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\Cache\ConfigCache;
  12 use Friendica\Core\Config\Configuration;
  13 use Friendica\Core\Hook;
  14 use Friendica\Core\L10n\L10n;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Theme;
  17 use Friendica\Database\Database;
  18 use Friendica\Database\DBA;
  19 use Friendica\Model\Profile;
  20 use Friendica\Module\Login;
  21 use Friendica\Network\HTTPException;
  22 use Friendica\Util\BaseURL;
  23 use Friendica\Util\ConfigFileLoader;
  24 use Friendica\Util\HTTPSignature;
  25 use Friendica\Util\Profiler;
  26 use Friendica\Util\Strings;
  27 use Psr\Log\LoggerInterface;
  28
  29 /**
  30  *
  31  * class: App
  32  *
  33  * @brief Our main application structure for the life of this page.
  34  *
  35  * Primarily deals with the URL that got us here
  36  * and tries to make some sense of it, and
  37  * stores our page contents and config storage
  38  * and anything else that might need to be passed around
  39  * before we spit the page out.
  40  *
  41  */
  42 class App
  43 {
  44         public $module_class = null;
  45         public $query_string = '';
  46         public $page = [];
  47         public $profile;
  48         public $profile_uid;
  49         public $user;
  50         public $cid;
  51         public $contact;
  52         public $contacts;
  53         public $page_contact;
  54         public $content;
  55         public $data = [];
  56         public $cmd = '';
  57         public $argv;
  58         public $argc;
  59         public $module;
  60         public $timezone;
  61         public $interactive = true;
  62         public $identities;
  63         public $is_mobile = false;
  64         public $is_tablet = false;
  65         public $theme_info = [];
  66         public $category;
  67         // Allow themes to control internal parameters
  68         // by changing App values in theme.php
  69
  70         public $sourcename = '';
  71         public $videowidth = 425;
  72         public $videoheight = 350;
  73         public $force_max_items = 0;
  74         public $theme_events_in_profile = true;
  75
  76         public $stylesheets = [];
  77         public $footerScripts = [];
  78
  79         /**
  80          * @var App\Mode The Mode of the Application
  81          */
  82         private $mode;
  83
  84         /**
  85          * @var App\Router
  86          */
  87         private $router;
  88
  89         /**
  90          * @var BaseURL
  91          */
  92         private $baseURL;
  93
  94         /**
  95          * @var bool true, if the call is from an backend node (f.e. worker)
  96          */
  97         private $isBackend;
  98
  99         /**
 100          * @var string The name of the current theme
 101          */
 102         private $currentTheme;
 103
 104         /**
 105          * @var bool check if request was an AJAX (xmlhttprequest) request
 106          */
 107         private $isAjax;
 108
 109         /**
 110          * @var MobileDetect
 111          */
 112         public $mobileDetect;
 113
 114         /**
 115          * @var Configuration The config
 116          */
 117         private $config;
 118
 119         /**
 120          * @var LoggerInterface The logger
 121          */
 122         private $logger;
 123
 124         /**
 125          * @var Profiler The profiler of this app
 126          */
 127         private $profiler;
 128
 129         /**
 130          * @var Database The Friendica database connection
 131          */
 132         private $database;
 133
 134         /**
 135          * @var L10n The translator
 136          */
 137         private $l10n;
 138
 139         /**
 140          * Returns the current config cache of this node
 141          *
 142          * @return ConfigCache
 143          */
 144         public function getConfigCache()
 145         {
 146                 return $this->config->getCache();
 147         }
 148
 149         /**
 150          * Returns the current config of this node
 151          *
 152          * @return Configuration
 153          */
 154         public function getConfig()
 155         {
 156                 return $this->config;
 157         }
 158
 159         /**
 160          * The basepath of this app
 161          *
 162          * @return string
 163          */
 164         public function getBasePath()
 165         {
 166                 // Don't use the basepath of the config table for basepath (it should always be the config-file one)
 167                 return $this->config->getCache()->get('system', 'basepath');
 168         }
 169
 170         /**
 171          * The Logger of this app
 172          *
 173          * @return LoggerInterface
 174          */
 175         public function getLogger()
 176         {
 177                 return $this->logger;
 178         }
 179
 180         /**
 181          * The profiler of this app
 182          *
 183          * @return Profiler
 184          */
 185         public function getProfiler()
 186         {
 187                 return $this->profiler;
 188         }
 189
 190         /**
 191          * Returns the Mode of the Application
 192          *
 193          * @return App\Mode The Application Mode
 194          */
 195         public function getMode()
 196         {
 197                 return $this->mode;
 198         }
 199
 200         /**
 201          * Returns the router of the Application
 202          *
 203          * @return App\Router
 204          */
 205         public function getRouter()
 206         {
 207                 return $this->router;
 208         }
 209
 210         /**
 211          * @return Database
 212          */
 213         public function getDatabase()
 214         {
 215                 return $this->database;
 216         }
 217
 218         /**
 219          * @return L10n
 220          */
 221         public function getL10n()
 222         {
 223                 return $this->l10n;
 224         }
 225
 226         /**
 227          * Register a stylesheet file path to be included in the <head> tag of every page.
 228          * Inclusion is done in App->initHead().
 229          * The path can be absolute or relative to the Friendica installation base folder.
 230          *
 231          * @see initHead()
 232          *
 233          * @param string $path
 234          */
 235         public function registerStylesheet($path)
 236         {
 237                 if (mb_strpos($path, $this->getBasePath() . DIRECTORY_SEPARATOR) === 0) {
 238                         $path = mb_substr($path, mb_strlen($this->getBasePath() . DIRECTORY_SEPARATOR));
 239                 }
 240
 241                 $this->stylesheets[] = trim($path, '/');
 242         }
 243
 244         /**
 245          * Register a javascript file path to be included in the <footer> tag of every page.
 246          * Inclusion is done in App->initFooter().
 247          * The path can be absolute or relative to the Friendica installation base folder.
 248          *
 249          * @see initFooter()
 250          *
 251          * @param string $path
 252          */
 253         public function registerFooterScript($path)
 254         {
 255                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 256
 257                 $this->footerScripts[] = trim($url, '/');
 258         }
 259
 260         public $queue;
 261
 262         /**
 263          * @brief App constructor.
 264          *
 265          * @param Database $database The Friendica Database
 266          * @param Configuration    $config    The Configuration
 267          * @param App\Mode         $mode      The mode of this Friendica app
 268          * @param App\Router       $router    The router of this Friendica app
 269          * @param BaseURL          $baseURL   The full base URL of this Friendica app
 270          * @param LoggerInterface  $logger    The current app logger
 271          * @param Profiler         $profiler  The profiler of this application
 272          * @param L10n             $l10n      The translator instance
 273          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 274          *
 275          * @throws Exception if the Basepath is not usable
 276          */
 277         public function __construct(Database $database, Configuration $config, App\Mode $mode, App\Router $router, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, L10n $l10n, $isBackend = true)
 278         {
 279                 BaseObject::setApp($this);
 280
 281                 $this->database = $database;
 282                 $this->config   = $config;
 283                 $this->mode     = $mode;
 284                 $this->router   = $router;
 285                 $this->baseURL  = $baseURL;
 286                 $this->profiler = $profiler;
 287                 $this->logger   = $logger;
 288                 $this->l10n     = $l10n;
 289
 290                 $this->profiler->reset();
 291
 292                 $this->reload();
 293
 294                 set_time_limit(0);
 295
 296                 // This has to be quite large to deal with embedded private photos
 297                 ini_set('pcre.backtrack_limit', 500000);
 298
 299                 set_include_path(
 300                         get_include_path() . PATH_SEPARATOR
 301                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 302                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 303                         . $this->getBasePath());
 304
 305                 if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
 306                         $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
 307                 } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
 308                         $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
 309                 }
 310
 311                 // removing trailing / - maybe a nginx problem
 312                 $this->query_string = ltrim($this->query_string, '/');
 313
 314                 if (!empty($_GET['pagename'])) {
 315                         $this->cmd = trim($_GET['pagename'], '/\\');
 316                 } elseif (!empty($_GET['q'])) {
 317                         $this->cmd = trim($_GET['q'], '/\\');
 318                 }
 319
 320                 // fix query_string
 321                 $this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
 322
 323                 // unix style "homedir"
 324                 if (substr($this->cmd, 0, 1) === '~') {
 325                         $this->cmd = 'profile/' . substr($this->cmd, 1);
 326                 }
 327
 328                 // Diaspora style profile url
 329                 if (substr($this->cmd, 0, 2) === 'u/') {
 330                         $this->cmd = 'profile/' . substr($this->cmd, 2);
 331                 }
 332
 333                 /*
 334                  * Break the URL path into C style argc/argv style arguments for our
 335                  * modules. Given "http://example.com/module/arg1/arg2", $this->argc
 336                  * will be 3 (integer) and $this->argv will contain:
 337                  *   [0] => 'module'
 338                  *   [1] => 'arg1'
 339                  *   [2] => 'arg2'
 340                  *
 341                  *
 342                  * There will always be one argument. If provided a naked domain
 343                  * URL, $this->argv[0] is set to "home".
 344                  */
 345
 346                 $this->argv = explode('/', $this->cmd);
 347                 $this->argc = count($this->argv);
 348                 if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
 349                         $this->module = str_replace('.', '_', $this->argv[0]);
 350                         $this->module = str_replace('-', '_', $this->module);
 351                 } else {
 352                         $this->argc = 1;
 353                         $this->argv = ['home'];
 354                         $this->module = 'home';
 355                 }
 356
 357                 $this->isBackend = $isBackend || $this->checkBackend($this->module);
 358
 359                 // Detect mobile devices
 360                 $mobile_detect = new MobileDetect();
 361
 362                 $this->mobileDetect = $mobile_detect;
 363
 364                 $this->is_mobile = $mobile_detect->isMobile();
 365                 $this->is_tablet = $mobile_detect->isTablet();
 366
 367                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 368
 369                 // Register template engines
 370                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 371         }
 372
 373         /**
 374          * Reloads the whole app instance
 375          */
 376         public function reload()
 377         {
 378                 $this->getMode()->determine($this->getBasePath());
 379
 380                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 381                         $this->profiler->update($this->config);
 382
 383                         Core\Hook::loadHooks();
 384                         $loader = new ConfigFileLoader($this->getBasePath());
 385                         Core\Hook::callAll('load_config', $loader);
 386                 }
 387
 388                 $this->loadDefaultTimezone();
 389         }
 390
 391         /**
 392          * Loads the default timezone
 393          *
 394          * Include support for legacy $default_timezone
 395          *
 396          * @global string $default_timezone
 397          */
 398         private function loadDefaultTimezone()
 399         {
 400                 if ($this->config->get('system', 'default_timezone')) {
 401                         $this->timezone = $this->config->get('system', 'default_timezone');
 402                 } else {
 403                         global $default_timezone;
 404                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 405                 }
 406
 407                 if ($this->timezone) {
 408                         date_default_timezone_set($this->timezone);
 409                 }
 410         }
 411
 412         /**
 413          * Returns the scheme of the current call
 414          * @return string
 415          *
 416          * @deprecated 2019.06 - use BaseURL->getScheme() instead
 417          */
 418         public function getScheme()
 419         {
 420                 return $this->baseURL->getScheme();
 421         }
 422
 423         /**
 424          * Retrieves the Friendica instance base URL
 425          *
 426          * @param bool $ssl Whether to append http or https under BaseURL::SSL_POLICY_SELFSIGN
 427          *
 428          * @return string Friendica server base URL
 429          */
 430         public function getBaseURL($ssl = false)
 431         {
 432                 return $this->baseURL->get($ssl);
 433         }
 434
 435         /**
 436          * @brief Initializes the baseurl components
 437          *
 438          * Clears the baseurl cache to prevent inconsistencies
 439          *
 440          * @param string $url
 441          *
 442          * @deprecated 2019.06 - use BaseURL->saveByURL($url) instead
 443          */
 444         public function setBaseURL($url)
 445         {
 446                 $this->baseURL->saveByURL($url);
 447         }
 448
 449         /**
 450          * Returns the current hostname
 451          *
 452          * @return string
 453          *
 454          * @deprecated 2019.06 - use BaseURL->getHostname() instead
 455          */
 456         public function getHostName()
 457         {
 458                 return $this->baseURL->getHostname();
 459         }
 460
 461         /**
 462          * Returns the sub-path of the full URL
 463          *
 464          * @return string
 465          *
 466          * @deprecated 2019.06 - use BaseURL->getUrlPath() instead
 467          */
 468         public function getURLPath()
 469         {
 470                 return $this->baseURL->getUrlPath();
 471         }
 472
 473         /**
 474          * Initializes App->page['htmlhead'].
 475          *
 476          * Includes:
 477          * - Page title
 478          * - Favicons
 479          * - Registered stylesheets (through App->registerStylesheet())
 480          * - Infinite scroll data
 481          * - head.tpl template
 482          */
 483         public function initHead()
 484         {
 485                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 486
 487                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 488                 if ($interval < 0) {
 489                         $interval = 2147483647;
 490                 }
 491
 492                 if ($interval < 10000) {
 493                         $interval = 40000;
 494                 }
 495
 496                 // Default title: current module called
 497                 if (empty($this->page['title']) && $this->module) {
 498                         $this->page['title'] = ucfirst($this->module);
 499                 }
 500
 501                 // Prepend the sitename to the page title
 502                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 503
 504                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 505                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 506                 } else {
 507                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 508                 }
 509
 510                 $this->registerStylesheet($stylesheet);
 511
 512                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 513                 if ($shortcut_icon == '') {
 514                         $shortcut_icon = 'images/friendica-32.png';
 515                 }
 516
 517                 $touch_icon = $this->config->get('system', 'touch_icon');
 518                 if ($touch_icon == '') {
 519                         $touch_icon = 'images/friendica-128.png';
 520                 }
 521
 522                 Core\Hook::callAll('head', $this->page['htmlhead']);
 523
 524                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 525                 /* put the head template at the beginning of page['htmlhead']
 526                  * since the code added by the modules frequently depends on it
 527                  * being first
 528                  */
 529                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 530                         '$local_user'      => local_user(),
 531                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 532                         '$delitem'         => $this->l10n->t('Delete this item?'),
 533                         '$update_interval' => $interval,
 534                         '$shortcut_icon'   => $shortcut_icon,
 535                         '$touch_icon'      => $touch_icon,
 536                         '$block_public'    => intval($this->config->get('system', 'block_public')),
 537                         '$stylesheets'     => $this->stylesheets,
 538                 ]) . $this->page['htmlhead'];
 539         }
 540
 541         /**
 542          * Initializes App->page['footer'].
 543          *
 544          * Includes:
 545          * - Javascript homebase
 546          * - Mobile toggle link
 547          * - Registered footer scripts (through App->registerFooterScript())
 548          * - footer.tpl template
 549          */
 550         public function initFooter()
 551         {
 552                 // If you're just visiting, let javascript take you home
 553                 if (!empty($_SESSION['visitor_home'])) {
 554                         $homebase = $_SESSION['visitor_home'];
 555                 } elseif (local_user()) {
 556                         $homebase = 'profile/' . $this->user['nickname'];
 557                 }
 558
 559                 if (isset($homebase)) {
 560                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 561                 }
 562
 563                 /*
 564                  * Add a "toggle mobile" link if we're using a mobile device
 565                  */
 566                 if ($this->is_mobile || $this->is_tablet) {
 567                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 568                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 569                         } else {
 570                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 571                         }
 572                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 573                                 '$toggle_link' => $link,
 574                                 '$toggle_text' => $this->l10n->t('toggle mobile')
 575                         ]);
 576                 }
 577
 578                 Core\Hook::callAll('footer', $this->page['footer']);
 579
 580                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 581                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 582                         '$footerScripts' => $this->footerScripts,
 583                 ]) . $this->page['footer'];
 584         }
 585
 586         /**
 587          * @brief Removes the base url from an url. This avoids some mixed content problems.
 588          *
 589          * @param string $origURL
 590          *
 591          * @return string The cleaned url
 592          * @throws HTTPException\InternalServerErrorException
 593          */
 594         public function removeBaseURL($origURL)
 595         {
 596                 // Remove the hostname from the url if it is an internal link
 597                 $nurl = Util\Strings::normaliseLink($origURL);
 598                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 599                 $url = str_replace($base . '/', '', $nurl);
 600
 601                 // if it is an external link return the orignal value
 602                 if ($url == Util\Strings::normaliseLink($origURL)) {
 603                         return $origURL;
 604                 } else {
 605                         return $url;
 606                 }
 607         }
 608
 609         /**
 610          * Returns the current UserAgent as a String
 611          *
 612          * @return string the UserAgent as a String
 613          * @throws HTTPException\InternalServerErrorException
 614          */
 615         public function getUserAgent()
 616         {
 617                 return
 618                         FRIENDICA_PLATFORM . " '" .
 619                         FRIENDICA_CODENAME . "' " .
 620                         FRIENDICA_VERSION . '-' .
 621                         DB_UPDATE_VERSION . '; ' .
 622                         $this->getBaseURL();
 623         }
 624
 625         /**
 626          * @brief Checks if the site is called via a backend process
 627          *
 628          * This isn't a perfect solution. But we need this check very early.
 629          * So we cannot wait until the modules are loaded.
 630          *
 631          * @param string $module
 632          * @return bool
 633          */
 634         private function checkBackend($module) {
 635                 static $backends = [
 636                         '_well_known',
 637                         'api',
 638                         'dfrn_notify',
 639                         'feed',
 640                         'fetch',
 641                         'followers',
 642                         'following',
 643                         'hcard',
 644                         'hostxrd',
 645                         'inbox',
 646                         'manifest',
 647                         'nodeinfo',
 648                         'noscrape',
 649                         'objects',
 650                         'outbox',
 651                         'poco',
 652                         'post',
 653                         'proxy',
 654                         'pubsub',
 655                         'pubsubhubbub',
 656                         'receive',
 657                         'rsd_xml',
 658                         'salmon',
 659                         'statistics_json',
 660                         'xrd',
 661                 ];
 662
 663                 // Check if current module is in backend or backend flag is set
 664                 return in_array($module, $backends);
 665         }
 666
 667         /**
 668          * Returns true, if the call is from a backend node (f.e. from a worker)
 669          *
 670          * @return bool Is it a known backend?
 671          */
 672         public function isBackend()
 673         {
 674                 return $this->isBackend;
 675         }
 676
 677         /**
 678          * @brief Checks if the maximum number of database processes is reached
 679          *
 680          * @return bool Is the limit reached?
 681          */
 682         public function isMaxProcessesReached()
 683         {
 684                 // Deactivated, needs more investigating if this check really makes sense
 685                 return false;
 686
 687                 /*
 688                  * Commented out to suppress static analyzer issues
 689                  *
 690                 if ($this->is_backend()) {
 691                         $process = 'backend';
 692                         $max_processes = $this->config->get('system', 'max_processes_backend');
 693                         if (intval($max_processes) == 0) {
 694                                 $max_processes = 5;
 695                         }
 696                 } else {
 697                         $process = 'frontend';
 698                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 699                         if (intval($max_processes) == 0) {
 700                                 $max_processes = 20;
 701                         }
 702                 }
 703
 704                 $processlist = DBA::processlist();
 705                 if ($processlist['list'] != '') {
 706                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 707
 708                         if ($processlist['amount'] > $max_processes) {
 709                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 710                                 return true;
 711                         }
 712                 }
 713                 return false;
 714                  */
 715         }
 716
 717         /**
 718          * @brief Checks if the minimal memory is reached
 719          *
 720          * @return bool Is the memory limit reached?
 721          * @throws HTTPException\InternalServerErrorException
 722          */
 723         public function isMinMemoryReached()
 724         {
 725                 $min_memory = $this->config->get('system', 'min_memory', 0);
 726                 if ($min_memory == 0) {
 727                         return false;
 728                 }
 729
 730                 if (!is_readable('/proc/meminfo')) {
 731                         return false;
 732                 }
 733
 734                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 735
 736                 $meminfo = [];
 737                 foreach ($memdata as $line) {
 738                         $data = explode(':', $line);
 739                         if (count($data) != 2) {
 740                                 continue;
 741                         }
 742                         list($key, $val) = $data;
 743                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 744                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 745                 }
 746
 747                 if (!isset($meminfo['MemFree'])) {
 748                         return false;
 749                 }
 750
 751                 $free = $meminfo['MemFree'];
 752
 753                 $reached = ($free < $min_memory);
 754
 755                 if ($reached) {
 756                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 757                 }
 758
 759                 return $reached;
 760         }
 761
 762         /**
 763          * @brief Checks if the maximum load is reached
 764          *
 765          * @return bool Is the load reached?
 766          * @throws HTTPException\InternalServerErrorException
 767          */
 768         public function isMaxLoadReached()
 769         {
 770                 if ($this->isBackend()) {
 771                         $process = 'backend';
 772                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 773                         if ($maxsysload < 1) {
 774                                 $maxsysload = 50;
 775                         }
 776                 } else {
 777                         $process = 'frontend';
 778                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 779                         if ($maxsysload < 1) {
 780                                 $maxsysload = 50;
 781                         }
 782                 }
 783
 784                 $load = Core\System::currentLoad();
 785                 if ($load) {
 786                         if (intval($load) > $maxsysload) {
 787                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 788                                 return true;
 789                         }
 790                 }
 791                 return false;
 792         }
 793
 794         /**
 795          * Executes a child process with 'proc_open'
 796          *
 797          * @param string $command The command to execute
 798          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 799          * @throws HTTPException\InternalServerErrorException
 800          */
 801         public function proc_run($command, $args)
 802         {
 803                 if (!function_exists('proc_open')) {
 804                         return;
 805                 }
 806
 807                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 808
 809                 foreach ($args as $key => $value) {
 810                         if (!is_null($value) && is_bool($value) && !$value) {
 811                                 continue;
 812                         }
 813
 814                         $cmdline .= ' --' . $key;
 815                         if (!is_null($value) && !is_bool($value)) {
 816                                 $cmdline .= ' ' . $value;
 817                         }
 818                 }
 819
 820                 if ($this->isMinMemoryReached()) {
 821                         return;
 822                 }
 823
 824                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 825                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 826                 } else {
 827                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 828                 }
 829                 if (!is_resource($resource)) {
 830                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 831                         return;
 832                 }
 833                 proc_close($resource);
 834         }
 835
 836         /**
 837          * Generates the site's default sender email address
 838          *
 839          * @return string
 840          * @throws HTTPException\InternalServerErrorException
 841          */
 842         public function getSenderEmailAddress()
 843         {
 844                 $sender_email = $this->config->get('config', 'sender_email');
 845                 if (empty($sender_email)) {
 846                         $hostname = $this->baseURL->getHostname();
 847                         if (strpos($hostname, ':')) {
 848                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 849                         }
 850
 851                         $sender_email = 'noreply@' . $hostname;
 852                 }
 853
 854                 return $sender_email;
 855         }
 856
 857         /**
 858          * Returns the current theme name.
 859          *
 860          * @return string the name of the current theme
 861          * @throws HTTPException\InternalServerErrorException
 862          */
 863         public function getCurrentTheme()
 864         {
 865                 if ($this->getMode()->isInstall()) {
 866                         return '';
 867                 }
 868
 869                 if (!$this->currentTheme) {
 870                         $this->computeCurrentTheme();
 871                 }
 872
 873                 return $this->currentTheme;
 874         }
 875
 876         public function setCurrentTheme($theme)
 877         {
 878                 $this->currentTheme = $theme;
 879         }
 880
 881         /**
 882          * Computes the current theme name based on the node settings, the user settings and the device type
 883          *
 884          * @throws Exception
 885          */
 886         private function computeCurrentTheme()
 887         {
 888                 $system_theme = $this->config->get('system', 'theme');
 889                 if (!$system_theme) {
 890                         throw new Exception($this->l10n->t('No system theme config value set.'));
 891                 }
 892
 893                 // Sane default
 894                 $this->currentTheme = $system_theme;
 895
 896                 $page_theme = null;
 897                 // Find the theme that belongs to the user whose stuff we are looking at
 898                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 899                         // Allow folks to override user themes and always use their own on their own site.
 900                         // This works only if the user is on the same server
 901                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 902                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 903                                 $page_theme = $user['theme'];
 904                         }
 905                 }
 906
 907                 $user_theme = Core\Session::get('theme', $system_theme);
 908
 909                 // Specific mobile theme override
 910                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 911                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 912                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 913
 914                         // --- means same mobile theme as desktop
 915                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
 916                                 $user_theme = $user_mobile_theme;
 917                         }
 918                 }
 919
 920                 if ($page_theme) {
 921                         $theme_name = $page_theme;
 922                 } else {
 923                         $theme_name = $user_theme;
 924                 }
 925
 926                 $theme_name = Strings::sanitizeFilePathItem($theme_name);
 927                 if ($theme_name
 928                         && in_array($theme_name, Theme::getAllowedList())
 929                         && (file_exists('view/theme/' . $theme_name . '/style.css')
 930                         || file_exists('view/theme/' . $theme_name . '/style.php'))
 931                 ) {
 932                         $this->currentTheme = $theme_name;
 933                 }
 934         }
 935
 936         /**
 937          * @brief Return full URL to theme which is currently in effect.
 938          *
 939          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 940          *
 941          * @return string
 942          * @throws HTTPException\InternalServerErrorException
 943          */
 944         public function getCurrentThemeStylesheetPath()
 945         {
 946                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
 947         }
 948
 949         /**
 950          * Check if request was an AJAX (xmlhttprequest) request.
 951          *
 952          * @return boolean true if it was an AJAX request
 953          */
 954         public function isAjax()
 955         {
 956                 return $this->isAjax;
 957         }
 958
 959         /**
 960          * Returns the value of a argv key
 961          * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
 962          *
 963          * @param int $position the position of the argument
 964          * @param mixed $default the default value if not found
 965          *
 966          * @return mixed returns the value of the argument
 967          */
 968         public function getArgumentValue($position, $default = '')
 969         {
 970                 if (array_key_exists($position, $this->argv)) {
 971                         return $this->argv[$position];
 972                 }
 973
 974                 return $default;
 975         }
 976
 977         /**
 978          * Sets the base url for use in cmdline programs which don't have
 979          * $_SERVER variables
 980          */
 981         public function checkURL()
 982         {
 983                 $url = $this->config->get('system', 'url');
 984
 985                 // if the url isn't set or the stored url is radically different
 986                 // than the currently visited url, store the current value accordingly.
 987                 // "Radically different" ignores common variations such as http vs https
 988                 // and www.example.com vs example.com.
 989                 // We will only change the url to an ip address if there is no existing setting
 990
 991                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->baseURL->getHostname()))) {
 992                         $this->config->set('system', 'url', $this->getBaseURL());
 993                 }
 994         }
 995
 996         /**
 997          * Frontend App script
 998          *
 999          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
1000          * request and a representation of the response.
1001          *
1002          * This probably should change to limit the size of this monster method.
1003          */
1004         public function runFrontend()
1005         {
1006                 try {
1007                         // Missing DB connection: ERROR
1008                         if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
1009                                 throw new HTTPException\InternalServerErrorException('Apologies but the website is unavailable at the moment.');
1010                         }
1011
1012                         // Max Load Average reached: ERROR
1013                         if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
1014                                 header('Retry-After: 120');
1015                                 header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
1016
1017                                 throw new HTTPException\ServiceUnavailableException('The node is currently overloaded. Please try again later.');
1018                         }
1019
1020                         if (!$this->getMode()->isInstall()) {
1021                                 // Force SSL redirection
1022                                 if ($this->baseURL->checkRedirectHttps()) {
1023                                         System::externalRedirect($this->getBaseURL() . '/' . $this->query_string);
1024                                 }
1025
1026                                 Core\Session::init();
1027                                 Core\Hook::callAll('init_1');
1028                         }
1029
1030                         // Exclude the backend processes from the session management
1031                         if (!$this->isBackend()) {
1032                                 $stamp1 = microtime(true);
1033                                 session_start();
1034                                 $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
1035                                 $this->l10n->setSessionVariable();
1036                                 $this->l10n->setLangFromSession();
1037                         } else {
1038                                 $_SESSION = [];
1039                                 Core\Worker::executeIfIdle();
1040                         }
1041
1042                         if ($this->getMode()->isNormal()) {
1043                                 $requester = HTTPSignature::getSigner('', $_SERVER);
1044                                 if (!empty($requester)) {
1045                                         Profile::addVisitorCookieForHandle($requester);
1046                                 }
1047                         }
1048
1049                         // ZRL
1050                         if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
1051                                 $this->query_string = Model\Profile::stripZrls($this->query_string);
1052                                 if (!local_user()) {
1053                                         // Only continue when the given profile link seems valid
1054                                         // Valid profile links contain a path with "/profile/" and no query parameters
1055                                         if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
1056                                                 strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
1057                                                 if (Core\Session::get('visitor_home') != $_GET["zrl"]) {
1058                                                         Core\Session::set('my_url', $_GET['zrl']);
1059                                                         Core\Session::set('authenticated', 0);
1060                                                 }
1061
1062                                                 Model\Profile::zrlInit($this);
1063                                         } else {
1064                                                 // Someone came with an invalid parameter, maybe as a DDoS attempt
1065                                                 // We simply stop processing here
1066                                                 Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
1067                                                 throw new HTTPException\ForbiddenException();
1068                                         }
1069                                 }
1070                         }
1071
1072                         if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
1073                                 $token = $_GET['owt'];
1074                                 $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
1075                                 Model\Profile::openWebAuthInit($token);
1076                         }
1077
1078                         Module\Login::sessionAuth();
1079
1080                         if (empty($_SESSION['authenticated'])) {
1081                                 header('X-Account-Management-Status: none');
1082                         }
1083
1084                         $_SESSION['sysmsg']       = Core\Session::get('sysmsg', []);
1085                         $_SESSION['sysmsg_info']  = Core\Session::get('sysmsg_info', []);
1086                         $_SESSION['last_updated'] = Core\Session::get('last_updated', []);
1087
1088                         /*
1089                          * check_config() is responsible for running update scripts. These automatically
1090                          * update the DB schema whenever we push a new one out. It also checks to see if
1091                          * any addons have been added or removed and reacts accordingly.
1092                          */
1093
1094                         // in install mode, any url loads install module
1095                         // but we need "view" module for stylesheet
1096                         if ($this->getMode()->isInstall() && $this->module !== 'install') {
1097                                 $this->internalRedirect('install');
1098                         } elseif (!$this->getMode()->isInstall() && !$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module !== 'maintenance') {
1099                                 $this->internalRedirect('maintenance');
1100                         } else {
1101                                 $this->checkURL();
1102                                 Core\Update::check($this->getBasePath(), false, $this->getMode());
1103                                 Core\Addon::loadAddons();
1104                                 Core\Hook::loadHooks();
1105                         }
1106
1107                         $this->page = [
1108                                 'aside' => '',
1109                                 'bottom' => '',
1110                                 'content' => '',
1111                                 'footer' => '',
1112                                 'htmlhead' => '',
1113                                 'nav' => '',
1114                                 'page_title' => '',
1115                                 'right_aside' => '',
1116                                 'template' => '',
1117                                 'title' => ''
1118                         ];
1119
1120                         // Compatibility with the Android Diaspora client
1121                         if ($this->module == 'stream') {
1122                                 $this->internalRedirect('network?order=post');
1123                         }
1124
1125                         if ($this->module == 'conversations') {
1126                                 $this->internalRedirect('message');
1127                         }
1128
1129                         if ($this->module == 'commented') {
1130                                 $this->internalRedirect('network?order=comment');
1131                         }
1132
1133                         if ($this->module == 'liked') {
1134                                 $this->internalRedirect('network?order=comment');
1135                         }
1136
1137                         if ($this->module == 'activity') {
1138                                 $this->internalRedirect('network?conv=1');
1139                         }
1140
1141                         if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
1142                                 $this->internalRedirect('bookmarklet');
1143                         }
1144
1145                         if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
1146                                 $this->internalRedirect('settings');
1147                         }
1148
1149                         if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
1150                                 $this->internalRedirect('search');
1151                         }
1152
1153                         // Compatibility with the Firefox App
1154                         if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
1155                                 $this->module = "login";
1156                         }
1157
1158                         /*
1159                          * ROUTING
1160                          *
1161                          * From the request URL, routing consists of obtaining the name of a BaseModule-extending class of which the
1162                          * post() and/or content() static methods can be respectively called to produce a data change or an output.
1163                          */
1164
1165                         // First we try explicit routes defined in App\Router
1166                         $this->router->collectRoutes();
1167
1168                         $data = $this->router->getRouteCollector();
1169                         Hook::callAll('route_collection', $data);
1170
1171                         $this->module_class = $this->router->getModuleClass($this->cmd);
1172
1173                         // Then we try addon-provided modules that we wrap in the LegacyModule class
1174                         if (!$this->module_class && Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1175                                 //Check if module is an app and if public access to apps is allowed or not
1176                                 $privateapps = $this->config->get('config', 'private_addons', false);
1177                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1178                                         info($this->l10n->t("You must be logged in to use addons. "));
1179                                 } else {
1180                                         include_once "addon/{$this->module}/{$this->module}.php";
1181                                         if (function_exists($this->module . '_module')) {
1182                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1183                                                 $this->module_class = LegacyModule::class;
1184                                         }
1185                                 }
1186                         }
1187
1188                         /* Finally, we look for a 'standard' program module in the 'mod' directory
1189                          * We emulate a Module class through the LegacyModule class
1190                          */
1191                         if (!$this->module_class && file_exists("mod/{$this->module}.php")) {
1192                                 LegacyModule::setModuleFile("mod/{$this->module}.php");
1193                                 $this->module_class = LegacyModule::class;
1194                         }
1195
1196                         /* The URL provided does not resolve to a valid module.
1197                          *
1198                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1199                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1200                          * we are going to trap this and redirect back to the requested page. As long as you don't have a critical error on your page
1201                          * this will often succeed and eventually do the right thing.
1202                          *
1203                          * Otherwise we are going to emit a 404 not found.
1204                          */
1205                         if (!$this->module_class) {
1206                                 // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
1207                                 if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
1208                                         exit();
1209                                 }
1210
1211                                 if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
1212                                         Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
1213                                         $this->internalRedirect($_SERVER['REQUEST_URI']);
1214                                 }
1215
1216                                 Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1217
1218                                 $this->module_class = Module\PageNotFound::class;
1219                         }
1220
1221                         // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1222                         $this->page['page_title'] = $this->module;
1223
1224                         $placeholder = '';
1225
1226                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1227
1228                         call_user_func([$this->module_class, 'init']);
1229
1230                         // "rawContent" is especially meant for technical endpoints.
1231                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1232                         call_user_func([$this->module_class, 'rawContent']);
1233
1234                         // Load current theme info after module has been initialized as theme could have been set in module
1235                         $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1236                         if (file_exists($theme_info_file)) {
1237                                 require_once $theme_info_file;
1238                         }
1239
1240                         if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1241                                 $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1242                                 $func($this);
1243                         }
1244
1245                         if ($_SERVER['REQUEST_METHOD'] === 'POST') {
1246                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1247                                 call_user_func([$this->module_class, 'post']);
1248                         }
1249
1250                         Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1251                         call_user_func([$this->module_class, 'afterpost']);
1252                 } catch(HTTPException $e) {
1253                         Module\Special\HTTPException::rawContent($e);
1254                 }
1255
1256                 $content = '';
1257
1258                 try {
1259                         $arr = ['content' => $content];
1260                         Core\Hook::callAll($this->module . '_mod_content', $arr);
1261                         $content = $arr['content'];
1262                         $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1263                         Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1264                         $content .= $arr['content'];
1265                 } catch(HTTPException $e) {
1266                         $content = Module\Special\HTTPException::content($e);
1267                 }
1268
1269                 // initialise content region
1270                 if ($this->getMode()->isNormal()) {
1271                         Core\Hook::callAll('page_content_top', $this->page['content']);
1272                 }
1273
1274                 $this->page['content'] .= $content;
1275
1276                 /* Create the page head after setting the language
1277                  * and getting any auth credentials.
1278                  *
1279                  * Moved initHead() and initFooter() to after
1280                  * all the module functions have executed so that all
1281                  * theme choices made by the modules can take effect.
1282                  */
1283                 $this->initHead();
1284
1285                 /* Build the page ending -- this is stuff that goes right before
1286                  * the closing </body> tag
1287                  */
1288                 $this->initFooter();
1289
1290                 if (!$this->isAjax()) {
1291                         Core\Hook::callAll('page_end', $this->page['content']);
1292                 }
1293
1294                 // Add the navigation (menu) template
1295                 if ($this->module != 'install' && $this->module != 'maintenance') {
1296                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1297                         $this->page['nav']       = Content\Nav::build($this);
1298                 }
1299
1300                 // Build the page - now that we have all the components
1301                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1302                         $doc = new DOMDocument();
1303
1304                         $target = new DOMDocument();
1305                         $target->loadXML("<root></root>");
1306
1307                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1308
1309                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1310                         @$doc->loadHTML($content);
1311
1312                         $xpath = new DOMXPath($doc);
1313
1314                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1315
1316                         foreach ($list as $item) {
1317                                 $item = $target->importNode($item, true);
1318
1319                                 // And then append it to the target
1320                                 $target->documentElement->appendChild($item);
1321                         }
1322
1323                         if ($_GET["mode"] == "raw") {
1324                                 header("Content-type: text/html; charset=utf-8");
1325
1326                                 echo substr($target->saveHTML(), 6, -8);
1327
1328                                 exit();
1329                         }
1330                 }
1331
1332                 $page    = $this->page;
1333                 $profile = $this->profile;
1334
1335                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1336                 header("Content-type: text/html; charset=utf-8");
1337
1338                 if ($this->config->get('system', 'hsts') && ($this->baseURL->getSSLPolicy() == BaseUrl::SSL_POLICY_FULL)) {
1339                         header("Strict-Transport-Security: max-age=31536000");
1340                 }
1341
1342                 // Some security stuff
1343                 header('X-Content-Type-Options: nosniff');
1344                 header('X-XSS-Protection: 1; mode=block');
1345                 header('X-Permitted-Cross-Domain-Policies: none');
1346                 header('X-Frame-Options: sameorigin');
1347
1348                 // Things like embedded OSM maps don't work, when this is enabled
1349                 // 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'");
1350
1351                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1352                  * to load another page template than the default one.
1353                  * The page templates are located in /view/php/ or in the theme directory.
1354                  */
1355                 if (isset($_GET["mode"])) {
1356                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1357                 }
1358
1359                 // If there is no page template use the default page template
1360                 if (empty($template)) {
1361                         $template = Core\Theme::getPathForFile("default.php");
1362                 }
1363
1364                 // Theme templates expect $a as an App instance
1365                 $a = $this;
1366
1367                 // Used as is in view/php/default.php
1368                 $lang = $this->l10n->getCurrentLang();
1369
1370                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1371                 require_once $template;
1372         }
1373
1374         /**
1375          * Redirects to another module relative to the current Friendica base.
1376          * If you want to redirect to a external URL, use System::externalRedirectTo()
1377          *
1378          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1379          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1380          *
1381          * @throws HTTPException\InternalServerErrorException In Case the given URL is not relative to the Friendica node
1382          */
1383         public function internalRedirect($toUrl = '', $ssl = false)
1384         {
1385                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1386                         throw new HTTPException\InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1387                 }
1388
1389                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1390                 Core\System::externalRedirect($redirectTo);
1391         }
1392
1393         /**
1394          * Automatically redirects to relative or absolute URL
1395          * Should only be used if it isn't clear if the URL is either internal or external
1396          *
1397          * @param string $toUrl The target URL
1398          * @throws HTTPException\InternalServerErrorException
1399          */
1400         public function redirect($toUrl)
1401         {
1402                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1403                         Core\System::externalRedirect($toUrl);
1404                 } else {
1405                         $this->internalRedirect($toUrl);
1406                 }
1407         }
1408 }