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\IConfigCache;
  12 use Friendica\Core\Config\Configuration;
  13 use Friendica\Core\Hook;
  14 use Friendica\Core\Theme;
  15 use Friendica\Database\DBA;
  16 use Friendica\Model\Profile;
  17 use Friendica\Network\HTTPException\InternalServerErrorException;
  18 use Friendica\Util\BaseURL;
  19 use Friendica\Util\Config\ConfigFileLoader;
  20 use Friendica\Util\HTTPSignature;
  21 use Friendica\Util\Profiler;
  22 use Friendica\Util\Strings;
  23 use Psr\Log\LoggerInterface;
  24
  25 /**
  26  *
  27  * class: App
  28  *
  29  * @brief Our main application structure for the life of this page.
  30  *
  31  * Primarily deals with the URL that got us here
  32  * and tries to make some sense of it, and
  33  * stores our page contents and config storage
  34  * and anything else that might need to be passed around
  35  * before we spit the page out.
  36  *
  37  */
  38 class App
  39 {
  40         public $module_class = null;
  41         public $query_string = '';
  42         public $page = [];
  43         public $profile;
  44         public $profile_uid;
  45         public $user;
  46         public $cid;
  47         public $contact;
  48         public $contacts;
  49         public $page_contact;
  50         public $content;
  51         public $data = [];
  52         public $error = false;
  53         public $cmd = '';
  54         public $argv;
  55         public $argc;
  56         public $module;
  57         public $timezone;
  58         public $interactive = true;
  59         public $identities;
  60         public $is_mobile = false;
  61         public $is_tablet = false;
  62         public $theme_info = [];
  63         public $category;
  64         // Allow themes to control internal parameters
  65         // by changing App values in theme.php
  66
  67         public $sourcename = '';
  68         public $videowidth = 425;
  69         public $videoheight = 350;
  70         public $force_max_items = 0;
  71         public $theme_events_in_profile = true;
  72
  73         public $stylesheets = [];
  74         public $footerScripts = [];
  75
  76         /**
  77          * @var App\Mode The Mode of the Application
  78          */
  79         private $mode;
  80
  81         /**
  82          * @var App\Router
  83          */
  84         private $router;
  85
  86         /**
  87          * @var BaseURL
  88          */
  89         private $baseURL;
  90
  91         /**
  92          * @var bool true, if the call is from the Friendica APP, otherwise false
  93          */
  94         private $isFriendicaApp;
  95
  96         /**
  97          * @var bool true, if the call is from an backend node (f.e. worker)
  98          */
  99         private $isBackend;
 100
 101         /**
 102          * @var string The name of the current theme
 103          */
 104         private $currentTheme;
 105
 106         /**
 107          * @var bool check if request was an AJAX (xmlhttprequest) request
 108          */
 109         private $isAjax;
 110
 111         /**
 112          * @var MobileDetect
 113          */
 114         public $mobileDetect;
 115
 116         /**
 117          * @var Configuration The config
 118          */
 119         private $config;
 120
 121         /**
 122          * @var LoggerInterface The logger
 123          */
 124         private $logger;
 125
 126         /**
 127          * @var Profiler The profiler of this app
 128          */
 129         private $profiler;
 130
 131         /**
 132          * Returns the current config cache of this node
 133          *
 134          * @return IConfigCache
 135          */
 136         public function getConfigCache()
 137         {
 138                 return $this->config->getCache();
 139         }
 140
 141         /**
 142          * The basepath of this app
 143          *
 144          * @return string
 145          */
 146         public function getBasePath()
 147         {
 148                 return $this->config->get('system', 'basepath');
 149         }
 150
 151         /**
 152          * The Logger of this app
 153          *
 154          * @return LoggerInterface
 155          */
 156         public function getLogger()
 157         {
 158                 return $this->logger;
 159         }
 160
 161         /**
 162          * The profiler of this app
 163          *
 164          * @return Profiler
 165          */
 166         public function getProfiler()
 167         {
 168                 return $this->profiler;
 169         }
 170
 171         /**
 172          * Returns the Mode of the Application
 173          *
 174          * @return App\Mode The Application Mode
 175          */
 176         public function getMode()
 177         {
 178                 return $this->mode;
 179         }
 180
 181         /**
 182          * Returns the router of the Application
 183          *
 184          * @return App\Router
 185          */
 186         public function getRouter()
 187         {
 188                 return $this->router;
 189         }
 190
 191         /**
 192          * Register a stylesheet file path to be included in the <head> tag of every page.
 193          * Inclusion is done in App->initHead().
 194          * The path can be absolute or relative to the Friendica installation base folder.
 195          *
 196          * @see initHead()
 197          *
 198          * @param string $path
 199          */
 200         public function registerStylesheet($path)
 201         {
 202                 if (mb_strpos($path, $this->getBasePath() . DIRECTORY_SEPARATOR) === 0) {
 203                         $path = mb_substr($path, mb_strlen($this->getBasePath() . DIRECTORY_SEPARATOR));
 204                 }
 205
 206                 $this->stylesheets[] = trim($path, '/');
 207         }
 208
 209         /**
 210          * Register a javascript file path to be included in the <footer> tag of every page.
 211          * Inclusion is done in App->initFooter().
 212          * The path can be absolute or relative to the Friendica installation base folder.
 213          *
 214          * @see initFooter()
 215          *
 216          * @param string $path
 217          */
 218         public function registerFooterScript($path)
 219         {
 220                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 221
 222                 $this->footerScripts[] = trim($url, '/');
 223         }
 224
 225         public $queue;
 226
 227         /**
 228          * @brief App constructor.
 229          *
 230          * @param Configuration    $config    The Configuration
 231          * @param App\Mode         $mode      The mode of this Friendica app
 232          * @param App\Router       $router    The router of this Friendica app
 233          * @param BaseURL          $baseURL   The full base URL of this Friendica app
 234          * @param LoggerInterface  $logger    The current app logger
 235          * @param Profiler         $profiler  The profiler of this application
 236          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 237          *
 238          * @throws Exception if the Basepath is not usable
 239          */
 240         public function __construct(Configuration $config, App\Mode $mode, App\Router $router, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
 241         {
 242                 BaseObject::setApp($this);
 243
 244                 $this->config   = $config;
 245                 $this->mode     = $mode;
 246                 $this->router   = $router;
 247                 $this->baseURL  = $baseURL;
 248                 $this->profiler = $profiler;
 249                 $this->logger   = $logger;
 250
 251                 $this->checkBackend($isBackend);
 252                 $this->checkFriendicaApp();
 253
 254                 $this->profiler->reset();
 255
 256                 $this->reload();
 257
 258                 set_time_limit(0);
 259
 260                 // This has to be quite large to deal with embedded private photos
 261                 ini_set('pcre.backtrack_limit', 500000);
 262
 263                 set_include_path(
 264                         get_include_path() . PATH_SEPARATOR
 265                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 266                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 267                         . $this->getBasePath());
 268
 269                 if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
 270                         $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
 271                 } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
 272                         $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
 273                 }
 274
 275                 // removing trailing / - maybe a nginx problem
 276                 $this->query_string = ltrim($this->query_string, '/');
 277
 278                 if (!empty($_GET['pagename'])) {
 279                         $this->cmd = trim($_GET['pagename'], '/\\');
 280                 } elseif (!empty($_GET['q'])) {
 281                         $this->cmd = trim($_GET['q'], '/\\');
 282                 }
 283
 284                 // fix query_string
 285                 $this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
 286
 287                 // unix style "homedir"
 288                 if (substr($this->cmd, 0, 1) === '~') {
 289                         $this->cmd = 'profile/' . substr($this->cmd, 1);
 290                 }
 291
 292                 // Diaspora style profile url
 293                 if (substr($this->cmd, 0, 2) === 'u/') {
 294                         $this->cmd = 'profile/' . substr($this->cmd, 2);
 295                 }
 296
 297                 /*
 298                  * Break the URL path into C style argc/argv style arguments for our
 299                  * modules. Given "http://example.com/module/arg1/arg2", $this->argc
 300                  * will be 3 (integer) and $this->argv will contain:
 301                  *   [0] => 'module'
 302                  *   [1] => 'arg1'
 303                  *   [2] => 'arg2'
 304                  *
 305                  *
 306                  * There will always be one argument. If provided a naked domain
 307                  * URL, $this->argv[0] is set to "home".
 308                  */
 309
 310                 $this->argv = explode('/', $this->cmd);
 311                 $this->argc = count($this->argv);
 312                 if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
 313                         $this->module = str_replace('.', '_', $this->argv[0]);
 314                         $this->module = str_replace('-', '_', $this->module);
 315                 } else {
 316                         $this->argc = 1;
 317                         $this->argv = ['home'];
 318                         $this->module = 'home';
 319                 }
 320
 321                 // Detect mobile devices
 322                 $mobile_detect = new MobileDetect();
 323
 324                 $this->mobileDetect = $mobile_detect;
 325
 326                 $this->is_mobile = $mobile_detect->isMobile();
 327                 $this->is_tablet = $mobile_detect->isTablet();
 328
 329                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 330
 331                 // Register template engines
 332                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 333         }
 334
 335         /**
 336          * Reloads the whole app instance
 337          */
 338         public function reload()
 339         {
 340                 $this->getMode()->determine($this->getBasePath());
 341
 342                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 343                         $loader = new ConfigFileLoader($this->getBasePath(), $this->getMode());
 344                         $this->config->getCache()->load($loader->loadCoreConfig('addon'), true);
 345
 346                         $this->profiler->update(
 347                                 $this->config->get('system', 'profiler', false),
 348                                 $this->config->get('rendertime', 'callstack', false));
 349
 350                         Core\Hook::loadHooks();
 351                         $loader = new ConfigFileLoader($this->getBasePath(), $this->mode);
 352                         Core\Hook::callAll('load_config', $loader);
 353                 }
 354
 355                 $this->loadDefaultTimezone();
 356
 357                 Core\L10n::init();
 358         }
 359
 360         /**
 361          * Loads the default timezone
 362          *
 363          * Include support for legacy $default_timezone
 364          *
 365          * @global string $default_timezone
 366          */
 367         private function loadDefaultTimezone()
 368         {
 369                 if ($this->config->get('system', 'default_timezone')) {
 370                         $this->timezone = $this->config->get('system', 'default_timezone');
 371                 } else {
 372                         global $default_timezone;
 373                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 374                 }
 375
 376                 if ($this->timezone) {
 377                         date_default_timezone_set($this->timezone);
 378                 }
 379         }
 380
 381         /**
 382          * Returns the scheme of the current call
 383          * @return string
 384          *
 385          * @deprecated 2019.06 - use BaseURL->getScheme() instead
 386          */
 387         public function getScheme()
 388         {
 389                 return $this->baseURL->getScheme();
 390         }
 391
 392         /**
 393          * Retrieves the Friendica instance base URL
 394          *
 395          * @param bool $ssl Whether to append http or https under BaseURL::SSL_POLICY_SELFSIGN
 396          *
 397          * @return string Friendica server base URL
 398          *
 399          * @deprecated 2019.06 - use BaseURL->get($ssl) instead
 400          */
 401         public function getBaseURL($ssl = false)
 402         {
 403                 return $this->baseURL->get($ssl);
 404         }
 405
 406         /**
 407          * @brief Initializes the baseurl components
 408          *
 409          * Clears the baseurl cache to prevent inconsistencies
 410          *
 411          * @param string $url
 412          *
 413          * @deprecated 2019.06 - use BaseURL->saveByURL($url) instead
 414          */
 415         public function setBaseURL($url)
 416         {
 417                 $this->baseURL->saveByURL($url);
 418         }
 419
 420         /**
 421          * Returns the current hostname
 422          *
 423          * @return string
 424          *
 425          * @deprecated 2019.06 - use BaseURL->getHostname() instead
 426          */
 427         public function getHostName()
 428         {
 429                 return $this->baseURL->getHostname();
 430         }
 431
 432         /**
 433          * Returns the sub-path of the full URL
 434          *
 435          * @return string
 436          *
 437          * @deprecated 2019.06 - use BaseURL->getUrlPath() instead
 438          */
 439         public function getURLPath()
 440         {
 441                 return $this->baseURL->getUrlPath();
 442         }
 443
 444         /**
 445          * Initializes App->page['htmlhead'].
 446          *
 447          * Includes:
 448          * - Page title
 449          * - Favicons
 450          * - Registered stylesheets (through App->registerStylesheet())
 451          * - Infinite scroll data
 452          * - head.tpl template
 453          */
 454         public function initHead()
 455         {
 456                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 457
 458                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 459                 if ($interval < 0) {
 460                         $interval = 2147483647;
 461                 }
 462
 463                 if ($interval < 10000) {
 464                         $interval = 40000;
 465                 }
 466
 467                 // Default title: current module called
 468                 if (empty($this->page['title']) && $this->module) {
 469                         $this->page['title'] = ucfirst($this->module);
 470                 }
 471
 472                 // Prepend the sitename to the page title
 473                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 474
 475                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 476                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 477                 } else {
 478                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 479                 }
 480
 481                 $this->registerStylesheet($stylesheet);
 482
 483                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 484                 if ($shortcut_icon == '') {
 485                         $shortcut_icon = 'images/friendica-32.png';
 486                 }
 487
 488                 $touch_icon = $this->config->get('system', 'touch_icon');
 489                 if ($touch_icon == '') {
 490                         $touch_icon = 'images/friendica-128.png';
 491                 }
 492
 493                 Core\Hook::callAll('head', $this->page['htmlhead']);
 494
 495                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 496                 /* put the head template at the beginning of page['htmlhead']
 497                  * since the code added by the modules frequently depends on it
 498                  * being first
 499                  */
 500                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 501                         '$baseurl'         => $this->getBaseURL(),
 502                         '$local_user'      => local_user(),
 503                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 504                         '$delitem'         => Core\L10n::t('Delete this item?'),
 505                         '$update_interval' => $interval,
 506                         '$shortcut_icon'   => $shortcut_icon,
 507                         '$touch_icon'      => $touch_icon,
 508                         '$block_public'    => intval($this->config->get('system', 'block_public')),
 509                         '$stylesheets'     => $this->stylesheets,
 510                 ]) . $this->page['htmlhead'];
 511         }
 512
 513         /**
 514          * Initializes App->page['footer'].
 515          *
 516          * Includes:
 517          * - Javascript homebase
 518          * - Mobile toggle link
 519          * - Registered footer scripts (through App->registerFooterScript())
 520          * - footer.tpl template
 521          */
 522         public function initFooter()
 523         {
 524                 // If you're just visiting, let javascript take you home
 525                 if (!empty($_SESSION['visitor_home'])) {
 526                         $homebase = $_SESSION['visitor_home'];
 527                 } elseif (local_user()) {
 528                         $homebase = 'profile/' . $this->user['nickname'];
 529                 }
 530
 531                 if (isset($homebase)) {
 532                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 533                 }
 534
 535                 /*
 536                  * Add a "toggle mobile" link if we're using a mobile device
 537                  */
 538                 if ($this->is_mobile || $this->is_tablet) {
 539                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 540                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 541                         } else {
 542                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 543                         }
 544                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 545                                 '$toggle_link' => $link,
 546                                 '$toggle_text' => Core\L10n::t('toggle mobile')
 547                         ]);
 548                 }
 549
 550                 Core\Hook::callAll('footer', $this->page['footer']);
 551
 552                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 553                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 554                         '$baseurl' => $this->getBaseURL(),
 555                         '$footerScripts' => $this->footerScripts,
 556                 ]) . $this->page['footer'];
 557         }
 558
 559         /**
 560          * @brief Removes the base url from an url. This avoids some mixed content problems.
 561          *
 562          * @param string $origURL
 563          *
 564          * @return string The cleaned url
 565          * @throws InternalServerErrorException
 566          */
 567         public function removeBaseURL($origURL)
 568         {
 569                 // Remove the hostname from the url if it is an internal link
 570                 $nurl = Util\Strings::normaliseLink($origURL);
 571                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 572                 $url = str_replace($base . '/', '', $nurl);
 573
 574                 // if it is an external link return the orignal value
 575                 if ($url == Util\Strings::normaliseLink($origURL)) {
 576                         return $origURL;
 577                 } else {
 578                         return $url;
 579                 }
 580         }
 581
 582         /**
 583          * Returns the current UserAgent as a String
 584          *
 585          * @return string the UserAgent as a String
 586          * @throws InternalServerErrorException
 587          */
 588         public function getUserAgent()
 589         {
 590                 return
 591                         FRIENDICA_PLATFORM . " '" .
 592                         FRIENDICA_CODENAME . "' " .
 593                         FRIENDICA_VERSION . '-' .
 594                         DB_UPDATE_VERSION . '; ' .
 595                         $this->getBaseURL();
 596         }
 597
 598         /**
 599          * Checks, if the call is from the Friendica App
 600          *
 601          * Reason:
 602          * The friendica client has problems with the GUID in the notify. this is some workaround
 603          */
 604         private function checkFriendicaApp()
 605         {
 606                 // Friendica-Client
 607                 $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
 608         }
 609
 610         /**
 611          *      Is the call via the Friendica app? (not a "normale" call)
 612          *
 613          * @return bool true if it's from the Friendica app
 614          */
 615         public function isFriendicaApp()
 616         {
 617                 return $this->isFriendicaApp;
 618         }
 619
 620         /**
 621          * @brief Checks if the site is called via a backend process
 622          *
 623          * This isn't a perfect solution. But we need this check very early.
 624          * So we cannot wait until the modules are loaded.
 625          *
 626          * @param string $backend true, if the backend flag was set during App initialization
 627          *
 628          */
 629         private function checkBackend($backend) {
 630                 static $backends = [
 631                         '_well_known',
 632                         'api',
 633                         'dfrn_notify',
 634                         'fetch',
 635                         'hcard',
 636                         'hostxrd',
 637                         'manifest',
 638                         'nodeinfo',
 639                         'noscrape',
 640                         'p',
 641                         'poco',
 642                         'post',
 643                         'proxy',
 644                         'pubsub',
 645                         'pubsubhubbub',
 646                         'receive',
 647                         'rsd_xml',
 648                         'salmon',
 649                         'statistics_json',
 650                         'xrd',
 651                 ];
 652
 653                 // Check if current module is in backend or backend flag is set
 654                 $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
 655         }
 656
 657         /**
 658          * Returns true, if the call is from a backend node (f.e. from a worker)
 659          *
 660          * @return bool Is it a known backend?
 661          */
 662         public function isBackend()
 663         {
 664                 return $this->isBackend;
 665         }
 666
 667         /**
 668          * @brief Checks if the maximum number of database processes is reached
 669          *
 670          * @return bool Is the limit reached?
 671          */
 672         public function isMaxProcessesReached()
 673         {
 674                 // Deactivated, needs more investigating if this check really makes sense
 675                 return false;
 676
 677                 /*
 678                  * Commented out to suppress static analyzer issues
 679                  *
 680                 if ($this->is_backend()) {
 681                         $process = 'backend';
 682                         $max_processes = $this->config->get('system', 'max_processes_backend');
 683                         if (intval($max_processes) == 0) {
 684                                 $max_processes = 5;
 685                         }
 686                 } else {
 687                         $process = 'frontend';
 688                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 689                         if (intval($max_processes) == 0) {
 690                                 $max_processes = 20;
 691                         }
 692                 }
 693
 694                 $processlist = DBA::processlist();
 695                 if ($processlist['list'] != '') {
 696                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 697
 698                         if ($processlist['amount'] > $max_processes) {
 699                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 700                                 return true;
 701                         }
 702                 }
 703                 return false;
 704                  */
 705         }
 706
 707         /**
 708          * @brief Checks if the minimal memory is reached
 709          *
 710          * @return bool Is the memory limit reached?
 711          * @throws InternalServerErrorException
 712          */
 713         public function isMinMemoryReached()
 714         {
 715                 $min_memory = $this->config->get('system', 'min_memory', 0);
 716                 if ($min_memory == 0) {
 717                         return false;
 718                 }
 719
 720                 if (!is_readable('/proc/meminfo')) {
 721                         return false;
 722                 }
 723
 724                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 725
 726                 $meminfo = [];
 727                 foreach ($memdata as $line) {
 728                         $data = explode(':', $line);
 729                         if (count($data) != 2) {
 730                                 continue;
 731                         }
 732                         list($key, $val) = $data;
 733                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 734                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 735                 }
 736
 737                 if (!isset($meminfo['MemFree'])) {
 738                         return false;
 739                 }
 740
 741                 $free = $meminfo['MemFree'];
 742
 743                 $reached = ($free < $min_memory);
 744
 745                 if ($reached) {
 746                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 747                 }
 748
 749                 return $reached;
 750         }
 751
 752         /**
 753          * @brief Checks if the maximum load is reached
 754          *
 755          * @return bool Is the load reached?
 756          * @throws InternalServerErrorException
 757          */
 758         public function isMaxLoadReached()
 759         {
 760                 if ($this->isBackend()) {
 761                         $process = 'backend';
 762                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 763                         if ($maxsysload < 1) {
 764                                 $maxsysload = 50;
 765                         }
 766                 } else {
 767                         $process = 'frontend';
 768                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 769                         if ($maxsysload < 1) {
 770                                 $maxsysload = 50;
 771                         }
 772                 }
 773
 774                 $load = Core\System::currentLoad();
 775                 if ($load) {
 776                         if (intval($load) > $maxsysload) {
 777                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 778                                 return true;
 779                         }
 780                 }
 781                 return false;
 782         }
 783
 784         /**
 785          * Executes a child process with 'proc_open'
 786          *
 787          * @param string $command The command to execute
 788          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 789          * @throws InternalServerErrorException
 790          */
 791         public function proc_run($command, $args)
 792         {
 793                 if (!function_exists('proc_open')) {
 794                         return;
 795                 }
 796
 797                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 798
 799                 foreach ($args as $key => $value) {
 800                         if (!is_null($value) && is_bool($value) && !$value) {
 801                                 continue;
 802                         }
 803
 804                         $cmdline .= ' --' . $key;
 805                         if (!is_null($value) && !is_bool($value)) {
 806                                 $cmdline .= ' ' . $value;
 807                         }
 808                 }
 809
 810                 if ($this->isMinMemoryReached()) {
 811                         return;
 812                 }
 813
 814                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 815                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 816                 } else {
 817                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 818                 }
 819                 if (!is_resource($resource)) {
 820                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 821                         return;
 822                 }
 823                 proc_close($resource);
 824         }
 825
 826         /**
 827          * Generates the site's default sender email address
 828          *
 829          * @return string
 830          * @throws InternalServerErrorException
 831          */
 832         public function getSenderEmailAddress()
 833         {
 834                 $sender_email = $this->config->get('config', 'sender_email');
 835                 if (empty($sender_email)) {
 836                         $hostname = $this->baseURL->getHostname();
 837                         if (strpos($hostname, ':')) {
 838                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 839                         }
 840
 841                         $sender_email = 'noreply@' . $hostname;
 842                 }
 843
 844                 return $sender_email;
 845         }
 846
 847         /**
 848          * Returns the current theme name.
 849          *
 850          * @return string the name of the current theme
 851          * @throws InternalServerErrorException
 852          */
 853         public function getCurrentTheme()
 854         {
 855                 if ($this->getMode()->isInstall()) {
 856                         return '';
 857                 }
 858
 859                 if (!$this->currentTheme) {
 860                         $this->computeCurrentTheme();
 861                 }
 862
 863                 return $this->currentTheme;
 864         }
 865
 866         public function setCurrentTheme($theme)
 867         {
 868                 $this->currentTheme = $theme;
 869         }
 870
 871         /**
 872          * Computes the current theme name based on the node settings, the user settings and the device type
 873          *
 874          * @throws Exception
 875          */
 876         private function computeCurrentTheme()
 877         {
 878                 $system_theme = $this->config->get('system', 'theme');
 879                 if (!$system_theme) {
 880                         throw new Exception(Core\L10n::t('No system theme config value set.'));
 881                 }
 882
 883                 // Sane default
 884                 $this->currentTheme = $system_theme;
 885
 886                 $page_theme = null;
 887                 // Find the theme that belongs to the user whose stuff we are looking at
 888                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 889                         // Allow folks to override user themes and always use their own on their own site.
 890                         // This works only if the user is on the same server
 891                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 892                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 893                                 $page_theme = $user['theme'];
 894                         }
 895                 }
 896
 897                 $user_theme = Core\Session::get('theme', $system_theme);
 898
 899                 // Specific mobile theme override
 900                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 901                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 902                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 903
 904                         // --- means same mobile theme as desktop
 905                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
 906                                 $user_theme = $user_mobile_theme;
 907                         }
 908                 }
 909
 910                 if ($page_theme) {
 911                         $theme_name = $page_theme;
 912                 } else {
 913                         $theme_name = $user_theme;
 914                 }
 915
 916                 $theme_name = Strings::sanitizeFilePathItem($theme_name);
 917                 if ($theme_name
 918                         && in_array($theme_name, Theme::getAllowedList())
 919                         && (file_exists('view/theme/' . $theme_name . '/style.css')
 920                         || file_exists('view/theme/' . $theme_name . '/style.php'))
 921                 ) {
 922                         $this->currentTheme = $theme_name;
 923                 }
 924         }
 925
 926         /**
 927          * @brief Return full URL to theme which is currently in effect.
 928          *
 929          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 930          *
 931          * @return string
 932          * @throws InternalServerErrorException
 933          */
 934         public function getCurrentThemeStylesheetPath()
 935         {
 936                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
 937         }
 938
 939         /**
 940          * Check if request was an AJAX (xmlhttprequest) request.
 941          *
 942          * @return boolean true if it was an AJAX request
 943          */
 944         public function isAjax()
 945         {
 946                 return $this->isAjax;
 947         }
 948
 949         /**
 950          * Returns the value of a argv key
 951          * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
 952          *
 953          * @param int $position the position of the argument
 954          * @param mixed $default the default value if not found
 955          *
 956          * @return mixed returns the value of the argument
 957          */
 958         public function getArgumentValue($position, $default = '')
 959         {
 960                 if (array_key_exists($position, $this->argv)) {
 961                         return $this->argv[$position];
 962                 }
 963
 964                 return $default;
 965         }
 966
 967         /**
 968          * Sets the base url for use in cmdline programs which don't have
 969          * $_SERVER variables
 970          */
 971         public function checkURL()
 972         {
 973                 $url = $this->config->get('system', 'url');
 974
 975                 // if the url isn't set or the stored url is radically different
 976                 // than the currently visited url, store the current value accordingly.
 977                 // "Radically different" ignores common variations such as http vs https
 978                 // and www.example.com vs example.com.
 979                 // We will only change the url to an ip address if there is no existing setting
 980
 981                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->baseURL->getHostname()))) {
 982                         $this->config->set('system', 'url', $this->getBaseURL());
 983                 }
 984         }
 985
 986         /**
 987          * Frontend App script
 988          *
 989          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
 990          * request and a representation of the response.
 991          *
 992          * This probably should change to limit the size of this monster method.
 993          */
 994         public function runFrontend()
 995         {
 996                 // Missing DB connection: ERROR
 997                 if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
 998                         Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
 999                 }
1000
1001                 // Max Load Average reached: ERROR
1002                 if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
1003                         header('Retry-After: 120');
1004                         header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
1005
1006                         Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
1007                 }
1008
1009                 if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
1010                         Core\System::httpExit(404);
1011                 }
1012
1013                 if (!$this->getMode()->isInstall()) {
1014                         // Force SSL redirection
1015                         if ($this->baseURL->checkRedirectHttps()) {
1016                                 header('HTTP/1.1 302 Moved Temporarily');
1017                                 header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
1018                                 exit();
1019                         }
1020
1021                         Core\Session::init();
1022                         Core\Hook::callAll('init_1');
1023                 }
1024
1025                 // Exclude the backend processes from the session management
1026                 if (!$this->isBackend()) {
1027                         $stamp1 = microtime(true);
1028                         session_start();
1029                         $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
1030                         Core\L10n::setSessionVariable();
1031                         Core\L10n::setLangFromSession();
1032                 } else {
1033                         $_SESSION = [];
1034                         Core\Worker::executeIfIdle();
1035                 }
1036
1037                 if ($this->getMode()->isNormal()) {
1038                         $requester = HTTPSignature::getSigner('', $_SERVER);
1039                         if (!empty($requester)) {
1040                                 Profile::addVisitorCookieForHandle($requester);
1041                         }
1042                 }
1043
1044                 // ZRL
1045                 if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
1046                         $this->query_string = Model\Profile::stripZrls($this->query_string);
1047                         if (!local_user()) {
1048                                 // Only continue when the given profile link seems valid
1049                                 // Valid profile links contain a path with "/profile/" and no query parameters
1050                                 if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
1051                                         strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
1052                                         if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
1053                                                 $_SESSION['my_url'] = $_GET['zrl'];
1054                                                 $_SESSION['authenticated'] = 0;
1055                                         }
1056                                         Model\Profile::zrlInit($this);
1057                                 } else {
1058                                         // Someone came with an invalid parameter, maybe as a DDoS attempt
1059                                         // We simply stop processing here
1060                                         Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
1061                                         Core\System::httpExit(403, ['title' => '403 Forbidden']);
1062                                 }
1063                         }
1064                 }
1065
1066                 if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
1067                         $token = $_GET['owt'];
1068                         $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
1069                         Model\Profile::openWebAuthInit($token);
1070                 }
1071
1072                 Module\Login::sessionAuth();
1073
1074                 if (empty($_SESSION['authenticated'])) {
1075                         header('X-Account-Management-Status: none');
1076                 }
1077
1078                 $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
1079                 $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
1080                 $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
1081
1082                 /*
1083                  * check_config() is responsible for running update scripts. These automatically
1084                  * update the DB schema whenever we push a new one out. It also checks to see if
1085                  * any addons have been added or removed and reacts accordingly.
1086                  */
1087
1088                 // in install mode, any url loads install module
1089                 // but we need "view" module for stylesheet
1090                 if ($this->getMode()->isInstall() && $this->module != 'view') {
1091                         $this->module = 'install';
1092                 } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
1093                         $this->module = 'maintenance';
1094                 } else {
1095                         $this->checkURL();
1096                         Core\Update::check($this->getBasePath(), false, $this->getMode());
1097                         Core\Addon::loadAddons();
1098                         Core\Hook::loadHooks();
1099                 }
1100
1101                 $this->page = [
1102                         'aside' => '',
1103                         'bottom' => '',
1104                         'content' => '',
1105                         'footer' => '',
1106                         'htmlhead' => '',
1107                         'nav' => '',
1108                         'page_title' => '',
1109                         'right_aside' => '',
1110                         'template' => '',
1111                         'title' => ''
1112                 ];
1113
1114                 if (strlen($this->module)) {
1115                         // Compatibility with the Android Diaspora client
1116                         if ($this->module == 'stream') {
1117                                 $this->internalRedirect('network?f=&order=post');
1118                         }
1119
1120                         if ($this->module == 'conversations') {
1121                                 $this->internalRedirect('message');
1122                         }
1123
1124                         if ($this->module == 'commented') {
1125                                 $this->internalRedirect('network?f=&order=comment');
1126                         }
1127
1128                         if ($this->module == 'liked') {
1129                                 $this->internalRedirect('network?f=&order=comment');
1130                         }
1131
1132                         if ($this->module == 'activity') {
1133                                 $this->internalRedirect('network/?f=&conv=1');
1134                         }
1135
1136                         if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
1137                                 $this->internalRedirect('bookmarklet');
1138                         }
1139
1140                         if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
1141                                 $this->internalRedirect('settings');
1142                         }
1143
1144                         if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
1145                                 $this->internalRedirect('search');
1146                         }
1147
1148                         // Compatibility with the Firefox App
1149                         if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
1150                                 $this->module = "login";
1151                         }
1152
1153                         /*
1154                          * ROUTING
1155                          *
1156                          * From the request URL, routing consists of obtaining the name of a BaseModule-extending class of which the
1157                          * post() and/or content() static methods can be respectively called to produce a data change or an output.
1158                          */
1159
1160                         // First we try explicit routes defined in App\Router
1161                         $this->router->collectRoutes();
1162
1163                         $data = $this->router->getRouteCollector();
1164                         Hook::callAll('route_collection', $data);
1165
1166                         $this->module_class = $this->router->getModuleClass($this->cmd);
1167
1168                         // Then we try addon-provided modules that we wrap in the LegacyModule class
1169                         if (!$this->module_class && Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1170                                 //Check if module is an app and if public access to apps is allowed or not
1171                                 $privateapps = $this->config->get('config', 'private_addons', false);
1172                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1173                                         info(Core\L10n::t("You must be logged in to use addons. "));
1174                                 } else {
1175                                         include_once "addon/{$this->module}/{$this->module}.php";
1176                                         if (function_exists($this->module . '_module')) {
1177                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1178                                                 $this->module_class = 'Friendica\\LegacyModule';
1179                                         }
1180                                 }
1181                         }
1182
1183                         // Then we try name-matching a Friendica\Module class
1184                         if (!$this->module_class && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
1185                                 $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
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                                 $this->module_class = 'Friendica\\LegacyModule';
1194                         }
1195
1196                         /* The URL provided does not resolve to a valid module.
1197                          *
1198                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1199                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1200                          * we are going to trap this and redirect back to the requested page. As long as you don't have a critical error on your page
1201                          * this will often succeed and eventually do the right thing.
1202                          *
1203                          * Otherwise we are going to emit a 404 not found.
1204                          */
1205                         if (!$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: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1217
1218                                 header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
1219                                 $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
1220                                 $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
1221                                         '$message' =>  Core\L10n::t('Page not found.')
1222                                 ]);
1223                         }
1224                 }
1225
1226                 $content = '';
1227
1228                 // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1229                 if ($this->module_class) {
1230                         $this->page['page_title'] = $this->module;
1231                         $placeholder = '';
1232
1233                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1234
1235                         call_user_func([$this->module_class, 'init']);
1236
1237                         // "rawContent" is especially meant for technical endpoints.
1238                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1239                         if (!$this->error) {
1240                                 call_user_func([$this->module_class, 'rawContent']);
1241                         }
1242                 }
1243
1244                 // Load current theme info after module has been initialized as theme could have been set in module
1245                 $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1246                 if (file_exists($theme_info_file)) {
1247                         require_once $theme_info_file;
1248                 }
1249
1250                 if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1251                         $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1252                         $func($this);
1253                 }
1254
1255                 if ($this->module_class) {
1256                         if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
1257                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1258                                 call_user_func([$this->module_class, 'post']);
1259                         }
1260
1261                         if (! $this->error) {
1262                                 Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1263                                 call_user_func([$this->module_class, 'afterpost']);
1264                         }
1265
1266                         if (! $this->error) {
1267                                 $arr = ['content' => $content];
1268                                 Core\Hook::callAll($this->module . '_mod_content', $arr);
1269                                 $content = $arr['content'];
1270                                 $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1271                                 Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1272                                 $content .= $arr['content'];
1273                         }
1274                 }
1275
1276                 // initialise content region
1277                 if ($this->getMode()->isNormal()) {
1278                         Core\Hook::callAll('page_content_top', $this->page['content']);
1279                 }
1280
1281                 $this->page['content'] .= $content;
1282
1283                 /* Create the page head after setting the language
1284                  * and getting any auth credentials.
1285                  *
1286                  * Moved initHead() and initFooter() to after
1287                  * all the module functions have executed so that all
1288                  * theme choices made by the modules can take effect.
1289                  */
1290                 $this->initHead();
1291
1292                 /* Build the page ending -- this is stuff that goes right before
1293                  * the closing </body> tag
1294                  */
1295                 $this->initFooter();
1296
1297                 /* now that we've been through the module content, see if the page reported
1298                  * a permission problem and if so, a 403 response would seem to be in order.
1299                  */
1300                 if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
1301                         header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
1302                 }
1303
1304                 // Report anything which needs to be communicated in the notification area (before the main body)
1305                 Core\Hook::callAll('page_end', $this->page['content']);
1306
1307                 // Add the navigation (menu) template
1308                 if ($this->module != 'install' && $this->module != 'maintenance') {
1309                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1310                         $this->page['nav']       = Content\Nav::build($this);
1311                 }
1312
1313                 // Build the page - now that we have all the components
1314                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1315                         $doc = new DOMDocument();
1316
1317                         $target = new DOMDocument();
1318                         $target->loadXML("<root></root>");
1319
1320                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1321
1322                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1323                         @$doc->loadHTML($content);
1324
1325                         $xpath = new DOMXPath($doc);
1326
1327                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1328
1329                         foreach ($list as $item) {
1330                                 $item = $target->importNode($item, true);
1331
1332                                 // And then append it to the target
1333                                 $target->documentElement->appendChild($item);
1334                         }
1335
1336                         if ($_GET["mode"] == "raw") {
1337                                 header("Content-type: text/html; charset=utf-8");
1338
1339                                 echo substr($target->saveHTML(), 6, -8);
1340
1341                                 exit();
1342                         }
1343                 }
1344
1345                 $page    = $this->page;
1346                 $profile = $this->profile;
1347
1348                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1349                 header("Content-type: text/html; charset=utf-8");
1350
1351                 if ($this->config->get('system', 'hsts') && ($this->baseURL->getSSLPolicy() == BaseUrl::SSL_POLICY_FULL)) {
1352                         header("Strict-Transport-Security: max-age=31536000");
1353                 }
1354
1355                 // Some security stuff
1356                 header('X-Content-Type-Options: nosniff');
1357                 header('X-XSS-Protection: 1; mode=block');
1358                 header('X-Permitted-Cross-Domain-Policies: none');
1359                 header('X-Frame-Options: sameorigin');
1360
1361                 // Things like embedded OSM maps don't work, when this is enabled
1362                 // 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'");
1363
1364                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1365                  * to load another page template than the default one.
1366                  * The page templates are located in /view/php/ or in the theme directory.
1367                  */
1368                 if (isset($_GET["mode"])) {
1369                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1370                 }
1371
1372                 // If there is no page template use the default page template
1373                 if (empty($template)) {
1374                         $template = Core\Theme::getPathForFile("default.php");
1375                 }
1376
1377                 // Theme templates expect $a as an App instance
1378                 $a = $this;
1379
1380                 // Used as is in view/php/default.php
1381                 $lang = Core\L10n::getCurrentLang();
1382
1383                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1384                 require_once $template;
1385         }
1386
1387         /**
1388          * Redirects to another module relative to the current Friendica base.
1389          * If you want to redirect to a external URL, use System::externalRedirectTo()
1390          *
1391          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1392          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1393          *
1394          * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
1395          */
1396         public function internalRedirect($toUrl = '', $ssl = false)
1397         {
1398                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1399                         throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1400                 }
1401
1402                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1403                 Core\System::externalRedirect($redirectTo);
1404         }
1405
1406         /**
1407          * Automatically redirects to relative or absolute URL
1408          * Should only be used if it isn't clear if the URL is either internal or external
1409          *
1410          * @param string $toUrl The target URL
1411          * @throws InternalServerErrorException
1412          */
1413         public function redirect($toUrl)
1414         {
1415                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1416                         Core\System::externalRedirect($toUrl);
1417                 } else {
1418                         $this->internalRedirect($toUrl);
1419                 }
1420         }
1421 }