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