+
+ /**
+ * Sets the base url for use in cmdline programs which don't have
+ * $_SERVER variables
+ */
+ public function checkURL()
+ {
+ $url = Core\Config::get('system', 'url');
+
+ // if the url isn't set or the stored url is radically different
+ // than the currently visited url, store the current value accordingly.
+ // "Radically different" ignores common variations such as http vs https
+ // and www.example.com vs example.com.
+ // We will only change the url to an ip address if there is no existing setting
+
+ if (empty($url) || (!link_compare($url, $this->getBaseURL())) && (!preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $this->getHostName()))) {
+ Core\Config::set('system', 'url', $this->getBaseURL());
+ }
+ }
+
+ /**
+ * Frontend App script
+ *
+ * The App object behaves like a container and a dispatcher at the same time, including a representation of the
+ * request and a representation of the response.
+ *
+ * This probably should change to limit the size of this monster method.
+ */
+ public function runFrontend()
+ {
+ // Missing DB connection: ERROR
+ if ($this->getMode()->has(App\Mode::LOCALCONFIGPRESENT) && !$this->getMode()->has(App\Mode::DBAVAILABLE)) {
+ Core\System::httpExit(500, ['title' => 'Error 500 - Internal Server Error', 'description' => 'Apologies but the website is unavailable at the moment.']);
+ }
+
+ // Max Load Average reached: ERROR
+ if ($this->isMaxProcessesReached() || $this->isMaxLoadReached()) {
+ header('Retry-After: 120');
+ header('Refresh: 120; url=' . $this->getBaseURL() . "/" . $this->query_string);
+
+ Core\System::httpExit(503, ['title' => 'Error 503 - Service Temporarily Unavailable', 'description' => 'Core\System is currently overloaded. Please try again later.']);
+ }
+
+ if (strstr($this->query_string, '.well-known/host-meta') && ($this->query_string != '.well-known/host-meta')) {
+ Core\System::httpExit(404);
+ }
+
+ if (!$this->getMode()->isInstall()) {
+ // Force SSL redirection
+ if (Core\Config::get('system', 'force_ssl') && ($this->getScheme() == "http")
+ && intval(Core\Config::get('system', 'ssl_policy')) == SSL_POLICY_FULL
+ && strpos($this->getBaseURL(), 'https://') === 0
+ && $_SERVER['REQUEST_METHOD'] == 'GET') {
+ header('HTTP/1.1 302 Moved Temporarily');
+ header('Location: ' . $this->getBaseURL() . '/' . $this->query_string);
+ exit();
+ }
+
+ Core\Session::init();
+ Core\Addon::callHooks('init_1');
+ }
+
+ // Exclude the backend processes from the session management
+ if (!$this->isBackend()) {
+ $stamp1 = microtime(true);
+ session_start();
+ $this->saveTimestamp($stamp1, 'parser');
+ Core\L10n::setSessionVariable();
+ Core\L10n::setLangFromSession();
+ } else {
+ $_SESSION = [];
+ Core\Worker::executeIfIdle();
+ }
+
+ // ZRL
+ if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
+ $this->query_string = Model\Profile::stripZrls($this->query_string);
+ if (!local_user()) {
+ // Only continue when the given profile link seems valid
+ // Valid profile links contain a path with "/profile/" and no query parameters
+ if ((parse_url($_GET['zrl'], PHP_URL_QUERY) == "") &&
+ strstr(parse_url($_GET['zrl'], PHP_URL_PATH), "/profile/")) {
+ if (defaults($_SESSION, "visitor_home", "") != $_GET["zrl"]) {
+ $_SESSION['my_url'] = $_GET['zrl'];
+ $_SESSION['authenticated'] = 0;
+ }
+ Model\Profile::zrlInit($this);
+ } else {
+ // Someone came with an invalid parameter, maybe as a DDoS attempt
+ // We simply stop processing here
+ Core\Logger::log("Invalid ZRL parameter " . $_GET['zrl'], Core\Logger::DEBUG);
+ Core\System::httpExit(403, ['title' => '403 Forbidden']);
+ }
+ }
+ }
+
+ if (!empty($_GET['owt']) && $this->getMode()->isNormal()) {
+ $token = $_GET['owt'];
+ $this->query_string = Model\Profile::stripQueryParam($this->query_string, 'owt');
+ Model\Profile::openWebAuthInit($token);
+ }
+
+ Module\Login::sessionAuth();
+
+ if (empty($_SESSION['authenticated'])) {
+ header('X-Account-Management-Status: none');
+ }
+
+ $_SESSION['sysmsg'] = defaults($_SESSION, 'sysmsg' , []);
+ $_SESSION['sysmsg_info'] = defaults($_SESSION, 'sysmsg_info' , []);
+ $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
+
+ /*
+ * check_config() is responsible for running update scripts. These automatically
+ * update the DB schema whenever we push a new one out. It also checks to see if
+ * any addons have been added or removed and reacts accordingly.
+ */
+
+ // in install mode, any url loads install module
+ // but we need "view" module for stylesheet
+ if ($this->getMode()->isInstall() && $this->module != 'view') {
+ $this->module = 'install';
+ } elseif (!$this->getMode()->has(App\Mode::MAINTENANCEDISABLED) && $this->module != 'view') {
+ $this->module = 'maintenance';
+ } else {
+ $this->checkURL();
+ Core\Update::check(false);
+ Core\Addon::loadAddons();
+ Core\Hook::loadHooks();
+ }
+
+ $this->page = [
+ 'aside' => '',
+ 'bottom' => '',
+ 'content' => '',
+ 'footer' => '',
+ 'htmlhead' => '',
+ 'nav' => '',
+ 'page_title' => '',
+ 'right_aside' => '',
+ 'template' => '',
+ 'title' => ''
+ ];
+
+ if (strlen($this->module)) {
+ // Compatibility with the Android Diaspora client
+ if ($this->module == 'stream') {
+ $this->internalRedirect('network?f=&order=post');
+ }
+
+ if ($this->module == 'conversations') {
+ $this->internalRedirect('message');
+ }
+
+ if ($this->module == 'commented') {
+ $this->internalRedirect('network?f=&order=comment');
+ }
+
+ if ($this->module == 'liked') {
+ $this->internalRedirect('network?f=&order=comment');
+ }
+
+ if ($this->module == 'activity') {
+ $this->internalRedirect('network/?f=&conv=1');
+ }
+
+ if (($this->module == 'status_messages') && ($this->cmd == 'status_messages/new')) {
+ $this->internalRedirect('bookmarklet');
+ }
+
+ if (($this->module == 'user') && ($this->cmd == 'user/edit')) {
+ $this->internalRedirect('settings');
+ }
+
+ if (($this->module == 'tag_followings') && ($this->cmd == 'tag_followings/manage')) {
+ $this->internalRedirect('search');
+ }
+
+ // Compatibility with the Firefox App
+ if (($this->module == "users") && ($this->cmd == "users/sign_in")) {
+ $this->module = "login";
+ }
+
+ $privateapps = Core\Config::get('config', 'private_addons', false);
+ if (Core\Addon::isEnabled($this->module) && file_exists("addon/{$this->module}/{$this->module}.php")) {
+ //Check if module is an app and if public access to apps is allowed or not
+ if ((!local_user()) && Core\Hook::isAddonApp($this->module) && $privateapps) {
+ info(Core\L10n::t("You must be logged in to use addons. "));
+ } else {
+ include_once "addon/{$this->module}/{$this->module}.php";
+ if (function_exists($this->module . '_module')) {
+ LegacyModule::setModuleFile("addon/{$this->module}/{$this->module}.php");
+ $this->module_class = 'Friendica\\LegacyModule';
+ $this->module_loaded = true;
+ }
+ }
+ }
+
+ // Controller class routing
+ if (! $this->module_loaded && class_exists('Friendica\\Module\\' . ucfirst($this->module))) {
+ $this->module_class = 'Friendica\\Module\\' . ucfirst($this->module);
+ $this->module_loaded = true;
+ }
+
+ /* If not, next look for a 'standard' program module in the 'mod' directory
+ * We emulate a Module class through the LegacyModule class
+ */
+ if (! $this->module_loaded && file_exists("mod/{$this->module}.php")) {
+ LegacyModule::setModuleFile("mod/{$this->module}.php");
+ $this->module_class = 'Friendica\\LegacyModule';
+ $this->module_loaded = true;
+ }
+
+ /* The URL provided does not resolve to a valid module.
+ *
+ * On Dreamhost sites, quite often things go wrong for no apparent reason and they send us to '/internal_error.html'.
+ * We don't like doing this, but as it occasionally accounts for 10-20% or more of all site traffic -
+ * we are going to trap this and redirect back to the requested page. As long as you don't have a critical error on your page
+ * this will often succeed and eventually do the right thing.
+ *
+ * Otherwise we are going to emit a 404 not found.
+ */
+ if (! $this->module_loaded) {
+ // Stupid browser tried to pre-fetch our Javascript img template. Don't log the event or return anything - just quietly exit.
+ if (!empty($_SERVER['QUERY_STRING']) && preg_match('/{[0-9]}/', $_SERVER['QUERY_STRING']) !== 0) {
+ exit();
+ }
+
+ if (!empty($_SERVER['QUERY_STRING']) && ($_SERVER['QUERY_STRING'] === 'q=internal_error.html') && isset($dreamhost_error_hack)) {
+ Core\Logger::log('index.php: dreamhost_error_hack invoked. Original URI =' . $_SERVER['REQUEST_URI']);
+ $this->internalRedirect($_SERVER['REQUEST_URI']);
+ }
+
+ Core\Logger::log('index.php: page not found: ' . $_SERVER['REQUEST_URI'] . ' ADDRESS: ' . $_SERVER['REMOTE_ADDR'] . ' QUERY: ' . $_SERVER['QUERY_STRING'], Core\Logger::DEBUG);
+
+ header($_SERVER["SERVER_PROTOCOL"] . ' 404 ' . Core\L10n::t('Not Found'));
+ $tpl = Core\Renderer::getMarkupTemplate("404.tpl");
+ $this->page['content'] = Core\Renderer::replaceMacros($tpl, [
+ '$message' => Core\L10n::t('Page not found.')
+ ]);
+ }
+ }
+
+ // Load current theme info
+ $theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
+ if (file_exists($theme_info_file)) {
+ require_once $theme_info_file;
+ }
+
+ // initialise content region
+ if ($this->getMode()->isNormal()) {
+ Core\Addon::callHooks('page_content_top', $this->page['content']);
+ }
+
+ // Call module functions
+ if ($this->module_loaded) {
+ $this->page['page_title'] = $this->module;
+ $placeholder = '';
+
+ Core\Addon::callHooks($this->module . '_mod_init', $placeholder);
+
+ call_user_func([$this->module_class, 'init']);
+
+ // "rawContent" is especially meant for technical endpoints.
+ // This endpoint doesn't need any theme initialization or other comparable stuff.
+ if (!$this->error) {
+ call_user_func([$this->module_class, 'rawContent']);
+ }
+
+ if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
+ $func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
+ $func($this);
+ }
+
+ if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
+ Core\Addon::callHooks($this->module . '_mod_post', $_POST);
+ call_user_func([$this->module_class, 'post']);
+ }
+
+ if (! $this->error) {
+ Core\Addon::callHooks($this->module . '_mod_afterpost', $placeholder);
+ call_user_func([$this->module_class, 'afterpost']);
+ }
+
+ if (! $this->error) {
+ $arr = ['content' => $this->page['content']];
+ Core\Addon::callHooks($this->module . '_mod_content', $arr);
+ $this->page['content'] = $arr['content'];
+ $arr = ['content' => call_user_func([$this->module_class, 'content'])];
+ Core\Addon::callHooks($this->module . '_mod_aftercontent', $arr);
+ $this->page['content'] .= $arr['content'];
+ }
+
+ if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_content_loaded')) {
+ $func = str_replace('-', '_', $this->getCurrentTheme()) . '_content_loaded';
+ $func($this);
+ }
+ }
+
+ /* Create the page head after setting the language
+ * and getting any auth credentials.
+ *
+ * Moved initHead() and initFooter() to after
+ * all the module functions have executed so that all
+ * theme choices made by the modules can take effect.
+ */
+ $this->initHead();
+
+ /* Build the page ending -- this is stuff that goes right before
+ * the closing </body> tag
+ */
+ $this->initFooter();
+
+ /* now that we've been through the module content, see if the page reported
+ * a permission problem and if so, a 403 response would seem to be in order.
+ */
+ if (stristr(implode("", $_SESSION['sysmsg']), Core\L10n::t('Permission denied'))) {
+ header($_SERVER["SERVER_PROTOCOL"] . ' 403 ' . Core\L10n::t('Permission denied.'));
+ }
+
+ // Report anything which needs to be communicated in the notification area (before the main body)
+ Core\Addon::callHooks('page_end', $this->page['content']);
+
+ // Add the navigation (menu) template
+ if ($this->module != 'install' && $this->module != 'maintenance') {
+ $this->page['htmlhead'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate('nav_head.tpl'), []);
+ $this->page['nav'] = Content\Nav::build($this);
+ }
+
+ // Build the page - now that we have all the components
+ if (isset($_GET["mode"]) && (($_GET["mode"] == "raw") || ($_GET["mode"] == "minimal"))) {
+ $doc = new DOMDocument();
+
+ $target = new DOMDocument();
+ $target->loadXML("<root></root>");
+
+ $content = mb_convert_encoding($this->page["content"], 'HTML-ENTITIES', "UTF-8");
+
+ /// @TODO one day, kill those error-surpressing @ stuff, or PHP should ban it
+ @$doc->loadHTML($content);
+
+ $xpath = new DOMXPath($doc);
+
+ $list = $xpath->query("//*[contains(@id,'tread-wrapper-')]"); /* */
+
+ foreach ($list as $item) {
+ $item = $target->importNode($item, true);
+
+ // And then append it to the target
+ $target->documentElement->appendChild($item);
+ }
+ }
+
+ if (isset($_GET["mode"]) && ($_GET["mode"] == "raw")) {
+ header("Content-type: text/html; charset=utf-8");
+
+ echo substr($target->saveHTML(), 6, -8);
+
+ exit();
+ }
+
+ $page = $this->page;
+ $profile = $this->profile;
+
+ header("X-Friendica-Version: " . FRIENDICA_VERSION);
+ header("Content-type: text/html; charset=utf-8");
+
+ if (Core\Config::get('system', 'hsts') && (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL)) {
+ header("Strict-Transport-Security: max-age=31536000");
+ }
+
+ // Some security stuff
+ header('X-Content-Type-Options: nosniff');
+ header('X-XSS-Protection: 1; mode=block');
+ header('X-Permitted-Cross-Domain-Policies: none');
+ header('X-Frame-Options: sameorigin');
+
+ // Things like embedded OSM maps don't work, when this is enabled
+ // 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'");
+
+ /* We use $_GET["mode"] for special page templates. So we will check if we have
+ * to load another page template than the default one.
+ * The page templates are located in /view/php/ or in the theme directory.
+ */
+ if (isset($_GET["mode"])) {
+ $template = Core\Theme::getPathForFile($_GET["mode"] . '.php');
+ }
+
+ // If there is no page template use the default page template
+ if (empty($template)) {
+ $template = Core\Theme::getPathForFile("default.php");
+ }
+
+ // Theme templates expect $a as an App instance
+ $a = $this;
+
+ // Used as is in view/php/default.php
+ $lang = Core\L10n::getCurrentLang();
+
+ /// @TODO Looks unsafe (remote-inclusion), is maybe not but Core\Theme::getPathForFile() uses file_exists() but does not escape anything
+ require_once $template;
+ }
+
+ /**
+ * Redirects to another module relative to the current Friendica base.
+ * If you want to redirect to a external URL, use System::externalRedirectTo()
+ *
+ * @param string $toUrl The destination URL (Default is empty, which is the default page of the Friendica node)
+ * @param bool $ssl if true, base URL will try to get called with https:// (works just for relative paths)
+ *
+ * @throws InternalServerErrorException In Case the given URL is not relative to the Friendica node
+ */
+ public function internalRedirect($toUrl = '', $ssl = false)
+ {
+ if (filter_var($toUrl, FILTER_VALIDATE_URL)) {
+ throw new InternalServerErrorException("'$toUrl is not a relative path, please use System::externalRedirectTo");
+ }
+
+ $redirectTo = $this->getBaseURL($ssl) . '/' . ltrim($toUrl, '/');
+ Core\System::externalRedirect($redirectTo);
+ }
+
+ /**
+ * Automatically redirects to relative or absolute URL
+ * Should only be used if it isn't clear if the URL is either internal or external
+ *
+ * @param string $toUrl The target URL
+ *
+ */
+ public function redirect($toUrl)
+ {
+ if (filter_var($toUrl, FILTER_VALIDATE_URL)) {
+ Core\System::externalRedirect($toUrl);
+ } else {
+ $this->internalRedirect($toUrl);
+ }
+ }