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\App\Module;
  13 use Friendica\Core\Config\Cache\ConfigCache;
  14 use Friendica\Core\Config\Configuration;
  15 use Friendica\Core\Config\PConfiguration;
  16 use Friendica\Core\L10n\L10n;
  17 use Friendica\Core\System;
  18 use Friendica\Core\Theme;
  19 use Friendica\Database\Database;
  20 use Friendica\Database\DBA;
  21 use Friendica\Model\Profile;
  22 use Friendica\Module\Login;
  23 use Friendica\Module\Special\HTTPException as ModuleHTTPException;
  24 use Friendica\Network\HTTPException;
  25 use Friendica\Util\BaseURL;
  26 use Friendica\Util\ConfigFileLoader;
  27 use Friendica\Util\HTTPSignature;
  28 use Friendica\Util\Profiler;
  29 use Friendica\Util\Strings;
  30 use Psr\Log\LoggerInterface;
  31
  32 /**
  33  *
  34  * class: App
  35  *
  36  * @brief Our main application structure for the life of this page.
  37  *
  38  * Primarily deals with the URL that got us here
  39  * and tries to make some sense of it, and
  40  * stores our page contents and config storage
  41  * and anything else that might need to be passed around
  42  * before we spit the page out.
  43  *
  44  */
  45 class App
  46 {
  47         /** @deprecated 2019.09 - use App\Arguments->getQueryString() */
  48         public $query_string = '';
  49         public $page = [];
  50         public $profile;
  51         public $profile_uid;
  52         public $user;
  53         public $cid;
  54         public $contact;
  55         public $contacts;
  56         public $page_contact;
  57         public $content;
  58         public $data = [];
  59         /** @deprecated 2019.09 - use App\Arguments->getCommand() */
  60         public $cmd = '';
  61         /** @deprecated 2019.09 - use App\Arguments->getArgv() or Arguments->get() */
  62         public $argv;
  63         /** @deprecated 2019.09 - use App\Arguments->getArgc() */
  64         public $argc;
  65         /** @deprecated 2019.09 - Use App\Module->getName() instead */
  66         public $module;
  67         public $timezone;
  68         public $interactive = true;
  69         public $identities;
  70         public $is_mobile = false;
  71         public $is_tablet = false;
  72         public $theme_info = [];
  73         public $category;
  74         // Allow themes to control internal parameters
  75         // by changing App values in theme.php
  76
  77         public $sourcename = '';
  78         public $videowidth = 425;
  79         public $videoheight = 350;
  80         public $force_max_items = 0;
  81         public $theme_events_in_profile = true;
  82
  83         public $stylesheets = [];
  84         public $footerScripts = [];
  85
  86         /**
  87          * @var App\Mode The Mode of the Application
  88          */
  89         private $mode;
  90
  91         /**
  92          * @var App\Router
  93          */
  94         private $router;
  95
  96         /**
  97          * @var BaseURL
  98          */
  99         private $baseURL;
 100
 101         /**
 102          * @var bool true, if the call is from an backend node (f.e. worker)
 103          */
 104         private $isBackend;
 105
 106         /**
 107          * @var string The name of the current theme
 108          */
 109         private $currentTheme;
 110
 111         /**
 112          * @var bool check if request was an AJAX (xmlhttprequest) request
 113          */
 114         private $isAjax;
 115
 116         /**
 117          * @var MobileDetect
 118          */
 119         public $mobileDetect;
 120
 121         /**
 122          * @var Configuration The config
 123          */
 124         private $config;
 125
 126         /**
 127          * @var LoggerInterface The logger
 128          */
 129         private $logger;
 130
 131         /**
 132          * @var Profiler The profiler of this app
 133          */
 134         private $profiler;
 135
 136         /**
 137          * @var Database The Friendica database connection
 138          */
 139         private $database;
 140
 141         /**
 142          * @var L10n The translator
 143          */
 144         private $l10n;
 145
 146         /**
 147          * @var App\Arguments
 148          */
 149         private $args;
 150
 151         /**
 152          * @var App\Module
 153          */
 154         private $moduleClass;
 155
 156         /**
 157          * Returns the current config cache of this node
 158          *
 159          * @return ConfigCache
 160          */
 161         public function getConfigCache()
 162         {
 163                 return $this->config->getCache();
 164         }
 165
 166         /**
 167          * Returns the current config of this node
 168          *
 169          * @return Configuration
 170          */
 171         public function getConfig()
 172         {
 173                 return $this->config;
 174         }
 175
 176         /**
 177          * The basepath of this app
 178          *
 179          * @return string
 180          */
 181         public function getBasePath()
 182         {
 183                 // Don't use the basepath of the config table for basepath (it should always be the config-file one)
 184                 return $this->config->getCache()->get('system', 'basepath');
 185         }
 186
 187         /**
 188          * The Logger of this app
 189          *
 190          * @return LoggerInterface
 191          */
 192         public function getLogger()
 193         {
 194                 return $this->logger;
 195         }
 196
 197         /**
 198          * The profiler of this app
 199          *
 200          * @return Profiler
 201          */
 202         public function getProfiler()
 203         {
 204                 return $this->profiler;
 205         }
 206
 207         /**
 208          * Returns the Mode of the Application
 209          *
 210          * @return App\Mode The Application Mode
 211          */
 212         public function getMode()
 213         {
 214                 return $this->mode;
 215         }
 216
 217         /**
 218          * Returns the Database of the Application
 219          *
 220          * @return Database
 221          */
 222         public function getDBA()
 223         {
 224                 return $this->database;
 225         }
 226
 227         /**
 228          * Register a stylesheet file path to be included in the <head> tag of every page.
 229          * Inclusion is done in App->initHead().
 230          * The path can be absolute or relative to the Friendica installation base folder.
 231          *
 232          * @see initHead()
 233          *
 234          * @param string $path
 235          */
 236         public function registerStylesheet($path)
 237         {
 238                 if (mb_strpos($path, $this->getBasePath() . DIRECTORY_SEPARATOR) === 0) {
 239                         $path = mb_substr($path, mb_strlen($this->getBasePath() . DIRECTORY_SEPARATOR));
 240                 }
 241
 242                 $this->stylesheets[] = trim($path, '/');
 243         }
 244
 245         /**
 246          * Register a javascript file path to be included in the <footer> tag of every page.
 247          * Inclusion is done in App->initFooter().
 248          * The path can be absolute or relative to the Friendica installation base folder.
 249          *
 250          * @see initFooter()
 251          *
 252          * @param string $path
 253          */
 254         public function registerFooterScript($path)
 255         {
 256                 $url = str_replace($this->getBasePath() . DIRECTORY_SEPARATOR, '', $path);
 257
 258                 $this->footerScripts[] = trim($url, '/');
 259         }
 260
 261         public $queue;
 262
 263         /**
 264          * @brief App constructor.
 265          *
 266          * @param Database $database The Friendica Database
 267          * @param Configuration    $config    The Configuration
 268          * @param App\Mode         $mode      The mode of this Friendica app
 269          * @param App\Router       $router    The router of this Friendica app
 270          * @param BaseURL          $baseURL   The full base URL of this Friendica app
 271          * @param LoggerInterface  $logger    The current app logger
 272          * @param Profiler         $profiler  The profiler of this application
 273          * @param L10n             $l10n      The translator instance
 274          *
 275          * @throws Exception if the Basepath is not usable
 276          */
 277         public function __construct(Database $database, Configuration $config, App\Mode $mode, App\Router $router, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, L10n $l10n, Arguments $args, Module $module)
 278         {
 279                 $this->database = $database;
 280                 $this->config   = $config;
 281                 $this->mode     = $mode;
 282                 $this->router   = $router;
 283                 $this->baseURL  = $baseURL;
 284                 $this->profiler = $profiler;
 285                 $this->logger   = $logger;
 286                 $this->l10n     = $l10n;
 287                 $this->args = $args;
 288                 $this->isBackend = $this->checkBackend($module);
 289
 290                 $this->profiler->reset();
 291
 292                 $this->reload();
 293
 294                 set_time_limit(0);
 295
 296                 // This has to be quite large to deal with embedded private photos
 297                 ini_set('pcre.backtrack_limit', 500000);
 298
 299                 set_include_path(
 300                         get_include_path() . PATH_SEPARATOR
 301                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
 302                         . $this->getBasePath() . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
 303                         . $this->getBasePath());
 304
 305                 $this->cmd = $args->getCommand();
 306                 $this->argv = $args->getArgv();
 307                 $this->argc = $args->getArgc();
 308                 $this->query_string = $args->getQueryString();
 309
 310                 // Detect mobile devices
 311                 $mobile_detect = new MobileDetect();
 312
 313                 $this->mobileDetect = $mobile_detect;
 314
 315                 $this->is_mobile = $mobile_detect->isMobile();
 316                 $this->is_tablet = $mobile_detect->isTablet();
 317
 318                 $this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
 319
 320                 // Register template engines
 321                 Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
 322         }
 323
 324         /**
 325          * Reloads the whole app instance
 326          */
 327         public function reload()
 328         {
 329                 if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
 330                         $this->profiler->update($this->config);
 331
 332                         Core\Hook::loadHooks();
 333                         $loader = new ConfigFileLoader($this->getBasePath());
 334                         Core\Hook::callAll('load_config', $loader);
 335                 }
 336
 337                 $this->loadDefaultTimezone();
 338         }
 339
 340         /**
 341          * Loads the default timezone
 342          *
 343          * Include support for legacy $default_timezone
 344          *
 345          * @global string $default_timezone
 346          */
 347         private function loadDefaultTimezone()
 348         {
 349                 if ($this->config->get('system', 'default_timezone')) {
 350                         $this->timezone = $this->config->get('system', 'default_timezone');
 351                 } else {
 352                         global $default_timezone;
 353                         $this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
 354                 }
 355
 356                 if ($this->timezone) {
 357                         date_default_timezone_set($this->timezone);
 358                 }
 359         }
 360
 361         /**
 362          * Returns the scheme of the current call
 363          * @return string
 364          *
 365          * @deprecated 2019.06 - use BaseURL->getScheme() instead
 366          */
 367         public function getScheme()
 368         {
 369                 return $this->baseURL->getScheme();
 370         }
 371
 372         /**
 373          * Retrieves the Friendica instance base URL
 374          *
 375          * @param bool $ssl Whether to append http or https under BaseURL::SSL_POLICY_SELFSIGN
 376          *
 377          * @return string Friendica server base URL
 378          *
 379          * @deprecated 2019.09 - use BaseUrl->get($ssl) instead
 380          */
 381         public function getBaseURL($ssl = false)
 382         {
 383                 return $this->baseURL->get($ssl);
 384         }
 385
 386         /**
 387          * @brief Initializes the baseurl components
 388          *
 389          * Clears the baseurl cache to prevent inconsistencies
 390          *
 391          * @param string $url
 392          *
 393          * @deprecated 2019.06 - use BaseURL->saveByURL($url) instead
 394          */
 395         public function setBaseURL($url)
 396         {
 397                 $this->baseURL->saveByURL($url);
 398         }
 399
 400         /**
 401          * Returns the current hostname
 402          *
 403          * @return string
 404          *
 405          * @deprecated 2019.06 - use BaseURL->getHostname() instead
 406          */
 407         public function getHostName()
 408         {
 409                 return $this->baseURL->getHostname();
 410         }
 411
 412         /**
 413          * Returns the sub-path of the full URL
 414          *
 415          * @return string
 416          *
 417          * @deprecated 2019.06 - use BaseURL->getUrlPath() instead
 418          */
 419         public function getURLPath()
 420         {
 421                 return $this->baseURL->getUrlPath();
 422         }
 423
 424         /**
 425          * Initializes App->page['htmlhead'].
 426          *
 427          * Includes:
 428          * - Page title
 429          * - Favicons
 430          * - Registered stylesheets (through App->registerStylesheet())
 431          * - Infinite scroll data
 432          * - head.tpl template
 433          */
 434         private function initHead(App\Module $module, PConfiguration $pconfig)
 435         {
 436                 $interval = ((local_user()) ? $pconfig->get(local_user(), 'system', 'update_interval') : 40000);
 437
 438                 // If the update is 'deactivated' set it to the highest integer number (~24 days)
 439                 if ($interval < 0) {
 440                         $interval = 2147483647;
 441                 }
 442
 443                 if ($interval < 10000) {
 444                         $interval = 40000;
 445                 }
 446
 447                 // Default title: current module called
 448                 if (empty($this->page['title']) && $module->getName()) {
 449                         $this->page['title'] = ucfirst($module->getName());
 450                 }
 451
 452                 // Prepend the sitename to the page title
 453                 $this->page['title'] = $this->config->get('config', 'sitename', '') . (!empty($this->page['title']) ? ' | ' . $this->page['title'] : '');
 454
 455                 if (!empty(Core\Renderer::$theme['stylesheet'])) {
 456                         $stylesheet = Core\Renderer::$theme['stylesheet'];
 457                 } else {
 458                         $stylesheet = $this->getCurrentThemeStylesheetPath();
 459                 }
 460
 461                 $this->registerStylesheet($stylesheet);
 462
 463                 $shortcut_icon = $this->config->get('system', 'shortcut_icon');
 464                 if ($shortcut_icon == '') {
 465                         $shortcut_icon = 'images/friendica-32.png';
 466                 }
 467
 468                 $touch_icon = $this->config->get('system', 'touch_icon');
 469                 if ($touch_icon == '') {
 470                         $touch_icon = 'images/friendica-128.png';
 471                 }
 472
 473                 Core\Hook::callAll('head', $this->page['htmlhead']);
 474
 475                 $tpl = Core\Renderer::getMarkupTemplate('head.tpl');
 476                 /* put the head template at the beginning of page['htmlhead']
 477                  * since the code added by the modules frequently depends on it
 478                  * being first
 479                  */
 480                 $this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
 481                         '$local_user'      => local_user(),
 482                         '$generator'       => 'Friendica' . ' ' . FRIENDICA_VERSION,
 483                         '$delitem'         => $this->l10n->t('Delete this item?'),
 484                         '$update_interval' => $interval,
 485                         '$shortcut_icon'   => $shortcut_icon,
 486                         '$touch_icon'      => $touch_icon,
 487                         '$block_public'    => intval($this->config->get('system', 'block_public')),
 488                         '$stylesheets'     => $this->stylesheets,
 489                 ]) . $this->page['htmlhead'];
 490         }
 491
 492         /**
 493          * Initializes App->page['footer'].
 494          *
 495          * Includes:
 496          * - Javascript homebase
 497          * - Mobile toggle link
 498          * - Registered footer scripts (through App->registerFooterScript())
 499          * - footer.tpl template
 500          */
 501         private function initFooter()
 502         {
 503                 // If you're just visiting, let javascript take you home
 504                 if (!empty($_SESSION['visitor_home'])) {
 505                         $homebase = $_SESSION['visitor_home'];
 506                 } elseif (local_user()) {
 507                         $homebase = 'profile/' . $this->user['nickname'];
 508                 }
 509
 510                 if (isset($homebase)) {
 511                         $this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
 512                 }
 513
 514                 /*
 515                  * Add a "toggle mobile" link if we're using a mobile device
 516                  */
 517                 if ($this->is_mobile || $this->is_tablet) {
 518                         if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 519                                 $link = 'toggle_mobile?address=' . urlencode(curPageURL());
 520                         } else {
 521                                 $link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
 522                         }
 523                         $this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
 524                                 '$toggle_link' => $link,
 525                                 '$toggle_text' => $this->l10n->t('toggle mobile')
 526                         ]);
 527                 }
 528
 529                 Core\Hook::callAll('footer', $this->page['footer']);
 530
 531                 $tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
 532                 $this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
 533                         '$footerScripts' => $this->footerScripts,
 534                 ]) . $this->page['footer'];
 535         }
 536
 537         /**
 538          * @brief Removes the base url from an url. This avoids some mixed content problems.
 539          *
 540          * @param string $origURL
 541          *
 542          * @return string The cleaned url
 543          * @throws HTTPException\InternalServerErrorException
 544          */
 545         public function removeBaseURL($origURL)
 546         {
 547                 // Remove the hostname from the url if it is an internal link
 548                 $nurl = Util\Strings::normaliseLink($origURL);
 549                 $base = Util\Strings::normaliseLink($this->getBaseURL());
 550                 $url = str_replace($base . '/', '', $nurl);
 551
 552                 // if it is an external link return the orignal value
 553                 if ($url == Util\Strings::normaliseLink($origURL)) {
 554                         return $origURL;
 555                 } else {
 556                         return $url;
 557                 }
 558         }
 559
 560         /**
 561          * Returns the current UserAgent as a String
 562          *
 563          * @return string the UserAgent as a String
 564          * @throws HTTPException\InternalServerErrorException
 565          */
 566         public function getUserAgent()
 567         {
 568                 return
 569                         FRIENDICA_PLATFORM . " '" .
 570                         FRIENDICA_CODENAME . "' " .
 571                         FRIENDICA_VERSION . '-' .
 572                         DB_UPDATE_VERSION . '; ' .
 573                         $this->getBaseURL();
 574         }
 575
 576         /**
 577          * Checks if the site is called via a backend process
 578          *
 579          * @param Module $module The pre-loaded module (just name, not class!)
 580
 581          * @return bool True, if the call is a backend call
 582          */
 583         private function checkBackend(Module $module)
 584         {
 585                 return basename(($_SERVER['PHP_SELF'] ?? ''), '.php') !== 'index' ||
 586                        $module->isBackend();
 587         }
 588
 589         /**
 590          * Returns true, if the call is from a backend node (f.e. from a worker)
 591          *
 592          * @return bool Is it a known backend?
 593          */
 594         public function isBackend()
 595         {
 596                 return $this->isBackend;
 597         }
 598
 599         /**
 600          * @brief Checks if the maximum number of database processes is reached
 601          *
 602          * @return bool Is the limit reached?
 603          */
 604         public function isMaxProcessesReached()
 605         {
 606                 // Deactivated, needs more investigating if this check really makes sense
 607                 return false;
 608
 609                 /*
 610                  * Commented out to suppress static analyzer issues
 611                  *
 612                 if ($this->is_backend()) {
 613                         $process = 'backend';
 614                         $max_processes = $this->config->get('system', 'max_processes_backend');
 615                         if (intval($max_processes) == 0) {
 616                                 $max_processes = 5;
 617                         }
 618                 } else {
 619                         $process = 'frontend';
 620                         $max_processes = $this->config->get('system', 'max_processes_frontend');
 621                         if (intval($max_processes) == 0) {
 622                                 $max_processes = 20;
 623                         }
 624                 }
 625
 626                 $processlist = DBA::processlist();
 627                 if ($processlist['list'] != '') {
 628                         Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
 629
 630                         if ($processlist['amount'] > $max_processes) {
 631                                 Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
 632                                 return true;
 633                         }
 634                 }
 635                 return false;
 636                  */
 637         }
 638
 639         /**
 640          * @brief Checks if the minimal memory is reached
 641          *
 642          * @return bool Is the memory limit reached?
 643          * @throws HTTPException\InternalServerErrorException
 644          */
 645         public function isMinMemoryReached()
 646         {
 647                 $min_memory = $this->config->get('system', 'min_memory', 0);
 648                 if ($min_memory == 0) {
 649                         return false;
 650                 }
 651
 652                 if (!is_readable('/proc/meminfo')) {
 653                         return false;
 654                 }
 655
 656                 $memdata = explode("\n", file_get_contents('/proc/meminfo'));
 657
 658                 $meminfo = [];
 659                 foreach ($memdata as $line) {
 660                         $data = explode(':', $line);
 661                         if (count($data) != 2) {
 662                                 continue;
 663                         }
 664                         list($key, $val) = $data;
 665                         $meminfo[$key] = (int) trim(str_replace('kB', '', $val));
 666                         $meminfo[$key] = (int) ($meminfo[$key] / 1024);
 667                 }
 668
 669                 if (!isset($meminfo['MemFree'])) {
 670                         return false;
 671                 }
 672
 673                 $free = $meminfo['MemFree'];
 674
 675                 $reached = ($free < $min_memory);
 676
 677                 if ($reached) {
 678                         Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
 679                 }
 680
 681                 return $reached;
 682         }
 683
 684         /**
 685          * @brief Checks if the maximum load is reached
 686          *
 687          * @return bool Is the load reached?
 688          * @throws HTTPException\InternalServerErrorException
 689          */
 690         public function isMaxLoadReached()
 691         {
 692                 if ($this->isBackend()) {
 693                         $process = 'backend';
 694                         $maxsysload = intval($this->config->get('system', 'maxloadavg'));
 695                         if ($maxsysload < 1) {
 696                                 $maxsysload = 50;
 697                         }
 698                 } else {
 699                         $process = 'frontend';
 700                         $maxsysload = intval($this->config->get('system', 'maxloadavg_frontend'));
 701                         if ($maxsysload < 1) {
 702                                 $maxsysload = 50;
 703                         }
 704                 }
 705
 706                 $load = Core\System::currentLoad();
 707                 if ($load) {
 708                         if (intval($load) > $maxsysload) {
 709                                 Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
 710                                 return true;
 711                         }
 712                 }
 713                 return false;
 714         }
 715
 716         /**
 717          * Executes a child process with 'proc_open'
 718          *
 719          * @param string $command The command to execute
 720          * @param array  $args    Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
 721          * @throws HTTPException\InternalServerErrorException
 722          */
 723         public function proc_run($command, $args)
 724         {
 725                 if (!function_exists('proc_open')) {
 726                         return;
 727                 }
 728
 729                 $cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
 730
 731                 foreach ($args as $key => $value) {
 732                         if (!is_null($value) && is_bool($value) && !$value) {
 733                                 continue;
 734                         }
 735
 736                         $cmdline .= ' --' . $key;
 737                         if (!is_null($value) && !is_bool($value)) {
 738                                 $cmdline .= ' ' . $value;
 739                         }
 740                 }
 741
 742                 if ($this->isMinMemoryReached()) {
 743                         return;
 744                 }
 745
 746                 if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 747                         $resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->getBasePath());
 748                 } else {
 749                         $resource = proc_open($cmdline . ' &', [], $foo, $this->getBasePath());
 750                 }
 751                 if (!is_resource($resource)) {
 752                         Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
 753                         return;
 754                 }
 755                 proc_close($resource);
 756         }
 757
 758         /**
 759          * Generates the site's default sender email address
 760          *
 761          * @return string
 762          * @throws HTTPException\InternalServerErrorException
 763          */
 764         public function getSenderEmailAddress()
 765         {
 766                 $sender_email = $this->config->get('config', 'sender_email');
 767                 if (empty($sender_email)) {
 768                         $hostname = $this->baseURL->getHostname();
 769                         if (strpos($hostname, ':')) {
 770                                 $hostname = substr($hostname, 0, strpos($hostname, ':'));
 771                         }
 772
 773                         $sender_email = 'noreply@' . $hostname;
 774                 }
 775
 776                 return $sender_email;
 777         }
 778
 779         /**
 780          * Returns the current theme name.
 781          *
 782          * @return string the name of the current theme
 783          * @throws HTTPException\InternalServerErrorException
 784          */
 785         public function getCurrentTheme()
 786         {
 787                 if ($this->getMode()->isInstall()) {
 788                         return '';
 789                 }
 790
 791                 if (!$this->currentTheme) {
 792                         $this->computeCurrentTheme();
 793                 }
 794
 795                 return $this->currentTheme;
 796         }
 797
 798         public function setCurrentTheme($theme)
 799         {
 800                 $this->currentTheme = $theme;
 801         }
 802
 803         /**
 804          * Computes the current theme name based on the node settings, the user settings and the device type
 805          *
 806          * @throws Exception
 807          */
 808         private function computeCurrentTheme()
 809         {
 810                 $system_theme = $this->config->get('system', 'theme');
 811                 if (!$system_theme) {
 812                         throw new Exception($this->l10n->t('No system theme config value set.'));
 813                 }
 814
 815                 // Sane default
 816                 $this->currentTheme = $system_theme;
 817
 818                 $page_theme = null;
 819                 // Find the theme that belongs to the user whose stuff we are looking at
 820                 if ($this->profile_uid && ($this->profile_uid != local_user())) {
 821                         // Allow folks to override user themes and always use their own on their own site.
 822                         // This works only if the user is on the same server
 823                         $user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
 824                         if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
 825                                 $page_theme = $user['theme'];
 826                         }
 827                 }
 828
 829                 $user_theme = Core\Session::get('theme', $system_theme);
 830
 831                 // Specific mobile theme override
 832                 if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
 833                         $system_mobile_theme = $this->config->get('system', 'mobile-theme');
 834                         $user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
 835
 836                         // --- means same mobile theme as desktop
 837                         if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
 838                                 $user_theme = $user_mobile_theme;
 839                         }
 840                 }
 841
 842                 if ($page_theme) {
 843                         $theme_name = $page_theme;
 844                 } else {
 845                         $theme_name = $user_theme;
 846                 }
 847
 848                 $theme_name = Strings::sanitizeFilePathItem($theme_name);
 849                 if ($theme_name
 850                         && in_array($theme_name, Theme::getAllowedList())
 851                         && (file_exists('view/theme/' . $theme_name . '/style.css')
 852                         || file_exists('view/theme/' . $theme_name . '/style.php'))
 853                 ) {
 854                         $this->currentTheme = $theme_name;
 855                 }
 856         }
 857
 858         /**
 859          * @brief Return full URL to theme which is currently in effect.
 860          *
 861          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 862          *
 863          * @return string
 864          * @throws HTTPException\InternalServerErrorException
 865          */
 866         public function getCurrentThemeStylesheetPath()
 867         {
 868                 return Core\Theme::getStylesheetPath($this->getCurrentTheme());
 869         }
 870
 871         /**
 872          * Check if request was an AJAX (xmlhttprequest) request.
 873          *
 874          * @return boolean true if it was an AJAX request
 875          */
 876         public function isAjax()
 877         {
 878                 return $this->isAjax;
 879         }
 880
 881         /**
 882          * @deprecated use Arguments->get() instead
 883          *
 884          * @see App\Arguments
 885          */
 886         public function getArgumentValue($position, $default = '')
 887         {
 888                 return $this->args->get($position, $default);
 889         }
 890
 891         /**
 892          * Sets the base url for use in cmdline programs which don't have
 893          * $_SERVER variables
 894          */
 895         public function checkURL()
 896         {
 897                 $url = $this->config->get('system', 'url');
 898
 899                 // if the url isn't set or the stored url is radically different
 900                 // than the currently visited url, store the current value accordingly.
 901                 // "Radically different" ignores common variations such as http vs https
 902                 // and www.example.com vs example.com.
 903                 // We will only change the url to an ip address if there is no existing setting
 904
 905                 if (empty($url) || (!Util\Strings::compareLink($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->baseURL->getHostname()))) {
 906                         $this->config->set('system', 'url', $this->getBaseURL());
 907                 }
 908         }
 909
 910         /**
 911          * Frontend App script
 912          *
 913          * The App object behaves like a container and a dispatcher at the same time, including a representation of the
 914          * request and a representation of the response.
 915          *
 916          * This probably should change to limit the size of this monster method.
 917          *
 918          * @param App\Module $module The determined module
 919          */
 920         public function runFrontend(App\Module $module, App\Router $router, PConfiguration $pconfig)
 921         {
 922                 $moduleName = $module->getName();
 923
 924                 try {
 925                         // Missing DB connection: ERROR
 926                         if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
 927                                 throw new HTTPException\InternalServerErrorException('Apologies but the website is unavailable at the moment.');
 928                         }
 929
 930                         // Max Load Average reached: ERROR
 931                         if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
 932                                 header('Retry-After: 120');
 933                                 header('Refresh: 120; url=' . $this->baseURL->get() . "/" . $this->args->getQueryString());
 934
 935                                 throw new HTTPException\ServiceUnavailableException('The node is currently overloaded. Please try again later.');
 936                         }
 937
 938                         if (!$this->getMode()->isInstall()) {
 939                                 // Force SSL redirection
 940                                 if ($this->baseURL->checkRedirectHttps()) {
 941                                         System::externalRedirect($this->baseURL->get() . '/' . $this->args->getQueryString());
 942                                 }
 943
 944                                 Core\Session::init();
 945                                 Core\Hook::callAll('init_1');
 946                         }
 947
 948                         // Exclude the backend processes from the session management
 949                         if (!$this->isBackend()) {
 950                                 $stamp1 = microtime(true);
 951                                 session_start();
 952                                 $this->profiler->saveTimestamp($stamp1, 'parser', Core\System::callstack());
 953                                 $this->l10n->setSessionVariable();
 954                                 $this->l10n->setLangFromSession();
 955                         } else {
 956                                 $_SESSION = [];
 957                                 Core\Worker::executeIfIdle();
 958                         }
 959
 960                         if ($this->getMode()->isNormal()) {
 961                                 $requester = HTTPSignature::getSigner('', $_SERVER);
 962                                 if (!empty($requester)) {
 963                                         Profile::addVisitorCookieForHandle($requester);
 964                                 }
 965                         }
 966
 967                         // ZRL
 968                         if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
 969                                 if (!local_user()) {
 970                                         // Only continue when the given profile link seems valid
 971                                         // Valid profile links contain a path with "/profile/" and no query parameters
 972                                         if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
 973                                                 strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
 974                                                 if (Core\Session::get('visitor_home') != $_GET["zrl"]) {
 975                                                         Core\Session::set('my_url', $_GET['zrl']);
 976                                                         Core\Session::set('authenticated', 0);
 977                                                 }
 978
 979                                                 Model\Profile::zrlInit($this);
 980                                         } else {
 981                                                 // Someone came with an invalid parameter, maybe as a DDoS attempt
 982                                                 // We simply stop processing here
 983                                                 Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
 984                                                 throw new HTTPException\ForbiddenException();
 985                                         }
 986                                 }
 987                         }
 988
 989                         if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
 990                                 $token = $_GET['owt'];
 991                                 Model\Profile::openWebAuthInit($token);
 992                         }
 993
 994                         Login::sessionAuth();
 995
 996                         if (empty($_SESSION['authenticated'])) {
 997                                 header('X-Account-Management-Status: none');
 998                         }
 999
1000                         $_SESSION['sysmsg']       = Core\Session::get('sysmsg', []);
1001                         $_SESSION['sysmsg_info']  = Core\Session::get('sysmsg_info', []);
1002                         $_SESSION['last_updated'] = Core\Session::get('last_updated', []);
1003
1004                         /*
1005                          * check_config() is responsible for running update scripts. These automatically
1006                          * update the DB schema whenever we push a new one out. It also checks to see if
1007                          * any addons have been added or removed and reacts accordingly.
1008                          */
1009
1010                         // in install mode, any url loads install module
1011                         // but we need "view" module for stylesheet
1012                         if ($this->getMode()->isInstall() && $moduleName !== 'install') {
1013                                 $this->internalRedirect('install');
1014                         } elseif (!$this->getMode()->isInstall() && !$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $moduleName !== 'maintenance') {
1015                                 $this->internalRedirect('maintenance');
1016                         } else {
1017                                 $this->checkURL();
1018                                 Core\Update::check($this->getBasePath(), false, $this->getMode());
1019                                 Core\Addon::loadAddons();
1020                                 Core\Hook::loadHooks();
1021                         }
1022
1023                         $this->page = [
1024                                 'aside' => '',
1025                                 'bottom' => '',
1026                                 'content' => '',
1027                                 'footer' => '',
1028                                 'htmlhead' => '',
1029                                 'nav' => '',
1030                                 'page_title' => '',
1031                                 'right_aside' => '',
1032                                 'template' => '',
1033                                 'title' => ''
1034                         ];
1035
1036                         // Compatibility with the Android Diaspora client
1037                         if ($moduleName == 'stream') {
1038                                 $this->internalRedirect('network?order=post');
1039                         }
1040
1041                         if ($moduleName == 'conversations') {
1042                                 $this->internalRedirect('message');
1043                         }
1044
1045                         if ($moduleName == 'commented') {
1046                                 $this->internalRedirect('network?order=comment');
1047                         }
1048
1049                         if ($moduleName == 'liked') {
1050                                 $this->internalRedirect('network?order=comment');
1051                         }
1052
1053                         if ($moduleName == 'activity') {
1054                                 $this->internalRedirect('network?conv=1');
1055                         }
1056
1057                         if (($moduleName == 'status_messages') && ($this->args->getCommand() == 'status_messages/new')) {
1058                                 $this->internalRedirect('bookmarklet');
1059                         }
1060
1061                         if (($moduleName == 'user') && ($this->args->getCommand() == 'user/edit')) {
1062                                 $this->internalRedirect('settings');
1063                         }
1064
1065                         if (($moduleName == 'tag_followings') && ($this->args->getCommand() == 'tag_followings/manage')) {
1066                                 $this->internalRedirect('search');
1067                         }
1068
1069                         // Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
1070                         $this->page['page_title'] = $moduleName;
1071
1072                         // determine the module class and save it to the module instance
1073                         // @todo there's an implicit dependency due SESSION::start(), so it has to be called here (yet)
1074                         $module = $module->determineClass($this->args, $router, $this->config);
1075
1076                         // Let the module run it's internal process (init, get, post, ...)
1077                         $module->run($this->l10n, $this, $this->logger, $this->getCurrentTheme(), $_SERVER, $_POST);
1078
1079                 } catch(HTTPException $e) {
1080                         ModuleHTTPException::rawContent($e);
1081                 }
1082
1083                 $content = '';
1084
1085                 try {
1086                         $moduleClass = $module->getClassName();
1087
1088                         $arr = ['content' => $content];
1089                         Core\Hook::callAll($moduleClass . '_mod_content', $arr);
1090                         $content = $arr['content'];
1091                         $arr = ['content' => call_user_func([$moduleClass, 'content'])];
1092                         Core\Hook::callAll($moduleClass . '_mod_aftercontent', $arr);
1093                         $content .= $arr['content'];
1094                 } catch(HTTPException $e) {
1095                         $content = ModuleHTTPException::content($e);
1096                 }
1097
1098                 // initialise content region
1099                 if ($this->getMode()->isNormal()) {
1100                         Core\Hook::callAll('page_content_top', $this->page['content']);
1101                 }
1102
1103                 $this->page['content'] .= $content;
1104
1105                 /* Create the page head after setting the language
1106                  * and getting any auth credentials.
1107                  *
1108                  * Moved initHead() and initFooter() to after
1109                  * all the module functions have executed so that all
1110                  * theme choices made by the modules can take effect.
1111                  */
1112                 $this->initHead($module, $pconfig);
1113
1114                 /* Build the page ending -- this is stuff that goes right before
1115                  * the closing </body> tag
1116                  */
1117                 $this->initFooter();
1118
1119                 if (!$this->isAjax()) {
1120                         Core\Hook::callAll('page_end', $this->page['content']);
1121                 }
1122
1123                 // Add the navigation (menu) template
1124                 if ($moduleName != 'install' && $moduleName != 'maintenance') {
1125                         $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
1126                         $this->page['nav']       = Content\Nav::build($this);
1127                 }
1128
1129                 // Build the page - now that we have all the components
1130                 if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
1131                         $doc = new DOMDocument();
1132
1133                         $target = new DOMDocument();
1134                         $target->loadXML("<root></root>");
1135
1136                         $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
1137
1138                         /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
1139                         @$doc->loadHTML($content);
1140
1141                         $xpath = new DOMXPath($doc);
1142
1143                         $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]");  /* */
1144
1145                         foreach ($list as $item) {
1146                                 $item = $target->importNode($item, true);
1147
1148                                 // And then append it to the target
1149                                 $target->documentElement->appendChild($item);
1150                         }
1151
1152                         if ($_GET["mode"] == "raw") {
1153                                 header("Content-type: text/html; charset=utf-8");
1154
1155                                 echo substr($target->saveHTML(), 6, -8);
1156
1157                                 exit();
1158                         }
1159                 }
1160
1161                 $page    = $this->page;
1162                 $profile = $this->profile;
1163
1164                 header("X-Friendica-Version: " . FRIENDICA_VERSION);
1165                 header("Content-type: text/html; charset=utf-8");
1166
1167                 if ($this->config->get('system', 'hsts') && ($this->baseURL->getSSLPolicy() == BaseUrl::SSL_POLICY_FULL)) {
1168                         header("Strict-Transport-Security: max-age=31536000");
1169                 }
1170
1171                 // Some security stuff
1172                 header('X-Content-Type-Options: nosniff');
1173                 header('X-XSS-Protection: 1; mode=block');
1174                 header('X-Permitted-Cross-Domain-Policies: none');
1175                 header('X-Frame-Options: sameorigin');
1176
1177                 // Things like embedded OSM maps don't work, when this is enabled
1178                 // 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'");
1179
1180                 /* We use $_GET["mode"] for special page templates. So we will check if we have
1181                  * to load another page template than the default one.
1182                  * The page templates are located in /view/php/ or in the theme directory.
1183                  */
1184                 if (isset($_GET["mode"])) {
1185                         $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
1186                 }
1187
1188                 // If there is no page template use the default page template
1189                 if (empty($template)) {
1190                         $template = Core\Theme::getPathForFile("default.php");
1191                 }
1192
1193                 // Theme templates expect $a as an App instance
1194                 $a = $this;
1195
1196                 // Used as is in view/php/default.php
1197                 $lang = $this->l10n->getCurrentLang();
1198
1199                 /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
1200                 require_once $template;
1201         }
1202
1203         /**
1204          * Redirects to another module relative to the current Friendica base.
1205          * If you want to redirect to a external URL, use System::externalRedirectTo()
1206          *
1207          * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
1208          * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
1209          *
1210          * @throws HTTPException\InternalServerErrorException In Case the given URL is not relative to the Friendica node
1211          */
1212         public function internalRedirect($toUrl = '', $ssl = false)
1213         {
1214                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1215                         throw new HTTPException\InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
1216                 }
1217
1218                 $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
1219                 Core\System::externalRedirect($redirectTo);
1220         }
1221
1222         /**
1223          * Automatically redirects to relative or absolute URL
1224          * Should only be used if it isn't clear if the URL is either internal or external
1225          *
1226          * @param string $toUrl The target URL
1227          * @throws HTTPException\InternalServerErrorException
1228          */
1229         public function redirect($toUrl)
1230         {
1231                 if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
1232                         Core\System::externalRedirect($toUrl);
1233                 } else {
1234                         $this->internalRedirect($toUrl);
1235                 }
1236         }
1237 }