src/App.php

   1 <?php
   2 /**
   3  * @file src/App.php
   4  */
   5 namespace Friendica;
   6
   7 use Detection\MobileDetect;
   8 use DOMDocument;
   9 use DOMXPath;
  10 use Exception;
  11 use Friendica\Core\Config\ConfigCache;
  12 use Friendica\Core\Config\ConfigCacheLoader;
  13 use Friendica\Database\DBA;
  14 use Friendica\Factory\ConfigFactory;
  15 use Friendica\Network\HTTPException\InternalServerErrorException;
  16 use Friendica\Util\BasePath;
  17 use Psr\Log\LoggerInterface;
  18
  19 /**
  20  *
  21  * class: App
  22  *
  23  * @brief Our main application structure for the life of this page.
  24  *
  25  * Primarily deals with the URL that got us here
  26  * and tries to make some sense of it, and
  27  * stores our page contents and config storage
  28  * and anything else that might need to be passed around
  29  * before we spit the page out.
  30  *
  31  */
  32 class App
  33 {
  34         public $module_loaded = false;
  35         public $module_class = null;
  36         public $query_string = '';
  37         public $page = [];
  38         public $profile;
  39         public $profile_uid;
  40         public $user;
  41         public $cid;
  42         public $contact;
  43         public $contacts;
  44         public $page_contact;
  45         public $content;
  46         public $data = [];
  47         public $error = false;
  48         public $cmd = '';
  49         public $argv;
  50         public $argc;
  51         public $module;
  52         public $timezone;
  53         public $interactive = true;
  54         public $identities;
  55         public $is_mobile = false;
  56         public $is_tablet = false;
  57         public $performance = [];
  58         public $callstack = [];
  59         public $theme_info = [];
  60         public $category;
  61         // Allow themes to control internal parameters
  62         // by changing App values in theme.php
  63
  64         public $sourcename = '';
  65         public $videowidth = 425;
  66         public $videoheight = 350;
  67         public $force_max_items = 0;
  68         public $theme_events_in_profile = true;
  69
  70         public $stylesheets = [];
  71         public $footerScripts = [];
  72
  73         /**
  74          * @var App\Mode The Mode of the Application
  75          */
  76         private $mode;
  77
  78         /**
  79          * @var string The App base path
  80          */
  81         private $basePath;
  82
  83         /**
  84          * @var string The App URL path
  85          */
  86         private $urlPath;
  87
  88         /**
  89          * @var bool true, if the call is from the Friendica APP, otherwise false
  90          */
  91         private $isFriendicaApp;
  92
  93         /**
  94          * @var bool true, if the call is from an backend node (f.e. worker)
  95          */
  96         private $isBackend;
  97
  98         /**
  99          * @var string The name of the current theme
 100          */
 101         private $currentTheme;
 102
 103         /**
 104          * @var bool check if request was an AJAX (xmlhttprequest) request
 105          */
 106         private $isAjax;
 107
 108         /**
 109          * @var MobileDetect
 110          */
 111         public $mobileDetect;
 112
 113         /**
 114          * @var LoggerInterface The current logger of this App
 115          */
 116         private $logger;
 117
 118         /**
 119          * @var ConfigCache The cached config
 120          */
 121         private $config;
 122
 123         /**
 124          * Returns the current config cache of this node
 125          *
 126          * @return ConfigCache
 127          */
 128         public function getConfig()
 129         {
 130                 return $this->config;
 131         }
 132
 133         /**
 134          * The basepath of this app
 135          *
 136          * @return string
 137          */
 138         public function getBasePath()
 139         {
 140                 return $this->basePath;
 141         }
 142
 143         /**
 144          * Register a stylesheet file path to be included in the <head> tag of every page.
 145          * Inclusion is done in App->initHead().
 146          * The path can be absolute or relative to the Friendica installation base folder.
 147          *
 148          * @see initHead()
 149          *
 150          * @param string $path
 151          * @throws InternalServerErrorException
 152          */
 153         public function registerStylesheet($path)
 154         {
 155                 $url = str_replace($this->basePath . DIRECTORY_SEPARATOR, '', $path);
 156
 157                 $this->stylesheets[] = trim($url, '/');
 158         }
 159
 160         /**
 161          * Register a javascript file path to be included in the <footer> tag of every page.
 162          * Inclusion is done in App->initFooter().
 163          * The path can be absolute or relative to the Friendica installation base folder.
 164          *
 165          * @see initFooter()
 166          *
 167          * @param string $path
 168          * @throws InternalServerErrorException
 169          */
 170         public function registerFooterScript($path)
 171         {
 172                 $url = str_replace($this->basePath . DIRECTORY_SEPARATOR, '', $path);
 173
 174                 $this->footerScripts[] = trim($url, '/');
 175         }
 176
 177         public $process_id;
 178         public $queue;
 179         private $scheme;
 180         private $hostname;
 181
 182         /**
 183          * @brief App constructor.
 184          *
 185          * @param ConfigCache      $config    The Cached Config
 186          * @param LoggerInterface  $logger    Logger of this application
 187          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 188          *
 189          * @throws Exception if the Basepath is not usable
 190          */
 191         public function __construct(ConfigCache $config, LoggerInterface $logger, $isBackend = true)
 192         {
 193                 $this->config   = $config;
 194                 $this->logger   = $logger;
 195                 $this->basePath = $this->config->get('system', 'basepath');
 196
 197                 if (!BasePath::isDirectoryUsable($this->basePath, false)) {
 198                         throw new Exception('Basepath ' . $this->basePath . ' isn\'t usable.');
 199                 }
 200                 $this->basePath = rtrim($this->basePath, DIRECTORY_SEPARATOR);
 201
 202                 BaseObject::setApp($this);
 203
 204                 $this->checkBackend($isBackend);
 205                 $this->checkFriendicaApp();
 206
 207                 $this->performance['start'] = microtime(true);
 208                 $this->performance['database'] = 0;
 209                 $this->performance['database_write'] = 0;
 210                 $this->performance['cache'] = 0;
 211                 $this->performance['cache_write'] = 0;
 212                 $this->performance['network'] = 0;
 213                 $this->performance['file'] = 0;
 214                 $this->performance['rendering'] = 0;
 215                 $this->performance['parser'] = 0;
 216                 $this->performance['marktime'] = 0;
 217                 $this->performance['markstart'] = microtime(true);
 218
 219                 $this->callstack['database'] = [];
 220                 $this->callstack['database_write'] = [];
 221                 $this->callstack['cache'] = [];
 222                 $this->callstack['cache_write'] = [];
 223                 $this->callstack['network'] = [];
 224                 $this->callstack['file'] = [];
 225                 $this->callstack['rendering'] = [];
 226                 $this->callstack['parser'] = [];
 227
 228                 $this->mode = new App\Mode($this->basePath);
 229
 230                 $this->reload();
 231
 232                 set_time_limit(0);
 233
 234                 // This has to be quite large to deal with embedded private photos
 235                 ini_set('pcre.backtrack_limit', 500000);
 236
 237                 $this->scheme = 'http';
 238
 239                 if (!empty($_SERVER['HTTPS']) ||
 240                         !empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
 241                         !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
 242                         !empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
 243                         !empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
 244                         !empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
 245                 ) {
 246                         $this->scheme = 'https';
 247                 }
 248
 249                 if (!empty($_SERVER['SERVER_NAME'])) {
 250                         $this->hostname = $_SERVER['SERVER_NAME'];
 251
 252                         if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
 253                                 $this->hostname .= ':' . $_SERVER['SERVER_PORT'];
 254                         }
 255                 }
 256
 257                 set_include_path(
 258                         get_include_path() . PATH_SEPARATOR
 259                         . $this->basePath . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 260                         . $this->basePath . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 261                         . $this->basePath);
 262
 263                 if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
 264                         $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
 265                 } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
 266                         $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
 267                 }
 268
 269                 // removing trailing / - maybe a nginx problem
 270                 $this->query_string = ltrim($this->query_string, '/');
 271
 272                 if (!empty($_GET['pagename'])) {
 273                         $this->cmd = trim($_GET['pagename'], '/\\');
 274                 } elseif (!empty($_GET['q'])) {
 275                         $this->cmd = trim($_GET['q'], '/\\');
 276                 }
 277
 278                 // fix query_string
 279                 $this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
 280
 281                 // unix style "homedir"
 282                 if (substr($this->cmd, 0, 1) === '~') {
 283                         $this->cmd = 'profile/' . substr($this->cmd, 1);
 284                 }
 285
 286                 // Diaspora style profile url
 287                 if (substr($this->cmd, 0, 2) === 'u/') {
 288                         $this->cmd = 'profile/' . substr($this->cmd, 2);
 289                 }
 290
 291                 /*
 292                  * Break the URL path into C style argc/argv style arguments for our
 293                  * modules. Given "http://example.com/module/arg1/arg2", $this->argc
 294                  * will be 3 (integer) and $this->argv will contain:
 295                  *   [0] => 'module'
 296                  *   [1] => 'arg1'
 297                  *   [2] => 'arg2'
 298                  *
 299                  *
 300                  * There will always be one argument. If provided a naked domain
 301                  * URL, $this->argv[0] is set to "home".
 302                  */
 303
 304                 $this->argv = explode('/', $this->cmd);
 305                 $this->argc = count($this->argv);
 306                 if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
 307                         $this->module = str_replace('.', '_', $this->argv[0]);
 308                         $this->module = str_replace('-', '_', $this->module);
 309                 } else {
 310                         $this->argc = 1;
 311                         $this->argv = ['home'];
 312                         $this->module = 'home';
 313                 }
 314
 315                 // Detect mobile devices
 316                 $mobile_detect = new MobileDetect();
 317
 318                 $this->mobileDetect = $mobile_detect;
 319
 320                 $this->is_mobile = $mobile_detect->isMobile();
 321                 $this->is_tablet = $mobile_detect->isTablet();
 322
 323                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 324
 325                 // Register template engines
 326                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 327         }
 328
 329         /**
 330          * Returns the Mode of the Application
 331          *
 332          * @return App\Mode The Application Mode
 333          *
 334          * @throws InternalServerErrorException when the mode isn't created
 335          */
 336         public function getMode()
 337         {
 338                 if (empty($this->mode)) {
 339                         throw new InternalServerErrorException('Mode of the Application is not defined');
 340                 }
 341
 342                 return $this->mode;
 343         }
 344
 345         /**
 346          * Returns the Logger of the Application
 347          *
 348          * @return LoggerInterface The Logger
 349          * @throws InternalServerErrorException when the logger isn't created
 350          */
 351         public function getLogger()
 352         {
 353                 if (empty($this->logger)) {
 354                         throw new InternalServerErrorException('Logger of the Application is not defined');
 355                 }
 356
 357                 return $this->logger;
 358         }
 359
 360         /**
 361          * Reloads the whole app instance
 362          */
 363         public function reload()
 364         {
 365                 Core\Config::init($this->config);
 366                 Core\PConfig::init($this->config);
 367
 368                 $this->loadDatabase();
 369
 370                 $this->getMode()->determine($this->basePath);
 371
 372                 $this->determineURLPath();
 373
 374                 if ($this->getMode()->has(App\Mode::DBCONFIGAVAILABLE)) {
 375                         $adapterType = $this->config->get('system', 'config_adapter');
 376                         $adapter = ConfigFactory::createConfig($adapterType, $this->config);
 377                         Core\Config::setAdapter($adapter);
 378                         $adapterP = ConfigFactory::createPConfig($adapterType, $this->config);
 379                         Core\PConfig::setAdapter($adapterP);
 380                         Core\Config::load();
 381                 }
 382
 383                 // again because DB-config could change the config
 384                 $this->getMode()->determine($this->basePath);
 385
 386                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 387                         Core\Hook::loadHooks();
 388                         $loader = new ConfigCacheLoader($this->basePath);
 389                         Core\Hook::callAll('load_config', $loader);
 390                         $this->config->loadConfigArray($loader->loadAddonConfig(), true);
 391                 }
 392
 393                 $this->loadDefaultTimezone();
 394
 395                 Core\L10n::init();
 396
 397                 $this->process_id = Core\System::processID('log');
 398
 399                 Core\Logger::setLogger($this->logger);
 400         }
 401
 402         /**
 403          * Loads the default timezone
 404          *
 405          * Include support for legacy $default_timezone
 406          *
 407          * @global string $default_timezone
 408          */
 409         private function loadDefaultTimezone()
 410         {
 411                 if ($this->config->get('system', 'default_timezone')) {
 412                         $this->timezone = $this->config->get('system', 'default_timezone');
 413                 } else {
 414                         global $default_timezone;
 415                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 416                 }
 417
 418                 if ($this->timezone) {
 419                         date_default_timezone_set($this->timezone);
 420                 }
 421         }
 422
 423         /**
 424          * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
 425          */
 426         private function determineURLPath()
 427         {
 428                 /* Relative script path to the web server root
 429                  * Not all of those $_SERVER properties can be present, so we do by inverse priority order
 430                  */
 431                 $relative_script_path = '';
 432                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
 433                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
 434                 $relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
 435                 $relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
 436                 $relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
 437
 438                 $this->urlPath = $this->config->get('system', 'urlpath');
 439
 440                 /* $relative_script_path gives /relative/path/to/friendica/module/parameter
 441                  * QUERY_STRING gives pagename=module/parameter
 442                  *
 443                  * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
 444                  */
 445                 if (!empty($relative_script_path)) {
 446                         // Module
 447                         if (!empty($_SERVER['QUERY_STRING'])) {
 448                                 $path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
 449                         } else {
 450                                 // Root page
 451                                 $path = trim($relative_script_path, '/');
 452                         }
 453
 454                         if ($path && $path != $this->urlPath) {
 455                                 $this->urlPath = $path;
 456                         }
 457                 }
 458         }
 459
 460         public function loadDatabase()
 461         {
 462                 if (DBA::connected()) {
 463                         return;
 464                 }
 465
 466                 $db_host = $this->config->get('database', 'hostname');
 467                 $db_user = $this->config->get('database', 'username');
 468                 $db_pass = $this->config->get('database', 'password');
 469                 $db_data = $this->config->get('database', 'database');
 470                 $charset = $this->config->get('database', 'charset');
 471
 472                 // Use environment variables for mysql if they are set beforehand
 473                 if (!empty(getenv('MYSQL_HOST'))
 474                         && !empty(getenv('MYSQL_USERNAME') || !empty(getenv('MYSQL_USER')))
 475                         && getenv('MYSQL_PASSWORD') !== false
 476                         && !empty(getenv('MYSQL_DATABASE')))
 477                 {
 478                         $db_host = getenv('MYSQL_HOST');
 479                         if (!empty(getenv('MYSQL_PORT'))) {
 480                                 $db_host .= ':' . getenv('MYSQL_PORT');
 481                         }
 482                         if (!empty(getenv('MYSQL_USERNAME'))) {
 483                                 $db_user = getenv('MYSQL_USERNAME');
 484                         } else {
 485                                 $db_user = getenv('MYSQL_USER');
 486                         }
 487                         $db_pass = (string) getenv('MYSQL_PASSWORD');
 488                         $db_data = getenv('MYSQL_DATABASE');
 489                 }
 490
 491                 $stamp1 = microtime(true);
 492
 493                 if (DBA::connect($this->config, $db_host, $db_user, $db_pass, $db_data, $charset)) {
 494                         // Loads DB_UPDATE_VERSION constant
 495                         Database\DBStructure::definition($this->basePath, false);
 496                 }
 497
 498                 unset($db_host, $db_user, $db_pass, $db_data, $charset);
 499
 500                 $this->saveTimestamp($stamp1, 'network');
 501         }
 502
 503         public function getScheme()
 504         {
 505                 return $this->scheme;
 506         }
 507
 508         /**
 509          * @brief Retrieves the Friendica instance base URL
 510          *
 511          * This function assembles the base URL from multiple parts:
 512          * - Protocol is determined either by the request or a combination of
 513          * system.ssl_policy and the $ssl parameter.
 514          * - Host name is determined either by system.hostname or inferred from request
 515          * - Path is inferred from SCRIPT_NAME
 516          *
 517          * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
 518          *
 519          * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
 520          * @return string Friendica server base URL
 521          * @throws InternalServerErrorException
 522          */
 523         public function getBaseURL($ssl = false)
 524         {
 525                 $scheme = $this->scheme;
 526
 527                 if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
 528                         $scheme = 'https';
 529                 }
 530
 531                 //      Basically, we have $ssl = true on any links which can only be seen by a logged in user
 532                 //      (and also the login link). Anything seen by an outsider will have it turned off.
 533
 534                 if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
 535                         if ($ssl) {
 536                                 $scheme = 'https';
 537                         } else {
 538                                 $scheme = 'http';
 539                         }
 540                 }
 541
 542                 if (Core\Config::get('config', 'hostname') != '') {
 543                         $this->hostname = Core\Config::get('config', 'hostname');
 544                 }
 545
 546                 return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
 547         }
 548
 549         /**
 550          * @brief Initializes the baseurl components
 551          *
 552          * Clears the baseurl cache to prevent inconsistencies
 553          *
 554          * @param string $url
 555          * @throws InternalServerErrorException
 556          */
 557         public function setBaseURL($url)
 558         {
 559                 $parsed = @parse_url($url);
 560                 $hostname = '';
 561
 562                 if (!empty($parsed)) {
 563                         if (!empty($parsed['scheme'])) {
 564                                 $this->scheme = $parsed['scheme'];
 565                         }
 566
 567                         if (!empty($parsed['host'])) {
 568                                 $hostname = $parsed['host'];
 569                         }
 570
 571                         if (!empty($parsed['port'])) {
 572                                 $hostname .= ':' . $parsed['port'];
 573                         }
 574                         if (!empty($parsed['path'])) {
 575                                 $this->urlPath = trim($parsed['path'], '\\/');
 576                         }
 577
 578                         if (file_exists($this->basePath . '/.htpreconfig.php')) {
 579                                 include $this->basePath . '/.htpreconfig.php';
 580                         }
 581
 582                         if (Core\Config::get('config', 'hostname') != '') {
 583                                 $this->hostname = Core\Config::get('config', 'hostname');
 584                         }
 585
 586                         if (!isset($this->hostname) || ($this->hostname == '')) {
 587                                 $this->hostname = $hostname;
 588                         }
 589                 }
 590         }
 591
 592         public function getHostName()
 593         {
 594                 if (Core\Config::get('config', 'hostname') != '') {
 595                         $this->hostname = Core\Config::get('config', 'hostname');
 596                 }
 597
 598                 return $this->hostname;
 599         }
 600
 601         public function getURLPath()
 602         {
 603                 return $this->urlPath;
 604         }
 605
 606         /**
 607          * Initializes App->page['htmlhead'].
 608          *
 609          * Includes:
 610          * - Page title
 611          * - Favicons
 612          * - Registered stylesheets (through App->registerStylesheet())
 613          * - Infinite scroll data
 614          * - head.tpl template
 615          */
 616         public function initHead()
 617         {
 618                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 619
 620                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 621                 if ($interval < 0) {
 622                         $interval = 2147483647;
 623                 }
 624
 625                 if ($interval < 10000) {
 626                         $interval = 40000;
 627                 }
 628
 629                 // compose the page title from the sitename and the
 630                 // current module called
 631                 if (!$this->module == '') {
 632                         $this->page['title'] = $this->config->get('config', 'sitename') . ' (' . $this->module . ')';
 633                 } else {
 634                         $this->page['title'] = $this->config->get('config', 'sitename');
 635                 }
 636
 637                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 638                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 639                 } else {
 640                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 641                 }
 642
 643                 $this->registerStylesheet($stylesheet);
 644
 645                 $shortcut_icon = Core\Config::get('system', 'shortcut_icon');
 646                 if ($shortcut_icon == '') {
 647                         $shortcut_icon = 'images/friendica-32.png';
 648                 }
 649
 650                 $touch_icon = Core\Config::get('system', 'touch_icon');
 651                 if ($touch_icon == '') {
 652                         $touch_icon = 'images/friendica-128.png';
 653                 }
 654
 655                 Core\Hook::callAll('head', $this->page['htmlhead']);
 656
 657                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 658                 /* put the head template at the beginning of page['htmlhead']
 659                  * since the code added by the modules frequently depends on it
 660                  * being first
 661                  */
 662                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 663                         '$baseurl'         => $this->getBaseURL(),
 664                         '$local_user'      => local_user(),
 665                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 666                         '$delitem'         => Core\L10n::t('Delete this item?'),
 667                         '$showmore'        => Core\L10n::t('show more'),
 668                         '$showfewer'       => Core\L10n::t('show fewer'),
 669                         '$update_interval' => $interval,
 670                         '$shortcut_icon'   => $shortcut_icon,
 671                         '$touch_icon'      => $touch_icon,
 672                         '$block_public'    => intval(Core\Config::get('system', 'block_public')),
 673                         '$stylesheets'     => $this->stylesheets,
 674                 ]) . $this->page['htmlhead'];
 675         }
 676
 677         /**
 678          * Initializes App->page['footer'].
 679          *
 680          * Includes:
 681          * - Javascript homebase
 682          * - Mobile toggle link
 683          * - Registered footer scripts (through App->registerFooterScript())
 684          * - footer.tpl template
 685          */
 686         public function initFooter()
 687         {
 688                 // If you're just visiting, let javascript take you home
 689                 if (!empty($_SESSION['visitor_home'])) {
 690                         $homebase = $_SESSION['visitor_home'];
 691                 } elseif (local_user()) {
 692                         $homebase = 'profile/' . $this->user['nickname'];
 693                 }
 694
 695                 if (isset($homebase)) {
 696                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 697                 }
 698
 699                 /*
 700                  * Add a "toggle mobile" link if we're using a mobile device
 701                  */
 702                 if ($this->is_mobile || $this->is_tablet) {
 703                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 704                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 705                         } else {
 706                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 707                         }
 708                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 709                                 '$toggle_link' => $link,
 710                                 '$toggle_text' => Core\L10n::t('toggle mobile')
 711                         ]);
 712                 }
 713
 714                 Core\Hook::callAll('footer', $this->page['footer']);
 715
 716                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 717                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 718                         '$baseurl' => $this->getBaseURL(),
 719                         '$footerScripts' => $this->footerScripts,
 720                 ]) . $this->page['footer'];
 721         }
 722
 723         /**
 724          * @brief Removes the base url from an url. This avoids some mixed content problems.
 725          *
 726          * @param string $origURL
 727          *
 728          * @return string The cleaned url
 729          * @throws InternalServerErrorException
 730          */
 731         public function removeBaseURL($origURL)
 732         {
 733                 // Remove the hostname from the url if it is an internal link
 734                 $nurl = Util\Strings::normaliseLink($origURL);
 735                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 736                 $url = str_replace($base . '/', '', $nurl);
 737
 738                 // if it is an external link return the orignal value
 739                 if ($url == Util\Strings::normaliseLink($origURL)) {
 740                         return $origURL;
 741                 } else {
 742                         return $url;
 743                 }
 744         }
 745
 746         /**
 747          * Saves a timestamp for a value - f.e. a call
 748          * Necessary for profiling Friendica
 749          *
 750          * @param int $timestamp the Timestamp
 751          * @param string $value A value to profile
 752          */
 753         public function saveTimestamp($timestamp, $value)
 754         {
 755                 $profiler = $this->config->get('system', 'profiler');
 756
 757                 if (!isset($profiler) || !$profiler) {
 758                         return;
 759                 }
 760
 761                 $duration = (float) (microtime(true) - $timestamp);
 762
 763                 if (!isset($this->performance[$value])) {
 764                         // Prevent ugly E_NOTICE
 765                         $this->performance[$value] = 0;
 766                 }
 767
 768                 $this->performance[$value] += (float) $duration;
 769                 $this->performance['marktime'] += (float) $duration;
 770
 771                 $callstack = Core\System::callstack();
 772
 773                 if (!isset($this->callstack[$value][$callstack])) {
 774                         // Prevent ugly E_NOTICE
 775                         $this->callstack[$value][$callstack] = 0;
 776                 }
 777
 778                 $this->callstack[$value][$callstack] += (float) $duration;
 779         }
 780
 781         /**
 782          * Returns the current UserAgent as a String
 783          *
 784          * @return string the UserAgent as a String
 785          * @throws InternalServerErrorException
 786          */
 787         public function getUserAgent()
 788         {
 789                 return
 790                         FRIENDICA_PLATFORM . " '" .
 791                         FRIENDICA_CODENAME . "' " .
 792                         FRIENDICA_VERSION . '-' .
 793                         DB_UPDATE_VERSION . '; ' .
 794                         $this->getBaseURL();
 795         }
 796
 797         /**
 798          * Checks, if the call is from the Friendica App
 799          *
 800          * Reason:
 801          * The friendica client has problems with the GUID in the notify. this is some workaround
 802          */
 803         private function checkFriendicaApp()
 804         {
 805                 // Friendica-Client
 806                 $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
 807         }
 808
 809         /**
 810          *      Is the call via the Friendica app? (not a "normale" call)
 811          *
 812          * @return bool true if it's from the Friendica app
 813          */
 814         public function isFriendicaApp()
 815         {
 816                 return $this->isFriendicaApp;
 817         }
 818
 819         /**
 820          * @brief Checks if the site is called via a backend process
 821          *
 822          * This isn't a perfect solution. But we need this check very early.
 823          * So we cannot wait until the modules are loaded.
 824          *
 825          * @param string $backend true, if the backend flag was set during App initialization
 826          *
 827          */
 828         private function checkBackend($backend) {
 829                 static $backends = [
 830                         '_well_known',
 831                         'api',
 832                         'dfrn_notify',
 833                         'fetch',
 834                         'hcard',
 835                         'hostxrd',
 836                         'nodeinfo',
 837                         'noscrape',
 838                         'p',
 839                         'poco',
 840                         'post',
 841                         'proxy',
 842                         'pubsub',
 843                         'pubsubhubbub',
 844                         'receive',
 845                         'rsd_xml',
 846                         'salmon',
 847                         'statistics_json',
 848                         'xrd',
 849                 ];
 850
 851                 // Check if current module is in backend or backend flag is set
 852                 $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
 853         }
 854
 855         /**
 856          * Returns true, if the call is from a backend node (f.e. from a worker)
 857          *
 858          * @return bool Is it a known backend?
 859          */
 860         public function isBackend()
 861         {
 862                 return $this->isBackend;
 863         }
 864
 865         /**
 866          * @brief Checks if the maximum number of database processes is reached
 867          *
 868          * @return bool Is the limit reached?
 869          */
 870         public function isMaxProcessesReached()
 871         {
 872                 // Deactivated, needs more investigating if this check really makes sense
 873                 return false;
 874
 875                 /*
 876                  * Commented out to suppress static analyzer issues
 877                  *
 878                 if ($this->is_backend()) {
 879                         $process = 'backend';
 880                         $max_processes = Core\Config::get('system', 'max_processes_backend');
 881                         if (intval($max_processes) == 0) {
 882                                 $max_processes = 5;
 883                         }
 884                 } else {
 885                         $process = 'frontend';
 886                         $max_processes = Core\Config::get('system', 'max_processes_frontend');
 887                         if (intval($max_processes) == 0) {
 888                                 $max_processes = 20;
 889                         }
 890                 }
 891
 892                 $processlist = DBA::processlist();
 893                 if ($processlist['list'] != '') {
 894                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 895
 896                         if ($processlist['amount'] > $max_processes) {
 897                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 898                                 return true;
 899                         }
 900                 }
 901                 return false;
 902                  */
 903         }
 904
 905         /**
 906          * @brief Checks if the minimal memory is reached
 907          *
 908          * @return bool Is the memory limit reached?
 909          * @throws InternalServerErrorException
 910          */
 911         public function isMinMemoryReached()
 912         {
 913                 $min_memory = Core\Config::get('system', 'min_memory', 0);
 914                 if ($min_memory == 0) {
 915                         return false;
 916                 }
 917
 918                 if (!is_readable('/proc/meminfo')) {
 919                         return false;
 920                 }
 921
 922                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 923
 924                 $meminfo = [];
 925                 foreach ($memdata as $line) {
 926                         $data = explode(':', $line);
 927                         if (count($data) != 2) {
 928                                 continue;
 929                         }
 930                         list($key, $val) = $data;
 931                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 932                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 933                 }
 934
 935                 if (!isset($meminfo['MemFree'])) {
 936                         return false;
 937                 }
 938
 939                 $free = $meminfo['MemFree'];
 940
 941                 $reached = ($free < $min_memory);
 942
 943                 if ($reached) {
 944                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 945                 }
 946
 947                 return $reached;
 948         }
 949
 950         /**
 951          * @brief Checks if the maximum load is reached
 952          *
 953          * @return bool Is the load reached?
 954          * @throws InternalServerErrorException
 955          */
 956         public function isMaxLoadReached()
 957         {
 958                 if ($this->isBackend()) {
 959                         $process = 'backend';
 960                         $maxsysload = intval(Core\Config::get('system', 'maxloadavg'));
 961                         if ($maxsysload < 1) {
 962                                 $maxsysload = 50;
 963                         }
 964                 } else {
 965                         $process = 'frontend';
 966                         $maxsysload = intval(Core\Config::get('system', 'maxloadavg_frontend'));
 967                         if ($maxsysload < 1) {
 968                                 $maxsysload = 50;
 969                         }
 970                 }
 971
 972                 $load = Core\System::currentLoad();
 973                 if ($load) {
 974                         if (intval($load) > $maxsysload) {
 975                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 976                                 return true;
 977                         }
 978                 }
 979                 return false;
 980         }
 981
 982         /**
 983          * Executes a child process with 'proc_open'
 984          *
 985          * @param string $command The command to execute
 986          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 987          * @throws InternalServerErrorException
 988          */
 989         public function proc_run($command, $args)
 990         {
 991                 if (!function_exists('proc_open')) {
 992                         return;
 993                 }
 994
 995                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 996
 997                 foreach ($args as $key => $value) {
 998                         if (!is_null($value) && is_bool($value) && !$value) {
 999                                 continue;
1000                         }
1001
1002                         $cmdline .= ' --' . $key;
1003                         if (!is_null($value) && !is_bool($value)) {
1004                                 $cmdline .= ' ' . $value;
1005                         }
1006                 }
1007
1008                 if ($this->isMinMemoryReached()) {
1009                         return;
1010                 }
1011
1012                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
1013                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->basePath);
1014                 } else {
1015                         $resource = proc_open($cmdline . ' &', [], $foo, $this->basePath);
1016                 }
1017                 if (!is_resource($resource)) {
1018                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
1019                         return;
1020                 }
1021                 proc_close($resource);
1022         }
1023
1024         /**
1025          * Generates the site's default sender email address
1026          *
1027          * @return string
1028          * @throws InternalServerErrorException
1029          */
1030         public function getSenderEmailAddress()
1031         {
1032                 $sender_email = Core\Config::get('config', 'sender_email');
1033                 if (empty($sender_email)) {
1034                         $hostname = $this->getHostName();
1035                         if (strpos($hostname, ':')) {
1036                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
1037                         }
1038
1039                         $sender_email = 'noreply@' . $hostname;
1040                 }
1041
1042                 return $sender_email;
1043         }
1044
1045         /**
1046          * Returns the current theme name.
1047          *
1048          * @return string the name of the current theme
1049          * @throws InternalServerErrorException
1050          */
1051         public function getCurrentTheme()
1052         {
1053                 if ($this->getMode()->isInstall()) {
1054                         return '';
1055                 }
1056
1057                 if (!$this->currentTheme) {
1058                         $this->computeCurrentTheme();
1059                 }
1060
1061                 return $this->currentTheme;
1062         }
1063
1064         public function setCurrentTheme($theme)
1065         {
1066                 $this->currentTheme = $theme;
1067         }
1068
1069         /**
1070          * Computes the current theme name based on the node settings, the user settings and the device type
1071          *
1072          * @throws Exception
1073          */
1074         private function computeCurrentTheme()
1075         {
1076                 $system_theme = Core\Config::get('system', 'theme');
1077                 if (!$system_theme) {
1078                         throw new Exception(Core\L10n::t('No system theme config value set.'));
1079                 }
1080
1081                 // Sane default
1082                 $this->currentTheme = $system_theme;
1083
1084                 $allowed_themes = explode(',', Core\Config::get('system', 'allowed_themes', $system_theme));
1085
1086                 $page_theme = null;
1087                 // Find the theme that belongs to the user whose stuff we are looking at
1088                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
1089                         // Allow folks to override user themes and always use their own on their own site.
1090                         // This works only if the user is on the same server
1091                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
1092                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
1093                                 $page_theme = $user['theme'];
1094                         }
1095                 }
1096
1097                 $user_theme = Core\Session::get('theme', $system_theme);
1098
1099                 // Specific mobile theme override
1100                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
1101                         $system_mobile_theme = Core\Config::get('system', 'mobile-theme');
1102                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
1103
1104                         // --- means same mobile theme as desktop
1105                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
1106                                 $user_theme = $user_mobile_theme;
1107                         }
1108                 }
1109
1110                 if ($page_theme) {
1111                         $theme_name = $page_theme;
1112                 } else {
1113                         $theme_name = $user_theme;
1114                 }
1115
1116                 if ($theme_name
1117                         && in_array($theme_name, $allowed_themes)
1118                         && (file_exists('view/theme/' . $theme_name . '/style.css')
1119                         || file_exists('view/theme/' . $theme_name . '/style.php'))
1120                 ) {
1121                         $this->currentTheme = $theme_name;
1122                 }
1123         }
1124
1125         /**
1126          * @brief Return full URL to theme which is currently in effect.
1127          *
1128          * Provide a sane default if nothing is chosen or the specified theme does not exist.
1129          *
1130          * @return string
1131          * @throws InternalServerErrorException
1132          */
1133         public function getCurrentThemeStylesheetPath()
1134         {
1135                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
1136         }
1137
1138         /**
1139          * Check if request was an AJAX (xmlhttprequest) request.
1140          *
1141          * @return boolean true if it was an AJAX request
1142          */
1143         public function isAjax()
1144         {
1145                 return $this->isAjax;
1146         }
1147
1148         /**
1149          * Returns the value of a argv key
1150          * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
1151          *
1152          * @param int $position the position of the argument
1153          * @param mixed $default the default value if not found
1154          *
1155          * @return mixed returns the value of the argument
1156          */
1157         public function getArgumentValue($position, $default = '')
1158         {
1159                 if (array_key_exists($position, $this->argv)) {
1160                         return $this->argv[$position];
1161                 }
1162
1163                 return $default;
1164         }
1165
1166         /**
1167          * Sets the base url for use in cmdline programs which don't have
1168          * $_SERVER variables
1169          */
1170         public function checkURL()
1171         {
1172                 $url = Core\Config::get('system', 'url');
1173
1174                 // if the url isn't set or the stored url is radically different
1175                 // than the currently visited url, store the current value accordingly.
1176                 // "Radically different" ignores common variations such as http vs https
1177                 // and www.example.com vs example.com.
1178                 // We will only change the url to an ip address if there is no existing setting
1179
1180                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->getHostName()))) {
1181                         Core\Config::set('system', 'url', $this->getBaseURL());
1182                 }
1183         }
1184
1185         /**
1186          * Frontend App script
1187          *
1188          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
1189          * request and a representation of the response.
1190          *
1191          * This probably should change to limit the size of this monster method.
1192          */
1193         public function runFrontend()
1194         {
1195                 // Missing DB connection: ERROR
1196                 if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
1197                         Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
1198                 }
1199
1200                 // Max Load Average reached: ERROR
1201                 if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
1202                         header('Retry-After: 120');
1203                         header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
1204
1205                         Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
1206                 }
1207
1208                 if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
1209                         Core\System::httpExit(404);
1210                 }
1211
1212                 if (!$this->getMode()->isInstall()) {
1213                         // Force SSL redirection
1214                         if (Core\Config::get('system', 'force_ssl') && ($this->getScheme() == "http")
1215                                 && intval(Core\Config::get('system', 'ssl_policy')) == SSL_POLICY_FULL
1216                                 && strpos($this->getBaseURL(), 'https://') === 0
1217                                 && $_SERVER['REQUEST_METHOD'] == 'GET') {
1218                                 header('HTTP/1.1 302 Moved Temporarily');
1219                                 header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
1220                                 exit();
1221                         }
1222
1223                         Core\Session::init();
1224                         Core\Hook::callAll('init_1');
1225                 }
1226
1227                 // Exclude the backend processes from the session management
1228                 if (!$this->isBackend()) {
1229                         $stamp1 = microtime(true);
1230                         session_start();
1231                         $this->saveTimestamp($stamp1, 'parser');
1232                         Core\L10n::setSessionVariable();
1233                         Core\L10n::setLangFromSession();
1234                 } else {
1235                         $_SESSION = [];
1236                         Core\Worker::executeIfIdle();
1237                 }
1238
1239                 // ZRL
1240                 if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
1241                         $this->query_string = Model\Profile::stripZrls($this->query_string);
1242                         if (!local_user()) {
1243                                 // Only continue when the given profile link seems valid
1244                                 // Valid profile links contain a path with "/profile/" and no query parameters
1245                                 if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
1246                                         strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
1247                                         if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
1248                                                 $_SESSION['my_url'] = $_GET['zrl'];
1249                                                 $_SESSION['authenticated'] = 0;
1250                                         }
1251                                         Model\Profile::zrlInit($this);
1252                                 } else {
1253                                         // Someone came with an invalid parameter, maybe as a DDoS attempt
1254                                         // We simply stop processing here
1255                                         Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
1256                                         Core\System::httpExit(403, ['title' => '403 Forbidden']);
1257                                 }
1258                         }
1259                 }
1260
1261                 if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
1262                         $token = $_GET['owt'];
1263                         $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
1264                         Model\Profile::openWebAuthInit($token);
1265                 }
1266
1267                 Module\Login::sessionAuth();
1268
1269                 if (empty($_SESSION['authenticated'])) {
1270                         header('X-Account-Management-Status: none');
1271                 }
1272
1273                 $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
1274                 $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
1275                 $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
1276
1277                 /*
1278                  * check_config() is responsible for running update scripts. These automatically
1279                  * update the DB schema whenever we push a new one out. It also checks to see if
1280                  * any addons have been added or removed and reacts accordingly.
1281                  */
1282
1283                 // in install mode, any url loads install module
1284                 // but we need "view" module for stylesheet
1285                 if ($this->getMode()->isInstall() && $this->module != 'view') {
1286                         $this->module = 'install';
1287                 } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
1288                         $this->module = 'maintenance';
1289                 } else {
1290                         $this->checkURL();
1291                         Core\Update::check($this->basePath, false);
1292                         Core\Addon::loadAddons();
1293                         Core\Hook::loadHooks();
1294                 }
1295
1296                 $this->page = [
1297                         'aside' => '',
1298                         'bottom' => '',
1299                         'content' => '',
1300                         'footer' => '',
1301                         'htmlhead' => '',
1302                         'nav' => '',
1303                         'page_title' => '',
1304                         'right_aside' => '',
1305                         'template' => '',
1306                         'title' => ''
1307                 ];
1308
1309                 if (strlen($this->module)) {
1310                         // Compatibility with the Android Diaspora client
1311                         if ($this->module == 'stream') {
1312                                 $this->internalRedirect('network?f=&order=post');
1313                         }
1314
1315                         if ($this->module == 'conversations') {
1316                                 $this->internalRedirect('message');
1317                         }
1318
1319                         if ($this->module == 'commented') {
1320                                 $this->internalRedirect('network?f=&order=comment');
1321                         }
1322
1323                         if ($this->module == 'liked') {
1324                                 $this->internalRedirect('network?f=&order=comment');
1325                         }
1326
1327                         if ($this->module == 'activity') {
1328                                 $this->internalRedirect('network/?f=&conv=1');
1329                         }
1330
1331                         if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
1332                                 $this->internalRedirect('bookmarklet');
1333                         }
1334
1335                         if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
1336                                 $this->internalRedirect('settings');
1337                         }
1338
1339                         if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
1340                                 $this->internalRedirect('search');
1341                         }
1342
1343                         // Compatibility with the Firefox App
1344                         if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
1345                                 $this->module = "login";
1346                         }
1347
1348                         $privateapps = Core\Config::get('config', 'private_addons', false);
1349                         if (Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1350                                 //Check if module is an app and if public access to apps is allowed or not
1351                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1352                                         info(Core\L10n::t("You must be logged in to use addons. "));
1353                                 } else {
1354                                         include_once "addon/{$this->module}/{$this->module}.php";
1355                                         if (function_exists($this->module . '_module')) {
1356                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1357                                                 $this->module_class = 'Friendica\\LegacyModule';
1358                                                 $this->module_loaded = true;
1359                                         }
1360                                 }
1361                         }
1362
1363                         // Controller class routing
1364                         if (! $this->module_loaded && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
1365                                 $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
1366                                 $this->module_loaded = true;
1367                         }
1368
1369                         /* If not, next look for a 'standard' program module in the 'mod' directory
1370                          * We emulate a Module class through the LegacyModule class
1371                          */
1372                         if (! $this->module_loaded && file_exists("mod/{$this->module}.php")) {
1373                                 LegacyModule::setModuleFile("mod/{$this->module}.php");
1374                                 $this->module_class = 'Friendica\\LegacyModule';
1375                                 $this->module_loaded = true;
1376                         }
1377
1378                         /* The URL provided does not resolve to a valid module.
1379                          *
1380                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1381                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1382                          * 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
1383                          * this will often succeed and eventually do the right thing.
1384                          *
1385                          * Otherwise we are going to emit a 404 not found.
1386                          */
1387                         if (! $this->module_loaded) {
1388                                 // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
1389                                 if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
1390                                         exit();
1391                                 }
1392
1393                                 if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
1394                                         Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
1395                                         $this->internalRedirect($_SERVER['REQUEST_URI']);
1396                                 }
1397
1398                                 Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1399
1400                                 header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
1401                                 $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
1402                                 $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
1403                                         '$message' =>  Core\L10n::t('Page not found.')
1404                                 ]);
1405                         }
1406                 }
1407
1408                 $content = '';
1409
1410                 // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1411                 if ($this->module_loaded) {
1412                         $this->page['page_title'] = $this->module;
1413                         $placeholder = '';
1414
1415                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1416
1417                         call_user_func([$this->module_class, 'init']);
1418
1419                         // "rawContent" is especially meant for technical endpoints.
1420                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1421                         if (!$this->error) {
1422                                 call_user_func([$this->module_class, 'rawContent']);
1423                         }
1424                 }
1425
1426                 // Load current theme info after module has been initialized as theme could have been set in module
1427                 $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1428                 if (file_exists($theme_info_file)) {
1429                         require_once $theme_info_file;
1430                 }
1431
1432                 if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1433                         $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1434                         $func($this);
1435                 }
1436
1437                 if ($this->module_loaded) {
1438                         if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
1439                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1440                                 call_user_func([$this->module_class, 'post']);
1441                         }
1442
1443                         if (! $this->error) {
1444                                 Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1445                                 call_user_func([$this->module_class, 'afterpost']);
1446                         }
1447
1448                         if (! $this->error) {
1449                                 $arr = ['content' => $content];
1450                                 Core\Hook::callAll($this->module . '_mod_content', $arr);
1451                                 $content = $arr['content'];
1452                                 $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1453                                 Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1454                                 $content .= $arr['content'];
1455                         }
1456                 }
1457
1458                 // initialise content region
1459                 if ($this->getMode()->isNormal()) {
1460                         Core\Hook::callAll('page_content_top', $this->page['content']);
1461                 }
1462
1463                 $this->page['content'] .= $content;
1464
1465                 /* Create the page head after setting the language
1466                  * and getting any auth credentials.
1467                  *
1468                  * Moved initHead() and initFooter() to after
1469                  * all the module functions have executed so that all
1470                  * theme choices made by the modules can take effect.
1471                  */
1472                 $this->initHead();
1473
1474                 /* Build the page ending -- this is stuff that goes right before
1475                  * the closing </body> tag
1476                  */
1477                 $this->initFooter();
1478
1479                 /* now that we've been through the module content, see if the page reported
1480                  * a permission problem and if so, a 403 response would seem to be in order.
1481                  */
1482                 if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
1483                         header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
1484                 }
1485
1486                 // Report anything which needs to be communicated in the notification area (before the main body)
1487                 Core\Hook::callAll('page_end', $this->page['content']);
1488
1489                 // Add the navigation (menu) template
1490                 if ($this->module != 'install' && $this->module != 'maintenance') {
1491                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1492                         $this->page['nav']       = Content\Nav::build($this);
1493                 }
1494
1495                 // Build the page - now that we have all the components
1496                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1497                         $doc = new DOMDocument();
1498
1499                         $target = new DOMDocument();
1500                         $target->loadXML("<root></root>");
1501
1502                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1503
1504                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1505                         @$doc->loadHTML($content);
1506
1507                         $xpath = new DOMXPath($doc);
1508
1509                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1510
1511                         foreach ($list as $item) {
1512                                 $item = $target->importNode($item, true);
1513
1514                                 // And then append it to the target
1515                                 $target->documentElement->appendChild($item);
1516                         }
1517
1518                         if ($_GET["mode"] == "raw") {
1519                                 header("Content-type: text/html; charset=utf-8");
1520
1521                                 echo substr($target->saveHTML(), 6, -8);
1522
1523                                 exit();
1524                         }
1525                 }
1526
1527                 $page    = $this->page;
1528                 $profile = $this->profile;
1529
1530                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1531                 header("Content-type: text/html; charset=utf-8");
1532
1533                 if (Core\Config::get('system', 'hsts') && (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
1534                         header("Strict-Transport-Security: max-age=31536000");
1535                 }
1536
1537                 // Some security stuff
1538                 header('X-Content-Type-Options: nosniff');
1539                 header('X-XSS-Protection: 1; mode=block');
1540                 header('X-Permitted-Cross-Domain-Policies: none');
1541                 header('X-Frame-Options: sameorigin');
1542
1543                 // Things like embedded OSM maps don't work, when this is enabled
1544                 // 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'");
1545
1546                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1547                  * to load another page template than the default one.
1548                  * The page templates are located in /view/php/ or in the theme directory.
1549                  */
1550                 if (isset($_GET["mode"])) {
1551                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1552                 }
1553
1554                 // If there is no page template use the default page template
1555                 if (empty($template)) {
1556                         $template = Core\Theme::getPathForFile("default.php");
1557                 }
1558
1559                 // Theme templates expect $a as an App instance
1560                 $a = $this;
1561
1562                 // Used as is in view/php/default.php
1563                 $lang = Core\L10n::getCurrentLang();
1564
1565                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1566                 require_once $template;
1567         }
1568
1569         /**
1570          * Redirects to another module relative to the current Friendica base.
1571          * If you want to redirect to a external URL, use System::externalRedirectTo()
1572          *
1573          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1574          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1575          *
1576          * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
1577          */
1578         public function internalRedirect($toUrl = '', $ssl = false)
1579         {
1580                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1581                         throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1582                 }
1583
1584                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1585                 Core\System::externalRedirect($redirectTo);
1586         }
1587
1588         /**
1589          * Automatically redirects to relative or absolute URL
1590          * Should only be used if it isn't clear if the URL is either internal or external
1591          *
1592          * @param string $toUrl The target URL
1593          * @throws InternalServerErrorException
1594          */
1595         public function redirect($toUrl)
1596         {
1597                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1598                         Core\System::externalRedirect($toUrl);
1599                 } else {
1600                         $this->internalRedirect($toUrl);
1601                 }
1602         }
1603 }