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\Database\DBA;
  14 use Friendica\Model\Profile;
  15 use Friendica\Network\HTTPException\InternalServerErrorException;
  16 use Friendica\Util\Config\ConfigFileLoader;
  17 use Friendica\Util\HTTPSignature;
  18 use Friendica\Util\Profiler;
  19 use Psr\Log\LoggerInterface;
  20
  21 /**
  22  *
  23  * class: App
  24  *
  25  * @brief Our main application structure for the life of this page.
  26  *
  27  * Primarily deals with the URL that got us here
  28  * and tries to make some sense of it, and
  29  * stores our page contents and config storage
  30  * and anything else that might need to be passed around
  31  * before we spit the page out.
  32  *
  33  */
  34 class App
  35 {
  36         public $module_loaded = false;
  37         public $module_class = null;
  38         public $query_string = '';
  39         public $page = [];
  40         public $profile;
  41         public $profile_uid;
  42         public $user;
  43         public $cid;
  44         public $contact;
  45         public $contacts;
  46         public $page_contact;
  47         public $content;
  48         public $data = [];
  49         public $error = false;
  50         public $cmd = '';
  51         public $argv;
  52         public $argc;
  53         public $module;
  54         public $timezone;
  55         public $interactive = true;
  56         public $identities;
  57         public $is_mobile = false;
  58         public $is_tablet = false;
  59         public $theme_info = [];
  60         public $category;
  61         // Allow themes to control internal parameters
  62         // by changing App values in theme.php
  63
  64         public $sourcename = '';
  65         public $videowidth = 425;
  66         public $videoheight = 350;
  67         public $force_max_items = 0;
  68         public $theme_events_in_profile = true;
  69
  70         public $stylesheets = [];
  71         public $footerScripts = [];
  72
  73         /**
  74          * @var App\Mode The Mode of the Application
  75          */
  76         private $mode;
  77
  78         /**
  79          * @var string The App URL path
  80          */
  81         private $urlPath;
  82
  83         /**
  84          * @var bool true, if the call is from the Friendica APP, otherwise false
  85          */
  86         private $isFriendicaApp;
  87
  88         /**
  89          * @var bool true, if the call is from an backend node (f.e. worker)
  90          */
  91         private $isBackend;
  92
  93         /**
  94          * @var string The name of the current theme
  95          */
  96         private $currentTheme;
  97
  98         /**
  99          * @var bool check if request was an AJAX (xmlhttprequest) request
 100          */
 101         private $isAjax;
 102
 103         /**
 104          * @var MobileDetect
 105          */
 106         public $mobileDetect;
 107
 108         /**
 109          * @var Configuration The config
 110          */
 111         private $config;
 112
 113         /**
 114          * @var LoggerInterface The logger
 115          */
 116         private $logger;
 117
 118         /**
 119          * @var Profiler The profiler of this app
 120          */
 121         private $profiler;
 122
 123         /**
 124          * Returns the current config cache of this node
 125          *
 126          * @return IConfigCache
 127          */
 128         public function getConfigCache()
 129         {
 130                 return $this->config->getCache();
 131         }
 132
 133         /**
 134          * The basepath of this app
 135          *
 136          * @return string
 137          */
 138         public function getBasePath()
 139         {
 140                 return $this->config->get('system', 'basepath');
 141         }
 142
 143         /**
 144          * The Logger of this app
 145          *
 146          * @return LoggerInterface
 147          */
 148         public function getLogger()
 149         {
 150                 return $this->logger;
 151         }
 152
 153         /**
 154          * The profiler of this app
 155          *
 156          * @return Profiler
 157          */
 158         public function getProfiler()
 159         {
 160                 return $this->profiler;
 161         }
 162
 163         /**
 164          * Returns the Mode of the Application
 165          *
 166          * @return App\Mode The Application Mode
 167          */
 168         public function getMode()
 169         {
 170                 return $this->mode;
 171         }
 172
 173         /**
 174          * Register a stylesheet file path to be included in the <head> tag of every page.
 175          * Inclusion is done in App->initHead().
 176          * The path can be absolute or relative to the Friendica installation base folder.
 177          *
 178          * @see initHead()
 179          *
 180          * @param string $path
 181          * @throws InternalServerErrorException
 182          */
 183         public function registerStylesheet($path)
 184         {
 185                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 186
 187                 $this->stylesheets[] = trim($url, '/');
 188         }
 189
 190         /**
 191          * Register a javascript file path to be included in the <footer> tag of every page.
 192          * Inclusion is done in App->initFooter().
 193          * The path can be absolute or relative to the Friendica installation base folder.
 194          *
 195          * @see initFooter()
 196          *
 197          * @param string $path
 198          * @throws InternalServerErrorException
 199          */
 200         public function registerFooterScript($path)
 201         {
 202                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 203
 204                 $this->footerScripts[] = trim($url, '/');
 205         }
 206
 207         public $queue;
 208         private $scheme;
 209         private $hostname;
 210
 211         /**
 212          * @brief App constructor.
 213          *
 214          * @param Configuration    $config    The Configuration
 215          * @param App\Mode         $mode      The mode of this Friendica app
 216          * @param LoggerInterface  $logger    The current app logger
 217          * @param Profiler         $profiler  The profiler of this application
 218          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 219          *
 220          * @throws Exception if the Basepath is not usable
 221          */
 222         public function __construct(Configuration $config, App\Mode $mode, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
 223         {
 224                 BaseObject::setApp($this);
 225
 226                 $this->logger   = $logger;
 227                 $this->config   = $config;
 228                 $this->profiler = $profiler;
 229                 $this->mode     = $mode;
 230
 231                 $this->checkBackend($isBackend);
 232                 $this->checkFriendicaApp();
 233
 234                 $this->profiler->reset();
 235
 236                 $this->reload();
 237
 238                 set_time_limit(0);
 239
 240                 // This has to be quite large to deal with embedded private photos
 241                 ini_set('pcre.backtrack_limit', 500000);
 242
 243                 $this->scheme = 'http';
 244
 245                 if (!empty($_SERVER['HTTPS']) ||
 246                         !empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
 247                         !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
 248                         !empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
 249                         !empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
 250                         !empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
 251                 ) {
 252                         $this->scheme = 'https';
 253                 }
 254
 255                 if (!empty($_SERVER['SERVER_NAME'])) {
 256                         $this->hostname = $_SERVER['SERVER_NAME'];
 257
 258                         if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
 259                                 $this->hostname .= ':' . $_SERVER['SERVER_PORT'];
 260                         }
 261                 }
 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->determineURLPath();
 341
 342                 $this->getMode()->determine($this->getBasePath());
 343
 344                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 345                         $loader = new ConfigFileLoader($this->getBasePath(), $this->getMode());
 346                         $this->config->getCache()->load($loader->loadCoreConfig('addon'), true);
 347
 348                         $this->profiler->update(
 349                                 $this->config->get('system', 'profiler', false),
 350                                 $this->config->get('rendertime', 'callstack', false));
 351
 352                         Core\Hook::loadHooks();
 353                         $loader = new ConfigFileLoader($this->getBasePath(), $this->mode);
 354                         Core\Hook::callAll('load_config', $loader);
 355                 }
 356
 357                 $this->loadDefaultTimezone();
 358
 359                 Core\L10n::init();
 360         }
 361
 362         /**
 363          * Loads the default timezone
 364          *
 365          * Include support for legacy $default_timezone
 366          *
 367          * @global string $default_timezone
 368          */
 369         private function loadDefaultTimezone()
 370         {
 371                 if ($this->config->get('system', 'default_timezone')) {
 372                         $this->timezone = $this->config->get('system', 'default_timezone');
 373                 } else {
 374                         global $default_timezone;
 375                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 376                 }
 377
 378                 if ($this->timezone) {
 379                         date_default_timezone_set($this->timezone);
 380                 }
 381         }
 382
 383         /**
 384          * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
 385          */
 386         private function determineURLPath()
 387         {
 388                 /*
 389                  * The automatic path detection in this function is currently deactivated,
 390                  * see issue https://github.com/friendica/friendica/issues/6679
 391                  *
 392                  * The problem is that the function seems to be confused with some url.
 393                  * These then confuses the detection which changes the url path.
 394                  */
 395
 396                 /* Relative script path to the web server root
 397                  * Not all of those $_SERVER properties can be present, so we do by inverse priority order
 398                  */
 399 /*
 400                 $relative_script_path = '';
 401                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
 402                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
 403                 $relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
 404                 $relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
 405                 $relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
 406 */
 407                 $this->urlPath = $this->config->get('system', 'urlpath');
 408
 409                 /* $relative_script_path gives /relative/path/to/friendica/module/parameter
 410                  * QUERY_STRING gives pagename=module/parameter
 411                  *
 412                  * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
 413                  */
 414 /*
 415                 if (!empty($relative_script_path)) {
 416                         // Module
 417                         if (!empty($_SERVER['QUERY_STRING'])) {
 418                                 $path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
 419                         } else {
 420                                 // Root page
 421                                 $path = trim($relative_script_path, '/');
 422                         }
 423
 424                         if ($path && $path != $this->urlPath) {
 425                                 $this->urlPath = $path;
 426                         }
 427                 }
 428 */
 429         }
 430
 431         public function getScheme()
 432         {
 433                 return $this->scheme;
 434         }
 435
 436         /**
 437          * @brief Retrieves the Friendica instance base URL
 438          *
 439          * This function assembles the base URL from multiple parts:
 440          * - Protocol is determined either by the request or a combination of
 441          * system.ssl_policy and the $ssl parameter.
 442          * - Host name is determined either by system.hostname or inferred from request
 443          * - Path is inferred from SCRIPT_NAME
 444          *
 445          * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
 446          *
 447          * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
 448          * @return string Friendica server base URL
 449          * @throws InternalServerErrorException
 450          */
 451         public function getBaseURL($ssl = false)
 452         {
 453                 $scheme = $this->scheme;
 454
 455                 if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL) {
 456                         $scheme = 'https';
 457                 }
 458
 459                 //      Basically, we have $ssl = true on any links which can only be seen by a logged in user
 460                 //      (and also the login link). Anything seen by an outsider will have it turned off.
 461
 462                 if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
 463                         if ($ssl) {
 464                                 $scheme = 'https';
 465                         } else {
 466                                 $scheme = 'http';
 467                         }
 468                 }
 469
 470                 if ($this->config->get('config', 'hostname') != '') {
 471                         $this->hostname = $this->config->get('config', 'hostname');
 472                 }
 473
 474                 return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
 475         }
 476
 477         /**
 478          * @brief Initializes the baseurl components
 479          *
 480          * Clears the baseurl cache to prevent inconsistencies
 481          *
 482          * @param string $url
 483          * @throws InternalServerErrorException
 484          */
 485         public function setBaseURL($url)
 486         {
 487                 $parsed = @parse_url($url);
 488                 $hostname = '';
 489
 490                 if (!empty($parsed)) {
 491                         if (!empty($parsed['scheme'])) {
 492                                 $this->scheme = $parsed['scheme'];
 493                         }
 494
 495                         if (!empty($parsed['host'])) {
 496                                 $hostname = $parsed['host'];
 497                         }
 498
 499                         if (!empty($parsed['port'])) {
 500                                 $hostname .= ':' . $parsed['port'];
 501                         }
 502                         if (!empty($parsed['path'])) {
 503                                 $this->urlPath = trim($parsed['path'], '\\/');
 504                         }
 505
 506                         if (file_exists($this->getBasePath() . '/.htpreconfig.php')) {
 507                                 include $this->getBasePath() . '/.htpreconfig.php';
 508                         }
 509
 510                         if ($this->config->get('config', 'hostname') != '') {
 511                                 $this->hostname = $this->config->get('config', 'hostname');
 512                         }
 513
 514                         if (!isset($this->hostname) || ($this->hostname == '')) {
 515                                 $this->hostname = $hostname;
 516                         }
 517                 }
 518         }
 519
 520         public function getHostName()
 521         {
 522                 if ($this->config->get('config', 'hostname') != '') {
 523                         $this->hostname = $this->config->get('config', 'hostname');
 524                 }
 525
 526                 return $this->hostname;
 527         }
 528
 529         public function getURLPath()
 530         {
 531                 return $this->urlPath;
 532         }
 533
 534         /**
 535          * Initializes App->page['htmlhead'].
 536          *
 537          * Includes:
 538          * - Page title
 539          * - Favicons
 540          * - Registered stylesheets (through App->registerStylesheet())
 541          * - Infinite scroll data
 542          * - head.tpl template
 543          */
 544         public function initHead()
 545         {
 546                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 547
 548                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 549                 if ($interval < 0) {
 550                         $interval = 2147483647;
 551                 }
 552
 553                 if ($interval < 10000) {
 554                         $interval = 40000;
 555                 }
 556
 557                 // Default title: current module called
 558                 if (empty($this->page['title']) && $this->module) {
 559                         $this->page['title'] = ucfirst($this->module);
 560                 }
 561
 562                 // Prepend the sitename to the page title
 563                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 564
 565                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 566                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 567                 } else {
 568                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 569                 }
 570
 571                 $this->registerStylesheet($stylesheet);
 572
 573                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 574                 if ($shortcut_icon == '') {
 575                         $shortcut_icon = 'images/friendica-32.png';
 576                 }
 577
 578                 $touch_icon = $this->config->get('system', 'touch_icon');
 579                 if ($touch_icon == '') {
 580                         $touch_icon = 'images/friendica-128.png';
 581                 }
 582
 583                 Core\Hook::callAll('head', $this->page['htmlhead']);
 584
 585                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 586                 /* put the head template at the beginning of page['htmlhead']
 587                  * since the code added by the modules frequently depends on it
 588                  * being first
 589                  */
 590                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 591                         '$baseurl'         => $this->getBaseURL(),
 592                         '$local_user'      => local_user(),
 593                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 594                         '$delitem'         => Core\L10n::t('Delete this item?'),
 595                         '$update_interval' => $interval,
 596                         '$shortcut_icon'   => $shortcut_icon,
 597                         '$touch_icon'      => $touch_icon,
 598                         '$block_public'    => intval($this->config->get('system', 'block_public')),
 599                         '$stylesheets'     => $this->stylesheets,
 600                 ]) . $this->page['htmlhead'];
 601         }
 602
 603         /**
 604          * Initializes App->page['footer'].
 605          *
 606          * Includes:
 607          * - Javascript homebase
 608          * - Mobile toggle link
 609          * - Registered footer scripts (through App->registerFooterScript())
 610          * - footer.tpl template
 611          */
 612         public function initFooter()
 613         {
 614                 // If you're just visiting, let javascript take you home
 615                 if (!empty($_SESSION['visitor_home'])) {
 616                         $homebase = $_SESSION['visitor_home'];
 617                 } elseif (local_user()) {
 618                         $homebase = 'profile/' . $this->user['nickname'];
 619                 }
 620
 621                 if (isset($homebase)) {
 622                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 623                 }
 624
 625                 /*
 626                  * Add a "toggle mobile" link if we're using a mobile device
 627                  */
 628                 if ($this->is_mobile || $this->is_tablet) {
 629                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 630                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 631                         } else {
 632                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 633                         }
 634                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 635                                 '$toggle_link' => $link,
 636                                 '$toggle_text' => Core\L10n::t('toggle mobile')
 637                         ]);
 638                 }
 639
 640                 Core\Hook::callAll('footer', $this->page['footer']);
 641
 642                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 643                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 644                         '$baseurl' => $this->getBaseURL(),
 645                         '$footerScripts' => $this->footerScripts,
 646                 ]) . $this->page['footer'];
 647         }
 648
 649         /**
 650          * @brief Removes the base url from an url. This avoids some mixed content problems.
 651          *
 652          * @param string $origURL
 653          *
 654          * @return string The cleaned url
 655          * @throws InternalServerErrorException
 656          */
 657         public function removeBaseURL($origURL)
 658         {
 659                 // Remove the hostname from the url if it is an internal link
 660                 $nurl = Util\Strings::normaliseLink($origURL);
 661                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 662                 $url = str_replace($base . '/', '', $nurl);
 663
 664                 // if it is an external link return the orignal value
 665                 if ($url == Util\Strings::normaliseLink($origURL)) {
 666                         return $origURL;
 667                 } else {
 668                         return $url;
 669                 }
 670         }
 671
 672         /**
 673          * Returns the current UserAgent as a String
 674          *
 675          * @return string the UserAgent as a String
 676          * @throws InternalServerErrorException
 677          */
 678         public function getUserAgent()
 679         {
 680                 return
 681                         FRIENDICA_PLATFORM . " '" .
 682                         FRIENDICA_CODENAME . "' " .
 683                         FRIENDICA_VERSION . '-' .
 684                         DB_UPDATE_VERSION . '; ' .
 685                         $this->getBaseURL();
 686         }
 687
 688         /**
 689          * Checks, if the call is from the Friendica App
 690          *
 691          * Reason:
 692          * The friendica client has problems with the GUID in the notify. this is some workaround
 693          */
 694         private function checkFriendicaApp()
 695         {
 696                 // Friendica-Client
 697                 $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
 698         }
 699
 700         /**
 701          *      Is the call via the Friendica app? (not a "normale" call)
 702          *
 703          * @return bool true if it's from the Friendica app
 704          */
 705         public function isFriendicaApp()
 706         {
 707                 return $this->isFriendicaApp;
 708         }
 709
 710         /**
 711          * @brief Checks if the site is called via a backend process
 712          *
 713          * This isn't a perfect solution. But we need this check very early.
 714          * So we cannot wait until the modules are loaded.
 715          *
 716          * @param string $backend true, if the backend flag was set during App initialization
 717          *
 718          */
 719         private function checkBackend($backend) {
 720                 static $backends = [
 721                         '_well_known',
 722                         'api',
 723                         'dfrn_notify',
 724                         'fetch',
 725                         'hcard',
 726                         'hostxrd',
 727                         'manifest',
 728                         'nodeinfo',
 729                         'noscrape',
 730                         'p',
 731                         'poco',
 732                         'post',
 733                         'proxy',
 734                         'pubsub',
 735                         'pubsubhubbub',
 736                         'receive',
 737                         'rsd_xml',
 738                         'salmon',
 739                         'statistics_json',
 740                         'xrd',
 741                 ];
 742
 743                 // Check if current module is in backend or backend flag is set
 744                 $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
 745         }
 746
 747         /**
 748          * Returns true, if the call is from a backend node (f.e. from a worker)
 749          *
 750          * @return bool Is it a known backend?
 751          */
 752         public function isBackend()
 753         {
 754                 return $this->isBackend;
 755         }
 756
 757         /**
 758          * @brief Checks if the maximum number of database processes is reached
 759          *
 760          * @return bool Is the limit reached?
 761          */
 762         public function isMaxProcessesReached()
 763         {
 764                 // Deactivated, needs more investigating if this check really makes sense
 765                 return false;
 766
 767                 /*
 768                  * Commented out to suppress static analyzer issues
 769                  *
 770                 if ($this->is_backend()) {
 771                         $process = 'backend';
 772                         $max_processes = $this->config->get('system', 'max_processes_backend');
 773                         if (intval($max_processes) == 0) {
 774                                 $max_processes = 5;
 775                         }
 776                 } else {
 777                         $process = 'frontend';
 778                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 779                         if (intval($max_processes) == 0) {
 780                                 $max_processes = 20;
 781                         }
 782                 }
 783
 784                 $processlist = DBA::processlist();
 785                 if ($processlist['list'] != '') {
 786                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 787
 788                         if ($processlist['amount'] > $max_processes) {
 789                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 790                                 return true;
 791                         }
 792                 }
 793                 return false;
 794                  */
 795         }
 796
 797         /**
 798          * @brief Checks if the minimal memory is reached
 799          *
 800          * @return bool Is the memory limit reached?
 801          * @throws InternalServerErrorException
 802          */
 803         public function isMinMemoryReached()
 804         {
 805                 $min_memory = $this->config->get('system', 'min_memory', 0);
 806                 if ($min_memory == 0) {
 807                         return false;
 808                 }
 809
 810                 if (!is_readable('/proc/meminfo')) {
 811                         return false;
 812                 }
 813
 814                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 815
 816                 $meminfo = [];
 817                 foreach ($memdata as $line) {
 818                         $data = explode(':', $line);
 819                         if (count($data) != 2) {
 820                                 continue;
 821                         }
 822                         list($key, $val) = $data;
 823                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 824                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 825                 }
 826
 827                 if (!isset($meminfo['MemFree'])) {
 828                         return false;
 829                 }
 830
 831                 $free = $meminfo['MemFree'];
 832
 833                 $reached = ($free < $min_memory);
 834
 835                 if ($reached) {
 836                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 837                 }
 838
 839                 return $reached;
 840         }
 841
 842         /**
 843          * @brief Checks if the maximum load is reached
 844          *
 845          * @return bool Is the load reached?
 846          * @throws InternalServerErrorException
 847          */
 848         public function isMaxLoadReached()
 849         {
 850                 if ($this->isBackend()) {
 851                         $process = 'backend';
 852                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 853                         if ($maxsysload < 1) {
 854                                 $maxsysload = 50;
 855                         }
 856                 } else {
 857                         $process = 'frontend';
 858                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 859                         if ($maxsysload < 1) {
 860                                 $maxsysload = 50;
 861                         }
 862                 }
 863
 864                 $load = Core\System::currentLoad();
 865                 if ($load) {
 866                         if (intval($load) > $maxsysload) {
 867                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 868                                 return true;
 869                         }
 870                 }
 871                 return false;
 872         }
 873
 874         /**
 875          * Executes a child process with 'proc_open'
 876          *
 877          * @param string $command The command to execute
 878          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 879          * @throws InternalServerErrorException
 880          */
 881         public function proc_run($command, $args)
 882         {
 883                 if (!function_exists('proc_open')) {
 884                         return;
 885                 }
 886
 887                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 888
 889                 foreach ($args as $key => $value) {
 890                         if (!is_null($value) && is_bool($value) && !$value) {
 891                                 continue;
 892                         }
 893
 894                         $cmdline .= ' --' . $key;
 895                         if (!is_null($value) && !is_bool($value)) {
 896                                 $cmdline .= ' ' . $value;
 897                         }
 898                 }
 899
 900                 if ($this->isMinMemoryReached()) {
 901                         return;
 902                 }
 903
 904                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 905                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 906                 } else {
 907                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 908                 }
 909                 if (!is_resource($resource)) {
 910                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 911                         return;
 912                 }
 913                 proc_close($resource);
 914         }
 915
 916         /**
 917          * Generates the site's default sender email address
 918          *
 919          * @return string
 920          * @throws InternalServerErrorException
 921          */
 922         public function getSenderEmailAddress()
 923         {
 924                 $sender_email = $this->config->get('config', 'sender_email');
 925                 if (empty($sender_email)) {
 926                         $hostname = $this->getHostName();
 927                         if (strpos($hostname, ':')) {
 928                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 929                         }
 930
 931                         $sender_email = 'noreply@' . $hostname;
 932                 }
 933
 934                 return $sender_email;
 935         }
 936
 937         /**
 938          * Returns the current theme name.
 939          *
 940          * @return string the name of the current theme
 941          * @throws InternalServerErrorException
 942          */
 943         public function getCurrentTheme()
 944         {
 945                 if ($this->getMode()->isInstall()) {
 946                         return '';
 947                 }
 948
 949                 if (!$this->currentTheme) {
 950                         $this->computeCurrentTheme();
 951                 }
 952
 953                 return $this->currentTheme;
 954         }
 955
 956         public function setCurrentTheme($theme)
 957         {
 958                 $this->currentTheme = $theme;
 959         }
 960
 961         /**
 962          * Computes the current theme name based on the node settings, the user settings and the device type
 963          *
 964          * @throws Exception
 965          */
 966         private function computeCurrentTheme()
 967         {
 968                 $system_theme = $this->config->get('system', 'theme');
 969                 if (!$system_theme) {
 970                         throw new Exception(Core\L10n::t('No system theme config value set.'));
 971                 }
 972
 973                 // Sane default
 974                 $this->currentTheme = $system_theme;
 975
 976                 $allowed_themes = explode(',', $this->config->get('system', 'allowed_themes', $system_theme));
 977
 978                 $page_theme = null;
 979                 // Find the theme that belongs to the user whose stuff we are looking at
 980                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 981                         // Allow folks to override user themes and always use their own on their own site.
 982                         // This works only if the user is on the same server
 983                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 984                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 985                                 $page_theme = $user['theme'];
 986                         }
 987                 }
 988
 989                 $user_theme = Core\Session::get('theme', $system_theme);
 990
 991                 // Specific mobile theme override
 992                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 993                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 994                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 995
 996                         // --- means same mobile theme as desktop
 997                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
 998                                 $user_theme = $user_mobile_theme;
 999                         }
1000                 }
1001
1002                 if ($page_theme) {
1003                         $theme_name = $page_theme;
1004                 } else {
1005                         $theme_name = $user_theme;
1006                 }
1007
1008                 if ($theme_name
1009                         && in_array($theme_name, $allowed_themes)
1010                         && (file_exists('view/theme/' . $theme_name . '/style.css')
1011                         || file_exists('view/theme/' . $theme_name . '/style.php'))
1012                 ) {
1013                         $this->currentTheme = $theme_name;
1014                 }
1015         }
1016
1017         /**
1018          * @brief Return full URL to theme which is currently in effect.
1019          *
1020          * Provide a sane default if nothing is chosen or the specified theme does not exist.
1021          *
1022          * @return string
1023          * @throws InternalServerErrorException
1024          */
1025         public function getCurrentThemeStylesheetPath()
1026         {
1027                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
1028         }
1029
1030         /**
1031          * Check if request was an AJAX (xmlhttprequest) request.
1032          *
1033          * @return boolean true if it was an AJAX request
1034          */
1035         public function isAjax()
1036         {
1037                 return $this->isAjax;
1038         }
1039
1040         /**
1041          * Returns the value of a argv key
1042          * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
1043          *
1044          * @param int $position the position of the argument
1045          * @param mixed $default the default value if not found
1046          *
1047          * @return mixed returns the value of the argument
1048          */
1049         public function getArgumentValue($position, $default = '')
1050         {
1051                 if (array_key_exists($position, $this->argv)) {
1052                         return $this->argv[$position];
1053                 }
1054
1055                 return $default;
1056         }
1057
1058         /**
1059          * Sets the base url for use in cmdline programs which don't have
1060          * $_SERVER variables
1061          */
1062         public function checkURL()
1063         {
1064                 $url = $this->config->get('system', 'url');
1065
1066                 // if the url isn't set or the stored url is radically different
1067                 // than the currently visited url, store the current value accordingly.
1068                 // "Radically different" ignores common variations such as http vs https
1069                 // and www.example.com vs example.com.
1070                 // We will only change the url to an ip address if there is no existing setting
1071
1072                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->getHostName()))) {
1073                         $this->config->set('system', 'url', $this->getBaseURL());
1074                 }
1075         }
1076
1077         /**
1078          * Frontend App script
1079          *
1080          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
1081          * request and a representation of the response.
1082          *
1083          * This probably should change to limit the size of this monster method.
1084          */
1085         public function runFrontend()
1086         {
1087                 // Missing DB connection: ERROR
1088                 if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
1089                         Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
1090                 }
1091
1092                 // Max Load Average reached: ERROR
1093                 if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
1094                         header('Retry-After: 120');
1095                         header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
1096
1097                         Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
1098                 }
1099
1100                 if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
1101                         Core\System::httpExit(404);
1102                 }
1103
1104                 if (!$this->getMode()->isInstall()) {
1105                         // Force SSL redirection
1106                         if ($this->config->get('system', 'force_ssl') && ($this->getScheme() == "http")
1107                                 && intval($this->config->get('system', 'ssl_policy')) == SSL_POLICY_FULL
1108                                 && strpos($this->getBaseURL(), 'https://') === 0
1109                                 && $_SERVER['REQUEST_METHOD'] == 'GET') {
1110                                 header('HTTP/1.1 302 Moved Temporarily');
1111                                 header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
1112                                 exit();
1113                         }
1114
1115                         Core\Session::init();
1116                         Core\Hook::callAll('init_1');
1117                 }
1118
1119                 // Exclude the backend processes from the session management
1120                 if (!$this->isBackend()) {
1121                         $stamp1 = microtime(true);
1122                         session_start();
1123                         $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
1124                         Core\L10n::setSessionVariable();
1125                         Core\L10n::setLangFromSession();
1126                 } else {
1127                         $_SESSION = [];
1128                         Core\Worker::executeIfIdle();
1129                 }
1130
1131                 if ($this->getMode()->isNormal()) {
1132                         $requester = HTTPSignature::getSigner('', $_SERVER);
1133                         if (!empty($requester)) {
1134                                 Profile::addVisitorCookieForHandle($requester);
1135                         }
1136                 }
1137
1138                 // ZRL
1139                 if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
1140                         $this->query_string = Model\Profile::stripZrls($this->query_string);
1141                         if (!local_user()) {
1142                                 // Only continue when the given profile link seems valid
1143                                 // Valid profile links contain a path with "/profile/" and no query parameters
1144                                 if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
1145                                         strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
1146                                         if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
1147                                                 $_SESSION['my_url'] = $_GET['zrl'];
1148                                                 $_SESSION['authenticated'] = 0;
1149                                         }
1150                                         Model\Profile::zrlInit($this);
1151                                 } else {
1152                                         // Someone came with an invalid parameter, maybe as a DDoS attempt
1153                                         // We simply stop processing here
1154                                         Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
1155                                         Core\System::httpExit(403, ['title' => '403 Forbidden']);
1156                                 }
1157                         }
1158                 }
1159
1160                 if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
1161                         $token = $_GET['owt'];
1162                         $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
1163                         Model\Profile::openWebAuthInit($token);
1164                 }
1165
1166                 Module\Login::sessionAuth();
1167
1168                 if (empty($_SESSION['authenticated'])) {
1169                         header('X-Account-Management-Status: none');
1170                 }
1171
1172                 $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
1173                 $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
1174                 $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
1175
1176                 /*
1177                  * check_config() is responsible for running update scripts. These automatically
1178                  * update the DB schema whenever we push a new one out. It also checks to see if
1179                  * any addons have been added or removed and reacts accordingly.
1180                  */
1181
1182                 // in install mode, any url loads install module
1183                 // but we need "view" module for stylesheet
1184                 if ($this->getMode()->isInstall() && $this->module != 'view') {
1185                         $this->module = 'install';
1186                 } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
1187                         $this->module = 'maintenance';
1188                 } else {
1189                         $this->checkURL();
1190                         Core\Update::check($this->getBasePath(), false, $this->getMode());
1191                         Core\Addon::loadAddons();
1192                         Core\Hook::loadHooks();
1193                 }
1194
1195                 $this->page = [
1196                         'aside' => '',
1197                         'bottom' => '',
1198                         'content' => '',
1199                         'footer' => '',
1200                         'htmlhead' => '',
1201                         'nav' => '',
1202                         'page_title' => '',
1203                         'right_aside' => '',
1204                         'template' => '',
1205                         'title' => ''
1206                 ];
1207
1208                 if (strlen($this->module)) {
1209                         // Compatibility with the Android Diaspora client
1210                         if ($this->module == 'stream') {
1211                                 $this->internalRedirect('network?f=&order=post');
1212                         }
1213
1214                         if ($this->module == 'conversations') {
1215                                 $this->internalRedirect('message');
1216                         }
1217
1218                         if ($this->module == 'commented') {
1219                                 $this->internalRedirect('network?f=&order=comment');
1220                         }
1221
1222                         if ($this->module == 'liked') {
1223                                 $this->internalRedirect('network?f=&order=comment');
1224                         }
1225
1226                         if ($this->module == 'activity') {
1227                                 $this->internalRedirect('network/?f=&conv=1');
1228                         }
1229
1230                         if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
1231                                 $this->internalRedirect('bookmarklet');
1232                         }
1233
1234                         if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
1235                                 $this->internalRedirect('settings');
1236                         }
1237
1238                         if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
1239                                 $this->internalRedirect('search');
1240                         }
1241
1242                         // Compatibility with the Firefox App
1243                         if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
1244                                 $this->module = "login";
1245                         }
1246
1247                         $privateapps = $this->config->get('config', 'private_addons', false);
1248                         if (Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1249                                 //Check if module is an app and if public access to apps is allowed or not
1250                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1251                                         info(Core\L10n::t("You must be logged in to use addons. "));
1252                                 } else {
1253                                         include_once "addon/{$this->module}/{$this->module}.php";
1254                                         if (function_exists($this->module . '_module')) {
1255                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1256                                                 $this->module_class = 'Friendica\\LegacyModule';
1257                                                 $this->module_loaded = true;
1258                                         }
1259                                 }
1260                         }
1261
1262                         // Controller class routing
1263                         if (! $this->module_loaded && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
1264                                 $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
1265                                 $this->module_loaded = true;
1266                         }
1267
1268                         /* If not, next look for a 'standard' program module in the 'mod' directory
1269                          * We emulate a Module class through the LegacyModule class
1270                          */
1271                         if (! $this->module_loaded && file_exists("mod/{$this->module}.php")) {
1272                                 LegacyModule::setModuleFile("mod/{$this->module}.php");
1273                                 $this->module_class = 'Friendica\\LegacyModule';
1274                                 $this->module_loaded = true;
1275                         }
1276
1277                         /* The URL provided does not resolve to a valid module.
1278                          *
1279                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1280                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1281                          * 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
1282                          * this will often succeed and eventually do the right thing.
1283                          *
1284                          * Otherwise we are going to emit a 404 not found.
1285                          */
1286                         if (! $this->module_loaded) {
1287                                 // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
1288                                 if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
1289                                         exit();
1290                                 }
1291
1292                                 if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
1293                                         Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
1294                                         $this->internalRedirect($_SERVER['REQUEST_URI']);
1295                                 }
1296
1297                                 Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1298
1299                                 header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
1300                                 $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
1301                                 $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
1302                                         '$message' =>  Core\L10n::t('Page not found.')
1303                                 ]);
1304                         }
1305                 }
1306
1307                 $content = '';
1308
1309                 // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1310                 if ($this->module_loaded) {
1311                         $this->page['page_title'] = $this->module;
1312                         $placeholder = '';
1313
1314                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1315
1316                         call_user_func([$this->module_class, 'init']);
1317
1318                         // "rawContent" is especially meant for technical endpoints.
1319                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1320                         if (!$this->error) {
1321                                 call_user_func([$this->module_class, 'rawContent']);
1322                         }
1323                 }
1324
1325                 // Load current theme info after module has been initialized as theme could have been set in module
1326                 $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1327                 if (file_exists($theme_info_file)) {
1328                         require_once $theme_info_file;
1329                 }
1330
1331                 if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1332                         $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1333                         $func($this);
1334                 }
1335
1336                 if ($this->module_loaded) {
1337                         if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
1338                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1339                                 call_user_func([$this->module_class, 'post']);
1340                         }
1341
1342                         if (! $this->error) {
1343                                 Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1344                                 call_user_func([$this->module_class, 'afterpost']);
1345                         }
1346
1347                         if (! $this->error) {
1348                                 $arr = ['content' => $content];
1349                                 Core\Hook::callAll($this->module . '_mod_content', $arr);
1350                                 $content = $arr['content'];
1351                                 $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1352                                 Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1353                                 $content .= $arr['content'];
1354                         }
1355                 }
1356
1357                 // initialise content region
1358                 if ($this->getMode()->isNormal()) {
1359                         Core\Hook::callAll('page_content_top', $this->page['content']);
1360                 }
1361
1362                 $this->page['content'] .= $content;
1363
1364                 /* Create the page head after setting the language
1365                  * and getting any auth credentials.
1366                  *
1367                  * Moved initHead() and initFooter() to after
1368                  * all the module functions have executed so that all
1369                  * theme choices made by the modules can take effect.
1370                  */
1371                 $this->initHead();
1372
1373                 /* Build the page ending -- this is stuff that goes right before
1374                  * the closing </body> tag
1375                  */
1376                 $this->initFooter();
1377
1378                 /* now that we've been through the module content, see if the page reported
1379                  * a permission problem and if so, a 403 response would seem to be in order.
1380                  */
1381                 if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
1382                         header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
1383                 }
1384
1385                 // Report anything which needs to be communicated in the notification area (before the main body)
1386                 Core\Hook::callAll('page_end', $this->page['content']);
1387
1388                 // Add the navigation (menu) template
1389                 if ($this->module != 'install' && $this->module != 'maintenance') {
1390                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1391                         $this->page['nav']       = Content\Nav::build($this);
1392                 }
1393
1394                 // Build the page - now that we have all the components
1395                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1396                         $doc = new DOMDocument();
1397
1398                         $target = new DOMDocument();
1399                         $target->loadXML("<root></root>");
1400
1401                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1402
1403                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1404                         @$doc->loadHTML($content);
1405
1406                         $xpath = new DOMXPath($doc);
1407
1408                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1409
1410                         foreach ($list as $item) {
1411                                 $item = $target->importNode($item, true);
1412
1413                                 // And then append it to the target
1414                                 $target->documentElement->appendChild($item);
1415                         }
1416
1417                         if ($_GET["mode"] == "raw") {
1418                                 header("Content-type: text/html; charset=utf-8");
1419
1420                                 echo substr($target->saveHTML(), 6, -8);
1421
1422                                 exit();
1423                         }
1424                 }
1425
1426                 $page    = $this->page;
1427                 $profile = $this->profile;
1428
1429                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1430                 header("Content-type: text/html; charset=utf-8");
1431
1432                 if ($this->config->get('system', 'hsts') && ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
1433                         header("Strict-Transport-Security: max-age=31536000");
1434                 }
1435
1436                 // Some security stuff
1437                 header('X-Content-Type-Options: nosniff');
1438                 header('X-XSS-Protection: 1; mode=block');
1439                 header('X-Permitted-Cross-Domain-Policies: none');
1440                 header('X-Frame-Options: sameorigin');
1441
1442                 // Things like embedded OSM maps don't work, when this is enabled
1443                 // 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'");
1444
1445                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1446                  * to load another page template than the default one.
1447                  * The page templates are located in /view/php/ or in the theme directory.
1448                  */
1449                 if (isset($_GET["mode"])) {
1450                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1451                 }
1452
1453                 // If there is no page template use the default page template
1454                 if (empty($template)) {
1455                         $template = Core\Theme::getPathForFile("default.php");
1456                 }
1457
1458                 // Theme templates expect $a as an App instance
1459                 $a = $this;
1460
1461                 // Used as is in view/php/default.php
1462                 $lang = Core\L10n::getCurrentLang();
1463
1464                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1465                 require_once $template;
1466         }
1467
1468         /**
1469          * Redirects to another module relative to the current Friendica base.
1470          * If you want to redirect to a external URL, use System::externalRedirectTo()
1471          *
1472          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1473          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1474          *
1475          * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
1476          */
1477         public function internalRedirect($toUrl = '', $ssl = false)
1478         {
1479                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1480                         throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1481                 }
1482
1483                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1484                 Core\System::externalRedirect($redirectTo);
1485         }
1486
1487         /**
1488          * Automatically redirects to relative or absolute URL
1489          * Should only be used if it isn't clear if the URL is either internal or external
1490          *
1491          * @param string $toUrl The target URL
1492          * @throws InternalServerErrorException
1493          */
1494         public function redirect($toUrl)
1495         {
1496                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1497                         Core\System::externalRedirect($toUrl);
1498                 } else {
1499                         $this->internalRedirect($toUrl);
1500                 }
1501         }
1502 }