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                 if (!empty($this->getBasePath())) {
 186                         $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 187                 } else {
 188                         $url = $path;
 189                 }
 190
 191                 $this->stylesheets[] = trim($url, '/');
 192         }
 193
 194         /**
 195          * Register a javascript file path to be included in the <footer> tag of every page.
 196          * Inclusion is done in App->initFooter().
 197          * The path can be absolute or relative to the Friendica installation base folder.
 198          *
 199          * @see initFooter()
 200          *
 201          * @param string $path
 202          * @throws InternalServerErrorException
 203          */
 204         public function registerFooterScript($path)
 205         {
 206                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 207
 208                 $this->footerScripts[] = trim($url, '/');
 209         }
 210
 211         public $queue;
 212         private $scheme;
 213         private $hostname;
 214
 215         /**
 216          * @brief App constructor.
 217          *
 218          * @param Configuration    $config    The Configuration
 219          * @param App\Mode         $mode      The mode of this Friendica app
 220          * @param LoggerInterface  $logger    The current app logger
 221          * @param Profiler         $profiler  The profiler of this application
 222          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 223          *
 224          * @throws Exception if the Basepath is not usable
 225          */
 226         public function __construct(Configuration $config, App\Mode $mode, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
 227         {
 228                 BaseObject::setApp($this);
 229
 230                 $this->logger   = $logger;
 231                 $this->config   = $config;
 232                 $this->profiler = $profiler;
 233                 $this->mode     = $mode;
 234
 235                 $this->checkBackend($isBackend);
 236                 $this->checkFriendicaApp();
 237
 238                 $this->profiler->reset();
 239
 240                 $this->reload();
 241
 242                 set_time_limit(0);
 243
 244                 // This has to be quite large to deal with embedded private photos
 245                 ini_set('pcre.backtrack_limit', 500000);
 246
 247                 $this->scheme = 'http';
 248
 249                 if (!empty($_SERVER['HTTPS']) ||
 250                         !empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
 251                         !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
 252                         !empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
 253                         !empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
 254                         !empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
 255                 ) {
 256                         $this->scheme = 'https';
 257                 }
 258
 259                 if (!empty($_SERVER['SERVER_NAME'])) {
 260                         $this->hostname = $_SERVER['SERVER_NAME'];
 261
 262                         if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
 263                                 $this->hostname .= ':' . $_SERVER['SERVER_PORT'];
 264                         }
 265                 }
 266
 267                 set_include_path(
 268                         get_include_path() . PATH_SEPARATOR
 269                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 270                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 271                         . $this->getBasePath());
 272
 273                 if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
 274                         $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
 275                 } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
 276                         $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
 277                 }
 278
 279                 // removing trailing / - maybe a nginx problem
 280                 $this->query_string = ltrim($this->query_string, '/');
 281
 282                 if (!empty($_GET['pagename'])) {
 283                         $this->cmd = trim($_GET['pagename'], '/\\');
 284                 } elseif (!empty($_GET['q'])) {
 285                         $this->cmd = trim($_GET['q'], '/\\');
 286                 }
 287
 288                 // fix query_string
 289                 $this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
 290
 291                 // unix style "homedir"
 292                 if (substr($this->cmd, 0, 1) === '~') {
 293                         $this->cmd = 'profile/' . substr($this->cmd, 1);
 294                 }
 295
 296                 // Diaspora style profile url
 297                 if (substr($this->cmd, 0, 2) === 'u/') {
 298                         $this->cmd = 'profile/' . substr($this->cmd, 2);
 299                 }
 300
 301                 /*
 302                  * Break the URL path into C style argc/argv style arguments for our
 303                  * modules. Given "http://example.com/module/arg1/arg2", $this->argc
 304                  * will be 3 (integer) and $this->argv will contain:
 305                  *   [0] => 'module'
 306                  *   [1] => 'arg1'
 307                  *   [2] => 'arg2'
 308                  *
 309                  *
 310                  * There will always be one argument. If provided a naked domain
 311                  * URL, $this->argv[0] is set to "home".
 312                  */
 313
 314                 $this->argv = explode('/', $this->cmd);
 315                 $this->argc = count($this->argv);
 316                 if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
 317                         $this->module = str_replace('.', '_', $this->argv[0]);
 318                         $this->module = str_replace('-', '_', $this->module);
 319                 } else {
 320                         $this->argc = 1;
 321                         $this->argv = ['home'];
 322                         $this->module = 'home';
 323                 }
 324
 325                 // Detect mobile devices
 326                 $mobile_detect = new MobileDetect();
 327
 328                 $this->mobileDetect = $mobile_detect;
 329
 330                 $this->is_mobile = $mobile_detect->isMobile();
 331                 $this->is_tablet = $mobile_detect->isTablet();
 332
 333                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 334
 335                 // Register template engines
 336                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 337         }
 338
 339         /**
 340          * Reloads the whole app instance
 341          */
 342         public function reload()
 343         {
 344                 $this->determineURLPath();
 345
 346                 $this->getMode()->determine($this->getBasePath());
 347
 348                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 349                         $loader = new ConfigFileLoader($this->getBasePath(), $this->getMode());
 350                         $this->config->getCache()->load($loader->loadCoreConfig('addon'), true);
 351
 352                         $this->profiler->update(
 353                                 $this->config->get('system', 'profiler', false),
 354                                 $this->config->get('rendertime', 'callstack', false));
 355
 356                         Core\Hook::loadHooks();
 357                         $loader = new ConfigFileLoader($this->getBasePath(), $this->mode);
 358                         Core\Hook::callAll('load_config', $loader);
 359                 }
 360
 361                 $this->loadDefaultTimezone();
 362
 363                 Core\L10n::init();
 364         }
 365
 366         /**
 367          * Loads the default timezone
 368          *
 369          * Include support for legacy $default_timezone
 370          *
 371          * @global string $default_timezone
 372          */
 373         private function loadDefaultTimezone()
 374         {
 375                 if ($this->config->get('system', 'default_timezone')) {
 376                         $this->timezone = $this->config->get('system', 'default_timezone');
 377                 } else {
 378                         global $default_timezone;
 379                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 380                 }
 381
 382                 if ($this->timezone) {
 383                         date_default_timezone_set($this->timezone);
 384                 }
 385         }
 386
 387         /**
 388          * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
 389          */
 390         private function determineURLPath()
 391         {
 392                 /*
 393                  * The automatic path detection in this function is currently deactivated,
 394                  * see issue https://github.com/friendica/friendica/issues/6679
 395                  *
 396                  * The problem is that the function seems to be confused with some url.
 397                  * These then confuses the detection which changes the url path.
 398                  */
 399
 400                 /* Relative script path to the web server root
 401                  * Not all of those $_SERVER properties can be present, so we do by inverse priority order
 402                  */
 403 /*
 404                 $relative_script_path = '';
 405                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
 406                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
 407                 $relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
 408                 $relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
 409                 $relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
 410 */
 411                 $this->urlPath = $this->config->get('system', 'urlpath');
 412
 413                 /* $relative_script_path gives /relative/path/to/friendica/module/parameter
 414                  * QUERY_STRING gives pagename=module/parameter
 415                  *
 416                  * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
 417                  */
 418 /*
 419                 if (!empty($relative_script_path)) {
 420                         // Module
 421                         if (!empty($_SERVER['QUERY_STRING'])) {
 422                                 $path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
 423                         } else {
 424                                 // Root page
 425                                 $path = trim($relative_script_path, '/');
 426                         }
 427
 428                         if ($path && $path != $this->urlPath) {
 429                                 $this->urlPath = $path;
 430                         }
 431                 }
 432 */
 433         }
 434
 435         public function getScheme()
 436         {
 437                 return $this->scheme;
 438         }
 439
 440         /**
 441          * @brief Retrieves the Friendica instance base URL
 442          *
 443          * This function assembles the base URL from multiple parts:
 444          * - Protocol is determined either by the request or a combination of
 445          * system.ssl_policy and the $ssl parameter.
 446          * - Host name is determined either by system.hostname or inferred from request
 447          * - Path is inferred from SCRIPT_NAME
 448          *
 449          * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
 450          *
 451          * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
 452          * @return string Friendica server base URL
 453          * @throws InternalServerErrorException
 454          */
 455         public function getBaseURL($ssl = false)
 456         {
 457                 $scheme = $this->scheme;
 458
 459                 if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL) {
 460                         $scheme = 'https';
 461                 }
 462
 463                 //      Basically, we have $ssl = true on any links which can only be seen by a logged in user
 464                 //      (and also the login link). Anything seen by an outsider will have it turned off.
 465
 466                 if ($this->config->get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
 467                         if ($ssl) {
 468                                 $scheme = 'https';
 469                         } else {
 470                                 $scheme = 'http';
 471                         }
 472                 }
 473
 474                 if ($this->config->get('config', 'hostname') != '') {
 475                         $this->hostname = $this->config->get('config', 'hostname');
 476                 }
 477
 478                 return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
 479         }
 480
 481         /**
 482          * @brief Initializes the baseurl components
 483          *
 484          * Clears the baseurl cache to prevent inconsistencies
 485          *
 486          * @param string $url
 487          * @throws InternalServerErrorException
 488          */
 489         public function setBaseURL($url)
 490         {
 491                 $parsed = @parse_url($url);
 492                 $hostname = '';
 493
 494                 if (!empty($parsed)) {
 495                         if (!empty($parsed['scheme'])) {
 496                                 $this->scheme = $parsed['scheme'];
 497                         }
 498
 499                         if (!empty($parsed['host'])) {
 500                                 $hostname = $parsed['host'];
 501                         }
 502
 503                         if (!empty($parsed['port'])) {
 504                                 $hostname .= ':' . $parsed['port'];
 505                         }
 506                         if (!empty($parsed['path'])) {
 507                                 $this->urlPath = trim($parsed['path'], '\\/');
 508                         }
 509
 510                         if (file_exists($this->getBasePath() . '/.htpreconfig.php')) {
 511                                 include $this->getBasePath() . '/.htpreconfig.php';
 512                         }
 513
 514                         if ($this->config->get('config', 'hostname') != '') {
 515                                 $this->hostname = $this->config->get('config', 'hostname');
 516                         }
 517
 518                         if (!isset($this->hostname) || ($this->hostname == '')) {
 519                                 $this->hostname = $hostname;
 520                         }
 521                 }
 522         }
 523
 524         public function getHostName()
 525         {
 526                 if ($this->config->get('config', 'hostname') != '') {
 527                         $this->hostname = $this->config->get('config', 'hostname');
 528                 }
 529
 530                 return $this->hostname;
 531         }
 532
 533         public function getURLPath()
 534         {
 535                 return $this->urlPath;
 536         }
 537
 538         /**
 539          * Initializes App->page['htmlhead'].
 540          *
 541          * Includes:
 542          * - Page title
 543          * - Favicons
 544          * - Registered stylesheets (through App->registerStylesheet())
 545          * - Infinite scroll data
 546          * - head.tpl template
 547          */
 548         public function initHead()
 549         {
 550                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 551
 552                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 553                 if ($interval < 0) {
 554                         $interval = 2147483647;
 555                 }
 556
 557                 if ($interval < 10000) {
 558                         $interval = 40000;
 559                 }
 560
 561                 // Default title: current module called
 562                 if (empty($this->page['title']) && $this->module) {
 563                         $this->page['title'] = ucfirst($this->module);
 564                 }
 565
 566                 // Prepend the sitename to the page title
 567                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 568
 569                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 570                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 571                 } else {
 572                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 573                 }
 574
 575                 $this->registerStylesheet($stylesheet);
 576
 577                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 578                 if ($shortcut_icon == '') {
 579                         $shortcut_icon = 'images/friendica-32.png';
 580                 }
 581
 582                 $touch_icon = $this->config->get('system', 'touch_icon');
 583                 if ($touch_icon == '') {
 584                         $touch_icon = 'images/friendica-128.png';
 585                 }
 586
 587                 Core\Hook::callAll('head', $this->page['htmlhead']);
 588
 589                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 590                 /* put the head template at the beginning of page['htmlhead']
 591                  * since the code added by the modules frequently depends on it
 592                  * being first
 593                  */
 594                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 595                         '$baseurl'         => $this->getBaseURL(),
 596                         '$local_user'      => local_user(),
 597                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 598                         '$delitem'         => Core\L10n::t('Delete this item?'),
 599                         '$update_interval' => $interval,
 600                         '$shortcut_icon'   => $shortcut_icon,
 601                         '$touch_icon'      => $touch_icon,
 602                         '$block_public'    => intval($this->config->get('system', 'block_public')),
 603                         '$stylesheets'     => $this->stylesheets,
 604                 ]) . $this->page['htmlhead'];
 605         }
 606
 607         /**
 608          * Initializes App->page['footer'].
 609          *
 610          * Includes:
 611          * - Javascript homebase
 612          * - Mobile toggle link
 613          * - Registered footer scripts (through App->registerFooterScript())
 614          * - footer.tpl template
 615          */
 616         public function initFooter()
 617         {
 618                 // If you're just visiting, let javascript take you home
 619                 if (!empty($_SESSION['visitor_home'])) {
 620                         $homebase = $_SESSION['visitor_home'];
 621                 } elseif (local_user()) {
 622                         $homebase = 'profile/' . $this->user['nickname'];
 623                 }
 624
 625                 if (isset($homebase)) {
 626                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 627                 }
 628
 629                 /*
 630                  * Add a "toggle mobile" link if we're using a mobile device
 631                  */
 632                 if ($this->is_mobile || $this->is_tablet) {
 633                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 634                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 635                         } else {
 636                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 637                         }
 638                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 639                                 '$toggle_link' => $link,
 640                                 '$toggle_text' => Core\L10n::t('toggle mobile')
 641                         ]);
 642                 }
 643
 644                 Core\Hook::callAll('footer', $this->page['footer']);
 645
 646                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 647                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 648                         '$baseurl' => $this->getBaseURL(),
 649                         '$footerScripts' => $this->footerScripts,
 650                 ]) . $this->page['footer'];
 651         }
 652
 653         /**
 654          * @brief Removes the base url from an url. This avoids some mixed content problems.
 655          *
 656          * @param string $origURL
 657          *
 658          * @return string The cleaned url
 659          * @throws InternalServerErrorException
 660          */
 661         public function removeBaseURL($origURL)
 662         {
 663                 // Remove the hostname from the url if it is an internal link
 664                 $nurl = Util\Strings::normaliseLink($origURL);
 665                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 666                 $url = str_replace($base . '/', '', $nurl);
 667
 668                 // if it is an external link return the orignal value
 669                 if ($url == Util\Strings::normaliseLink($origURL)) {
 670                         return $origURL;
 671                 } else {
 672                         return $url;
 673                 }
 674         }
 675
 676         /**
 677          * Returns the current UserAgent as a String
 678          *
 679          * @return string the UserAgent as a String
 680          * @throws InternalServerErrorException
 681          */
 682         public function getUserAgent()
 683         {
 684                 return
 685                         FRIENDICA_PLATFORM . " '" .
 686                         FRIENDICA_CODENAME . "' " .
 687                         FRIENDICA_VERSION . '-' .
 688                         DB_UPDATE_VERSION . '; ' .
 689                         $this->getBaseURL();
 690         }
 691
 692         /**
 693          * Checks, if the call is from the Friendica App
 694          *
 695          * Reason:
 696          * The friendica client has problems with the GUID in the notify. this is some workaround
 697          */
 698         private function checkFriendicaApp()
 699         {
 700                 // Friendica-Client
 701                 $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
 702         }
 703
 704         /**
 705          *      Is the call via the Friendica app? (not a "normale" call)
 706          *
 707          * @return bool true if it's from the Friendica app
 708          */
 709         public function isFriendicaApp()
 710         {
 711                 return $this->isFriendicaApp;
 712         }
 713
 714         /**
 715          * @brief Checks if the site is called via a backend process
 716          *
 717          * This isn't a perfect solution. But we need this check very early.
 718          * So we cannot wait until the modules are loaded.
 719          *
 720          * @param string $backend true, if the backend flag was set during App initialization
 721          *
 722          */
 723         private function checkBackend($backend) {
 724                 static $backends = [
 725                         '_well_known',
 726                         'api',
 727                         'dfrn_notify',
 728                         'fetch',
 729                         'hcard',
 730                         'hostxrd',
 731                         'manifest',
 732                         'nodeinfo',
 733                         'noscrape',
 734                         'p',
 735                         'poco',
 736                         'post',
 737                         'proxy',
 738                         'pubsub',
 739                         'pubsubhubbub',
 740                         'receive',
 741                         'rsd_xml',
 742                         'salmon',
 743                         'statistics_json',
 744                         'xrd',
 745                 ];
 746
 747                 // Check if current module is in backend or backend flag is set
 748                 $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
 749         }
 750
 751         /**
 752          * Returns true, if the call is from a backend node (f.e. from a worker)
 753          *
 754          * @return bool Is it a known backend?
 755          */
 756         public function isBackend()
 757         {
 758                 return $this->isBackend;
 759         }
 760
 761         /**
 762          * @brief Checks if the maximum number of database processes is reached
 763          *
 764          * @return bool Is the limit reached?
 765          */
 766         public function isMaxProcessesReached()
 767         {
 768                 // Deactivated, needs more investigating if this check really makes sense
 769                 return false;
 770
 771                 /*
 772                  * Commented out to suppress static analyzer issues
 773                  *
 774                 if ($this->is_backend()) {
 775                         $process = 'backend';
 776                         $max_processes = $this->config->get('system', 'max_processes_backend');
 777                         if (intval($max_processes) == 0) {
 778                                 $max_processes = 5;
 779                         }
 780                 } else {
 781                         $process = 'frontend';
 782                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 783                         if (intval($max_processes) == 0) {
 784                                 $max_processes = 20;
 785                         }
 786                 }
 787
 788                 $processlist = DBA::processlist();
 789                 if ($processlist['list'] != '') {
 790                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 791
 792                         if ($processlist['amount'] > $max_processes) {
 793                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 794                                 return true;
 795                         }
 796                 }
 797                 return false;
 798                  */
 799         }
 800
 801         /**
 802          * @brief Checks if the minimal memory is reached
 803          *
 804          * @return bool Is the memory limit reached?
 805          * @throws InternalServerErrorException
 806          */
 807         public function isMinMemoryReached()
 808         {
 809                 $min_memory = $this->config->get('system', 'min_memory', 0);
 810                 if ($min_memory == 0) {
 811                         return false;
 812                 }
 813
 814                 if (!is_readable('/proc/meminfo')) {
 815                         return false;
 816                 }
 817
 818                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 819
 820                 $meminfo = [];
 821                 foreach ($memdata as $line) {
 822                         $data = explode(':', $line);
 823                         if (count($data) != 2) {
 824                                 continue;
 825                         }
 826                         list($key, $val) = $data;
 827                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 828                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 829                 }
 830
 831                 if (!isset($meminfo['MemFree'])) {
 832                         return false;
 833                 }
 834
 835                 $free = $meminfo['MemFree'];
 836
 837                 $reached = ($free < $min_memory);
 838
 839                 if ($reached) {
 840                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 841                 }
 842
 843                 return $reached;
 844         }
 845
 846         /**
 847          * @brief Checks if the maximum load is reached
 848          *
 849          * @return bool Is the load reached?
 850          * @throws InternalServerErrorException
 851          */
 852         public function isMaxLoadReached()
 853         {
 854                 if ($this->isBackend()) {
 855                         $process = 'backend';
 856                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 857                         if ($maxsysload < 1) {
 858                                 $maxsysload = 50;
 859                         }
 860                 } else {
 861                         $process = 'frontend';
 862                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 863                         if ($maxsysload < 1) {
 864                                 $maxsysload = 50;
 865                         }
 866                 }
 867
 868                 $load = Core\System::currentLoad();
 869                 if ($load) {
 870                         if (intval($load) > $maxsysload) {
 871                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 872                                 return true;
 873                         }
 874                 }
 875                 return false;
 876         }
 877
 878         /**
 879          * Executes a child process with 'proc_open'
 880          *
 881          * @param string $command The command to execute
 882          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 883          * @throws InternalServerErrorException
 884          */
 885         public function proc_run($command, $args)
 886         {
 887                 if (!function_exists('proc_open')) {
 888                         return;
 889                 }
 890
 891                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 892
 893                 foreach ($args as $key => $value) {
 894                         if (!is_null($value) && is_bool($value) && !$value) {
 895                                 continue;
 896                         }
 897
 898                         $cmdline .= ' --' . $key;
 899                         if (!is_null($value) && !is_bool($value)) {
 900                                 $cmdline .= ' ' . $value;
 901                         }
 902                 }
 903
 904                 if ($this->isMinMemoryReached()) {
 905                         return;
 906                 }
 907
 908                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 909                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 910                 } else {
 911                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 912                 }
 913                 if (!is_resource($resource)) {
 914                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 915                         return;
 916                 }
 917                 proc_close($resource);
 918         }
 919
 920         /**
 921          * Generates the site's default sender email address
 922          *
 923          * @return string
 924          * @throws InternalServerErrorException
 925          */
 926         public function getSenderEmailAddress()
 927         {
 928                 $sender_email = $this->config->get('config', 'sender_email');
 929                 if (empty($sender_email)) {
 930                         $hostname = $this->getHostName();
 931                         if (strpos($hostname, ':')) {
 932                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 933                         }
 934
 935                         $sender_email = 'noreply@' . $hostname;
 936                 }
 937
 938                 return $sender_email;
 939         }
 940
 941         /**
 942          * Returns the current theme name.
 943          *
 944          * @return string the name of the current theme
 945          * @throws InternalServerErrorException
 946          */
 947         public function getCurrentTheme()
 948         {
 949                 if ($this->getMode()->isInstall()) {
 950                         return '';
 951                 }
 952
 953                 if (!$this->currentTheme) {
 954                         $this->computeCurrentTheme();
 955                 }
 956
 957                 return $this->currentTheme;
 958         }
 959
 960         public function setCurrentTheme($theme)
 961         {
 962                 $this->currentTheme = $theme;
 963         }
 964
 965         /**
 966          * Computes the current theme name based on the node settings, the user settings and the device type
 967          *
 968          * @throws Exception
 969          */
 970         private function computeCurrentTheme()
 971         {
 972                 $system_theme = $this->config->get('system', 'theme');
 973                 if (!$system_theme) {
 974                         throw new Exception(Core\L10n::t('No system theme config value set.'));
 975                 }
 976
 977                 // Sane default
 978                 $this->currentTheme = $system_theme;
 979
 980                 $allowed_themes = explode(',', $this->config->get('system', 'allowed_themes', $system_theme));
 981
 982                 $page_theme = null;
 983                 // Find the theme that belongs to the user whose stuff we are looking at
 984                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 985                         // Allow folks to override user themes and always use their own on their own site.
 986                         // This works only if the user is on the same server
 987                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 988                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 989                                 $page_theme = $user['theme'];
 990                         }
 991                 }
 992
 993                 $user_theme = Core\Session::get('theme', $system_theme);
 994
 995                 // Specific mobile theme override
 996                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 997                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 998                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 999
1000                         // --- means same mobile theme as desktop
1001                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
1002                                 $user_theme = $user_mobile_theme;
1003                         }
1004                 }
1005
1006                 if ($page_theme) {
1007                         $theme_name = $page_theme;
1008                 } else {
1009                         $theme_name = $user_theme;
1010                 }
1011
1012                 if ($theme_name
1013                         && in_array($theme_name, $allowed_themes)
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);
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                         $privateapps = $this->config->get('config', 'private_addons', false);
1252                         if (Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1253                                 //Check if module is an app and if public access to apps is allowed or not
1254                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1255                                         info(Core\L10n::t("You must be logged in to use addons. "));
1256                                 } else {
1257                                         include_once "addon/{$this->module}/{$this->module}.php";
1258                                         if (function_exists($this->module . '_module')) {
1259                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1260                                                 $this->module_class = 'Friendica\\LegacyModule';
1261                                                 $this->module_loaded = true;
1262                                         }
1263                                 }
1264                         }
1265
1266                         // Controller class routing
1267                         if (! $this->module_loaded && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
1268                                 $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
1269                                 $this->module_loaded = true;
1270                         }
1271
1272                         /* If not, next look for a 'standard' program module in the 'mod' directory
1273                          * We emulate a Module class through the LegacyModule class
1274                          */
1275                         if (! $this->module_loaded && file_exists("mod/{$this->module}.php")) {
1276                                 LegacyModule::setModuleFile("mod/{$this->module}.php");
1277                                 $this->module_class = 'Friendica\\LegacyModule';
1278                                 $this->module_loaded = true;
1279                         }
1280
1281                         /* The URL provided does not resolve to a valid module.
1282                          *
1283                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1284                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1285                          * 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
1286                          * this will often succeed and eventually do the right thing.
1287                          *
1288                          * Otherwise we are going to emit a 404 not found.
1289                          */
1290                         if (! $this->module_loaded) {
1291                                 // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
1292                                 if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
1293                                         exit();
1294                                 }
1295
1296                                 if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
1297                                         Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
1298                                         $this->internalRedirect($_SERVER['REQUEST_URI']);
1299                                 }
1300
1301                                 Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1302
1303                                 header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
1304                                 $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
1305                                 $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
1306                                         '$message' =>  Core\L10n::t('Page not found.')
1307                                 ]);
1308                         }
1309                 }
1310
1311                 $content = '';
1312
1313                 // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1314                 if ($this->module_loaded) {
1315                         $this->page['page_title'] = $this->module;
1316                         $placeholder = '';
1317
1318                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1319
1320                         call_user_func([$this->module_class, 'init']);
1321
1322                         // "rawContent" is especially meant for technical endpoints.
1323                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1324                         if (!$this->error) {
1325                                 call_user_func([$this->module_class, 'rawContent']);
1326                         }
1327                 }
1328
1329                 // Load current theme info after module has been initialized as theme could have been set in module
1330                 $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1331                 if (file_exists($theme_info_file)) {
1332                         require_once $theme_info_file;
1333                 }
1334
1335                 if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1336                         $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1337                         $func($this);
1338                 }
1339
1340                 if ($this->module_loaded) {
1341                         if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
1342                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1343                                 call_user_func([$this->module_class, 'post']);
1344                         }
1345
1346                         if (! $this->error) {
1347                                 Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1348                                 call_user_func([$this->module_class, 'afterpost']);
1349                         }
1350
1351                         if (! $this->error) {
1352                                 $arr = ['content' => $content];
1353                                 Core\Hook::callAll($this->module . '_mod_content', $arr);
1354                                 $content = $arr['content'];
1355                                 $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1356                                 Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1357                                 $content .= $arr['content'];
1358                         }
1359                 }
1360
1361                 // initialise content region
1362                 if ($this->getMode()->isNormal()) {
1363                         Core\Hook::callAll('page_content_top', $this->page['content']);
1364                 }
1365
1366                 $this->page['content'] .= $content;
1367
1368                 /* Create the page head after setting the language
1369                  * and getting any auth credentials.
1370                  *
1371                  * Moved initHead() and initFooter() to after
1372                  * all the module functions have executed so that all
1373                  * theme choices made by the modules can take effect.
1374                  */
1375                 $this->initHead();
1376
1377                 /* Build the page ending -- this is stuff that goes right before
1378                  * the closing </body> tag
1379                  */
1380                 $this->initFooter();
1381
1382                 /* now that we've been through the module content, see if the page reported
1383                  * a permission problem and if so, a 403 response would seem to be in order.
1384                  */
1385                 if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
1386                         header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
1387                 }
1388
1389                 // Report anything which needs to be communicated in the notification area (before the main body)
1390                 Core\Hook::callAll('page_end', $this->page['content']);
1391
1392                 // Add the navigation (menu) template
1393                 if ($this->module != 'install' && $this->module != 'maintenance') {
1394                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1395                         $this->page['nav']       = Content\Nav::build($this);
1396                 }
1397
1398                 // Build the page - now that we have all the components
1399                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1400                         $doc = new DOMDocument();
1401
1402                         $target = new DOMDocument();
1403                         $target->loadXML("<root></root>");
1404
1405                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1406
1407                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1408                         @$doc->loadHTML($content);
1409
1410                         $xpath = new DOMXPath($doc);
1411
1412                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1413
1414                         foreach ($list as $item) {
1415                                 $item = $target->importNode($item, true);
1416
1417                                 // And then append it to the target
1418                                 $target->documentElement->appendChild($item);
1419                         }
1420
1421                         if ($_GET["mode"] == "raw") {
1422                                 header("Content-type: text/html; charset=utf-8");
1423
1424                                 echo substr($target->saveHTML(), 6, -8);
1425
1426                                 exit();
1427                         }
1428                 }
1429
1430                 $page    = $this->page;
1431                 $profile = $this->profile;
1432
1433                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1434                 header("Content-type: text/html; charset=utf-8");
1435
1436                 if ($this->config->get('system', 'hsts') && ($this->config->get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
1437                         header("Strict-Transport-Security: max-age=31536000");
1438                 }
1439
1440                 // Some security stuff
1441                 header('X-Content-Type-Options: nosniff');
1442                 header('X-XSS-Protection: 1; mode=block');
1443                 header('X-Permitted-Cross-Domain-Policies: none');
1444                 header('X-Frame-Options: sameorigin');
1445
1446                 // Things like embedded OSM maps don't work, when this is enabled
1447                 // 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'");
1448
1449                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1450                  * to load another page template than the default one.
1451                  * The page templates are located in /view/php/ or in the theme directory.
1452                  */
1453                 if (isset($_GET["mode"])) {
1454                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1455                 }
1456
1457                 // If there is no page template use the default page template
1458                 if (empty($template)) {
1459                         $template = Core\Theme::getPathForFile("default.php");
1460                 }
1461
1462                 // Theme templates expect $a as an App instance
1463                 $a = $this;
1464
1465                 // Used as is in view/php/default.php
1466                 $lang = Core\L10n::getCurrentLang();
1467
1468                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1469                 require_once $template;
1470         }
1471
1472         /**
1473          * Redirects to another module relative to the current Friendica base.
1474          * If you want to redirect to a external URL, use System::externalRedirectTo()
1475          *
1476          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1477          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1478          *
1479          * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
1480          */
1481         public function internalRedirect($toUrl = '', $ssl = false)
1482         {
1483                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1484                         throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1485                 }
1486
1487                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1488                 Core\System::externalRedirect($redirectTo);
1489         }
1490
1491         /**
1492          * Automatically redirects to relative or absolute URL
1493          * Should only be used if it isn't clear if the URL is either internal or external
1494          *
1495          * @param string $toUrl The target URL
1496          * @throws InternalServerErrorException
1497          */
1498         public function redirect($toUrl)
1499         {
1500                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1501                         Core\System::externalRedirect($toUrl);
1502                 } else {
1503                         $this->internalRedirect($toUrl);
1504                 }
1505         }
1506 }