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 FastRoute\RouteCollector;
  12 use Friendica\Core\Config\Cache\IConfigCache;
  13 use Friendica\Core\Config\Configuration;
  14 use Friendica\Core\Hook;
  15 use Friendica\Core\Theme;
  16 use Friendica\Database\DBA;
  17 use Friendica\Model\Profile;
  18 use Friendica\Network\HTTPException\InternalServerErrorException;
  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 string The App URL path
  83          */
  84         private $urlPath;
  85
  86         /**
  87          * @var bool true, if the call is from the Friendica APP, otherwise false
  88          */
  89         private $isFriendicaApp;
  90
  91         /**
  92          * @var bool true, if the call is from an backend node (f.e. worker)
  93          */
  94         private $isBackend;
  95
  96         /**
  97          * @var string The name of the current theme
  98          */
  99         private $currentTheme;
 100
 101         /**
 102          * @var bool check if request was an AJAX (xmlhttprequest) request
 103          */
 104         private $isAjax;
 105
 106         /**
 107          * @var MobileDetect
 108          */
 109         public $mobileDetect;
 110
 111         /**
 112          * @var Configuration The config
 113          */
 114         private $config;
 115
 116         /**
 117          * @var LoggerInterface The logger
 118          */
 119         private $logger;
 120
 121         /**
 122          * @var Profiler The profiler of this app
 123          */
 124         private $profiler;
 125
 126         /**
 127          * Returns the current config cache of this node
 128          *
 129          * @return IConfigCache
 130          */
 131         public function getConfigCache()
 132         {
 133                 return $this->config->getCache();
 134         }
 135
 136         /**
 137          * The basepath of this app
 138          *
 139          * @return string
 140          */
 141         public function getBasePath()
 142         {
 143                 return $this->config->get('system', 'basepath');
 144         }
 145
 146         /**
 147          * The Logger of this app
 148          *
 149          * @return LoggerInterface
 150          */
 151         public function getLogger()
 152         {
 153                 return $this->logger;
 154         }
 155
 156         /**
 157          * The profiler of this app
 158          *
 159          * @return Profiler
 160          */
 161         public function getProfiler()
 162         {
 163                 return $this->profiler;
 164         }
 165
 166         /**
 167          * Returns the Mode of the Application
 168          *
 169          * @return App\Mode The Application Mode
 170          */
 171         public function getMode()
 172         {
 173                 return $this->mode;
 174         }
 175
 176         /**
 177          * Register a stylesheet file path to be included in the <head> tag of every page.
 178          * Inclusion is done in App->initHead().
 179          * The path can be absolute or relative to the Friendica installation base folder.
 180          *
 181          * @see initHead()
 182          *
 183          * @param string $path
 184          * @throws InternalServerErrorException
 185          */
 186         public function registerStylesheet($path)
 187         {
 188                 if (mb_strpos($path, $this->getBasePath() . DIRECTORY_SEPARATOR) === 0) {
 189                         $path = mb_substr($path, mb_strlen($this->getBasePath() . DIRECTORY_SEPARATOR));
 190                 }
 191
 192                 $this->stylesheets[] = trim($path, '/');
 193         }
 194
 195         /**
 196          * Register a javascript file path to be included in the <footer> tag of every page.
 197          * Inclusion is done in App->initFooter().
 198          * The path can be absolute or relative to the Friendica installation base folder.
 199          *
 200          * @see initFooter()
 201          *
 202          * @param string $path
 203          * @throws InternalServerErrorException
 204          */
 205         public function registerFooterScript($path)
 206         {
 207                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 208
 209                 $this->footerScripts[] = trim($url, '/');
 210         }
 211
 212         public $queue;
 213         private $scheme;
 214         private $hostname;
 215
 216         /**
 217          * @brief App constructor.
 218          *
 219          * @param Configuration    $config    The Configuration
 220          * @param App\Mode         $mode      The mode of this Friendica app
 221          * @param LoggerInterface  $logger    The current app logger
 222          * @param Profiler         $profiler  The profiler of this application
 223          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 224          *
 225          * @throws Exception if the Basepath is not usable
 226          */
 227         public function __construct(Configuration $config, App\Mode $mode, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
 228         {
 229                 BaseObject::setApp($this);
 230
 231                 $this->logger   = $logger;
 232                 $this->config   = $config;
 233                 $this->profiler = $profiler;
 234                 $this->mode     = $mode;
 235
 236                 $this->checkBackend($isBackend);
 237                 $this->checkFriendicaApp();
 238
 239                 $this->profiler->reset();
 240
 241                 $this->reload();
 242
 243                 set_time_limit(0);
 244
 245                 // This has to be quite large to deal with embedded private photos
 246                 ini_set('pcre.backtrack_limit', 500000);
 247
 248                 $this->scheme = 'http';
 249
 250                 if (!empty($_SERVER['HTTPS']) ||
 251                         !empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
 252                         !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
 253                         !empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
 254                         !empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
 255                         !empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
 256                 ) {
 257                         $this->scheme = 'https';
 258                 }
 259
 260                 if (!empty($_SERVER['SERVER_NAME'])) {
 261                         $this->hostname = $_SERVER['SERVER_NAME'];
 262
 263                         if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
 264                                 $this->hostname .= ':' . $_SERVER['SERVER_PORT'];
 265                         }
 266                 }
 267
 268                 set_include_path(
 269                         get_include_path() . PATH_SEPARATOR
 270                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 271                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 272                         . $this->getBasePath());
 273
 274                 if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
 275                         $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
 276                 } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
 277                         $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
 278                 }
 279
 280                 // removing trailing / - maybe a nginx problem
 281                 $this->query_string = ltrim($this->query_string, '/');
 282
 283                 if (!empty($_GET['pagename'])) {
 284                         $this->cmd = trim($_GET['pagename'], '/\\');
 285                 } elseif (!empty($_GET['q'])) {
 286                         $this->cmd = trim($_GET['q'], '/\\');
 287                 }
 288
 289                 // fix query_string
 290                 $this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
 291
 292                 // unix style "homedir"
 293                 if (substr($this->cmd, 0, 1) === '~') {
 294                         $this->cmd = 'profile/' . substr($this->cmd, 1);
 295                 }
 296
 297                 // Diaspora style profile url
 298                 if (substr($this->cmd, 0, 2) === 'u/') {
 299                         $this->cmd = 'profile/' . substr($this->cmd, 2);
 300                 }
 301
 302                 /*
 303                  * Break the URL path into C style argc/argv style arguments for our
 304                  * modules. Given "http://example.com/module/arg1/arg2", $this->argc
 305                  * will be 3 (integer) and $this->argv will contain:
 306                  *   [0] => 'module'
 307                  *   [1] => 'arg1'
 308                  *   [2] => 'arg2'
 309                  *
 310                  *
 311                  * There will always be one argument. If provided a naked domain
 312                  * URL, $this->argv[0] is set to "home".
 313                  */
 314
 315                 $this->argv = explode('/', $this->cmd);
 316                 $this->argc = count($this->argv);
 317                 if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
 318                         $this->module = str_replace('.', '_', $this->argv[0]);
 319                         $this->module = str_replace('-', '_', $this->module);
 320                 } else {
 321                         $this->argc = 1;
 322                         $this->argv = ['home'];
 323                         $this->module = 'home';
 324                 }
 325
 326                 // Detect mobile devices
 327                 $mobile_detect = new MobileDetect();
 328
 329                 $this->mobileDetect = $mobile_detect;
 330
 331                 $this->is_mobile = $mobile_detect->isMobile();
 332                 $this->is_tablet = $mobile_detect->isTablet();
 333
 334                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 335
 336                 // Register template engines
 337                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 338         }
 339
 340         /**
 341          * Reloads the whole app instance
 342          */
 343         public function reload()
 344         {
 345                 $this->determineURLPath();
 346
 347                 $this->getMode()->determine($this->getBasePath());
 348
 349                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 350                         $loader = new ConfigFileLoader($this->getBasePath(), $this->getMode());
 351                         $this->config->getCache()->load($loader->loadCoreConfig('addon'), true);
 352
 353                         $this->profiler->update(
 354                                 $this->config->get('system', 'profiler', false),
 355                                 $this->config->get('rendertime', 'callstack', false));
 356
 357                         Core\Hook::loadHooks();
 358                         $loader = new ConfigFileLoader($this->getBasePath(), $this->mode);
 359                         Core\Hook::callAll('load_config', $loader);
 360                 }
 361
 362                 $this->loadDefaultTimezone();
 363
 364                 Core\L10n::init();
 365         }
 366
 367         /**
 368          * Loads the default timezone
 369          *
 370          * Include support for legacy $default_timezone
 371          *
 372          * @global string $default_timezone
 373          */
 374         private function loadDefaultTimezone()
 375         {
 376                 if ($this->config->get('system', 'default_timezone')) {
 377                         $this->timezone = $this->config->get('system', 'default_timezone');
 378                 } else {
 379                         global $default_timezone;
 380                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 381                 }
 382
 383                 if ($this->timezone) {
 384                         date_default_timezone_set($this->timezone);
 385                 }
 386         }
 387
 388         /**
 389          * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
 390          */
 391         private function determineURLPath()
 392         {
 393                 /*
 394                  * The automatic path detection in this function is currently deactivated,
 395                  * see issue https://github.com/friendica/friendica/issues/6679
 396                  *
 397                  * The problem is that the function seems to be confused with some url.
 398                  * These then confuses the detection which changes the url path.
 399                  */
 400
 401                 /* Relative script path to the web server root
 402                  * Not all of those $_SERVER properties can be present, so we do by inverse priority order
 403                  */
 404 /*
 405                 $relative_script_path = '';
 406                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
 407                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
 408                 $relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
 409                 $relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
 410                 $relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
 411 */
 412                 $this->urlPath = $this->config->get('system', 'urlpath');
 413
 414                 /* $relative_script_path gives /relative/path/to/friendica/module/parameter
 415                  * QUERY_STRING gives pagename=module/parameter
 416                  *
 417                  * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
 418                  */
 419 /*
 420                 if (!empty($relative_script_path)) {
 421                         // Module
 422                         if (!empty($_SERVER['QUERY_STRING'])) {
 423                                 $path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
 424                         } else {
 425                                 // Root page
 426                                 $path = trim($relative_script_path, '/');
 427                         }
 428
 429                         if ($path && $path != $this->urlPath) {
 430                                 $this->urlPath = $path;
 431                         }
 432                 }
 433 */
 434         }
 435
 436         public function getScheme()
 437         {
 438                 return $this->scheme;
 439         }
 440
 441         /**
 442          * @brief Retrieves the Friendica instance base URL
 443          *
 444          * This function assembles the base URL from multiple parts:
 445          * - Protocol is determined either by the request or a combination of
 446          * system.ssl_policy and the $ssl parameter.
 447          * - Host name is determined either by system.hostname or inferred from request
 448          * - Path is inferred from SCRIPT_NAME
 449          *
 450          * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
 451          *
 452          * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
 453          * @return string Friendica server base URL
 454          * @throws InternalServerErrorException
 455          */
 456         public function getBaseURL($ssl = false)
 457         {
 458                 $scheme = $this->scheme;
 459
 460                 if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL) {
 461                         $scheme = 'https';
 462                 }
 463
 464                 //      Basically, we have $ssl = true on any links which can only be seen by a logged in user
 465                 //      (and also the login link). Anything seen by an outsider will have it turned off.
 466
 467                 if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
 468                         if ($ssl) {
 469                                 $scheme = 'https';
 470                         } else {
 471                                 $scheme = 'http';
 472                         }
 473                 }
 474
 475                 if ($this->config->get('config', 'hostname') != '') {
 476                         $this->hostname = $this->config->get('config', 'hostname');
 477                 }
 478
 479                 return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
 480         }
 481
 482         /**
 483          * @brief Initializes the baseurl components
 484          *
 485          * Clears the baseurl cache to prevent inconsistencies
 486          *
 487          * @param string $url
 488          * @throws InternalServerErrorException
 489          */
 490         public function setBaseURL($url)
 491         {
 492                 $parsed = @parse_url($url);
 493                 $hostname = '';
 494
 495                 if (!empty($parsed)) {
 496                         if (!empty($parsed['scheme'])) {
 497                                 $this->scheme = $parsed['scheme'];
 498                         }
 499
 500                         if (!empty($parsed['host'])) {
 501                                 $hostname = $parsed['host'];
 502                         }
 503
 504                         if (!empty($parsed['port'])) {
 505                                 $hostname .= ':' . $parsed['port'];
 506                         }
 507                         if (!empty($parsed['path'])) {
 508                                 $this->urlPath = trim($parsed['path'], '\\/');
 509                         }
 510
 511                         if (file_exists($this->getBasePath() . '/.htpreconfig.php')) {
 512                                 include $this->getBasePath() . '/.htpreconfig.php';
 513                         }
 514
 515                         if ($this->config->get('config', 'hostname') != '') {
 516                                 $this->hostname = $this->config->get('config', 'hostname');
 517                         }
 518
 519                         if (!isset($this->hostname) || ($this->hostname == '')) {
 520                                 $this->hostname = $hostname;
 521                         }
 522                 }
 523         }
 524
 525         public function getHostName()
 526         {
 527                 if ($this->config->get('config', 'hostname') != '') {
 528                         $this->hostname = $this->config->get('config', 'hostname');
 529                 }
 530
 531                 return $this->hostname;
 532         }
 533
 534         public function getURLPath()
 535         {
 536                 return $this->urlPath;
 537         }
 538
 539         /**
 540          * Initializes App->page['htmlhead'].
 541          *
 542          * Includes:
 543          * - Page title
 544          * - Favicons
 545          * - Registered stylesheets (through App->registerStylesheet())
 546          * - Infinite scroll data
 547          * - head.tpl template
 548          */
 549         public function initHead()
 550         {
 551                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 552
 553                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 554                 if ($interval < 0) {
 555                         $interval = 2147483647;
 556                 }
 557
 558                 if ($interval < 10000) {
 559                         $interval = 40000;
 560                 }
 561
 562                 // Default title: current module called
 563                 if (empty($this->page['title']) && $this->module) {
 564                         $this->page['title'] = ucfirst($this->module);
 565                 }
 566
 567                 // Prepend the sitename to the page title
 568                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 569
 570                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 571                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 572                 } else {
 573                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 574                 }
 575
 576                 $this->registerStylesheet($stylesheet);
 577
 578                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 579                 if ($shortcut_icon == '') {
 580                         $shortcut_icon = 'images/friendica-32.png';
 581                 }
 582
 583                 $touch_icon = $this->config->get('system', 'touch_icon');
 584                 if ($touch_icon == '') {
 585                         $touch_icon = 'images/friendica-128.png';
 586                 }
 587
 588                 Core\Hook::callAll('head', $this->page['htmlhead']);
 589
 590                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 591                 /* put the head template at the beginning of page['htmlhead']
 592                  * since the code added by the modules frequently depends on it
 593                  * being first
 594                  */
 595                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 596                         '$baseurl'         => $this->getBaseURL(),
 597                         '$local_user'      => local_user(),
 598                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 599                         '$delitem'         => Core\L10n::t('Delete this item?'),
 600                         '$update_interval' => $interval,
 601                         '$shortcut_icon'   => $shortcut_icon,
 602                         '$touch_icon'      => $touch_icon,
 603                         '$block_public'    => intval($this->config->get('system', 'block_public')),
 604                         '$stylesheets'     => $this->stylesheets,
 605                 ]) . $this->page['htmlhead'];
 606         }
 607
 608         /**
 609          * Initializes App->page['footer'].
 610          *
 611          * Includes:
 612          * - Javascript homebase
 613          * - Mobile toggle link
 614          * - Registered footer scripts (through App->registerFooterScript())
 615          * - footer.tpl template
 616          */
 617         public function initFooter()
 618         {
 619                 // If you're just visiting, let javascript take you home
 620                 if (!empty($_SESSION['visitor_home'])) {
 621                         $homebase = $_SESSION['visitor_home'];
 622                 } elseif (local_user()) {
 623                         $homebase = 'profile/' . $this->user['nickname'];
 624                 }
 625
 626                 if (isset($homebase)) {
 627                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 628                 }
 629
 630                 /*
 631                  * Add a "toggle mobile" link if we're using a mobile device
 632                  */
 633                 if ($this->is_mobile || $this->is_tablet) {
 634                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 635                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 636                         } else {
 637                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 638                         }
 639                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 640                                 '$toggle_link' => $link,
 641                                 '$toggle_text' => Core\L10n::t('toggle mobile')
 642                         ]);
 643                 }
 644
 645                 Core\Hook::callAll('footer', $this->page['footer']);
 646
 647                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 648                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 649                         '$baseurl' => $this->getBaseURL(),
 650                         '$footerScripts' => $this->footerScripts,
 651                 ]) . $this->page['footer'];
 652         }
 653
 654         /**
 655          * @brief Removes the base url from an url. This avoids some mixed content problems.
 656          *
 657          * @param string $origURL
 658          *
 659          * @return string The cleaned url
 660          * @throws InternalServerErrorException
 661          */
 662         public function removeBaseURL($origURL)
 663         {
 664                 // Remove the hostname from the url if it is an internal link
 665                 $nurl = Util\Strings::normaliseLink($origURL);
 666                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 667                 $url = str_replace($base . '/', '', $nurl);
 668
 669                 // if it is an external link return the orignal value
 670                 if ($url == Util\Strings::normaliseLink($origURL)) {
 671                         return $origURL;
 672                 } else {
 673                         return $url;
 674                 }
 675         }
 676
 677         /**
 678          * Returns the current UserAgent as a String
 679          *
 680          * @return string the UserAgent as a String
 681          * @throws InternalServerErrorException
 682          */
 683         public function getUserAgent()
 684         {
 685                 return
 686                         FRIENDICA_PLATFORM . " '" .
 687                         FRIENDICA_CODENAME . "' " .
 688                         FRIENDICA_VERSION . '-' .
 689                         DB_UPDATE_VERSION . '; ' .
 690                         $this->getBaseURL();
 691         }
 692
 693         /**
 694          * Checks, if the call is from the Friendica App
 695          *
 696          * Reason:
 697          * The friendica client has problems with the GUID in the notify. this is some workaround
 698          */
 699         private function checkFriendicaApp()
 700         {
 701                 // Friendica-Client
 702                 $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
 703         }
 704
 705         /**
 706          *      Is the call via the Friendica app? (not a "normale" call)
 707          *
 708          * @return bool true if it's from the Friendica app
 709          */
 710         public function isFriendicaApp()
 711         {
 712                 return $this->isFriendicaApp;
 713         }
 714
 715         /**
 716          * @brief Checks if the site is called via a backend process
 717          *
 718          * This isn't a perfect solution. But we need this check very early.
 719          * So we cannot wait until the modules are loaded.
 720          *
 721          * @param string $backend true, if the backend flag was set during App initialization
 722          *
 723          */
 724         private function checkBackend($backend) {
 725                 static $backends = [
 726                         '_well_known',
 727                         'api',
 728                         'dfrn_notify',
 729                         'fetch',
 730                         'hcard',
 731                         'hostxrd',
 732                         'manifest',
 733                         'nodeinfo',
 734                         'noscrape',
 735                         'p',
 736                         'poco',
 737                         'post',
 738                         'proxy',
 739                         'pubsub',
 740                         'pubsubhubbub',
 741                         'receive',
 742                         'rsd_xml',
 743                         'salmon',
 744                         'statistics_json',
 745                         'xrd',
 746                 ];
 747
 748                 // Check if current module is in backend or backend flag is set
 749                 $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
 750         }
 751
 752         /**
 753          * Returns true, if the call is from a backend node (f.e. from a worker)
 754          *
 755          * @return bool Is it a known backend?
 756          */
 757         public function isBackend()
 758         {
 759                 return $this->isBackend;
 760         }
 761
 762         /**
 763          * @brief Checks if the maximum number of database processes is reached
 764          *
 765          * @return bool Is the limit reached?
 766          */
 767         public function isMaxProcessesReached()
 768         {
 769                 // Deactivated, needs more investigating if this check really makes sense
 770                 return false;
 771
 772                 /*
 773                  * Commented out to suppress static analyzer issues
 774                  *
 775                 if ($this->is_backend()) {
 776                         $process = 'backend';
 777                         $max_processes = $this->config->get('system', 'max_processes_backend');
 778                         if (intval($max_processes) == 0) {
 779                                 $max_processes = 5;
 780                         }
 781                 } else {
 782                         $process = 'frontend';
 783                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 784                         if (intval($max_processes) == 0) {
 785                                 $max_processes = 20;
 786                         }
 787                 }
 788
 789                 $processlist = DBA::processlist();
 790                 if ($processlist['list'] != '') {
 791                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 792
 793                         if ($processlist['amount'] > $max_processes) {
 794                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 795                                 return true;
 796                         }
 797                 }
 798                 return false;
 799                  */
 800         }
 801
 802         /**
 803          * @brief Checks if the minimal memory is reached
 804          *
 805          * @return bool Is the memory limit reached?
 806          * @throws InternalServerErrorException
 807          */
 808         public function isMinMemoryReached()
 809         {
 810                 $min_memory = $this->config->get('system', 'min_memory', 0);
 811                 if ($min_memory == 0) {
 812                         return false;
 813                 }
 814
 815                 if (!is_readable('/proc/meminfo')) {
 816                         return false;
 817                 }
 818
 819                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 820
 821                 $meminfo = [];
 822                 foreach ($memdata as $line) {
 823                         $data = explode(':', $line);
 824                         if (count($data) != 2) {
 825                                 continue;
 826                         }
 827                         list($key, $val) = $data;
 828                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 829                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 830                 }
 831
 832                 if (!isset($meminfo['MemFree'])) {
 833                         return false;
 834                 }
 835
 836                 $free = $meminfo['MemFree'];
 837
 838                 $reached = ($free < $min_memory);
 839
 840                 if ($reached) {
 841                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 842                 }
 843
 844                 return $reached;
 845         }
 846
 847         /**
 848          * @brief Checks if the maximum load is reached
 849          *
 850          * @return bool Is the load reached?
 851          * @throws InternalServerErrorException
 852          */
 853         public function isMaxLoadReached()
 854         {
 855                 if ($this->isBackend()) {
 856                         $process = 'backend';
 857                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 858                         if ($maxsysload < 1) {
 859                                 $maxsysload = 50;
 860                         }
 861                 } else {
 862                         $process = 'frontend';
 863                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 864                         if ($maxsysload < 1) {
 865                                 $maxsysload = 50;
 866                         }
 867                 }
 868
 869                 $load = Core\System::currentLoad();
 870                 if ($load) {
 871                         if (intval($load) > $maxsysload) {
 872                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 873                                 return true;
 874                         }
 875                 }
 876                 return false;
 877         }
 878
 879         /**
 880          * Executes a child process with 'proc_open'
 881          *
 882          * @param string $command The command to execute
 883          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 884          * @throws InternalServerErrorException
 885          */
 886         public function proc_run($command, $args)
 887         {
 888                 if (!function_exists('proc_open')) {
 889                         return;
 890                 }
 891
 892                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 893
 894                 foreach ($args as $key => $value) {
 895                         if (!is_null($value) && is_bool($value) && !$value) {
 896                                 continue;
 897                         }
 898
 899                         $cmdline .= ' --' . $key;
 900                         if (!is_null($value) && !is_bool($value)) {
 901                                 $cmdline .= ' ' . $value;
 902                         }
 903                 }
 904
 905                 if ($this->isMinMemoryReached()) {
 906                         return;
 907                 }
 908
 909                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 910                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 911                 } else {
 912                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 913                 }
 914                 if (!is_resource($resource)) {
 915                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 916                         return;
 917                 }
 918                 proc_close($resource);
 919         }
 920
 921         /**
 922          * Generates the site's default sender email address
 923          *
 924          * @return string
 925          * @throws InternalServerErrorException
 926          */
 927         public function getSenderEmailAddress()
 928         {
 929                 $sender_email = $this->config->get('config', 'sender_email');
 930                 if (empty($sender_email)) {
 931                         $hostname = $this->getHostName();
 932                         if (strpos($hostname, ':')) {
 933                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 934                         }
 935
 936                         $sender_email = 'noreply@' . $hostname;
 937                 }
 938
 939                 return $sender_email;
 940         }
 941
 942         /**
 943          * Returns the current theme name.
 944          *
 945          * @return string the name of the current theme
 946          * @throws InternalServerErrorException
 947          */
 948         public function getCurrentTheme()
 949         {
 950                 if ($this->getMode()->isInstall()) {
 951                         return '';
 952                 }
 953
 954                 if (!$this->currentTheme) {
 955                         $this->computeCurrentTheme();
 956                 }
 957
 958                 return $this->currentTheme;
 959         }
 960
 961         public function setCurrentTheme($theme)
 962         {
 963                 $this->currentTheme = $theme;
 964         }
 965
 966         /**
 967          * Computes the current theme name based on the node settings, the user settings and the device type
 968          *
 969          * @throws Exception
 970          */
 971         private function computeCurrentTheme()
 972         {
 973                 $system_theme = $this->config->get('system', 'theme');
 974                 if (!$system_theme) {
 975                         throw new Exception(Core\L10n::t('No system theme config value set.'));
 976                 }
 977
 978                 // Sane default
 979                 $this->currentTheme = $system_theme;
 980
 981                 $page_theme = null;
 982                 // Find the theme that belongs to the user whose stuff we are looking at
 983                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 984                         // Allow folks to override user themes and always use their own on their own site.
 985                         // This works only if the user is on the same server
 986                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 987                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 988                                 $page_theme = $user['theme'];
 989                         }
 990                 }
 991
 992                 $user_theme = Core\Session::get('theme', $system_theme);
 993
 994                 // Specific mobile theme override
 995                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 996                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 997                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 998
 999                         // --- means same mobile theme as desktop
1000                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
1001                                 $user_theme = $user_mobile_theme;
1002                         }
1003                 }
1004
1005                 if ($page_theme) {
1006                         $theme_name = $page_theme;
1007                 } else {
1008                         $theme_name = $user_theme;
1009                 }
1010
1011                 $theme_name = Strings::sanitizeFilePathItem($theme_name);
1012                 if ($theme_name
1013                         && in_array($theme_name, Theme::getAllowedList())
1014                         && (file_exists('view/theme/' . $theme_name . '/style.css')
1015                         || file_exists('view/theme/' . $theme_name . '/style.php'))
1016                 ) {
1017                         $this->currentTheme = $theme_name;
1018                 }
1019         }
1020
1021         /**
1022          * @brief Return full URL to theme which is currently in effect.
1023          *
1024          * Provide a sane default if nothing is chosen or the specified theme does not exist.
1025          *
1026          * @return string
1027          * @throws InternalServerErrorException
1028          */
1029         public function getCurrentThemeStylesheetPath()
1030         {
1031                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
1032         }
1033
1034         /**
1035          * Check if request was an AJAX (xmlhttprequest) request.
1036          *
1037          * @return boolean true if it was an AJAX request
1038          */
1039         public function isAjax()
1040         {
1041                 return $this->isAjax;
1042         }
1043
1044         /**
1045          * Returns the value of a argv key
1046          * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
1047          *
1048          * @param int $position the position of the argument
1049          * @param mixed $default the default value if not found
1050          *
1051          * @return mixed returns the value of the argument
1052          */
1053         public function getArgumentValue($position, $default = '')
1054         {
1055                 if (array_key_exists($position, $this->argv)) {
1056                         return $this->argv[$position];
1057                 }
1058
1059                 return $default;
1060         }
1061
1062         /**
1063          * Sets the base url for use in cmdline programs which don't have
1064          * $_SERVER variables
1065          */
1066         public function checkURL()
1067         {
1068                 $url = $this->config->get('system', 'url');
1069
1070                 // if the url isn't set or the stored url is radically different
1071                 // than the currently visited url, store the current value accordingly.
1072                 // "Radically different" ignores common variations such as http vs https
1073                 // and www.example.com vs example.com.
1074                 // We will only change the url to an ip address if there is no existing setting
1075
1076                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->getHostName()))) {
1077                         $this->config->set('system', 'url', $this->getBaseURL());
1078                 }
1079         }
1080
1081         /**
1082          * Frontend App script
1083          *
1084          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
1085          * request and a representation of the response.
1086          *
1087          * This probably should change to limit the size of this monster method.
1088          */
1089         public function runFrontend()
1090         {
1091                 // Missing DB connection: ERROR
1092                 if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
1093                         Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
1094                 }
1095
1096                 // Max Load Average reached: ERROR
1097                 if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
1098                         header('Retry-After: 120');
1099                         header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
1100
1101                         Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
1102                 }
1103
1104                 if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
1105                         Core\System::httpExit(404);
1106                 }
1107
1108                 if (!$this->getMode()->isInstall()) {
1109                         // Force SSL redirection
1110                         if ($this->config->get('system', 'force_ssl') && ($this->getScheme() == "http")
1111                                 && intval($this->config->get('system', 'ssl_policy')) == SSL_POLICY_FULL
1112                                 && strpos($this->getBaseURL(), 'https://') === 0
1113                                 && $_SERVER['REQUEST_METHOD'] == 'GET') {
1114                                 header('HTTP/1.1 302 Moved Temporarily');
1115                                 header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
1116                                 exit();
1117                         }
1118
1119                         Core\Session::init();
1120                         Core\Hook::callAll('init_1');
1121                 }
1122
1123                 // Exclude the backend processes from the session management
1124                 if (!$this->isBackend()) {
1125                         $stamp1 = microtime(true);
1126                         session_start();
1127                         $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
1128                         Core\L10n::setSessionVariable();
1129                         Core\L10n::setLangFromSession();
1130                 } else {
1131                         $_SESSION = [];
1132                         Core\Worker::executeIfIdle();
1133                 }
1134
1135                 if ($this->getMode()->isNormal()) {
1136                         $requester = HTTPSignature::getSigner('', $_SERVER);
1137                         if (!empty($requester)) {
1138                                 Profile::addVisitorCookieForHandle($requester);
1139                         }
1140                 }
1141
1142                 // ZRL
1143                 if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
1144                         $this->query_string = Model\Profile::stripZrls($this->query_string);
1145                         if (!local_user()) {
1146                                 // Only continue when the given profile link seems valid
1147                                 // Valid profile links contain a path with "/profile/" and no query parameters
1148                                 if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
1149                                         strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
1150                                         if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
1151                                                 $_SESSION['my_url'] = $_GET['zrl'];
1152                                                 $_SESSION['authenticated'] = 0;
1153                                         }
1154                                         Model\Profile::zrlInit($this);
1155                                 } else {
1156                                         // Someone came with an invalid parameter, maybe as a DDoS attempt
1157                                         // We simply stop processing here
1158                                         Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
1159                                         Core\System::httpExit(403, ['title' => '403 Forbidden']);
1160                                 }
1161                         }
1162                 }
1163
1164                 if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
1165                         $token = $_GET['owt'];
1166                         $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
1167                         Model\Profile::openWebAuthInit($token);
1168                 }
1169
1170                 Module\Login::sessionAuth();
1171
1172                 if (empty($_SESSION['authenticated'])) {
1173                         header('X-Account-Management-Status: none');
1174                 }
1175
1176                 $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
1177                 $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
1178                 $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
1179
1180                 /*
1181                  * check_config() is responsible for running update scripts. These automatically
1182                  * update the DB schema whenever we push a new one out. It also checks to see if
1183                  * any addons have been added or removed and reacts accordingly.
1184                  */
1185
1186                 // in install mode, any url loads install module
1187                 // but we need "view" module for stylesheet
1188                 if ($this->getMode()->isInstall() && $this->module != 'view') {
1189                         $this->module = 'install';
1190                 } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
1191                         $this->module = 'maintenance';
1192                 } else {
1193                         $this->checkURL();
1194                         Core\Update::check($this->getBasePath(), false, $this->getMode());
1195                         Core\Addon::loadAddons();
1196                         Core\Hook::loadHooks();
1197                 }
1198
1199                 $this->page = [
1200                         'aside' => '',
1201                         'bottom' => '',
1202                         'content' => '',
1203                         'footer' => '',
1204                         'htmlhead' => '',
1205                         'nav' => '',
1206                         'page_title' => '',
1207                         'right_aside' => '',
1208                         'template' => '',
1209                         'title' => ''
1210                 ];
1211
1212                 if (strlen($this->module)) {
1213                         // Compatibility with the Android Diaspora client
1214                         if ($this->module == 'stream') {
1215                                 $this->internalRedirect('network?f=&order=post');
1216                         }
1217
1218                         if ($this->module == 'conversations') {
1219                                 $this->internalRedirect('message');
1220                         }
1221
1222                         if ($this->module == 'commented') {
1223                                 $this->internalRedirect('network?f=&order=comment');
1224                         }
1225
1226                         if ($this->module == 'liked') {
1227                                 $this->internalRedirect('network?f=&order=comment');
1228                         }
1229
1230                         if ($this->module == 'activity') {
1231                                 $this->internalRedirect('network/?f=&conv=1');
1232                         }
1233
1234                         if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
1235                                 $this->internalRedirect('bookmarklet');
1236                         }
1237
1238                         if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
1239                                 $this->internalRedirect('settings');
1240                         }
1241
1242                         if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
1243                                 $this->internalRedirect('search');
1244                         }
1245
1246                         // Compatibility with the Firefox App
1247                         if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
1248                                 $this->module = "login";
1249                         }
1250
1251                         $router = new App\Router();
1252                         $this->collectRoutes($router->routeCollector);
1253
1254                         $this->module_class = $router->getModuleClass($this->cmd);
1255
1256                         $privateapps = $this->config->get('config', 'private_addons', false);
1257                         if (!$this->module_class && Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1258                                 //Check if module is an app and if public access to apps is allowed or not
1259                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1260                                         info(Core\L10n::t("You must be logged in to use addons. "));
1261                                 } else {
1262                                         include_once "addon/{$this->module}/{$this->module}.php";
1263                                         if (function_exists($this->module . '_module')) {
1264                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1265                                                 $this->module_class = 'Friendica\\LegacyModule';
1266                                         }
1267                                 }
1268                         }
1269
1270                         // Controller class routing
1271                         if (!$this->module_class && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
1272                                 $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
1273                         }
1274
1275                         /* If not, next look for a 'standard' program module in the 'mod' directory
1276                          * We emulate a Module class through the LegacyModule class
1277                          */
1278                         if (!$this->module_class && file_exists("mod/{$this->module}.php")) {
1279                                 LegacyModule::setModuleFile("mod/{$this->module}.php");
1280                                 $this->module_class = 'Friendica\\LegacyModule';
1281                         }
1282
1283                         /* The URL provided does not resolve to a valid module.
1284                          *
1285                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1286                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1287                          * we are going to trap this and redirect back to the requested page. As long as you don't have a critical error on your page
1288                          * this will often succeed and eventually do the right thing.
1289                          *
1290                          * Otherwise we are going to emit a 404 not found.
1291                          */
1292                         if (!$this->module_class) {
1293                                 // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
1294                                 if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
1295                                         exit();
1296                                 }
1297
1298                                 if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
1299                                         Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
1300                                         $this->internalRedirect($_SERVER['REQUEST_URI']);
1301                                 }
1302
1303                                 Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1304
1305                                 header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
1306                                 $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
1307                                 $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
1308                                         '$message' =>  Core\L10n::t('Page not found.')
1309                                 ]);
1310                         }
1311                 }
1312
1313                 $content = '';
1314
1315                 // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1316                 if ($this->module_class) {
1317                         $this->page['page_title'] = $this->module;
1318                         $placeholder = '';
1319
1320                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1321
1322                         call_user_func([$this->module_class, 'init']);
1323
1324                         // "rawContent" is especially meant for technical endpoints.
1325                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1326                         if (!$this->error) {
1327                                 call_user_func([$this->module_class, 'rawContent']);
1328                         }
1329                 }
1330
1331                 // Load current theme info after module has been initialized as theme could have been set in module
1332                 $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1333                 if (file_exists($theme_info_file)) {
1334                         require_once $theme_info_file;
1335                 }
1336
1337                 if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1338                         $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1339                         $func($this);
1340                 }
1341
1342                 if ($this->module_class) {
1343                         if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
1344                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1345                                 call_user_func([$this->module_class, 'post']);
1346                         }
1347
1348                         if (! $this->error) {
1349                                 Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1350                                 call_user_func([$this->module_class, 'afterpost']);
1351                         }
1352
1353                         if (! $this->error) {
1354                                 $arr = ['content' => $content];
1355                                 Core\Hook::callAll($this->module . '_mod_content', $arr);
1356                                 $content = $arr['content'];
1357                                 $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1358                                 Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1359                                 $content .= $arr['content'];
1360                         }
1361                 }
1362
1363                 // initialise content region
1364                 if ($this->getMode()->isNormal()) {
1365                         Core\Hook::callAll('page_content_top', $this->page['content']);
1366                 }
1367
1368                 $this->page['content'] .= $content;
1369
1370                 /* Create the page head after setting the language
1371                  * and getting any auth credentials.
1372                  *
1373                  * Moved initHead() and initFooter() to after
1374                  * all the module functions have executed so that all
1375                  * theme choices made by the modules can take effect.
1376                  */
1377                 $this->initHead();
1378
1379                 /* Build the page ending -- this is stuff that goes right before
1380                  * the closing </body> tag
1381                  */
1382                 $this->initFooter();
1383
1384                 /* now that we've been through the module content, see if the page reported
1385                  * a permission problem and if so, a 403 response would seem to be in order.
1386                  */
1387                 if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
1388                         header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
1389                 }
1390
1391                 // Report anything which needs to be communicated in the notification area (before the main body)
1392                 Core\Hook::callAll('page_end', $this->page['content']);
1393
1394                 // Add the navigation (menu) template
1395                 if ($this->module != 'install' && $this->module != 'maintenance') {
1396                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1397                         $this->page['nav']       = Content\Nav::build($this);
1398                 }
1399
1400                 // Build the page - now that we have all the components
1401                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1402                         $doc = new DOMDocument();
1403
1404                         $target = new DOMDocument();
1405                         $target->loadXML("<root></root>");
1406
1407                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1408
1409                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1410                         @$doc->loadHTML($content);
1411
1412                         $xpath = new DOMXPath($doc);
1413
1414                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1415
1416                         foreach ($list as $item) {
1417                                 $item = $target->importNode($item, true);
1418
1419                                 // And then append it to the target
1420                                 $target->documentElement->appendChild($item);
1421                         }
1422
1423                         if ($_GET["mode"] == "raw") {
1424                                 header("Content-type: text/html; charset=utf-8");
1425
1426                                 echo substr($target->saveHTML(), 6, -8);
1427
1428                                 exit();
1429                         }
1430                 }
1431
1432                 $page    = $this->page;
1433                 $profile = $this->profile;
1434
1435                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1436                 header("Content-type: text/html; charset=utf-8");
1437
1438                 if ($this->config->get('system', 'hsts') && ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
1439                         header("Strict-Transport-Security: max-age=31536000");
1440                 }
1441
1442                 // Some security stuff
1443                 header('X-Content-Type-Options: nosniff');
1444                 header('X-XSS-Protection: 1; mode=block');
1445                 header('X-Permitted-Cross-Domain-Policies: none');
1446                 header('X-Frame-Options: sameorigin');
1447
1448                 // Things like embedded OSM maps don't work, when this is enabled
1449                 // 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'");
1450
1451                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1452                  * to load another page template than the default one.
1453                  * The page templates are located in /view/php/ or in the theme directory.
1454                  */
1455                 if (isset($_GET["mode"])) {
1456                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1457                 }
1458
1459                 // If there is no page template use the default page template
1460                 if (empty($template)) {
1461                         $template = Core\Theme::getPathForFile("default.php");
1462                 }
1463
1464                 // Theme templates expect $a as an App instance
1465                 $a = $this;
1466
1467                 // Used as is in view/php/default.php
1468                 $lang = Core\L10n::getCurrentLang();
1469
1470                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1471                 require_once $template;
1472         }
1473
1474         /**
1475          * Redirects to another module relative to the current Friendica base.
1476          * If you want to redirect to a external URL, use System::externalRedirectTo()
1477          *
1478          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1479          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1480          *
1481          * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
1482          */
1483         public function internalRedirect($toUrl = '', $ssl = false)
1484         {
1485                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1486                         throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1487                 }
1488
1489                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1490                 Core\System::externalRedirect($redirectTo);
1491         }
1492
1493         /**
1494          * Automatically redirects to relative or absolute URL
1495          * Should only be used if it isn't clear if the URL is either internal or external
1496          *
1497          * @param string $toUrl The target URL
1498          * @throws InternalServerErrorException
1499          */
1500         public function redirect($toUrl)
1501         {
1502                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1503                         Core\System::externalRedirect($toUrl);
1504                 } else {
1505                         $this->internalRedirect($toUrl);
1506                 }
1507         }
1508
1509         /**
1510          * @brief Static declaration of Friendica routes.
1511          *
1512          * Supports:
1513          * - Route groups
1514          * - Variable parts
1515          * Disregards:
1516          * - HTTP method other than GET
1517          * - Named parameters
1518          *
1519          * Handler must be the name of a class extending Friendica\BaseModule.
1520          *
1521          * @param RouteCollector $routeCollector
1522          * @throws InternalServerErrorException
1523          */
1524         private function collectRoutes(RouteCollector $routeCollector)
1525         {
1526                 Hook::callAll('route_collection', $routeCollector);
1527         }
1528 }