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\App\Arguments;
  12 use Friendica\Core\Config\Cache\ConfigCache;
  13 use Friendica\Core\Config\Configuration;
  14 use Friendica\Core\Config\PConfiguration;
  15 use Friendica\Core\L10n\L10n;
  16 use Friendica\Core\System;
  17 use Friendica\Core\Theme;
  18 use Friendica\Database\Database;
  19 use Friendica\Model\Profile;
  20 use Friendica\Module\Login;
  21 use Friendica\Module\Special\HTTPException as ModuleHTTPException;
  22 use Friendica\Network\HTTPException;
  23 use Friendica\Util\BaseURL;
  24 use Friendica\Util\ConfigFileLoader;
  25 use Friendica\Util\HTTPSignature;
  26 use Friendica\Util\Profiler;
  27 use Friendica\Util\Strings;
  28 use Psr\Log\LoggerInterface;
  29
  30 /**
  31  *
  32  * class: App
  33  *
  34  * @brief Our main application structure for the life of this page.
  35  *
  36  * Primarily deals with the URL that got us here
  37  * and tries to make some sense of it, and
  38  * stores our page contents and config storage
  39  * and anything else that might need to be passed around
  40  * before we spit the page out.
  41  *
  42  */
  43 class App
  44 {
  45         /** @deprecated 2019.09 - use App\Arguments->getQueryString() */
  46         public $query_string;
  47         public $page;
  48         public $profile;
  49         public $profile_uid;
  50         public $user;
  51         public $cid;
  52         public $contact;
  53         public $contacts;
  54         public $page_contact;
  55         public $content;
  56         public $data         = [];
  57         /** @deprecated 2019.09 - use App\Arguments->getCommand() */
  58         public $cmd = '';
  59         /** @deprecated 2019.09 - use App\Arguments->getArgv() or Arguments->get() */
  60         public $argv;
  61         /** @deprecated 2019.09 - use App\Arguments->getArgc() */
  62         public $argc;
  63         /** @deprecated 2019.09 - Use App\Module->getName() instead */
  64         public $module;
  65         public $timezone;
  66         public $interactive = true;
  67         public $identities;
  68         public $is_mobile   = false;
  69         public $is_tablet   = false;
  70         public $theme_info  = [];
  71         public $category;
  72         // Allow themes to control internal parameters
  73         // by changing App values in theme.php
  74
  75         public $sourcename              = '';
  76         public $videowidth              = 425;
  77         public $videoheight             = 350;
  78         public $force_max_items         = 0;
  79         public $theme_events_in_profile = true;
  80
  81         public $stylesheets   = [];
  82         public $footerScripts = [];
  83
  84         /**
  85          * @var App\Mode The Mode of the Application
  86          */
  87         private $mode;
  88
  89         /**
  90          * @var App\Router
  91          */
  92         private $router;
  93
  94         /**
  95          * @var BaseURL
  96          */
  97         private $baseURL;
  98
  99         /**
 100          * @var string The name of the current theme
 101          */
 102         private $currentTheme;
 103
 104         /**
 105          * @var bool check if request was an AJAX (xmlhttprequest) request
 106          */
 107         private $isAjax;
 108
 109         /**
 110          * @var MobileDetect
 111          */
 112         public $mobileDetect;
 113
 114         /**
 115          * @var Configuration The config
 116          */
 117         private $config;
 118
 119         /**
 120          * @var LoggerInterface The logger
 121          */
 122         private $logger;
 123
 124         /**
 125          * @var Profiler The profiler of this app
 126          */
 127         private $profiler;
 128
 129         /**
 130          * @var Database The Friendica database connection
 131          */
 132         private $database;
 133
 134         /**
 135          * @var L10n The translator
 136          */
 137         private $l10n;
 138
 139         /**
 140          * @var App\Arguments
 141          */
 142         private $args;
 143
 144         /**
 145          * Returns the current config cache of this node
 146          *
 147          * @return ConfigCache
 148          */
 149         public function getConfigCache()
 150         {
 151                 return $this->config->getCache();
 152         }
 153
 154         /**
 155          * Returns the current config of this node
 156          *
 157          * @return Configuration
 158          */
 159         public function getConfig()
 160         {
 161                 return $this->config;
 162         }
 163
 164         /**
 165          * The basepath of this app
 166          *
 167          * @return string
 168          */
 169         public function getBasePath()
 170         {
 171                 // Don't use the basepath of the config table for basepath (it should always be the config-file one)
 172                 return $this->config->getCache()->get('system', 'basepath');
 173         }
 174
 175         /**
 176          * The Logger of this app
 177          *
 178          * @return LoggerInterface
 179          */
 180         public function getLogger()
 181         {
 182                 return $this->logger;
 183         }
 184
 185         /**
 186          * The profiler of this app
 187          *
 188          * @return Profiler
 189          */
 190         public function getProfiler()
 191         {
 192                 return $this->profiler;
 193         }
 194
 195         /**
 196          * Returns the Mode of the Application
 197          *
 198          * @return App\Mode The Application Mode
 199          */
 200         public function getMode()
 201         {
 202                 return $this->mode;
 203         }
 204
 205         /**
 206          * Returns the Database of the Application
 207          *
 208          * @return Database
 209          */
 210         public function getDBA()
 211         {
 212                 return $this->database;
 213         }
 214
 215         /**
 216          * Register a stylesheet file path to be included in the <head> tag of every page.
 217          * Inclusion is done in App->initHead().
 218          * The path can be absolute or relative to the Friendica installation base folder.
 219          *
 220          * @param string $path
 221          *
 222          * @see initHead()
 223          *
 224          */
 225         public function registerStylesheet($path)
 226         {
 227                 if (mb_strpos($path, $this->getBasePath() . DIRECTORY_SEPARATOR) === 0) {
 228                         $path = mb_substr($path, mb_strlen($this->getBasePath() . DIRECTORY_SEPARATOR));
 229                 }
 230
 231                 $this->stylesheets[] = trim($path, '/');
 232         }
 233
 234         /**
 235          * Register a javascript file path to be included in the <footer> tag of every page.
 236          * Inclusion is done in App->initFooter().
 237          * The path can be absolute or relative to the Friendica installation base folder.
 238          *
 239          * @param string $path
 240          *
 241          * @see initFooter()
 242          *
 243          */
 244         public function registerFooterScript($path)
 245         {
 246                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 247
 248                 $this->footerScripts[] = trim($url, '/');
 249         }
 250
 251         public $queue;
 252
 253         /**
 254          * @param Database        $database     The Friendica Database
 255          * @param Configuration   $config       The Configuration
 256          * @param App\Mode        $mode         The mode of this Friendica app
 257          * @param App\Router      $router       The router of this Friendica app
 258          * @param BaseURL         $baseURL      The full base URL of this Friendica app
 259          * @param LoggerInterface $logger       The current app logger
 260          * @param Profiler        $profiler     The profiler of this application
 261          * @param L10n            $l10n         The translator instance
 262          * @param App\Arguments   $args         The Friendica Arguments of the call
 263          * @param MobileDetect    $mobileDetect A mobile detection class
 264          */
 265         public function __construct(Database $database, Configuration $config, App\Mode $mode, App\Router $router, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, L10n $l10n, Arguments $args, MobileDetect $mobileDetect)
 266         {
 267                 $this->database     = $database;
 268                 $this->config       = $config;
 269                 $this->mode         = $mode;
 270                 $this->router       = $router;
 271                 $this->baseURL      = $baseURL;
 272                 $this->profiler     = $profiler;
 273                 $this->logger       = $logger;
 274                 $this->l10n         = $l10n;
 275                 $this->args         = $args;
 276                 $this->mobileDetect = $mobileDetect;
 277
 278                 $this->cmd          = $args->getCommand();
 279                 $this->argv         = $args->getArgv();
 280                 $this->argc         = $args->getArgc();
 281                 $this->query_string = $args->getQueryString();
 282
 283                 $this->is_mobile = $mobileDetect->isMobile();
 284                 $this->is_tablet = $mobileDetect->isTablet();
 285
 286                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 287
 288                 $this->page = [
 289                         'aside'       => '',
 290                         'bottom'      => '',
 291                         'content'     => '',
 292                         'footer'      => '',
 293                         'htmlhead'    => '',
 294                         'nav'         => '',
 295                         'page_title'  => '',
 296                         'right_aside' => '',
 297                         'template'    => '',
 298                         'title'       => ''
 299                 ];
 300
 301                 $this->load();
 302         }
 303
 304         /**
 305          * Load the whole app instance
 306          */
 307         public function load()
 308         {
 309                 set_time_limit(0);
 310
 311                 // This has to be quite large to deal with embedded private photos
 312                 ini_set('pcre.backtrack_limit', 500000);
 313
 314                 set_include_path(
 315                         get_include_path() . PATH_SEPARATOR
 316                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 317                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 318                         . $this->getBasePath());
 319
 320                 $this->profiler->reset();
 321
 322                 if ($this->mode->has(App\Mode::DBAVAILABLE)) {
 323                         $this->profiler->update($this->config);
 324
 325                         Core\Hook::loadHooks();
 326                         $loader = new ConfigFileLoader($this->getBasePath());
 327                         Core\Hook::callAll('load_config', $loader);
 328                 }
 329
 330                 $this->loadDefaultTimezone();
 331                 // Register template engines
 332                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 333         }
 334
 335         /**
 336          * Loads the default timezone
 337          *
 338          * Include support for legacy $default_timezone
 339          *
 340          * @global string $default_timezone
 341          */
 342         private function loadDefaultTimezone()
 343         {
 344                 if ($this->config->get('system', 'default_timezone')) {
 345                         $this->timezone = $this->config->get('system', 'default_timezone');
 346                 } else {
 347                         global $default_timezone;
 348                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 349                 }
 350
 351                 if ($this->timezone) {
 352                         date_default_timezone_set($this->timezone);
 353                 }
 354         }
 355
 356         /**
 357          * Returns the scheme of the current call
 358          *
 359          * @return string
 360          *
 361          * @deprecated 2019.06 - use BaseURL->getScheme() instead
 362          */
 363         public function getScheme()
 364         {
 365                 return $this->baseURL->getScheme();
 366         }
 367
 368         /**
 369          * Retrieves the Friendica instance base URL
 370          *
 371          * @param bool $ssl Whether to append http or https under BaseURL::SSL_POLICY_SELFSIGN
 372          *
 373          * @return string Friendica server base URL
 374          *
 375          * @deprecated 2019.09 - use BaseUrl->get($ssl) instead
 376          */
 377         public function getBaseURL($ssl = false)
 378         {
 379                 return $this->baseURL->get($ssl);
 380         }
 381
 382         /**
 383          * @brief      Initializes the baseurl components
 384          *
 385          * Clears the baseurl cache to prevent inconsistencies
 386          *
 387          * @param string $url
 388          *
 389          * @deprecated 2019.06 - use BaseURL->saveByURL($url) instead
 390          */
 391         public function setBaseURL($url)
 392         {
 393                 $this->baseURL->saveByURL($url);
 394         }
 395
 396         /**
 397          * Returns the current hostname
 398          *
 399          * @return string
 400          *
 401          * @deprecated 2019.06 - use BaseURL->getHostname() instead
 402          */
 403         public function getHostName()
 404         {
 405                 return $this->baseURL->getHostname();
 406         }
 407
 408         /**
 409          * Returns the sub-path of the full URL
 410          *
 411          * @return string
 412          *
 413          * @deprecated 2019.06 - use BaseURL->getUrlPath() instead
 414          */
 415         public function getURLPath()
 416         {
 417                 return $this->baseURL->getUrlPath();
 418         }
 419
 420         /**
 421          * Initializes App->page['htmlhead'].
 422          *
 423          * Includes:
 424          * - Page title
 425          * - Favicons
 426          * - Registered stylesheets (through App->registerStylesheet())
 427          * - Infinite scroll data
 428          * - head.tpl template
 429          */
 430         private function initHead(App\Module $module, PConfiguration $pconfig)
 431         {
 432                 $interval = ((local_user()) ? $pconfig->get(local_user(), 'system', 'update_interval') : 40000);
 433
 434                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 435                 if ($interval < 0) {
 436                         $interval = 2147483647;
 437                 }
 438
 439                 if ($interval < 10000) {
 440                         $interval = 40000;
 441                 }
 442
 443                 // Default title: current module called
 444                 if (empty($this->page['title']) && $module->getName()) {
 445                         $this->page['title'] = ucfirst($module->getName());
 446                 }
 447
 448                 // Prepend the sitename to the page title
 449                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 450
 451                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 452                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 453                 } else {
 454                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 455                 }
 456
 457                 $this->registerStylesheet($stylesheet);
 458
 459                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 460                 if ($shortcut_icon == '') {
 461                         $shortcut_icon = 'images/friendica-32.png';
 462                 }
 463
 464                 $touch_icon = $this->config->get('system', 'touch_icon');
 465                 if ($touch_icon == '') {
 466                         $touch_icon = 'images/friendica-128.png';
 467                 }
 468
 469                 Core\Hook::callAll('head', $this->page['htmlhead']);
 470
 471                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 472                 /* put the head template at the beginning of page['htmlhead']
 473                  * since the code added by the modules frequently depends on it
 474                  * being first
 475                  */
 476                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 477                                 '$local_user'      => local_user(),
 478                                 '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 479                                 '$delitem'         => $this->l10n->t('Delete this item?'),
 480                                 '$update_interval' => $interval,
 481                                 '$shortcut_icon'   => $shortcut_icon,
 482                                 '$touch_icon'      => $touch_icon,
 483                                 '$block_public'    => intval($this->config->get('system', 'block_public')),
 484                                 '$stylesheets'     => $this->stylesheets,
 485                         ]) . $this->page['htmlhead'];
 486         }
 487
 488         /**
 489          * Initializes App->page['footer'].
 490          *
 491          * Includes:
 492          * - Javascript homebase
 493          * - Mobile toggle link
 494          * - Registered footer scripts (through App->registerFooterScript())
 495          * - footer.tpl template
 496          */
 497         private function initFooter()
 498         {
 499                 // If you're just visiting, let javascript take you home
 500                 if (!empty($_SESSION['visitor_home'])) {
 501                         $homebase = $_SESSION['visitor_home'];
 502                 } elseif (local_user()) {
 503                         $homebase = 'profile/' . $this->user['nickname'];
 504                 }
 505
 506                 if (isset($homebase)) {
 507                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 508                 }
 509
 510                 /*
 511                  * Add a "toggle mobile" link if we're using a mobile device
 512                  */
 513                 if ($this->is_mobile || $this->is_tablet) {
 514                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 515                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 516                         } else {
 517                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 518                         }
 519                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 520                                 '$toggle_link' => $link,
 521                                 '$toggle_text' => $this->l10n->t('toggle mobile')
 522                         ]);
 523                 }
 524
 525                 Core\Hook::callAll('footer', $this->page['footer']);
 526
 527                 $tpl                  = Core\Renderer::getMarkupTemplate('footer.tpl');
 528                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 529                                 '$footerScripts' => $this->footerScripts,
 530                         ]) . $this->page['footer'];
 531         }
 532
 533         /**
 534          * @brief Removes the base url from an url. This avoids some mixed content problems.
 535          *
 536          * @param string $origURL
 537          *
 538          * @return string The cleaned url
 539          * @throws HTTPException\InternalServerErrorException
 540          */
 541         public function removeBaseURL($origURL)
 542         {
 543                 // Remove the hostname from the url if it is an internal link
 544                 $nurl = Util\Strings::normaliseLink($origURL);
 545                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 546                 $url  = str_replace($base . '/', '', $nurl);
 547
 548                 // if it is an external link return the orignal value
 549                 if ($url == Util\Strings::normaliseLink($origURL)) {
 550                         return $origURL;
 551                 } else {
 552                         return $url;
 553                 }
 554         }
 555
 556         /**
 557          * Returns the current UserAgent as a String
 558          *
 559          * @return string the UserAgent as a String
 560          * @throws HTTPException\InternalServerErrorException
 561          */
 562         public function getUserAgent()
 563         {
 564                 return
 565                         FRIENDICA_PLATFORM . " '" .
 566                         FRIENDICA_CODENAME . "' " .
 567                         FRIENDICA_VERSION . '-' .
 568                         DB_UPDATE_VERSION . '; ' .
 569                         $this->getBaseURL();
 570         }
 571
 572         /**
 573          * Returns true, if the call is from a backend node (f.e. from a worker)
 574          *
 575          * @return bool Is it a known backend?
 576          *
 577          * @deprecated 2019.09 - use App\Mode->isBackend() instead
 578          * @see App\Mode::isBackend()
 579          * Use BaseObject::getClass(App\Mode::class) to get the global instance of Mode
 580          */
 581         public function isBackend()
 582         {
 583                 return $this->mode->isBackend();
 584         }
 585
 586         /**
 587          * @brief Checks if the maximum number of database processes is reached
 588          *
 589          * @return bool Is the limit reached?
 590          */
 591         public function isMaxProcessesReached()
 592         {
 593                 // Deactivated, needs more investigating if this check really makes sense
 594                 return false;
 595
 596                 /*
 597                  * Commented out to suppress static analyzer issues
 598                  *
 599                 if ($this->is_backend()) {
 600                         $process = 'backend';
 601                         $max_processes = $this->config->get('system', 'max_processes_backend');
 602                         if (intval($max_processes) == 0) {
 603                                 $max_processes = 5;
 604                         }
 605                 } else {
 606                         $process = 'frontend';
 607                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 608                         if (intval($max_processes) == 0) {
 609                                 $max_processes = 20;
 610                         }
 611                 }
 612
 613                 $processlist = DBA::processlist();
 614                 if ($processlist['list'] != '') {
 615                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 616
 617                         if ($processlist['amount'] > $max_processes) {
 618                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 619                                 return true;
 620                         }
 621                 }
 622                 return false;
 623                  */
 624         }
 625
 626         /**
 627          * @brief Checks if the minimal memory is reached
 628          *
 629          * @return bool Is the memory limit reached?
 630          * @throws HTTPException\InternalServerErrorException
 631          */
 632         public function isMinMemoryReached()
 633         {
 634                 $min_memory = $this->config->get('system', 'min_memory', 0);
 635                 if ($min_memory == 0) {
 636                         return false;
 637                 }
 638
 639                 if (!is_readable('/proc/meminfo')) {
 640                         return false;
 641                 }
 642
 643                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 644
 645                 $meminfo = [];
 646                 foreach ($memdata as $line) {
 647                         $data = explode(':', $line);
 648                         if (count($data) != 2) {
 649                                 continue;
 650                         }
 651                         list($key, $val) = $data;
 652                         $meminfo[$key] = (int)trim(str_replace('kB', '', $val));
 653                         $meminfo[$key] = (int)($meminfo[$key] / 1024);
 654                 }
 655
 656                 if (!isset($meminfo['MemFree'])) {
 657                         return false;
 658                 }
 659
 660                 $free = $meminfo['MemFree'];
 661
 662                 $reached = ($free < $min_memory);
 663
 664                 if ($reached) {
 665                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 666                 }
 667
 668                 return $reached;
 669         }
 670
 671         /**
 672          * @brief Checks if the maximum load is reached
 673          *
 674          * @return bool Is the load reached?
 675          * @throws HTTPException\InternalServerErrorException
 676          */
 677         public function isMaxLoadReached()
 678         {
 679                 if ($this->mode->isBackend()) {
 680                         $process    = 'backend';
 681                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 682                         if ($maxsysload < 1) {
 683                                 $maxsysload = 50;
 684                         }
 685                 } else {
 686                         $process    = 'frontend';
 687                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 688                         if ($maxsysload < 1) {
 689                                 $maxsysload = 50;
 690                         }
 691                 }
 692
 693                 $load = Core\System::currentLoad();
 694                 if ($load) {
 695                         if (intval($load) > $maxsysload) {
 696                                 $this->logger->info('system load for process too high.', ['load' => $load, 'process' => $process, 'maxsysload' => $maxsysload]);
 697                                 return true;
 698                         }
 699                 }
 700                 return false;
 701         }
 702
 703         /**
 704          * Executes a child process with 'proc_open'
 705          *
 706          * @param string $command The command to execute
 707          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 708          *
 709          * @throws HTTPException\InternalServerErrorException
 710          */
 711         public function proc_run($command, $args)
 712         {
 713                 if (!function_exists('proc_open')) {
 714                         return;
 715                 }
 716
 717                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 718
 719                 foreach ($args as $key => $value) {
 720                         if (!is_null($value) && is_bool($value) && !$value) {
 721                                 continue;
 722                         }
 723
 724                         $cmdline .= ' --' . $key;
 725                         if (!is_null($value) && !is_bool($value)) {
 726                                 $cmdline .= ' ' . $value;
 727                         }
 728                 }
 729
 730                 if ($this->isMinMemoryReached()) {
 731                         return;
 732                 }
 733
 734                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 735                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 736                 } else {
 737                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 738                 }
 739                 if (!is_resource($resource)) {
 740                         $this->logger->debug('We got no resource for command.', ['cmd' => $cmdline]);
 741                         return;
 742                 }
 743                 proc_close($resource);
 744         }
 745
 746         /**
 747          * Generates the site's default sender email address
 748          *
 749          * @return string
 750          * @throws HTTPException\InternalServerErrorException
 751          */
 752         public function getSenderEmailAddress()
 753         {
 754                 $sender_email = $this->config->get('config', 'sender_email');
 755                 if (empty($sender_email)) {
 756                         $hostname = $this->baseURL->getHostname();
 757                         if (strpos($hostname, ':')) {
 758                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 759                         }
 760
 761                         $sender_email = 'noreply@' . $hostname;
 762                 }
 763
 764                 return $sender_email;
 765         }
 766
 767         /**
 768          * Returns the current theme name.
 769          *
 770          * @return string the name of the current theme
 771          * @throws HTTPException\InternalServerErrorException
 772          */
 773         public function getCurrentTheme()
 774         {
 775                 if ($this->mode->isInstall()) {
 776                         return '';
 777                 }
 778
 779                 if (!$this->currentTheme) {
 780                         $this->computeCurrentTheme();
 781                 }
 782
 783                 return $this->currentTheme;
 784         }
 785
 786         public function setCurrentTheme($theme)
 787         {
 788                 $this->currentTheme = $theme;
 789         }
 790
 791         /**
 792          * Computes the current theme name based on the node settings, the user settings and the device type
 793          *
 794          * @throws Exception
 795          */
 796         private function computeCurrentTheme()
 797         {
 798                 $system_theme = $this->config->get('system', 'theme');
 799                 if (!$system_theme) {
 800                         throw new Exception($this->l10n->t('No system theme config value set.'));
 801                 }
 802
 803                 // Sane default
 804                 $this->currentTheme = $system_theme;
 805
 806                 $page_theme = null;
 807                 // Find the theme that belongs to the user whose stuff we are looking at
 808                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 809                         // Allow folks to override user themes and always use their own on their own site.
 810                         // This works only if the user is on the same server
 811                         $user = $this->database->selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 812                         if ($this->database->isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 813                                 $page_theme = $user['theme'];
 814                         }
 815                 }
 816
 817                 $user_theme = Core\Session::get('theme', $system_theme);
 818
 819                 // Specific mobile theme override
 820                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 821                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 822                         $user_mobile_theme   = Core\Session::get('mobile-theme', $system_mobile_theme);
 823
 824                         // --- means same mobile theme as desktop
 825                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
 826                                 $user_theme = $user_mobile_theme;
 827                         }
 828                 }
 829
 830                 if ($page_theme) {
 831                         $theme_name = $page_theme;
 832                 } else {
 833                         $theme_name = $user_theme;
 834                 }
 835
 836                 $theme_name = Strings::sanitizeFilePathItem($theme_name);
 837                 if ($theme_name
 838                     && in_array($theme_name, Theme::getAllowedList())
 839                     && (file_exists('view/theme/' . $theme_name . '/style.css')
 840                         || file_exists('view/theme/' . $theme_name . '/style.php'))
 841                 ) {
 842                         $this->currentTheme = $theme_name;
 843                 }
 844         }
 845
 846         /**
 847          * @brief Return full URL to theme which is currently in effect.
 848          *
 849          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 850          *
 851          * @return string
 852          * @throws HTTPException\InternalServerErrorException
 853          */
 854         public function getCurrentThemeStylesheetPath()
 855         {
 856                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
 857         }
 858
 859         /**
 860          * Check if request was an AJAX (xmlhttprequest) request.
 861          *
 862          * @return boolean true if it was an AJAX request
 863          */
 864         public function isAjax()
 865         {
 866                 return $this->isAjax;
 867         }
 868
 869         /**
 870          * @deprecated use Arguments->get() instead
 871          *
 872          * @see        App\Arguments
 873          */
 874         public function getArgumentValue($position, $default = '')
 875         {
 876                 return $this->args->get($position, $default);
 877         }
 878
 879         /**
 880          * Sets the base url for use in cmdline programs which don't have
 881          * $_SERVER variables
 882          */
 883         public function checkURL()
 884         {
 885                 $url = $this->config->get('system', 'url');
 886
 887                 // if the url isn't set or the stored url is radically different
 888                 // than the currently visited url, store the current value accordingly.
 889                 // "Radically different" ignores common variations such as http vs https
 890                 // and www.example.com vs example.com.
 891                 // We will only change the url to an ip address if there is no existing setting
 892
 893                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->baseURL->getHostname()))) {
 894                         $this->config->set('system', 'url', $this->getBaseURL());
 895                 }
 896         }
 897
 898         /**
 899          * Frontend App script
 900          *
 901          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
 902          * request and a representation of the response.
 903          *
 904          * This probably should change to limit the size of this monster method.
 905          *
 906          * @param App\Module $module The determined module
 907          */
 908         public function runFrontend(App\Module $module, App\Router $router, PConfiguration $pconfig)
 909         {
 910                 $moduleName = $module->getName();
 911
 912                 try {
 913                         // Missing DB connection: ERROR
 914                         if ($this->mode->has(App\Mode::LOCALCONFIGPRESENT) && !$this->mode->has(App\Mode::DBAVAILABLE)) {
 915                                 throw new HTTPException\InternalServerErrorException('Apologies but the website is unavailable at the moment.');
 916                         }
 917
 918                         // Max Load Average reached: ERROR
 919                         if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
 920                                 header('Retry-After: 120');
 921                                 header('Refresh: 120; url=' . $this->baseURL->get() . "/" . $this->args->getQueryString());
 922
 923                                 throw new HTTPException\ServiceUnavailableException('The node is currently overloaded. Please try again later.');
 924                         }
 925
 926                         if (!$this->mode->isInstall()) {
 927                                 // Force SSL redirection
 928                                 if ($this->baseURL->checkRedirectHttps()) {
 929                                         System::externalRedirect($this->baseURL->get() . '/' . $this->args->getQueryString());
 930                                 }
 931
 932                                 Core\Session::init();
 933                                 Core\Hook::callAll('init_1');
 934                         }
 935
 936                         // Exclude the backend processes from the session management
 937                         if (!$this->mode->isBackend()) {
 938                                 $stamp1 = microtime(true);
 939                                 session_start();
 940                                 $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
 941                                 $this->l10n->setSessionVariable();
 942                                 $this->l10n->setLangFromSession();
 943                         } else {
 944                                 $_SESSION = [];
 945                                 Core\Worker::executeIfIdle();
 946                         }
 947
 948                         if ($this->mode->isNormal()) {
 949                                 $requester = HTTPSignature::getSigner('', $_SERVER);
 950                                 if (!empty($requester)) {
 951                                         Profile::addVisitorCookieForHandle($requester);
 952                                 }
 953                         }
 954
 955                         // ZRL
 956                         if (!empty($_GET['zrl']) && $this->mode->isNormal()) {
 957                                 if (!local_user()) {
 958                                         // Only continue when the given profile link seems valid
 959                                         // Valid profile links contain a path with "/profile/" and no query parameters
 960                                         if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
 961                                             strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
 962                                                 if (Core\Session::get('visitor_home') != $_GET["zrl"]) {
 963                                                         Core\Session::set('my_url', $_GET['zrl']);
 964                                                         Core\Session::set('authenticated', 0);
 965                                                 }
 966
 967                                                 Model\Profile::zrlInit($this);
 968                                         } else {
 969                                                 // Someone came with an invalid parameter, maybe as a DDoS attempt
 970                                                 // We simply stop processing here
 971                                                 $this->logger->debug('Invalid ZRL parameter.', ['zrl' => $_GET['zrl']]);
 972                                                 throw new HTTPException\ForbiddenException();
 973                                         }
 974                                 }
 975                         }
 976
 977                         if (!empty($_GET['owt']) && $this->mode->isNormal()) {
 978                                 $token = $_GET['owt'];
 979                                 Model\Profile::openWebAuthInit($token);
 980                         }
 981
 982                         Login::sessionAuth();
 983
 984                         if (empty($_SESSION['authenticated'])) {
 985                                 header('X-Account-Management-Status: none');
 986                         }
 987
 988                         $_SESSION['sysmsg']       = Core\Session::get('sysmsg', []);
 989                         $_SESSION['sysmsg_info']  = Core\Session::get('sysmsg_info', []);
 990                         $_SESSION['last_updated'] = Core\Session::get('last_updated', []);
 991
 992                         /*
 993                          * check_config() is responsible for running update scripts. These automatically
 994                          * update the DB schema whenever we push a new one out. It also checks to see if
 995                          * any addons have been added or removed and reacts accordingly.
 996                          */
 997
 998                         // in install mode, any url loads install module
 999                         // but we need "view" module for stylesheet
1000                         if ($this->mode->isInstall() && $moduleName !== 'install') {
1001                                 $this->internalRedirect('install');
1002                         } elseif (!$this->mode->isInstall() && !$this->mode->has(App\Mode::MAINTENANCEDISABLED) && $moduleName !== 'maintenance') {
1003                                 $this->internalRedirect('maintenance');
1004                         } else {
1005                                 $this->checkURL();
1006                                 Core\Update::check($this->getBasePath(), false, $this->mode);
1007                                 Core\Addon::loadAddons();
1008                                 Core\Hook::loadHooks();
1009                         }
1010
1011                         // Compatibility with the Android Diaspora client
1012                         if ($moduleName == 'stream') {
1013                                 $this->internalRedirect('network?order=post');
1014                         }
1015
1016                         if ($moduleName == 'conversations') {
1017                                 $this->internalRedirect('message');
1018                         }
1019
1020                         if ($moduleName == 'commented') {
1021                                 $this->internalRedirect('network?order=comment');
1022                         }
1023
1024                         if ($moduleName == 'liked') {
1025                                 $this->internalRedirect('network?order=comment');
1026                         }
1027
1028                         if ($moduleName == 'activity') {
1029                                 $this->internalRedirect('network?conv=1');
1030                         }
1031
1032                         if (($moduleName == 'status_messages') && ($this->args->getCommand() == 'status_messages/new')) {
1033                                 $this->internalRedirect('bookmarklet');
1034                         }
1035
1036                         if (($moduleName == 'user') && ($this->args->getCommand() == 'user/edit')) {
1037                                 $this->internalRedirect('settings');
1038                         }
1039
1040                         if (($moduleName == 'tag_followings') && ($this->args->getCommand() == 'tag_followings/manage')) {
1041                                 $this->internalRedirect('search');
1042                         }
1043
1044                         // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1045                         $this->page['page_title'] = $moduleName;
1046
1047                         // determine the module class and save it to the module instance
1048                         // @todo there's an implicit dependency due SESSION::start(), so it has to be called here (yet)
1049                         $module = $module->determineClass($this->args, $router, $this->config);
1050
1051                         // Let the module run it's internal process (init, get, post, ...)
1052                         $module->run($this->l10n, $this, $this->logger, $this->getCurrentTheme(), $_SERVER, $_POST);
1053
1054                 } catch (HTTPException $e) {
1055                         ModuleHTTPException::rawContent($e);
1056                 }
1057
1058                 $content = '';
1059
1060                 try {
1061                         $moduleClass = $module->getClassName();
1062
1063                         $arr = ['content' => $content];
1064                         Core\Hook::callAll($moduleClass . '_mod_content', $arr);
1065                         $content = $arr['content'];
1066                         $arr     = ['content' => call_user_func([$moduleClass, 'content'])];
1067                         Core\Hook::callAll($moduleClass . '_mod_aftercontent', $arr);
1068                         $content .= $arr['content'];
1069                 } catch (HTTPException $e) {
1070                         $content = ModuleHTTPException::content($e);
1071                 }
1072
1073                 // initialise content region
1074                 if ($this->mode->isNormal()) {
1075                         Core\Hook::callAll('page_content_top', $this->page['content']);
1076                 }
1077
1078                 $this->page['content'] .= $content;
1079
1080                 /* Create the page head after setting the language
1081                  * and getting any auth credentials.
1082                  *
1083                  * Moved initHead() and initFooter() to after
1084                  * all the module functions have executed so that all
1085                  * theme choices made by the modules can take effect.
1086                  */
1087                 $this->initHead($module, $pconfig);
1088
1089                 /* Build the page ending -- this is stuff that goes right before
1090                  * the closing </body> tag
1091                  */
1092                 $this->initFooter();
1093
1094                 if (!$this->isAjax()) {
1095                         Core\Hook::callAll('page_end', $this->page['content']);
1096                 }
1097
1098                 // Add the navigation (menu) template
1099                 if ($moduleName != 'install' && $moduleName != 'maintenance') {
1100                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1101                         $this->page['nav']      = Content\Nav::build($this);
1102                 }
1103
1104                 // Build the page - now that we have all the components
1105                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1106                         $doc = new DOMDocument();
1107
1108                         $target = new DOMDocument();
1109                         $target->loadXML("<root></root>");
1110
1111                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1112
1113                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1114                         @$doc->loadHTML($content);
1115
1116                         $xpath = new DOMXPath($doc);
1117
1118                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1119
1120                         foreach ($list as $item) {
1121                                 $item = $target->importNode($item, true);
1122
1123                                 // And then append it to the target
1124                                 $target->documentElement->appendChild($item);
1125                         }
1126
1127                         if ($_GET["mode"] == "raw") {
1128                                 header("Content-type: text/html; charset=utf-8");
1129
1130                                 echo substr($target->saveHTML(), 6, -8);
1131
1132                                 exit();
1133                         }
1134                 }
1135
1136                 $page    = $this->page;
1137                 $profile = $this->profile;
1138
1139                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1140                 header("Content-type: text/html; charset=utf-8");
1141
1142                 if ($this->config->get('system', 'hsts') && ($this->baseURL->getSSLPolicy() == BaseUrl::SSL_POLICY_FULL)) {
1143                         header("Strict-Transport-Security: max-age=31536000");
1144                 }
1145
1146                 // Some security stuff
1147                 header('X-Content-Type-Options: nosniff');
1148                 header('X-XSS-Protection: 1; mode=block');
1149                 header('X-Permitted-Cross-Domain-Policies: none');
1150                 header('X-Frame-Options: sameorigin');
1151
1152                 // Things like embedded OSM maps don't work, when this is enabled
1153                 // 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'");
1154
1155                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1156                  * to load another page template than the default one.
1157                  * The page templates are located in /view/php/ or in the theme directory.
1158                  */
1159                 if (isset($_GET["mode"])) {
1160                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1161                 }
1162
1163                 // If there is no page template use the default page template
1164                 if (empty($template)) {
1165                         $template = Core\Theme::getPathForFile("default.php");
1166                 }
1167
1168                 // Theme templates expect $a as an App instance
1169                 $a = $this;
1170
1171                 // Used as is in view/php/default.php
1172                 $lang = $this->l10n->getCurrentLang();
1173
1174                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1175                 require_once $template;
1176         }
1177
1178         /**
1179          * Redirects to another module relative to the current Friendica base.
1180          * If you want to redirect to a external URL, use System::externalRedirectTo()
1181          *
1182          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1183          * @param bool   $ssl   if true, base URL will try to get called with https:// (works just for relative paths)
1184          *
1185          * @throws HTTPException\InternalServerErrorException In Case the given URL is not relative to the Friendica node
1186          */
1187         public function internalRedirect($toUrl = '', $ssl = false)
1188         {
1189                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1190                         throw new HTTPException\InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1191                 }
1192
1193                 $redirectTo = $this->baseURL->get($ssl) . '/' . ltrim($toUrl, '/');
1194                 Core\System::externalRedirect($redirectTo);
1195         }
1196
1197         /**
1198          * Automatically redirects to relative or absolute URL
1199          * Should only be used if it isn't clear if the URL is either internal or external
1200          *
1201          * @param string $toUrl The target URL
1202          *
1203          * @throws HTTPException\InternalServerErrorException
1204          */
1205         public function redirect($toUrl)
1206         {
1207                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1208                         Core\System::externalRedirect($toUrl);
1209                 } else {
1210                         $this->internalRedirect($toUrl);
1211                 }
1212         }
1213 }