];
                        }
                }
 
                set_include_path(
                        get_include_path() . PATH_SEPARATOR
-                       . $this->basepath . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
-                       . $this->basepath . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
-                       . $this->basepath);
+                       . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
+                       . $this->getBasePath(). DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
+                       . $this->getBasePath());
 
-               if ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 9) === 'pagename=') {
+               if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
                        $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
-               } elseif ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 2) === 'q=') {
+               } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
                        $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
                }
 
@@ -294,26 +301,31 @@ class App
                        $this->module = 'home';
                }
 
-               // See if there is any page number information, and initialise pagination
-               $this->pager['page'] = ((x($_GET, 'page') && intval($_GET['page']) > 0) ? intval($_GET['page']) : 1);
-               $this->pager['itemspage'] = 50;
-               $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];
-
-               if ($this->pager['start'] < 0) {
-                       $this->pager['start'] = 0;
-               }
-               $this->pager['total'] = 0;
-
                // Detect mobile devices
                $mobile_detect = new MobileDetect();
                $this->is_mobile = $mobile_detect->isMobile();
                $this->is_tablet = $mobile_detect->isTablet();
 
-               // Friendica-Client
-               $this->is_friendica_app = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
+               $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 
                // Register template engines
-               $this->register_template_engine('Friendica\Render\FriendicaSmartyEngine');
+               $this->registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
+       }
+
+       /**
+        * Returns the Mode of the Application
+        *
+        * @return App\Mode The Application Mode
+        *
+        * @throws InternalServerErrorException when the mode isn't created
+        */
+       public function getMode()
+       {
+               if (empty($this->mode)) {
+                       throw new InternalServerErrorException('Mode of the Application is not defined');
+               }
+
+               return $this->mode;
        }
 
        /**
@@ -326,34 +338,23 @@ class App
 
                $this->loadDatabase();
 
-               $this->determineMode();
+               $this->getMode()->determine($this->getBasePath());
 
-               $this->determineUrlPath();
+               $this->determineURLPath();
 
-               Config::load();
+               Core\Config::load();
 
-               if ($this->mode & self::MODE_DBAVAILABLE) {
-                       Core\Addon::loadHooks();
+               if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
+                       Core\Hook::loadHooks();
 
                        $this->loadAddonConfig();
                }
 
                $this->loadDefaultTimezone();
 
-               $this->page = [
-                       'aside' => '',
-                       'bottom' => '',
-                       'content' => '',
-                       'footer' => '',
-                       'htmlhead' => '',
-                       'nav' => '',
-                       'page_title' => '',
-                       'right_aside' => '',
-                       'template' => '',
-                       'title' => ''
-               ];
+               Core\L10n::init();
 
-               $this->process_id = System::processID('log');
+               $this->process_id = Core\System::processID('log');
        }
 
        /**
@@ -364,20 +365,20 @@ class App
         */
        private function loadConfigFiles()
        {
-               $this->loadConfigFile($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'config.ini.php');
-               $this->loadConfigFile($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'settings.ini.php');
+               $this->loadConfigFile($this->getBasePath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'config.ini.php');
+               $this->loadConfigFile($this->getBasePath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'settings.ini.php');
 
                // Legacy .htconfig.php support
-               if (file_exists($this->basepath . DIRECTORY_SEPARATOR . '.htpreconfig.php')) {
+               if (file_exists($this->getBasePath() . DIRECTORY_SEPARATOR . '.htpreconfig.php')) {
                        $a = $this;
-                       include $this->basepath . DIRECTORY_SEPARATOR . '.htpreconfig.php';
+                       include $this->getBasePath() . DIRECTORY_SEPARATOR . '.htpreconfig.php';
                }
 
                // Legacy .htconfig.php support
-               if (file_exists($this->basepath . DIRECTORY_SEPARATOR . '.htconfig.php')) {
+               if (file_exists($this->getBasePath() . DIRECTORY_SEPARATOR . '.htconfig.php')) {
                        $a = $this;
 
-                       include $this->basepath . DIRECTORY_SEPARATOR . '.htconfig.php';
+                       include $this->getBasePath() . DIRECTORY_SEPARATOR . '.htconfig.php';
 
                        $this->setConfigValue('database', 'hostname', $db_host);
                        $this->setConfigValue('database', 'username', $db_user);
@@ -405,8 +406,8 @@ class App
                        }
                }
 
-               if (file_exists($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'local.ini.php')) {
-                       $this->loadConfigFile($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'local.ini.php', true);
+               if (file_exists($this->getBasePath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'local.ini.php')) {
+                       $this->loadConfigFile($this->getBasePath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'local.ini.php', true);
                }
        }
 
@@ -424,7 +425,7 @@ class App
         * INI;
         * // Keep this line
         *
-        * @param type $filepath
+        * @param string $filepath
         * @param bool $overwrite Force value overwrite if the config key already exists
         * @throws Exception
         */
@@ -465,8 +466,8 @@ class App
                Core\Addon::callHooks('load_config');
 
                // Load the local addon config file to overwritten default addon config values
-               if (file_exists($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'addon.ini.php')) {
-                       $this->loadConfigFile($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'addon.ini.php', true);
+               if (file_exists($this->getBasePath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'addon.ini.php')) {
+                       $this->loadConfigFile($this->getBasePath() . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'addon.ini.php', true);
                }
        }
 
@@ -494,69 +495,40 @@ class App
        /**
         * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
         */
-       private function determineUrlPath()
+       private function determineURLPath()
        {
-               $this->urlpath = $this->getConfigValue('system', 'urlpath');
+               /* Relative script path to the web server root
+                * Not all of those $_SERVER properties can be present, so we do by inverse priority order
+                */
+               $relative_script_path = '';
+               $relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
+               $relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
+               $relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
+               $relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
+               $relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
+
+               $this->urlPath = $this->getConfigValue('system', 'urlpath');
 
-               /* SCRIPT_URL gives /path/to/friendica/module/parameter
+               /* $relative_script_path gives /relative/path/to/friendica/module/parameter
                 * QUERY_STRING gives pagename=module/parameter
                 *
-                * To get /path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
+                * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
                 */
-               if (!empty($_SERVER['SCRIPT_URL'])) {
+               if (!empty($relative_script_path)) {
                        // Module
                        if (!empty($_SERVER['QUERY_STRING'])) {
-                               $path = trim(dirname($_SERVER['SCRIPT_URL'], substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
+                               $path = trim(dirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
                        } else {
                                // Root page
-                               $path = trim($_SERVER['SCRIPT_URL'], '/');
+                               $path = trim($relative_script_path, '/');
                        }
 
-                       if ($path && $path != $this->urlpath) {
-                               $this->urlpath = $path;
+                       if ($path && $path != $this->urlPath) {
+                               $this->urlPath = $path;
                        }
                }
        }
 
-       /**
-        * Sets the App mode
-        *
-        * - App::MODE_INSTALL    : Either the database connection can't be established or the config table doesn't exist
-        * - App::MODE_MAINTENANCE: The maintenance mode has been set
-        * - App::MODE_NORMAL     : Normal run with all features enabled
-        *
-        * @return type
-        */
-       private function determineMode()
-       {
-               $this->mode = 0;
-
-               if (!file_exists($this->basepath . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'local.ini.php')
-                       && !file_exists($this->basepath . DIRECTORY_SEPARATOR . '.htconfig.php')) {
-                       return;
-               }
-
-               $this->mode |= App::MODE_LOCALCONFIGPRESENT;
-
-               if (!DBA::connected()) {
-                       return;
-               }
-
-               $this->mode |= App::MODE_DBAVAILABLE;
-
-               if (DBA::fetchFirst("SHOW TABLES LIKE 'config'") === false) {
-                       return;
-               }
-
-               $this->mode |= App::MODE_DBCONFIGAVAILABLE;
-
-               if (Config::get('system', 'maintenance')) {
-                       return;
-               }
-
-               $this->mode |= App::MODE_MAINTENANCEDISABLED;
-       }
-
        public function loadDatabase()
        {
                if (DBA::connected()) {
@@ -590,20 +562,14 @@ class App
 
                $stamp1 = microtime(true);
 
-               DBA::connect($db_host, $db_user, $db_pass, $db_data, $charset);
+               if (DBA::connect($db_host, $db_user, $db_pass, $db_data, $charset)) {
+                       // Loads DB_UPDATE_VERSION constant
+                       Database\DBStructure::definition(false);
+               }
+
                unset($db_host, $db_user, $db_pass, $db_data, $charset);
 
-               $this->save_timestamp($stamp1, 'network');
-       }
-
-       /**
-        * Install mode is when the local config file is missing or the DB schema hasn't been installed yet.
-        *
-        * @return bool
-        */
-       public function isInstallMode()
-       {
-               return !($this->mode & App::MODE_LOCALCONFIGPRESENT) || !($this->mode & App::MODE_DBCONFIGAVAILABLE);
+               $this->saveTimestamp($stamp1, 'network');
        }
 
        /**
@@ -614,23 +580,23 @@ class App
         *
         * @return string
         */
-       public function get_basepath()
+       public function getBasePath()
        {
-               $basepath = $this->basepath;
+               $basepath = $this->basePath;
 
                if (!$basepath) {
-                       $basepath = Config::get('system', 'basepath');
+                       $basepath = Core\Config::get('system', 'basepath');
                }
 
-               if (!$basepath && x($_SERVER, 'DOCUMENT_ROOT')) {
+               if (!$basepath && !empty($_SERVER['DOCUMENT_ROOT'])) {
                        $basepath = $_SERVER['DOCUMENT_ROOT'];
                }
 
-               if (!$basepath && x($_SERVER, 'PWD')) {
+               if (!$basepath && !empty($_SERVER['PWD'])) {
                        $basepath = $_SERVER['PWD'];
                }
 
-               return self::realpath($basepath);
+               return self::getRealPath($basepath);
        }
 
        /**
@@ -643,7 +609,7 @@ class App
         * @param string $path The path that is about to be normalized
         * @return string normalized path - when possible
         */
-       public static function realpath($path)
+       public static function getRealPath($path)
        {
                $normalized = realpath($path);
 
@@ -654,7 +620,7 @@ class App
                }
        }
 
-       public function get_scheme()
+       public function getScheme()
        {
                return $this->scheme;
        }
@@ -673,18 +639,18 @@ class App
         * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
         * @return string Friendica server base URL
         */
-       public function get_baseurl($ssl = false)
+       public function getBaseURL($ssl = false)
        {
                $scheme = $this->scheme;
 
-               if (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
+               if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
                        $scheme = 'https';
                }
 
                //      Basically, we have $ssl = true on any links which can only be seen by a logged in user
                //      (and also the login link). Anything seen by an outsider will have it turned off.
 
-               if (Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
+               if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
                        if ($ssl) {
                                $scheme = 'https';
                        } else {
@@ -692,11 +658,11 @@ class App
                        }
                }
 
-               if (Config::get('config', 'hostname') != '') {
-                       $this->hostname = Config::get('config', 'hostname');
+               if (Core\Config::get('config', 'hostname') != '') {
+                       $this->hostname = Core\Config::get('config', 'hostname');
                }
 
-               return $scheme . '://' . $this->hostname . (!empty($this->urlpath) ? '/' . $this->urlpath : '' );
+               return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
        }
 
        /**
@@ -706,12 +672,12 @@ class App
         *
         * @param string $url
         */
-       public function set_baseurl($url)
+       public function setBaseURL($url)
        {
                $parsed = @parse_url($url);
                $hostname = '';
 
-               if (x($parsed)) {
+               if (!empty($parsed)) {
                        if (!empty($parsed['scheme'])) {
                                $this->scheme = $parsed['scheme'];
                        }
@@ -720,19 +686,19 @@ class App
                                $hostname = $parsed['host'];
                        }
 
-                       if (x($parsed, 'port')) {
+                       if (!empty($parsed['port'])) {
                                $hostname .= ':' . $parsed['port'];
                        }
-                       if (x($parsed, 'path')) {
-                               $this->urlpath = trim($parsed['path'], '\\/');
+                       if (!empty($parsed['path'])) {
+                               $this->urlPath = trim($parsed['path'], '\\/');
                        }
 
-                       if (file_exists($this->basepath . DIRECTORY_SEPARATOR . '.htpreconfig.php')) {
-                               include $this->basepath . DIRECTORY_SEPARATOR . '.htpreconfig.php';
+                       if (file_exists($this->getBasePath() . DIRECTORY_SEPARATOR . '.htpreconfig.php')) {
+                               include $this->getBasePath() . DIRECTORY_SEPARATOR . '.htpreconfig.php';
                        }
 
-                       if (Config::get('config', 'hostname') != '') {
-                               $this->hostname = Config::get('config', 'hostname');
+                       if (Core\Config::get('config', 'hostname') != '') {
+                               $this->hostname = Core\Config::get('config', 'hostname');
                        }
 
                        if (!isset($this->hostname) || ($this->hostname == '')) {
@@ -741,35 +707,18 @@ class App
                }
        }
 
-       public function get_hostname()
+       public function getHostName()
        {
-               if (Config::get('config', 'hostname') != '') {
-                       $this->hostname = Config::get('config', 'hostname');
+               if (Core\Config::get('config', 'hostname') != '') {
+                       $this->hostname = Core\Config::get('config', 'hostname');
                }
 
                return $this->hostname;
        }
 
-       public function get_path()
-       {
-               return $this->urlpath;
-       }
-
-       public function set_pager_total($n)
+       public function getURLPath()
        {
-               $this->pager['total'] = intval($n);
-       }
-
-       public function set_pager_itemspage($n)
-       {
-               $this->pager['itemspage'] = ((intval($n) > 0) ? intval($n) : 0);
-               $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];
-       }
-
-       public function set_pager_page($n)
-       {
-               $this->pager['page'] = $n;
-               $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];
+               return $this->urlPath;
        }
 
        /**
@@ -784,7 +733,7 @@ class App
         */
        public function initHead()
        {
-               $interval = ((local_user()) ? PConfig::get(local_user(), 'system', 'update_interval') : 40000);
+               $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 
                // If the update is 'deactivated' set it to the highest integer number (~24 days)
                if ($interval < 0) {
@@ -811,19 +760,16 @@ class App
 
                $this->registerStylesheet($stylesheet);
 
-               $shortcut_icon = Config::get('system', 'shortcut_icon');
+               $shortcut_icon = Core\Config::get('system', 'shortcut_icon');
                if ($shortcut_icon == '') {
                        $shortcut_icon = 'images/friendica-32.png';
                }
 
-               $touch_icon = Config::get('system', 'touch_icon');
+               $touch_icon = Core\Config::get('system', 'touch_icon');
                if ($touch_icon == '') {
                        $touch_icon = 'images/friendica-128.png';
                }
 
-               // get data wich is needed for infinite scroll on the network page
-               $infinite_scroll = infinite_scroll_data($this->module);
-
                Core\Addon::callHooks('head', $this->page['htmlhead']);
 
                $tpl = get_markup_template('head.tpl');
@@ -832,17 +778,16 @@ class App
                 * being first
                 */
                $this->page['htmlhead'] = replace_macros($tpl, [
-                       '$baseurl'         => $this->get_baseurl(),
+                       '$baseurl'         => $this->getBaseURL(),
                        '$local_user'      => local_user(),
                        '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
-                       '$delitem'         => L10n::t('Delete this item?'),
-                       '$showmore'        => L10n::t('show more'),
-                       '$showfewer'       => L10n::t('show fewer'),
+                       '$delitem'         => Core\L10n::t('Delete this item?'),
+                       '$showmore'        => Core\L10n::t('show more'),
+                       '$showfewer'       => Core\L10n::t('show fewer'),
                        '$update_interval' => $interval,
                        '$shortcut_icon'   => $shortcut_icon,
                        '$touch_icon'      => $touch_icon,
-                       '$infinite_scroll' => $infinite_scroll,
-                       '$block_public'    => intval(Config::get('system', 'block_public')),
+                       '$block_public'    => intval(Core\Config::get('system', 'block_public')),
                        '$stylesheets'     => $this->stylesheets,
                ]) . $this->page['htmlhead'];
        }
@@ -888,58 +833,28 @@ class App
 
                $tpl = get_markup_template('footer.tpl');
                $this->page['footer'] = replace_macros($tpl, [
-                       '$baseurl' => $this->get_baseurl(),
+                       '$baseurl' => $this->getBaseURL(),
                        '$footerScripts' => $this->footerScripts,
                ]) . $this->page['footer'];
        }
 
-       public function set_curl_code($code)
-       {
-               $this->curl_code = $code;
-       }
-
-       public function get_curl_code()
-       {
-               return $this->curl_code;
-       }
-
-       public function set_curl_content_type($content_type)
-       {
-               $this->curl_content_type = $content_type;
-       }
-
-       public function get_curl_content_type()
-       {
-               return $this->curl_content_type;
-       }
-
-       public function set_curl_headers($headers)
-       {
-               $this->curl_headers = $headers;
-       }
-
-       public function get_curl_headers()
-       {
-               return $this->curl_headers;
-       }
-
        /**
         * @brief Removes the base url from an url. This avoids some mixed content problems.
         *
-        * @param string $orig_url
+        * @param string $origURL
         *
         * @return string The cleaned url
         */
-       public function remove_baseurl($orig_url)
+       public function removeBaseURL($origURL)
        {
                // Remove the hostname from the url if it is an internal link
-               $nurl = normalise_link($orig_url);
-               $base = normalise_link($this->get_baseurl());
+               $nurl = normalise_link($origURL);
+               $base = normalise_link($this->getBaseURL());
                $url = str_replace($base . '/', '', $nurl);
 
                // if it is an external link return the orignal value
-               if ($url == normalise_link($orig_url)) {
-                       return $orig_url;
+               if ($url == normalise_link($origURL)) {
+                       return $origURL;
                } else {
                        return $url;
                }
@@ -950,10 +865,10 @@ class App
         *
         * @param string $class
         */
-       private function register_template_engine($class)
+       private function registerTemplateEngine($class)
        {
                $v = get_class_vars($class);
-               if (x($v, 'name')) {
+               if (!empty($v['name'])) {
                        $name = $v['name'];
                        $this->template_engines[$name] = $class;
                } else {
@@ -970,12 +885,9 @@ class App
         *
         * @return object Template Engine instance
         */
-       public function template_engine()
+       public function getTemplateEngine()
        {
-               $template_engine = 'smarty3';
-               if (x($this->theme, 'template_engine')) {
-                       $template_engine = $this->theme['template_engine'];
-               }
+               $template_engine = defaults($this->theme, 'template_engine', 'smarty3');
 
                if (isset($this->template_engines[$template_engine])) {
                        if (isset($this->template_engine_instance[$template_engine])) {
@@ -989,41 +901,75 @@ class App
                }
 
                echo "template engine <tt>$template_engine</tt> is not registered!\n";
-               killme();
+               exit();
        }
 
        /**
         * @brief Returns the active template engine.
         *
-        * @return string
+        * @return string the active template engine
         */
-       public function get_template_engine()
+       public function getActiveTemplateEngine()
        {
                return $this->theme['template_engine'];
        }
 
-       public function set_template_engine($engine = 'smarty3')
+       /**
+        * sets the active template engine
+        *
+        * @param string $engine the template engine (default is Smarty3)
+        */
+       public function setActiveTemplateEngine($engine = 'smarty3')
        {
                $this->theme['template_engine'] = $engine;
        }
 
-       public function get_template_ldelim($engine = 'smarty3')
+       /**
+        * Gets the right delimiter for a template engine
+        *
+        * Currently:
+        * Internal = ''
+        * Smarty3 = '{{'
+        *
+        * @param string $engine The template engine (default is Smarty3)
+        *
+        * @return string the right delimiter
+        */
+       public function getTemplateLeftDelimiter($engine = 'smarty3')
        {
                return $this->ldelim[$engine];
        }
 
-       public function get_template_rdelim($engine = 'smarty3')
+       /**
+        * Gets the left delimiter for a template engine
+        *
+        * Currently:
+        * Internal = ''
+        * Smarty3 = '}}'
+        *
+        * @param string $engine The template engine (default is Smarty3)
+        *
+        * @return string the left delimiter
+        */
+       public function getTemplateRightDelimiter($engine = 'smarty3')
        {
                return $this->rdelim[$engine];
        }
 
-       public function save_timestamp($stamp, $value)
+       /**
+        * Saves a timestamp for a value - f.e. a call
+        * Necessary for profiling Friendica
+        *
+        * @param int $timestamp the Timestamp
+        * @param string $value A value to profile
+        */
+       public function saveTimestamp($timestamp, $value)
        {
                if (!isset($this->config['system']['profiler']) || !$this->config['system']['profiler']) {
                        return;
                }
 
-               $duration = (float) (microtime(true) - $stamp);
+               $duration = (float) (microtime(true) - $timestamp);
 
                if (!isset($this->performance[$value])) {
                        // Prevent ugly E_NOTICE
@@ -1033,7 +979,7 @@ class App
                $this->performance[$value] += (float) $duration;
                $this->performance['marktime'] += (float) $duration;
 
-               $callstack = System::callstack();
+               $callstack = Core\System::callstack();
 
                if (!isset($this->callstack[$value][$callstack])) {
                        // Prevent ugly E_NOTICE
@@ -1043,19 +989,41 @@ class App
                $this->callstack[$value][$callstack] += (float) $duration;
        }
 
-       public function get_useragent()
+       /**
+        * Returns the current UserAgent as a String
+        *
+        * @return string the UserAgent as a String
+        */
+       public function getUserAgent()
        {
                return
                        FRIENDICA_PLATFORM . " '" .
                        FRIENDICA_CODENAME . "' " .
                        FRIENDICA_VERSION . '-' .
                        DB_UPDATE_VERSION . '; ' .
-                       $this->get_baseurl();
+                       $this->getBaseURL();
        }
 
-       public function is_friendica_app()
+       /**
+        * Checks, if the call is from the Friendica App
+        *
+        * Reason:
+        * The friendica client has problems with the GUID in the notify. this is some workaround
+        */
+       private function checkFriendicaApp()
        {
-               return $this->is_friendica_app;
+               // Friendica-Client
+               $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
+       }
+
+       /**
+        *      Is the call via the Friendica app? (not a "normale" call)
+        *
+        * @return bool true if it's from the Friendica app
+        */
+       public function isFriendicaApp()
+       {
+               return $this->isFriendicaApp;
        }
 
        /**
@@ -1064,10 +1032,10 @@ class App
         * This isn't a perfect solution. But we need this check very early.
         * So we cannot wait until the modules are loaded.
         *
-        * @return bool Is it a known backend?
+        * @param string $backend true, if the backend flag was set during App initialization
+        *
         */
-       public function is_backend()
-       {
+       private function checkBackend($backend) {
                static $backends = [
                        '_well_known',
                        'api',
@@ -1091,7 +1059,17 @@ class App
                ];
 
                // Check if current module is in backend or backend flag is set
-               return (in_array($this->module, $backends) || $this->backend);
+               $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
+       }
+
+       /**
+        * Returns true, if the call is from a backend node (f.e. from a worker)
+        *
+        * @return bool Is it a known backend?
+        */
+       public function isBackend()
+       {
+               return $this->isBackend;
        }
 
        /**
@@ -1109,13 +1087,13 @@ class App
                 *
                if ($this->is_backend()) {
                        $process = 'backend';
-                       $max_processes = Config::get('system', 'max_processes_backend');
+                       $max_processes = Core\Config::get('system', 'max_processes_backend');
                        if (intval($max_processes) == 0) {
                                $max_processes = 5;
                        }
                } else {
                        $process = 'frontend';
-                       $max_processes = Config::get('system', 'max_processes_frontend');
+                       $max_processes = Core\Config::get('system', 'max_processes_frontend');
                        if (intval($max_processes) == 0) {
                                $max_processes = 20;
                        }
@@ -1123,10 +1101,10 @@ class App
 
                $processlist = DBA::processlist();
                if ($processlist['list'] != '') {
-                       logger('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], LOGGER_DEBUG);
+                       Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Logger::DEBUG);
 
                        if ($processlist['amount'] > $max_processes) {
-                               logger('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', LOGGER_DEBUG);
+                               Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Logger::DEBUG);
                                return true;
                        }
                }
@@ -1139,9 +1117,9 @@ class App
         *
         * @return bool Is the memory limit reached?
         */
-       public function min_memory_reached()
+       public function isMinMemoryReached()
        {
-               $min_memory = Config::get('system', 'min_memory', 0);
+               $min_memory = Core\Config::get('system', 'min_memory', 0);
                if ($min_memory == 0) {
                        return false;
                }
@@ -1172,7 +1150,7 @@ class App
                $reached = ($free < $min_memory);
 
                if ($reached) {
-                       logger('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, LOGGER_DEBUG);
+                       Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Logger::DEBUG);
                }
 
                return $reached;
@@ -1185,24 +1163,24 @@ class App
         */
        public function isMaxLoadReached()
        {
-               if ($this->is_backend()) {
+               if ($this->isBackend()) {
                        $process = 'backend';
-                       $maxsysload = intval(Config::get('system', 'maxloadavg'));
+                       $maxsysload = intval(Core\Config::get('system', 'maxloadavg'));
                        if ($maxsysload < 1) {
                                $maxsysload = 50;
                        }
                } else {
                        $process = 'frontend';
-                       $maxsysload = intval(Config::get('system', 'maxloadavg_frontend'));
+                       $maxsysload = intval(Core\Config::get('system', 'maxloadavg_frontend'));
                        if ($maxsysload < 1) {
                                $maxsysload = 50;
                        }
                }
 
-               $load = current_load();
+               $load = Core\System::currentLoad();
                if ($load) {
                        if (intval($load) > $maxsysload) {
-                               logger('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
+                               Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
                                return true;
                        }
                }
@@ -1234,17 +1212,17 @@ class App
                        }
                }
 
-               if ($this->min_memory_reached()) {
+               if ($this->isMinMemoryReached()) {
                        return;
                }
 
                if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
-                       $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->get_basepath());
+                       $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
                } else {
-                       $resource = proc_open($cmdline . ' &', [], $foo, $this->get_basepath());
+                       $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
                }
                if (!is_resource($resource)) {
-                       logger('We got no resource for command ' . $cmdline, LOGGER_DEBUG);
+                       Core\Logger::log('We got no resource for command ' . $cmdline, Logger::DEBUG);
                        return;
                }
                proc_close($resource);
@@ -1257,7 +1235,7 @@ class App
         *
         * @return string system username
         */
-       private static function systemuser()
+       private static function getSystemUser()
        {
                if (!function_exists('posix_getpwuid') || !function_exists('posix_geteuid')) {
                        return '';
@@ -1272,30 +1250,30 @@ class App
         *
         * @return boolean the directory is usable
         */
-       public static function directory_usable($directory, $check_writable = true)
+       public static function isDirectoryUsable($directory, $check_writable = true)
        {
                if ($directory == '') {
-                       logger('Directory is empty. This shouldn\'t happen.', LOGGER_DEBUG);
+                       Core\Logger::log('Directory is empty. This shouldn\'t happen.', Logger::DEBUG);
                        return false;
                }
 
                if (!file_exists($directory)) {
-                       logger('Path "' . $directory . '" does not exist for user ' . self::systemuser(), LOGGER_DEBUG);
+                       Core\Logger::log('Path "' . $directory . '" does not exist for user ' . self::getSystemUser(), Logger::DEBUG);
                        return false;
                }
 
                if (is_file($directory)) {
-                       logger('Path "' . $directory . '" is a file for user ' . self::systemuser(), LOGGER_DEBUG);
+                       Core\Logger::log('Path "' . $directory . '" is a file for user ' . self::getSystemUser(), Logger::DEBUG);
                        return false;
                }
 
                if (!is_dir($directory)) {
-                       logger('Path "' . $directory . '" is not a directory for user ' . self::systemuser(), LOGGER_DEBUG);
+                       Core\Logger::log('Path "' . $directory . '" is not a directory for user ' . self::getSystemUser(), Logger::DEBUG);
                        return false;
                }
 
                if ($check_writable && !is_writable($directory)) {
-                       logger('Path "' . $directory . '" is not writable for user ' . self::systemuser(), LOGGER_DEBUG);
+                       Core\Logger::log('Path "' . $directory . '" is not writable for user ' . self::getSystemUser(), Logger::DEBUG);
                        return false;
                }
 
@@ -1306,6 +1284,8 @@ class App
         * @param string $cat     Config category
         * @param string $k       Config key
         * @param mixed  $default Default value if it isn't set
+        *
+        * @return string Returns the value of the Config entry
         */
        public function getConfigValue($cat, $k, $default = null)
        {
@@ -1388,6 +1368,8 @@ class App
         * @param string $cat     Config category
         * @param string $k       Config key
         * @param mixed  $default Default value if key isn't set
+        *
+        * @return string The value of the config entry
         */
        public function getPConfigValue($uid, $cat, $k, $default = null)
        {
@@ -1447,9 +1429,9 @@ class App
         */
        public function getSenderEmailAddress()
        {
-               $sender_email = Config::get('config', 'sender_email');
+               $sender_email = Core\Config::get('config', 'sender_email');
                if (empty($sender_email)) {
-                       $hostname = $this->get_hostname();
+                       $hostname = $this->getHostName();
                        if (strpos($hostname, ':')) {
                                $hostname = substr($hostname, 0, strpos($hostname, ':'));
                        }
@@ -1463,11 +1445,11 @@ class App
        /**
         * Returns the current theme name.
         *
-        * @return string
+        * @return string the name of the current theme
         */
        public function getCurrentTheme()
        {
-               if ($this->isInstallMode()) {
+               if ($this->getMode()->isInstall()) {
                        return '';
                }
 
@@ -1476,7 +1458,7 @@ class App
                /// https://github.com/friendica/friendica/issues/5092)
                $this->computeCurrentTheme();
 
-               return $this->current_theme;
+               return $this->currentTheme;
        }
 
        /**
@@ -1486,15 +1468,15 @@ class App
         */
        private function computeCurrentTheme()
        {
-               $system_theme = Config::get('system', 'theme');
+               $system_theme = Core\Config::get('system', 'theme');
                if (!$system_theme) {
-                       throw new Exception(L10n::t('No system theme config value set.'));
+                       throw new Exception(Core\L10n::t('No system theme config value set.'));
                }
 
                // Sane default
-               $this->current_theme = $system_theme;
+               $this->currentTheme = $system_theme;
 
-               $allowed_themes = explode(',', Config::get('system', 'allowed_themes', $system_theme));
+               $allowed_themes = explode(',', Core\Config::get('system', 'allowed_themes', $system_theme));
 
                $page_theme = null;
                // Find the theme that belongs to the user whose stuff we are looking at
@@ -1502,7 +1484,7 @@ class App
                        // Allow folks to override user themes and always use their own on their own site.
                        // This works only if the user is on the same server
                        $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
-                       if (DBA::isResult($user) && !PConfig::get(local_user(), 'system', 'always_my_theme')) {
+                       if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
                                $page_theme = $user['theme'];
                        }
                }
@@ -1511,7 +1493,7 @@ class App
 
                // Specific mobile theme override
                if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
-                       $system_mobile_theme = Config::get('system', 'mobile-theme');
+                       $system_mobile_theme = Core\Config::get('system', 'mobile-theme');
                        $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 
                        // --- means same mobile theme as desktop
@@ -1531,7 +1513,7 @@ class App
                        && (file_exists('view/theme/' . $theme_name . '/style.css')
                        || file_exists('view/theme/' . $theme_name . '/style.php'))
                ) {
-                       $this->current_theme = $theme_name;
+                       $this->currentTheme = $theme_name;
                }
        }
 
@@ -1546,4 +1528,469 @@ class App
        {
                return Core\Theme::getStylesheetPath($this->getCurrentTheme());
        }
+
+       /**
+        * Check if request was an AJAX (xmlhttprequest) request.
+        *
+        * @return boolean true if it was an AJAX request
+        */
+       public function isAjax()
+       {
+               return $this->isAjax;
+       }
+
+       /**
+        * Returns the value of a argv key
+        * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
+        *
+        * @param int $position the position of the argument
+        * @param mixed $default the default value if not found
+        *
+        * @return mixed returns the value of the argument
+        */
+       public function getArgumentValue($position, $default = '')
+       {
+               if (array_key_exists($position, $this->argv)) {
+                       return $this->argv[$position];
+               }
+
+               return $default;
+       }
+
+       /**
+        * Sets the base url for use in cmdline programs which don't have
+        * $_SERVER variables
+        */
+       public function checkURL()
+       {
+               $url = Core\Config::get('system', 'url');
+
+               // if the url isn't set or the stored url is radically different
+               // than the currently visited url, store the current value accordingly.
+               // "Radically different" ignores common variations such as http vs https
+               // and www.example.com vs example.com.
+               // We will only change the url to an ip address if there is no existing setting
+
+               if (empty($url) || (!link_compare($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->getHostName()))) {
+                       Core\Config::set('system', 'url', $this->getBaseURL());
+               }
+       }
+
+       /**
+        * Frontend App script
+        *
+        * The App object behaves like a container and a dispatcher at the same time, including a representation of the
+        * request and a representation of the response.
+        *
+        * This probably should change to limit the size of this monster method.
+        */
+       public function runFrontend()
+       {
+               // Missing DB connection: ERROR
+               if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
+                       Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
+               }
+
+               // Max Load Average reached: ERROR
+               if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
+                       header('Retry-After: 120');
+                       header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
+
+                       Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
+               }
+
+               if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
+                       Core\System::httpExit(404);
+               }
+
+               if (!$this->getMode()->isInstall()) {
+                       // Force SSL redirection
+                       if (Core\Config::get('system', 'force_ssl') && ($this->getScheme() == "http")
+                               && intval(Core\Config::get('system', 'ssl_policy')) == SSL_POLICY_FULL
+                               && strpos($this->getBaseURL(), 'https://') === 0
+                               && $_SERVER['REQUEST_METHOD'] == 'GET') {
+                               header('HTTP/1.1 302 Moved Temporarily');
+                               header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
+                               exit();
+                       }
+
+                       Core\Session::init();
+                       Core\Addon::callHooks('init_1');
+               }
+
+               // Exclude the backend processes from the session management
+               if (!$this->isBackend()) {
+                       $stamp1 = microtime(true);
+                       session_start();
+                       $this->saveTimestamp($stamp1, 'parser');
+                       Core\L10n::setSessionVariable();
+                       Core\L10n::setLangFromSession();
+               } else {
+                       $_SESSION = [];
+                       Core\Worker::executeIfIdle();
+               }
+
+               // ZRL
+               if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
+                       $this->query_string = Model\Profile::stripZrls($this->query_string);
+                       if (!local_user()) {
+                               // Only continue when the given profile link seems valid
+                               // Valid profile links contain a path with "/profile/" and no query parameters
+                               if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
+                                       strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
+                                       if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
+                                               $_SESSION['my_url'] = $_GET['zrl'];
+                                               $_SESSION['authenticated'] = 0;
+                                       }
+                                       Model\Profile::zrlInit($this);
+                               } else {
+                                       // Someone came with an invalid parameter, maybe as a DDoS attempt
+                                       // We simply stop processing here
+                                       Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Logger::DEBUG);
+                                       Core\System::httpExit(403, ['title' => '403 Forbidden']);
+                               }
+                       }
+               }
+
+               if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
+                       $token = $_GET['owt'];
+                       $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
+                       Model\Profile::openWebAuthInit($token);
+               }
+
+               Module\Login::sessionAuth();
+
+               if (empty($_SESSION['authenticated'])) {
+                       header('X-Account-Management-Status: none');
+               }
+
+               $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
+               $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
+               $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
+
+               /*
+                * check_config() is responsible for running update scripts. These automatically
+                * update the DB schema whenever we push a new one out. It also checks to see if
+                * any addons have been added or removed and reacts accordingly.
+                */
+
+               // in install mode, any url loads install module
+               // but we need "view" module for stylesheet
+               if ($this->getMode()->isInstall() && $this->module != 'view') {
+                       $this->module = 'install';
+               } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
+                       $this->module = 'maintenance';
+               } else {
+                       $this->checkURL();
+                       check_db(false);
+                       Core\Addon::loadAddons();
+                       Core\Hook::loadHooks();
+               }
+
+               $this->page = [
+                       'aside' => '',
+                       'bottom' => '',
+                       'content' => '',
+                       'footer' => '',
+                       'htmlhead' => '',
+                       'nav' => '',
+                       'page_title' => '',
+                       'right_aside' => '',
+                       'template' => '',
+                       'title' => ''
+               ];
+
+               if (strlen($this->module)) {
+                       // Compatibility with the Android Diaspora client
+                       if ($this->module == 'stream') {
+                               $this->internalRedirect('network?f=&order=post');
+                       }
+
+                       if ($this->module == 'conversations') {
+                               $this->internalRedirect('message');
+                       }
+
+                       if ($this->module == 'commented') {
+                               $this->internalRedirect('network?f=&order=comment');
+                       }
+
+                       if ($this->module == 'liked') {
+                               $this->internalRedirect('network?f=&order=comment');
+                       }
+
+                       if ($this->module == 'activity') {
+                               $this->internalRedirect('network/?f=&conv=1');
+                       }
+
+                       if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
+                               $this->internalRedirect('bookmarklet');
+                       }
+
+                       if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
+                               $this->internalRedirect('settings');
+                       }
+
+                       if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
+                               $this->internalRedirect('search');
+                       }
+
+                       // Compatibility with the Firefox App
+                       if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
+                               $this->module = "login";
+                       }
+
+                       $privateapps = Core\Config::get('config', 'private_addons', false);
+                       if (Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
+                               //Check if module is an app and if public access to apps is allowed or not
+                               if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
+                                       info(Core\L10n::t("You must be logged in to use addons. "));
+                               } else {
+                                       include_once "addon/{$this->module}/{$this->module}.php";
+                                       if (function_exists($this->module . '_module')) {
+                                               LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
+                                               $this->module_class = 'Friendica\\LegacyModule';
+                                               $this->module_loaded = true;
+                                       }
+                               }
+                       }
+
+                       // Controller class routing
+                       if (! $this->module_loaded && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
+                               $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
+                               $this->module_loaded = true;
+                       }
+
+                       /* If not, next look for a 'standard' program module in the 'mod' directory
+                        * We emulate a Module class through the LegacyModule class
+                        */
+                       if (! $this->module_loaded && file_exists("mod/{$this->module}.php")) {
+                               LegacyModule::setModuleFile("mod/{$this->module}.php");
+                               $this->module_class = 'Friendica\\LegacyModule';
+                               $this->module_loaded = true;
+                       }
+
+                       /* The URL provided does not resolve to a valid module.
+                        *
+                        * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
+                        * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
+                        * we are going to trap this and redirect back to the requested page. As long as you don't have a critical error on your page
+                        * this will often succeed and eventually do the right thing.
+                        *
+                        * Otherwise we are going to emit a 404 not found.
+                        */
+                       if (! $this->module_loaded) {
+                               // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
+                               if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
+                                       exit();
+                               }
+
+                               if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
+                                       Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
+                                       $this->internalRedirect($_SERVER['REQUEST_URI']);
+                               }
+
+                               Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Logger::DEBUG);
+
+                               header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
+                               $tpl = get_markup_template("404.tpl");
+                               $this->page['content'] = replace_macros($tpl, [
+                                       '$message' =>  Core\L10n::t('Page not found.')
+                               ]);
+                       }
+               }
+
+               // Load current theme info
+               $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
+               if (file_exists($theme_info_file)) {
+                       require_once $theme_info_file;
+               }
+
+               // initialise content region
+               if ($this->getMode()->isNormal()) {
+                       Core\Addon::callHooks('page_content_top', $this->page['content']);
+               }
+
+               // Call module functions
+               if ($this->module_loaded) {
+                       $this->page['page_title'] = $this->module;
+                       $placeholder = '';
+
+                       Core\Addon::callHooks($this->module . '_mod_init', $placeholder);
+
+                       call_user_func([$this->module_class, 'init']);
+
+                       // "rawContent" is especially meant for technical endpoints.
+                       // This endpoint doesn't need any theme initialization or other comparable stuff.
+                       if (!$this->error) {
+                               call_user_func([$this->module_class, 'rawContent']);
+                       }
+
+                       if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
+                               $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
+                               $func($this);
+                       }
+
+                       if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
+                               Core\Addon::callHooks($this->module . '_mod_post', $_POST);
+                               call_user_func([$this->module_class, 'post']);
+                       }
+
+                       if (! $this->error) {
+                               Core\Addon::callHooks($this->module . '_mod_afterpost', $placeholder);
+                               call_user_func([$this->module_class, 'afterpost']);
+                       }
+
+                       if (! $this->error) {
+                               $arr = ['content' => $this->page['content']];
+                               Core\Addon::callHooks($this->module . '_mod_content', $arr);
+                               $this->page['content'] = $arr['content'];
+                               $arr = ['content' => call_user_func([$this->module_class, 'content'])];
+                               Core\Addon::callHooks($this->module . '_mod_aftercontent', $arr);
+                               $this->page['content'] .= $arr['content'];
+                       }
+
+                       if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_content_loaded')) {
+                               $func = str_replace('-', '_', $this->getCurrentTheme()) . '_content_loaded';
+                               $func($this);
+                       }
+               }
+
+               /* Create the page head after setting the language
+                * and getting any auth credentials.
+                *
+                * Moved initHead() and initFooter() to after
+                * all the module functions have executed so that all
+                * theme choices made by the modules can take effect.
+                */
+               $this->initHead();
+
+               /* Build the page ending -- this is stuff that goes right before
+                * the closing </body> tag
+                */
+               $this->initFooter();
+
+               /* now that we've been through the module content, see if the page reported
+                * a permission problem and if so, a 403 response would seem to be in order.
+                */
+               if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
+                       header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
+               }
+
+               // Report anything which needs to be communicated in the notification area (before the main body)
+               Core\Addon::callHooks('page_end', $this->page['content']);
+
+               // Add the navigation (menu) template
+               if ($this->module != 'install' && $this->module != 'maintenance') {
+                       $this->page['htmlhead'] .= replace_macros(get_markup_template('nav_head.tpl'), []);
+                       $this->page['nav']       = Content\Nav::build($this);
+               }
+
+               // Build the page - now that we have all the components
+               if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
+                       $doc = new DOMDocument();
+
+                       $target = new DOMDocument();
+                       $target->loadXML("<root></root>");
+
+                       $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
+
+                       /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
+                       @$doc->loadHTML($content);
+
+                       $xpath = new DOMXPath($doc);
+
+                       $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
+
+                       foreach ($list as $item) {
+                               $item = $target->importNode($item, true);
+
+                               // And then append it to the target
+                               $target->documentElement->appendChild($item);
+                       }
+               }
+
+               if (isset($_GET["mode"]) && ($_GET["mode"] == "raw")) {
+                       header("Content-type: text/html; charset=utf-8");
+
+                       echo substr($target->saveHTML(), 6, -8);
+
+                       exit();
+               }
+
+               $page    = $this->page;
+               $profile = $this->profile;
+
+               header("X-Friendica-Version: " . FRIENDICA_VERSION);
+               header("Content-type: text/html; charset=utf-8");
+
+               if (Core\Config::get('system', 'hsts') && (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
+                       header("Strict-Transport-Security: max-age=31536000");
+               }
+
+               // Some security stuff
+               header('X-Content-Type-Options: nosniff');
+               header('X-XSS-Protection: 1; mode=block');
+               header('X-Permitted-Cross-Domain-Policies: none');
+               header('X-Frame-Options: sameorigin');
+
+               // Things like embedded OSM maps don't work, when this is enabled
+               // header("Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; connect-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'; img-src 'self' https: data:; media-src 'self' https:; child-src 'self' https:; object-src 'none'");
+
+               /* We use $_GET["mode"] for special page templates. So we will check if we have
+                * to load another page template than the default one.
+                * The page templates are located in /view/php/ or in the theme directory.
+                */
+               if (isset($_GET["mode"])) {
+                       $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
+               }
+
+               // If there is no page template use the default page template
+               if (empty($template)) {
+                       $template = Core\Theme::getPathForFile("default.php");
+               }
+
+               // Theme templates expect $a as an App instance
+               $a = $this;
+
+               // Used as is in view/php/default.php
+               $lang = Core\L10n::getCurrentLang();
+
+               /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
+               require_once $template;
+       }
+
+       /**
+        * Redirects to another module relative to the current Friendica base.
+        * If you want to redirect to a external URL, use System::externalRedirectTo()
+        *
+        * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
+        * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
+        *
+        * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
+        */
+       public function internalRedirect($toUrl = '', $ssl = false)
+       {
+               if (filter_var($toUrl, FILTER_VALIDATE_URL)) {
+                       throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
+               }
+
+               $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
+               Core\System::externalRedirect($redirectTo);
+       }
+
+       /**
+        * Automatically redirects to relative or absolute URL
+        * Should only be used if it isn't clear if the URL is either internal or external
+        *
+        * @param string $toUrl The target URL
+        *
+        */
+       public function redirect($toUrl)
+       {
+               if (filter_var($toUrl, FILTER_VALIDATE_URL)) {
+                       Core\System::externalRedirect($toUrl);
+               } else {
+                       $this->internalRedirect($toUrl);
+               }
+       }
 }