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\ConfigCache;
  12 use Friendica\Core\Config\ConfigCacheLoader;
  13 use Friendica\Database\DBA;
  14 use Friendica\Factory\ConfigFactory;
  15 use Friendica\Network\HTTPException\InternalServerErrorException;
  16 use Friendica\Util\Profiler;
  17 use Psr\Log\LoggerInterface;
  18
  19 /**
  20  *
  21  * class: App
  22  *
  23  * @brief Our main application structure for the life of this page.
  24  *
  25  * Primarily deals with the URL that got us here
  26  * and tries to make some sense of it, and
  27  * stores our page contents and config storage
  28  * and anything else that might need to be passed around
  29  * before we spit the page out.
  30  *
  31  */
  32 class App
  33 {
  34         public $module_loaded = false;
  35         public $module_class = null;
  36         public $query_string = '';
  37         public $page = [];
  38         public $profile;
  39         public $profile_uid;
  40         public $user;
  41         public $cid;
  42         public $contact;
  43         public $contacts;
  44         public $page_contact;
  45         public $content;
  46         public $data = [];
  47         public $error = false;
  48         public $cmd = '';
  49         public $argv;
  50         public $argc;
  51         public $module;
  52         public $timezone;
  53         public $interactive = true;
  54         public $identities;
  55         public $is_mobile = false;
  56         public $is_tablet = false;
  57         public $theme_info = [];
  58         public $category;
  59         // Allow themes to control internal parameters
  60         // by changing App values in theme.php
  61
  62         public $sourcename = '';
  63         public $videowidth = 425;
  64         public $videoheight = 350;
  65         public $force_max_items = 0;
  66         public $theme_events_in_profile = true;
  67
  68         public $stylesheets = [];
  69         public $footerScripts = [];
  70
  71         /**
  72          * @var App\Mode The Mode of the Application
  73          */
  74         private $mode;
  75
  76         /**
  77          * @var string The App base path
  78          */
  79         private $basePath;
  80
  81         /**
  82          * @var string The App URL path
  83          */
  84         private $urlPath;
  85
  86         /**
  87          * @var bool true, if the call is from the Friendica APP, otherwise false
  88          */
  89         private $isFriendicaApp;
  90
  91         /**
  92          * @var bool true, if the call is from an backend node (f.e. worker)
  93          */
  94         private $isBackend;
  95
  96         /**
  97          * @var string The name of the current theme
  98          */
  99         private $currentTheme;
 100
 101         /**
 102          * @var bool check if request was an AJAX (xmlhttprequest) request
 103          */
 104         private $isAjax;
 105
 106         /**
 107          * @var MobileDetect
 108          */
 109         public $mobileDetect;
 110
 111         /**
 112          * @var LoggerInterface The current logger of this App
 113          */
 114         private $logger;
 115
 116         /**
 117          * @var ConfigCache The cached config
 118          */
 119         private $config;
 120
 121         /**
 122          * @var Profiler The profiler of this app
 123          */
 124         private $profiler;
 125
 126         /**
 127          * Returns the current config cache of this node
 128          *
 129          * @return ConfigCache
 130          */
 131         public function getConfig()
 132         {
 133                 return $this->config;
 134         }
 135
 136         /**
 137          * The basepath of this app
 138          *
 139          * @return string
 140          */
 141         public function getBasePath()
 142         {
 143                 return $this->basePath;
 144         }
 145
 146         /**
 147          * The profiler of this app
 148          *
 149          * @return Profiler
 150          */
 151         public function getProfiler()
 152         {
 153                 return $this->profiler;
 154         }
 155
 156         /**
 157          * Register a stylesheet file path to be included in the <head> tag of every page.
 158          * Inclusion is done in App->initHead().
 159          * The path can be absolute or relative to the Friendica installation base folder.
 160          *
 161          * @see initHead()
 162          *
 163          * @param string $path
 164          * @throws InternalServerErrorException
 165          */
 166         public function registerStylesheet($path)
 167         {
 168                 $url = str_replace($this->basePath . DIRECTORY_SEPARATOR, '', $path);
 169
 170                 $this->stylesheets[] = trim($url, '/');
 171         }
 172
 173         /**
 174          * Register a javascript file path to be included in the <footer> tag of every page.
 175          * Inclusion is done in App->initFooter().
 176          * The path can be absolute or relative to the Friendica installation base folder.
 177          *
 178          * @see initFooter()
 179          *
 180          * @param string $path
 181          * @throws InternalServerErrorException
 182          */
 183         public function registerFooterScript($path)
 184         {
 185                 $url = str_replace($this->basePath . DIRECTORY_SEPARATOR, '', $path);
 186
 187                 $this->footerScripts[] = trim($url, '/');
 188         }
 189
 190         public $process_id;
 191         public $queue;
 192         private $scheme;
 193         private $hostname;
 194
 195         /**
 196          * @brief App constructor.
 197          *
 198          * @param ConfigCache      $config    The Cached Config
 199          * @param LoggerInterface  $logger    Logger of this application
 200          * @param Profiler         $profiler  The profiler of this application
 201          * @param bool             $isBackend Whether it is used for backend or frontend (Default true=backend)
 202          *
 203          * @throws Exception if the Basepath is not usable
 204          */
 205         public function __construct(ConfigCache $config, LoggerInterface $logger, Profiler $profiler, $isBackend = true)
 206         {
 207                 $this->config   = $config;
 208                 $this->logger   = $logger;
 209                 $this->profiler = $profiler;
 210                 $this->basePath = $this->config->get('system', 'basepath');
 211
 212                 if (!Core\System::isDirectoryUsable($this->basePath, false)) {
 213                         throw new Exception('Basepath ' . $this->basePath . ' isn\'t usable.');
 214                 }
 215                 $this->basePath = rtrim($this->basePath, DIRECTORY_SEPARATOR);
 216
 217                 BaseObject::setApp($this);
 218
 219                 $this->checkBackend($isBackend);
 220                 $this->checkFriendicaApp();
 221
 222                 $this->profiler->reset();
 223
 224                 $this->mode = new App\Mode($this->basePath);
 225
 226                 $this->reload();
 227
 228                 set_time_limit(0);
 229
 230                 // This has to be quite large to deal with embedded private photos
 231                 ini_set('pcre.backtrack_limit', 500000);
 232
 233                 $this->scheme = 'http';
 234
 235                 if (!empty($_SERVER['HTTPS']) ||
 236                         !empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
 237                         !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
 238                         !empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
 239                         !empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
 240                         !empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
 241                 ) {
 242                         $this->scheme = 'https';
 243                 }
 244
 245                 if (!empty($_SERVER['SERVER_NAME'])) {
 246                         $this->hostname = $_SERVER['SERVER_NAME'];
 247
 248                         if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
 249                                 $this->hostname .= ':' . $_SERVER['SERVER_PORT'];
 250                         }
 251                 }
 252
 253                 set_include_path(
 254                         get_include_path() . PATH_SEPARATOR
 255                         . $this->basePath . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 256                         . $this->basePath . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 257                         . $this->basePath);
 258
 259                 if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
 260                         $this->query_string = substr($_SERVER['QUERY_STRING'], 9);
 261                 } elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
 262                         $this->query_string = substr($_SERVER['QUERY_STRING'], 2);
 263                 }
 264
 265                 // removing trailing / - maybe a nginx problem
 266                 $this->query_string = ltrim($this->query_string, '/');
 267
 268                 if (!empty($_GET['pagename'])) {
 269                         $this->cmd = trim($_GET['pagename'], '/\\');
 270                 } elseif (!empty($_GET['q'])) {
 271                         $this->cmd = trim($_GET['q'], '/\\');
 272                 }
 273
 274                 // fix query_string
 275                 $this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
 276
 277                 // unix style "homedir"
 278                 if (substr($this->cmd, 0, 1) === '~') {
 279                         $this->cmd = 'profile/' . substr($this->cmd, 1);
 280                 }
 281
 282                 // Diaspora style profile url
 283                 if (substr($this->cmd, 0, 2) === 'u/') {
 284                         $this->cmd = 'profile/' . substr($this->cmd, 2);
 285                 }
 286
 287                 /*
 288                  * Break the URL path into C style argc/argv style arguments for our
 289                  * modules. Given "http://example.com/module/arg1/arg2", $this->argc
 290                  * will be 3 (integer) and $this->argv will contain:
 291                  *   [0] => 'module'
 292                  *   [1] => 'arg1'
 293                  *   [2] => 'arg2'
 294                  *
 295                  *
 296                  * There will always be one argument. If provided a naked domain
 297                  * URL, $this->argv[0] is set to "home".
 298                  */
 299
 300                 $this->argv = explode('/', $this->cmd);
 301                 $this->argc = count($this->argv);
 302                 if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
 303                         $this->module = str_replace('.', '_', $this->argv[0]);
 304                         $this->module = str_replace('-', '_', $this->module);
 305                 } else {
 306                         $this->argc = 1;
 307                         $this->argv = ['home'];
 308                         $this->module = 'home';
 309                 }
 310
 311                 // Detect mobile devices
 312                 $mobile_detect = new MobileDetect();
 313
 314                 $this->mobileDetect = $mobile_detect;
 315
 316                 $this->is_mobile = $mobile_detect->isMobile();
 317                 $this->is_tablet = $mobile_detect->isTablet();
 318
 319                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 320
 321                 // Register template engines
 322                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 323         }
 324
 325         /**
 326          * Returns the Mode of the Application
 327          *
 328          * @return App\Mode The Application Mode
 329          *
 330          * @throws InternalServerErrorException when the mode isn't created
 331          */
 332         public function getMode()
 333         {
 334                 if (empty($this->mode)) {
 335                         throw new InternalServerErrorException('Mode of the Application is not defined');
 336                 }
 337
 338                 return $this->mode;
 339         }
 340
 341         /**
 342          * Returns the Logger of the Application
 343          *
 344          * @return LoggerInterface The Logger
 345          * @throws InternalServerErrorException when the logger isn't created
 346          */
 347         public function getLogger()
 348         {
 349                 if (empty($this->logger)) {
 350                         throw new InternalServerErrorException('Logger of the Application is not defined');
 351                 }
 352
 353                 return $this->logger;
 354         }
 355
 356         /**
 357          * Reloads the whole app instance
 358          */
 359         public function reload()
 360         {
 361                 Core\Config::init($this->config);
 362                 Core\PConfig::init($this->config);
 363
 364                 $this->loadDatabase();
 365
 366                 $this->getMode()->determine($this->basePath);
 367
 368                 $this->determineURLPath();
 369
 370                 if ($this->getMode()->has(App\Mode::DBCONFIGAVAILABLE)) {
 371                         $adapterType = $this->config->get('system', 'config_adapter');
 372                         $adapter = ConfigFactory::createConfig($adapterType, $this->config);
 373                         Core\Config::setAdapter($adapter);
 374                         $adapterP = ConfigFactory::createPConfig($adapterType, $this->config);
 375                         Core\PConfig::setAdapter($adapterP);
 376                         Core\Config::load();
 377                 }
 378
 379                 // again because DB-config could change the config
 380                 $this->getMode()->determine($this->basePath);
 381
 382                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 383                         Core\Hook::loadHooks();
 384                         $loader = new ConfigCacheLoader($this->basePath);
 385                         Core\Hook::callAll('load_config', $loader);
 386                         $this->config->loadConfigArray($loader->loadCoreConfig('addon'), true);
 387                 }
 388
 389                 $this->loadDefaultTimezone();
 390
 391                 Core\L10n::init();
 392
 393                 $this->process_id = Core\System::processID('log');
 394
 395                 Core\Logger::setLogger($this->logger);
 396         }
 397
 398         /**
 399          * Loads the default timezone
 400          *
 401          * Include support for legacy $default_timezone
 402          *
 403          * @global string $default_timezone
 404          */
 405         private function loadDefaultTimezone()
 406         {
 407                 if ($this->config->get('system', 'default_timezone')) {
 408                         $this->timezone = $this->config->get('system', 'default_timezone');
 409                 } else {
 410                         global $default_timezone;
 411                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 412                 }
 413
 414                 if ($this->timezone) {
 415                         date_default_timezone_set($this->timezone);
 416                 }
 417         }
 418
 419         /**
 420          * Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
 421          */
 422         private function determineURLPath()
 423         {
 424                 /* Relative script path to the web server root
 425                  * Not all of those $_SERVER properties can be present, so we do by inverse priority order
 426                  */
 427                 $relative_script_path = '';
 428                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URL'       , $relative_script_path);
 429                 $relative_script_path = defaults($_SERVER, 'REDIRECT_URI'       , $relative_script_path);
 430                 $relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
 431                 $relative_script_path = defaults($_SERVER, 'SCRIPT_URL'         , $relative_script_path);
 432                 $relative_script_path = defaults($_SERVER, 'REQUEST_URI'        , $relative_script_path);
 433
 434                 $this->urlPath = $this->config->get('system', 'urlpath');
 435
 436                 /* $relative_script_path gives /relative/path/to/friendica/module/parameter
 437                  * QUERY_STRING gives pagename=module/parameter
 438                  *
 439                  * To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
 440                  */
 441                 if (!empty($relative_script_path)) {
 442                         // Module
 443                         if (!empty($_SERVER['QUERY_STRING'])) {
 444                                 $path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
 445                         } else {
 446                                 // Root page
 447                                 $path = trim($relative_script_path, '/');
 448                         }
 449
 450                         if ($path && $path != $this->urlPath) {
 451                                 $this->urlPath = $path;
 452                         }
 453                 }
 454         }
 455
 456         public function loadDatabase()
 457         {
 458                 if (DBA::connected()) {
 459                         return;
 460                 }
 461
 462                 $db_host = $this->config->get('database', 'hostname');
 463                 $db_user = $this->config->get('database', 'username');
 464                 $db_pass = $this->config->get('database', 'password');
 465                 $db_data = $this->config->get('database', 'database');
 466                 $charset = $this->config->get('database', 'charset');
 467
 468                 // Use environment variables for mysql if they are set beforehand
 469                 if (!empty(getenv('MYSQL_HOST'))
 470                         && !empty(getenv('MYSQL_USERNAME') || !empty(getenv('MYSQL_USER')))
 471                         && getenv('MYSQL_PASSWORD') !== false
 472                         && !empty(getenv('MYSQL_DATABASE')))
 473                 {
 474                         $db_host = getenv('MYSQL_HOST');
 475                         if (!empty(getenv('MYSQL_PORT'))) {
 476                                 $db_host .= ':' . getenv('MYSQL_PORT');
 477                         }
 478                         if (!empty(getenv('MYSQL_USERNAME'))) {
 479                                 $db_user = getenv('MYSQL_USERNAME');
 480                         } else {
 481                                 $db_user = getenv('MYSQL_USER');
 482                         }
 483                         $db_pass = (string) getenv('MYSQL_PASSWORD');
 484                         $db_data = getenv('MYSQL_DATABASE');
 485                 }
 486
 487                 $stamp1 = microtime(true);
 488
 489                 if (DBA::connect($this->config, $this->profiler, $db_host, $db_user, $db_pass, $db_data, $charset)) {
 490                         // Loads DB_UPDATE_VERSION constant
 491                         Database\DBStructure::definition($this->basePath, false);
 492                 }
 493
 494                 unset($db_host, $db_user, $db_pass, $db_data, $charset);
 495
 496                 $this->profiler->saveTimestamp($stamp1, 'network', Core\System::callstack());
 497         }
 498
 499         public function getScheme()
 500         {
 501                 return $this->scheme;
 502         }
 503
 504         /**
 505          * @brief Retrieves the Friendica instance base URL
 506          *
 507          * This function assembles the base URL from multiple parts:
 508          * - Protocol is determined either by the request or a combination of
 509          * system.ssl_policy and the $ssl parameter.
 510          * - Host name is determined either by system.hostname or inferred from request
 511          * - Path is inferred from SCRIPT_NAME
 512          *
 513          * Note: $ssl parameter value doesn't directly correlate with the resulting protocol
 514          *
 515          * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
 516          * @return string Friendica server base URL
 517          * @throws InternalServerErrorException
 518          */
 519         public function getBaseURL($ssl = false)
 520         {
 521                 $scheme = $this->scheme;
 522
 523                 if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
 524                         $scheme = 'https';
 525                 }
 526
 527                 //      Basically, we have $ssl = true on any links which can only be seen by a logged in user
 528                 //      (and also the login link). Anything seen by an outsider will have it turned off.
 529
 530                 if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
 531                         if ($ssl) {
 532                                 $scheme = 'https';
 533                         } else {
 534                                 $scheme = 'http';
 535                         }
 536                 }
 537
 538                 if (Core\Config::get('config', 'hostname') != '') {
 539                         $this->hostname = Core\Config::get('config', 'hostname');
 540                 }
 541
 542                 return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
 543         }
 544
 545         /**
 546          * @brief Initializes the baseurl components
 547          *
 548          * Clears the baseurl cache to prevent inconsistencies
 549          *
 550          * @param string $url
 551          * @throws InternalServerErrorException
 552          */
 553         public function setBaseURL($url)
 554         {
 555                 $parsed = @parse_url($url);
 556                 $hostname = '';
 557
 558                 if (!empty($parsed)) {
 559                         if (!empty($parsed['scheme'])) {
 560                                 $this->scheme = $parsed['scheme'];
 561                         }
 562
 563                         if (!empty($parsed['host'])) {
 564                                 $hostname = $parsed['host'];
 565                         }
 566
 567                         if (!empty($parsed['port'])) {
 568                                 $hostname .= ':' . $parsed['port'];
 569                         }
 570                         if (!empty($parsed['path'])) {
 571                                 $this->urlPath = trim($parsed['path'], '\\/');
 572                         }
 573
 574                         if (file_exists($this->basePath . '/.htpreconfig.php')) {
 575                                 include $this->basePath . '/.htpreconfig.php';
 576                         }
 577
 578                         if (Core\Config::get('config', 'hostname') != '') {
 579                                 $this->hostname = Core\Config::get('config', 'hostname');
 580                         }
 581
 582                         if (!isset($this->hostname) || ($this->hostname == '')) {
 583                                 $this->hostname = $hostname;
 584                         }
 585                 }
 586         }
 587
 588         public function getHostName()
 589         {
 590                 if (Core\Config::get('config', 'hostname') != '') {
 591                         $this->hostname = Core\Config::get('config', 'hostname');
 592                 }
 593
 594                 return $this->hostname;
 595         }
 596
 597         public function getURLPath()
 598         {
 599                 return $this->urlPath;
 600         }
 601
 602         /**
 603          * Initializes App->page['htmlhead'].
 604          *
 605          * Includes:
 606          * - Page title
 607          * - Favicons
 608          * - Registered stylesheets (through App->registerStylesheet())
 609          * - Infinite scroll data
 610          * - head.tpl template
 611          */
 612         public function initHead()
 613         {
 614                 $interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
 615
 616                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 617                 if ($interval < 0) {
 618                         $interval = 2147483647;
 619                 }
 620
 621                 if ($interval < 10000) {
 622                         $interval = 40000;
 623                 }
 624
 625                 // compose the page title from the sitename and the
 626                 // current module called
 627                 if (!$this->module == '') {
 628                         $this->page['title'] = $this->config->get('config', 'sitename') . ' (' . $this->module . ')';
 629                 } else {
 630                         $this->page['title'] = $this->config->get('config', 'sitename');
 631                 }
 632
 633                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 634                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 635                 } else {
 636                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 637                 }
 638
 639                 $this->registerStylesheet($stylesheet);
 640
 641                 $shortcut_icon = Core\Config::get('system', 'shortcut_icon');
 642                 if ($shortcut_icon == '') {
 643                         $shortcut_icon = 'images/friendica-32.png';
 644                 }
 645
 646                 $touch_icon = Core\Config::get('system', 'touch_icon');
 647                 if ($touch_icon == '') {
 648                         $touch_icon = 'images/friendica-128.png';
 649                 }
 650
 651                 Core\Hook::callAll('head', $this->page['htmlhead']);
 652
 653                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 654                 /* put the head template at the beginning of page['htmlhead']
 655                  * since the code added by the modules frequently depends on it
 656                  * being first
 657                  */
 658                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 659                         '$baseurl'         => $this->getBaseURL(),
 660                         '$local_user'      => local_user(),
 661                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 662                         '$delitem'         => Core\L10n::t('Delete this item?'),
 663                         '$showmore'        => Core\L10n::t('show more'),
 664                         '$showfewer'       => Core\L10n::t('show fewer'),
 665                         '$update_interval' => $interval,
 666                         '$shortcut_icon'   => $shortcut_icon,
 667                         '$touch_icon'      => $touch_icon,
 668                         '$block_public'    => intval(Core\Config::get('system', 'block_public')),
 669                         '$stylesheets'     => $this->stylesheets,
 670                 ]) . $this->page['htmlhead'];
 671         }
 672
 673         /**
 674          * Initializes App->page['footer'].
 675          *
 676          * Includes:
 677          * - Javascript homebase
 678          * - Mobile toggle link
 679          * - Registered footer scripts (through App->registerFooterScript())
 680          * - footer.tpl template
 681          */
 682         public function initFooter()
 683         {
 684                 // If you're just visiting, let javascript take you home
 685                 if (!empty($_SESSION['visitor_home'])) {
 686                         $homebase = $_SESSION['visitor_home'];
 687                 } elseif (local_user()) {
 688                         $homebase = 'profile/' . $this->user['nickname'];
 689                 }
 690
 691                 if (isset($homebase)) {
 692                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 693                 }
 694
 695                 /*
 696                  * Add a "toggle mobile" link if we're using a mobile device
 697                  */
 698                 if ($this->is_mobile || $this->is_tablet) {
 699                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 700                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 701                         } else {
 702                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 703                         }
 704                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 705                                 '$toggle_link' => $link,
 706                                 '$toggle_text' => Core\L10n::t('toggle mobile')
 707                         ]);
 708                 }
 709
 710                 Core\Hook::callAll('footer', $this->page['footer']);
 711
 712                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 713                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 714                         '$baseurl' => $this->getBaseURL(),
 715                         '$footerScripts' => $this->footerScripts,
 716                 ]) . $this->page['footer'];
 717         }
 718
 719         /**
 720          * @brief Removes the base url from an url. This avoids some mixed content problems.
 721          *
 722          * @param string $origURL
 723          *
 724          * @return string The cleaned url
 725          * @throws InternalServerErrorException
 726          */
 727         public function removeBaseURL($origURL)
 728         {
 729                 // Remove the hostname from the url if it is an internal link
 730                 $nurl = Util\Strings::normaliseLink($origURL);
 731                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 732                 $url = str_replace($base . '/', '', $nurl);
 733
 734                 // if it is an external link return the orignal value
 735                 if ($url == Util\Strings::normaliseLink($origURL)) {
 736                         return $origURL;
 737                 } else {
 738                         return $url;
 739                 }
 740         }
 741
 742         /**
 743          * Returns the current UserAgent as a String
 744          *
 745          * @return string the UserAgent as a String
 746          * @throws InternalServerErrorException
 747          */
 748         public function getUserAgent()
 749         {
 750                 return
 751                         FRIENDICA_PLATFORM . " '" .
 752                         FRIENDICA_CODENAME . "' " .
 753                         FRIENDICA_VERSION . '-' .
 754                         DB_UPDATE_VERSION . '; ' .
 755                         $this->getBaseURL();
 756         }
 757
 758         /**
 759          * Checks, if the call is from the Friendica App
 760          *
 761          * Reason:
 762          * The friendica client has problems with the GUID in the notify. this is some workaround
 763          */
 764         private function checkFriendicaApp()
 765         {
 766                 // Friendica-Client
 767                 $this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
 768         }
 769
 770         /**
 771          *      Is the call via the Friendica app? (not a "normale" call)
 772          *
 773          * @return bool true if it's from the Friendica app
 774          */
 775         public function isFriendicaApp()
 776         {
 777                 return $this->isFriendicaApp;
 778         }
 779
 780         /**
 781          * @brief Checks if the site is called via a backend process
 782          *
 783          * This isn't a perfect solution. But we need this check very early.
 784          * So we cannot wait until the modules are loaded.
 785          *
 786          * @param string $backend true, if the backend flag was set during App initialization
 787          *
 788          */
 789         private function checkBackend($backend) {
 790                 static $backends = [
 791                         '_well_known',
 792                         'api',
 793                         'dfrn_notify',
 794                         'fetch',
 795                         'hcard',
 796                         'hostxrd',
 797                         'nodeinfo',
 798                         'noscrape',
 799                         'p',
 800                         'poco',
 801                         'post',
 802                         'proxy',
 803                         'pubsub',
 804                         'pubsubhubbub',
 805                         'receive',
 806                         'rsd_xml',
 807                         'salmon',
 808                         'statistics_json',
 809                         'xrd',
 810                 ];
 811
 812                 // Check if current module is in backend or backend flag is set
 813                 $this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
 814         }
 815
 816         /**
 817          * Returns true, if the call is from a backend node (f.e. from a worker)
 818          *
 819          * @return bool Is it a known backend?
 820          */
 821         public function isBackend()
 822         {
 823                 return $this->isBackend;
 824         }
 825
 826         /**
 827          * @brief Checks if the maximum number of database processes is reached
 828          *
 829          * @return bool Is the limit reached?
 830          */
 831         public function isMaxProcessesReached()
 832         {
 833                 // Deactivated, needs more investigating if this check really makes sense
 834                 return false;
 835
 836                 /*
 837                  * Commented out to suppress static analyzer issues
 838                  *
 839                 if ($this->is_backend()) {
 840                         $process = 'backend';
 841                         $max_processes = Core\Config::get('system', 'max_processes_backend');
 842                         if (intval($max_processes) == 0) {
 843                                 $max_processes = 5;
 844                         }
 845                 } else {
 846                         $process = 'frontend';
 847                         $max_processes = Core\Config::get('system', 'max_processes_frontend');
 848                         if (intval($max_processes) == 0) {
 849                                 $max_processes = 20;
 850                         }
 851                 }
 852
 853                 $processlist = DBA::processlist();
 854                 if ($processlist['list'] != '') {
 855                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 856
 857                         if ($processlist['amount'] > $max_processes) {
 858                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 859                                 return true;
 860                         }
 861                 }
 862                 return false;
 863                  */
 864         }
 865
 866         /**
 867          * @brief Checks if the minimal memory is reached
 868          *
 869          * @return bool Is the memory limit reached?
 870          * @throws InternalServerErrorException
 871          */
 872         public function isMinMemoryReached()
 873         {
 874                 $min_memory = Core\Config::get('system', 'min_memory', 0);
 875                 if ($min_memory == 0) {
 876                         return false;
 877                 }
 878
 879                 if (!is_readable('/proc/meminfo')) {
 880                         return false;
 881                 }
 882
 883                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 884
 885                 $meminfo = [];
 886                 foreach ($memdata as $line) {
 887                         $data = explode(':', $line);
 888                         if (count($data) != 2) {
 889                                 continue;
 890                         }
 891                         list($key, $val) = $data;
 892                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 893                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 894                 }
 895
 896                 if (!isset($meminfo['MemFree'])) {
 897                         return false;
 898                 }
 899
 900                 $free = $meminfo['MemFree'];
 901
 902                 $reached = ($free < $min_memory);
 903
 904                 if ($reached) {
 905                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 906                 }
 907
 908                 return $reached;
 909         }
 910
 911         /**
 912          * @brief Checks if the maximum load is reached
 913          *
 914          * @return bool Is the load reached?
 915          * @throws InternalServerErrorException
 916          */
 917         public function isMaxLoadReached()
 918         {
 919                 if ($this->isBackend()) {
 920                         $process = 'backend';
 921                         $maxsysload = intval(Core\Config::get('system', 'maxloadavg'));
 922                         if ($maxsysload < 1) {
 923                                 $maxsysload = 50;
 924                         }
 925                 } else {
 926                         $process = 'frontend';
 927                         $maxsysload = intval(Core\Config::get('system', 'maxloadavg_frontend'));
 928                         if ($maxsysload < 1) {
 929                                 $maxsysload = 50;
 930                         }
 931                 }
 932
 933                 $load = Core\System::currentLoad();
 934                 if ($load) {
 935                         if (intval($load) > $maxsysload) {
 936                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 937                                 return true;
 938                         }
 939                 }
 940                 return false;
 941         }
 942
 943         /**
 944          * Executes a child process with 'proc_open'
 945          *
 946          * @param string $command The command to execute
 947          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 948          * @throws InternalServerErrorException
 949          */
 950         public function proc_run($command, $args)
 951         {
 952                 if (!function_exists('proc_open')) {
 953                         return;
 954                 }
 955
 956                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 957
 958                 foreach ($args as $key => $value) {
 959                         if (!is_null($value) && is_bool($value) && !$value) {
 960                                 continue;
 961                         }
 962
 963                         $cmdline .= ' --' . $key;
 964                         if (!is_null($value) && !is_bool($value)) {
 965                                 $cmdline .= ' ' . $value;
 966                         }
 967                 }
 968
 969                 if ($this->isMinMemoryReached()) {
 970                         return;
 971                 }
 972
 973                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 974                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->basePath);
 975                 } else {
 976                         $resource = proc_open($cmdline . ' &', [], $foo, $this->basePath);
 977                 }
 978                 if (!is_resource($resource)) {
 979                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 980                         return;
 981                 }
 982                 proc_close($resource);
 983         }
 984
 985         /**
 986          * Generates the site's default sender email address
 987          *
 988          * @return string
 989          * @throws InternalServerErrorException
 990          */
 991         public function getSenderEmailAddress()
 992         {
 993                 $sender_email = Core\Config::get('config', 'sender_email');
 994                 if (empty($sender_email)) {
 995                         $hostname = $this->getHostName();
 996                         if (strpos($hostname, ':')) {
 997                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 998                         }
 999
1000                         $sender_email = 'noreply@' . $hostname;
1001                 }
1002
1003                 return $sender_email;
1004         }
1005
1006         /**
1007          * Returns the current theme name.
1008          *
1009          * @return string the name of the current theme
1010          * @throws InternalServerErrorException
1011          */
1012         public function getCurrentTheme()
1013         {
1014                 if ($this->getMode()->isInstall()) {
1015                         return '';
1016                 }
1017
1018                 if (!$this->currentTheme) {
1019                         $this->computeCurrentTheme();
1020                 }
1021
1022                 return $this->currentTheme;
1023         }
1024
1025         public function setCurrentTheme($theme)
1026         {
1027                 $this->currentTheme = $theme;
1028         }
1029
1030         /**
1031          * Computes the current theme name based on the node settings, the user settings and the device type
1032          *
1033          * @throws Exception
1034          */
1035         private function computeCurrentTheme()
1036         {
1037                 $system_theme = Core\Config::get('system', 'theme');
1038                 if (!$system_theme) {
1039                         throw new Exception(Core\L10n::t('No system theme config value set.'));
1040                 }
1041
1042                 // Sane default
1043                 $this->currentTheme = $system_theme;
1044
1045                 $allowed_themes = explode(',', Core\Config::get('system', 'allowed_themes', $system_theme));
1046
1047                 $page_theme = null;
1048                 // Find the theme that belongs to the user whose stuff we are looking at
1049                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
1050                         // Allow folks to override user themes and always use their own on their own site.
1051                         // This works only if the user is on the same server
1052                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
1053                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
1054                                 $page_theme = $user['theme'];
1055                         }
1056                 }
1057
1058                 $user_theme = Core\Session::get('theme', $system_theme);
1059
1060                 // Specific mobile theme override
1061                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
1062                         $system_mobile_theme = Core\Config::get('system', 'mobile-theme');
1063                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
1064
1065                         // --- means same mobile theme as desktop
1066                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
1067                                 $user_theme = $user_mobile_theme;
1068                         }
1069                 }
1070
1071                 if ($page_theme) {
1072                         $theme_name = $page_theme;
1073                 } else {
1074                         $theme_name = $user_theme;
1075                 }
1076
1077                 if ($theme_name
1078                         && in_array($theme_name, $allowed_themes)
1079                         && (file_exists('view/theme/' . $theme_name . '/style.css')
1080                         || file_exists('view/theme/' . $theme_name . '/style.php'))
1081                 ) {
1082                         $this->currentTheme = $theme_name;
1083                 }
1084         }
1085
1086         /**
1087          * @brief Return full URL to theme which is currently in effect.
1088          *
1089          * Provide a sane default if nothing is chosen or the specified theme does not exist.
1090          *
1091          * @return string
1092          * @throws InternalServerErrorException
1093          */
1094         public function getCurrentThemeStylesheetPath()
1095         {
1096                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
1097         }
1098
1099         /**
1100          * Check if request was an AJAX (xmlhttprequest) request.
1101          *
1102          * @return boolean true if it was an AJAX request
1103          */
1104         public function isAjax()
1105         {
1106                 return $this->isAjax;
1107         }
1108
1109         /**
1110          * Returns the value of a argv key
1111          * TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
1112          *
1113          * @param int $position the position of the argument
1114          * @param mixed $default the default value if not found
1115          *
1116          * @return mixed returns the value of the argument
1117          */
1118         public function getArgumentValue($position, $default = '')
1119         {
1120                 if (array_key_exists($position, $this->argv)) {
1121                         return $this->argv[$position];
1122                 }
1123
1124                 return $default;
1125         }
1126
1127         /**
1128          * Sets the base url for use in cmdline programs which don't have
1129          * $_SERVER variables
1130          */
1131         public function checkURL()
1132         {
1133                 $url = Core\Config::get('system', 'url');
1134
1135                 // if the url isn't set or the stored url is radically different
1136                 // than the currently visited url, store the current value accordingly.
1137                 // "Radically different" ignores common variations such as http vs https
1138                 // and www.example.com vs example.com.
1139                 // We will only change the url to an ip address if there is no existing setting
1140
1141                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->getHostName()))) {
1142                         Core\Config::set('system', 'url', $this->getBaseURL());
1143                 }
1144         }
1145
1146         /**
1147          * Frontend App script
1148          *
1149          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
1150          * request and a representation of the response.
1151          *
1152          * This probably should change to limit the size of this monster method.
1153          */
1154         public function runFrontend()
1155         {
1156                 // Missing DB connection: ERROR
1157                 if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
1158                         Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
1159                 }
1160
1161                 // Max Load Average reached: ERROR
1162                 if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
1163                         header('Retry-After: 120');
1164                         header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
1165
1166                         Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
1167                 }
1168
1169                 if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
1170                         Core\System::httpExit(404);
1171                 }
1172
1173                 if (!$this->getMode()->isInstall()) {
1174                         // Force SSL redirection
1175                         if (Core\Config::get('system', 'force_ssl') && ($this->getScheme() == "http")
1176                                 && intval(Core\Config::get('system', 'ssl_policy')) == SSL_POLICY_FULL
1177                                 && strpos($this->getBaseURL(), 'https://') === 0
1178                                 && $_SERVER['REQUEST_METHOD'] == 'GET') {
1179                                 header('HTTP/1.1 302 Moved Temporarily');
1180                                 header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
1181                                 exit();
1182                         }
1183
1184                         Core\Session::init();
1185                         Core\Hook::callAll('init_1');
1186                 }
1187
1188                 // Exclude the backend processes from the session management
1189                 if (!$this->isBackend()) {
1190                         $stamp1 = microtime(true);
1191                         session_start();
1192                         $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
1193                         Core\L10n::setSessionVariable();
1194                         Core\L10n::setLangFromSession();
1195                 } else {
1196                         $_SESSION = [];
1197                         Core\Worker::executeIfIdle();
1198                 }
1199
1200                 // ZRL
1201                 if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
1202                         $this->query_string = Model\Profile::stripZrls($this->query_string);
1203                         if (!local_user()) {
1204                                 // Only continue when the given profile link seems valid
1205                                 // Valid profile links contain a path with "/profile/" and no query parameters
1206                                 if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
1207                                         strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
1208                                         if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
1209                                                 $_SESSION['my_url'] = $_GET['zrl'];
1210                                                 $_SESSION['authenticated'] = 0;
1211                                         }
1212                                         Model\Profile::zrlInit($this);
1213                                 } else {
1214                                         // Someone came with an invalid parameter, maybe as a DDoS attempt
1215                                         // We simply stop processing here
1216                                         Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
1217                                         Core\System::httpExit(403, ['title' => '403 Forbidden']);
1218                                 }
1219                         }
1220                 }
1221
1222                 if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
1223                         $token = $_GET['owt'];
1224                         $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
1225                         Model\Profile::openWebAuthInit($token);
1226                 }
1227
1228                 Module\Login::sessionAuth();
1229
1230                 if (empty($_SESSION['authenticated'])) {
1231                         header('X-Account-Management-Status: none');
1232                 }
1233
1234                 $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
1235                 $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
1236                 $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
1237
1238                 /*
1239                  * check_config() is responsible for running update scripts. These automatically
1240                  * update the DB schema whenever we push a new one out. It also checks to see if
1241                  * any addons have been added or removed and reacts accordingly.
1242                  */
1243
1244                 // in install mode, any url loads install module
1245                 // but we need "view" module for stylesheet
1246                 if ($this->getMode()->isInstall() && $this->module != 'view') {
1247                         $this->module = 'install';
1248                 } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
1249                         $this->module = 'maintenance';
1250                 } else {
1251                         $this->checkURL();
1252                         Core\Update::check($this->basePath, false);
1253                         Core\Addon::loadAddons();
1254                         Core\Hook::loadHooks();
1255                 }
1256
1257                 $this->page = [
1258                         'aside' => '',
1259                         'bottom' => '',
1260                         'content' => '',
1261                         'footer' => '',
1262                         'htmlhead' => '',
1263                         'nav' => '',
1264                         'page_title' => '',
1265                         'right_aside' => '',
1266                         'template' => '',
1267                         'title' => ''
1268                 ];
1269
1270                 if (strlen($this->module)) {
1271                         // Compatibility with the Android Diaspora client
1272                         if ($this->module == 'stream') {
1273                                 $this->internalRedirect('network?f=&order=post');
1274                         }
1275
1276                         if ($this->module == 'conversations') {
1277                                 $this->internalRedirect('message');
1278                         }
1279
1280                         if ($this->module == 'commented') {
1281                                 $this->internalRedirect('network?f=&order=comment');
1282                         }
1283
1284                         if ($this->module == 'liked') {
1285                                 $this->internalRedirect('network?f=&order=comment');
1286                         }
1287
1288                         if ($this->module == 'activity') {
1289                                 $this->internalRedirect('network/?f=&conv=1');
1290                         }
1291
1292                         if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
1293                                 $this->internalRedirect('bookmarklet');
1294                         }
1295
1296                         if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
1297                                 $this->internalRedirect('settings');
1298                         }
1299
1300                         if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
1301                                 $this->internalRedirect('search');
1302                         }
1303
1304                         // Compatibility with the Firefox App
1305                         if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
1306                                 $this->module = "login";
1307                         }
1308
1309                         $privateapps = Core\Config::get('config', 'private_addons', false);
1310                         if (Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
1311                                 //Check if module is an app and if public access to apps is allowed or not
1312                                 if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
1313                                         info(Core\L10n::t("You must be logged in to use addons. "));
1314                                 } else {
1315                                         include_once "addon/{$this->module}/{$this->module}.php";
1316                                         if (function_exists($this->module . '_module')) {
1317                                                 LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
1318                                                 $this->module_class = 'Friendica\\LegacyModule';
1319                                                 $this->module_loaded = true;
1320                                         }
1321                                 }
1322                         }
1323
1324                         // Controller class routing
1325                         if (! $this->module_loaded && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
1326                                 $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
1327                                 $this->module_loaded = true;
1328                         }
1329
1330                         /* If not, next look for a 'standard' program module in the 'mod' directory
1331                          * We emulate a Module class through the LegacyModule class
1332                          */
1333                         if (! $this->module_loaded && file_exists("mod/{$this->module}.php")) {
1334                                 LegacyModule::setModuleFile("mod/{$this->module}.php");
1335                                 $this->module_class = 'Friendica\\LegacyModule';
1336                                 $this->module_loaded = true;
1337                         }
1338
1339                         /* The URL provided does not resolve to a valid module.
1340                          *
1341                          * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
1342                          * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
1343                          * 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
1344                          * this will often succeed and eventually do the right thing.
1345                          *
1346                          * Otherwise we are going to emit a 404 not found.
1347                          */
1348                         if (! $this->module_loaded) {
1349                                 // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
1350                                 if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
1351                                         exit();
1352                                 }
1353
1354                                 if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
1355                                         Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
1356                                         $this->internalRedirect($_SERVER['REQUEST_URI']);
1357                                 }
1358
1359                                 Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
1360
1361                                 header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
1362                                 $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
1363                                 $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
1364                                         '$message' =>  Core\L10n::t('Page not found.')
1365                                 ]);
1366                         }
1367                 }
1368
1369                 $content = '';
1370
1371                 // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1372                 if ($this->module_loaded) {
1373                         $this->page['page_title'] = $this->module;
1374                         $placeholder = '';
1375
1376                         Core\Hook::callAll($this->module . '_mod_init', $placeholder);
1377
1378                         call_user_func([$this->module_class, 'init']);
1379
1380                         // "rawContent" is especially meant for technical endpoints.
1381                         // This endpoint doesn't need any theme initialization or other comparable stuff.
1382                         if (!$this->error) {
1383                                 call_user_func([$this->module_class, 'rawContent']);
1384                         }
1385                 }
1386
1387                 // Load current theme info after module has been initialized as theme could have been set in module
1388                 $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
1389                 if (file_exists($theme_info_file)) {
1390                         require_once $theme_info_file;
1391                 }
1392
1393                 if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
1394                         $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
1395                         $func($this);
1396                 }
1397
1398                 if ($this->module_loaded) {
1399                         if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
1400                                 Core\Hook::callAll($this->module . '_mod_post', $_POST);
1401                                 call_user_func([$this->module_class, 'post']);
1402                         }
1403
1404                         if (! $this->error) {
1405                                 Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
1406                                 call_user_func([$this->module_class, 'afterpost']);
1407                         }
1408
1409                         if (! $this->error) {
1410                                 $arr = ['content' => $content];
1411                                 Core\Hook::callAll($this->module . '_mod_content', $arr);
1412                                 $content = $arr['content'];
1413                                 $arr = ['content' => call_user_func([$this->module_class, 'content'])];
1414                                 Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
1415                                 $content .= $arr['content'];
1416                         }
1417                 }
1418
1419                 // initialise content region
1420                 if ($this->getMode()->isNormal()) {
1421                         Core\Hook::callAll('page_content_top', $this->page['content']);
1422                 }
1423
1424                 $this->page['content'] .= $content;
1425
1426                 /* Create the page head after setting the language
1427                  * and getting any auth credentials.
1428                  *
1429                  * Moved initHead() and initFooter() to after
1430                  * all the module functions have executed so that all
1431                  * theme choices made by the modules can take effect.
1432                  */
1433                 $this->initHead();
1434
1435                 /* Build the page ending -- this is stuff that goes right before
1436                  * the closing </body> tag
1437                  */
1438                 $this->initFooter();
1439
1440                 /* now that we've been through the module content, see if the page reported
1441                  * a permission problem and if so, a 403 response would seem to be in order.
1442                  */
1443                 if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
1444                         header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
1445                 }
1446
1447                 // Report anything which needs to be communicated in the notification area (before the main body)
1448                 Core\Hook::callAll('page_end', $this->page['content']);
1449
1450                 // Add the navigation (menu) template
1451                 if ($this->module != 'install' && $this->module != 'maintenance') {
1452                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1453                         $this->page['nav']       = Content\Nav::build($this);
1454                 }
1455
1456                 // Build the page - now that we have all the components
1457                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1458                         $doc = new DOMDocument();
1459
1460                         $target = new DOMDocument();
1461                         $target->loadXML("<root></root>");
1462
1463                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1464
1465                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1466                         @$doc->loadHTML($content);
1467
1468                         $xpath = new DOMXPath($doc);
1469
1470                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1471
1472                         foreach ($list as $item) {
1473                                 $item = $target->importNode($item, true);
1474
1475                                 // And then append it to the target
1476                                 $target->documentElement->appendChild($item);
1477                         }
1478
1479                         if ($_GET["mode"] == "raw") {
1480                                 header("Content-type: text/html; charset=utf-8");
1481
1482                                 echo substr($target->saveHTML(), 6, -8);
1483
1484                                 exit();
1485                         }
1486                 }
1487
1488                 $page    = $this->page;
1489                 $profile = $this->profile;
1490
1491                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1492                 header("Content-type: text/html; charset=utf-8");
1493
1494                 if (Core\Config::get('system', 'hsts') && (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
1495                         header("Strict-Transport-Security: max-age=31536000");
1496                 }
1497
1498                 // Some security stuff
1499                 header('X-Content-Type-Options: nosniff');
1500                 header('X-XSS-Protection: 1; mode=block');
1501                 header('X-Permitted-Cross-Domain-Policies: none');
1502                 header('X-Frame-Options: sameorigin');
1503
1504                 // Things like embedded OSM maps don't work, when this is enabled
1505                 // 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'");
1506
1507                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1508                  * to load another page template than the default one.
1509                  * The page templates are located in /view/php/ or in the theme directory.
1510                  */
1511                 if (isset($_GET["mode"])) {
1512                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1513                 }
1514
1515                 // If there is no page template use the default page template
1516                 if (empty($template)) {
1517                         $template = Core\Theme::getPathForFile("default.php");
1518                 }
1519
1520                 // Theme templates expect $a as an App instance
1521                 $a = $this;
1522
1523                 // Used as is in view/php/default.php
1524                 $lang = Core\L10n::getCurrentLang();
1525
1526                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1527                 require_once $template;
1528         }
1529
1530         /**
1531          * Redirects to another module relative to the current Friendica base.
1532          * If you want to redirect to a external URL, use System::externalRedirectTo()
1533          *
1534          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1535          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1536          *
1537          * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
1538          */
1539         public function internalRedirect($toUrl = '', $ssl = false)
1540         {
1541                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1542                         throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1543                 }
1544
1545                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1546                 Core\System::externalRedirect($redirectTo);
1547         }
1548
1549         /**
1550          * Automatically redirects to relative or absolute URL
1551          * Should only be used if it isn't clear if the URL is either internal or external
1552          *
1553          * @param string $toUrl The target URL
1554          * @throws InternalServerErrorException
1555          */
1556         public function redirect($toUrl)
1557         {
1558                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1559                         Core\System::externalRedirect($toUrl);
1560                 } else {
1561                         $this->internalRedirect($toUrl);
1562                 }
1563         }
1564 }