<?php
/**
* @file src/App.php
*/
namespace Friendica;
use Detection\MobileDetect;
use DOMDocument;
use DOMXPath;
use Exception;
use Friendica\Core\Config\ConfigCache;
use Friendica\Core\Config\ConfigCacheLoader;
use Friendica\Database\DBA;
use Friendica\Factory\ConfigFactory;
use Friendica\Network\HTTPException\InternalServerErrorException;
use Friendica\Util\BasePath;
use Psr\Log\LoggerInterface;
/**
*
* class: App
*
* @brief Our main application structure for the life of this page.
*
* Primarily deals with the URL that got us here
* and tries to make some sense of it, and
* stores our page contents and config storage
* and anything else that might need to be passed around
* before we spit the page out.
*
*/
class App
{
public $module_loaded = false;
public $module_class = null;
public $query_string = '';
public $page = [];
public $profile;
public $profile_uid;
public $user;
public $cid;
public $contact;
public $contacts;
public $page_contact;
public $content;
public $data = [];
public $error = false;
public $cmd = '';
public $argv;
public $argc;
public $module;
public $timezone;
public $interactive = true;
public $identities;
public $is_mobile = false;
public $is_tablet = false;
public $performance = [];
public $callstack = [];
public $theme_info = [];
public $category;
// Allow themes to control internal parameters
// by changing App values in theme.php
public $sourcename = '';
public $videowidth = 425;
public $videoheight = 350;
public $force_max_items = 0;
public $theme_events_in_profile = true;
public $stylesheets = [];
public $footerScripts = [];
/**
* @var App\Mode The Mode of the Application
*/
private $mode;
/**
* @var string The App base path
*/
private $basePath;
/**
* @var string The App URL path
*/
private $urlPath;
/**
* @var bool true, if the call is from the Friendica APP, otherwise false
*/
private $isFriendicaApp;
/**
* @var bool true, if the call is from an backend node (f.e. worker)
*/
private $isBackend;
/**
* @var string The name of the current theme
*/
private $currentTheme;
/**
* @var bool check if request was an AJAX (xmlhttprequest) request
*/
private $isAjax;
/**
* @var MobileDetect
*/
public $mobileDetect;
/**
* @var LoggerInterface The current logger of this App
*/
private $logger;
/**
* @var ConfigCache The cached config
*/
private $config;
/**
* Returns the current config cache of this node
*
* @return ConfigCache
*/
public function getConfig()
{
return $this->config;
}
/**
* The basepath of this app
*
* @return string
*/
public function getBasePath()
{
return $this->basePath;
}
/**
* Register a stylesheet file path to be included in the <head> tag of every page.
* Inclusion is done in App->initHead().
* The path can be absolute or relative to the Friendica installation base folder.
*
* @see initHead()
*
* @param string $path
* @throws InternalServerErrorException
*/
public function registerStylesheet($path)
{
$url = str_replace($this->basePath . DIRECTORY_SEPARATOR, '', $path);
$this->stylesheets[] = trim($url, '/');
}
/**
* Register a javascript file path to be included in the <footer> tag of every page.
* Inclusion is done in App->initFooter().
* The path can be absolute or relative to the Friendica installation base folder.
*
* @see initFooter()
*
* @param string $path
* @throws InternalServerErrorException
*/
public function registerFooterScript($path)
{
$url = str_replace($this->basePath . DIRECTORY_SEPARATOR, '', $path);
$this->footerScripts[] = trim($url, '/');
}
public $process_id;
public $queue;
private $scheme;
private $hostname;
/**
* @brief App constructor.
*
* @param ConfigCache $config The Cached Config
* @param LoggerInterface $logger Logger of this application
* @param bool $isBackend Whether it is used for backend or frontend (Default true=backend)
*
* @throws Exception if the Basepath is not usable
*/
public function __construct(ConfigCache $config, LoggerInterface $logger, $isBackend = true)
{
$this->config = $config;
$this->logger = $logger;
$this->basePath = $this->config->get('system', 'basepath');
if (!BasePath::isDirectoryUsable($this->basePath, false)) {
throw new Exception('Basepath ' . $this->basePath . ' isn\'t usable.');
}
$this->basePath = rtrim($this->basePath, DIRECTORY_SEPARATOR);
BaseObject::setApp($this);
$this->checkBackend($isBackend);
$this->checkFriendicaApp();
$this->performance['start'] = microtime(true);
$this->performance['database'] = 0;
$this->performance['database_write'] = 0;
$this->performance['cache'] = 0;
$this->performance['cache_write'] = 0;
$this->performance['network'] = 0;
$this->performance['file'] = 0;
$this->performance['rendering'] = 0;
$this->performance['parser'] = 0;
$this->performance['marktime'] = 0;
$this->performance['markstart'] = microtime(true);
$this->callstack['database'] = [];
$this->callstack['database_write'] = [];
$this->callstack['cache'] = [];
$this->callstack['cache_write'] = [];
$this->callstack['network'] = [];
$this->callstack['file'] = [];
$this->callstack['rendering'] = [];
$this->callstack['parser'] = [];
$this->mode = new App\Mode($this->basePath);
$this->reload();
set_time_limit(0);
// This has to be quite large to deal with embedded private photos
ini_set('pcre.backtrack_limit', 500000);
$this->scheme = 'http';
if (!empty($_SERVER['HTTPS']) ||
!empty($_SERVER['HTTP_FORWARDED']) && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED']) ||
!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ||
!empty($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on' ||
!empty($_SERVER['FRONT_END_HTTPS']) && $_SERVER['FRONT_END_HTTPS'] == 'on' ||
!empty($_SERVER['SERVER_PORT']) && (intval($_SERVER['SERVER_PORT']) == 443) // XXX: reasonable assumption, but isn't this hardcoding too much?
) {
$this->scheme = 'https';
}
if (!empty($_SERVER['SERVER_NAME'])) {
$this->hostname = $_SERVER['SERVER_NAME'];
if (!empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) {
$this->hostname .= ':' . $_SERVER['SERVER_PORT'];
}
}
set_include_path(
get_include_path() . PATH_SEPARATOR
. $this->basePath . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR
. $this->basePath . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR
. $this->basePath);
if (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'pagename=') === 0) {
$this->query_string = substr($_SERVER['QUERY_STRING'], 9);
} elseif (!empty($_SERVER['QUERY_STRING']) && strpos($_SERVER['QUERY_STRING'], 'q=') === 0) {
$this->query_string = substr($_SERVER['QUERY_STRING'], 2);
}
// removing trailing / - maybe a nginx problem
$this->query_string = ltrim($this->query_string, '/');
if (!empty($_GET['pagename'])) {
$this->cmd = trim($_GET['pagename'], '/\\');
} elseif (!empty($_GET['q'])) {
$this->cmd = trim($_GET['q'], '/\\');
}
// fix query_string
$this->query_string = str_replace($this->cmd . '&', $this->cmd . '?', $this->query_string);
// unix style "homedir"
if (substr($this->cmd, 0, 1) === '~') {
$this->cmd = 'profile/' . substr($this->cmd, 1);
}
// Diaspora style profile url
if (substr($this->cmd, 0, 2) === 'u/') {
$this->cmd = 'profile/' . substr($this->cmd, 2);
}
/*
* Break the URL path into C style argc/argv style arguments for our
* modules. Given "http://example.com/module/arg1/arg2", $this->argc
* will be 3 (integer) and $this->argv will contain:
* [0] => 'module'
* [1] => 'arg1'
* [2] => 'arg2'
*
*
* There will always be one argument. If provided a naked domain
* URL, $this->argv[0] is set to "home".
*/
$this->argv = explode('/', $this->cmd);
$this->argc = count($this->argv);
if ((array_key_exists('0', $this->argv)) && strlen($this->argv[0])) {
$this->module = str_replace('.', '_', $this->argv[0]);
$this->module = str_replace('-', '_', $this->module);
} else {
$this->argc = 1;
$this->argv = ['home'];
$this->module = 'home';
}
// Detect mobile devices
$mobile_detect = new MobileDetect();
$this->mobileDetect = $mobile_detect;
$this->is_mobile = $mobile_detect->isMobile();
$this->is_tablet = $mobile_detect->isTablet();
$this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
// Register template engines
Core\Renderer::registerTemplateEngine('Friendica\Render\FriendicaSmartyEngine');
}
/**
* Returns the Mode of the Application
*
* @return App\Mode The Application Mode
*
* @throws InternalServerErrorException when the mode isn't created
*/
public function getMode()
{
if (empty($this->mode)) {
throw new InternalServerErrorException('Mode of the Application is not defined');
}
return $this->mode;
}
/**
* Returns the Logger of the Application
*
* @return LoggerInterface The Logger
* @throws InternalServerErrorException when the logger isn't created
*/
public function getLogger()
{
if (empty($this->logger)) {
throw new InternalServerErrorException('Logger of the Application is not defined');
}
return $this->logger;
}
/**
* Reloads the whole app instance
*/
public function reload()
{
Core\Config::init($this->config);
Core\PConfig::init($this->config);
$this->loadDatabase();
$this->getMode()->determine($this->basePath);
$this->determineURLPath();
if ($this->getMode()->has(App\Mode::DBCONFIGAVAILABLE)) {
$adapterType = $this->config->get('system', 'config_adapter');
$adapter = ConfigFactory::createConfig($adapterType, $this->config);
Core\Config::setAdapter($adapter);
$adapterP = ConfigFactory::createPConfig($adapterType, $this->config);
Core\PConfig::setAdapter($adapterP);
Core\Config::load();
}
// again because DB-config could change the config
$this->getMode()->determine($this->basePath);
if ($this->getMode()->has(App\Mode::DBAVAILABLE)) {
Core\Hook::loadHooks();
$loader = new ConfigCacheLoader($this->basePath);
Core\Hook::callAll('load_config', $loader);
$this->config->loadConfigArray($loader->loadCoreConfig('addon'), true);
}
$this->loadDefaultTimezone();
Core\L10n::init();
$this->process_id = Core\System::processID('log');
Core\Logger::setLogger($this->logger);
}
/**
* Loads the default timezone
*
* Include support for legacy $default_timezone
*
* @global string $default_timezone
*/
private function loadDefaultTimezone()
{
if ($this->config->get('system', 'default_timezone')) {
$this->timezone = $this->config->get('system', 'default_timezone');
} else {
global $default_timezone;
$this->timezone = !empty($default_timezone) ? $default_timezone : 'UTC';
}
if ($this->timezone) {
date_default_timezone_set($this->timezone);
}
}
/**
* Figure out if we are running at the top of a domain or in a sub-directory and adjust accordingly
*/
private function determineURLPath()
{
/* Relative script path to the web server root
* Not all of those $_SERVER properties can be present, so we do by inverse priority order
*/
$relative_script_path = '';
$relative_script_path = defaults($_SERVER, 'REDIRECT_URL' , $relative_script_path);
$relative_script_path = defaults($_SERVER, 'REDIRECT_URI' , $relative_script_path);
$relative_script_path = defaults($_SERVER, 'REDIRECT_SCRIPT_URL', $relative_script_path);
$relative_script_path = defaults($_SERVER, 'SCRIPT_URL' , $relative_script_path);
$relative_script_path = defaults($_SERVER, 'REQUEST_URI' , $relative_script_path);
$this->urlPath = $this->config->get('system', 'urlpath');
/* $relative_script_path gives /relative/path/to/friendica/module/parameter
* QUERY_STRING gives pagename=module/parameter
*
* To get /relative/path/to/friendica we perform dirname() for as many levels as there are slashes in the QUERY_STRING
*/
if (!empty($relative_script_path)) {
// Module
if (!empty($_SERVER['QUERY_STRING'])) {
$path = trim(rdirname($relative_script_path, substr_count(trim($_SERVER['QUERY_STRING'], '/'), '/') + 1), '/');
} else {
// Root page
$path = trim($relative_script_path, '/');
}
if ($path && $path != $this->urlPath) {
$this->urlPath = $path;
}
}
}
public function loadDatabase()
{
if (DBA::connected()) {
return;
}
$db_host = $this->config->get('database', 'hostname');
$db_user = $this->config->get('database', 'username');
$db_pass = $this->config->get('database', 'password');
$db_data = $this->config->get('database', 'database');
$charset = $this->config->get('database', 'charset');
// Use environment variables for mysql if they are set beforehand
if (!empty(getenv('MYSQL_HOST'))
&& !empty(getenv('MYSQL_USERNAME') || !empty(getenv('MYSQL_USER')))
&& getenv('MYSQL_PASSWORD') !== false
&& !empty(getenv('MYSQL_DATABASE')))
{
$db_host = getenv('MYSQL_HOST');
if (!empty(getenv('MYSQL_PORT'))) {
$db_host .= ':' . getenv('MYSQL_PORT');
}
if (!empty(getenv('MYSQL_USERNAME'))) {
$db_user = getenv('MYSQL_USERNAME');
} else {
$db_user = getenv('MYSQL_USER');
}
$db_pass = (string) getenv('MYSQL_PASSWORD');
$db_data = getenv('MYSQL_DATABASE');
}
$stamp1 = microtime(true);
if (DBA::connect($this->config, $db_host, $db_user, $db_pass, $db_data, $charset)) {
// Loads DB_UPDATE_VERSION constant
Database\DBStructure::definition($this->basePath, false);
}
unset($db_host, $db_user, $db_pass, $db_data, $charset);
$this->saveTimestamp($stamp1, 'network');
}
public function getScheme()
{
return $this->scheme;
}
/**
* @brief Retrieves the Friendica instance base URL
*
* This function assembles the base URL from multiple parts:
* - Protocol is determined either by the request or a combination of
* system.ssl_policy and the $ssl parameter.
* - Host name is determined either by system.hostname or inferred from request
* - Path is inferred from SCRIPT_NAME
*
* Note: $ssl parameter value doesn't directly correlate with the resulting protocol
*
* @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
* @return string Friendica server base URL
* @throws InternalServerErrorException
*/
public function getBaseURL($ssl = false)
{
$scheme = $this->scheme;
if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
$scheme = 'https';
}
// Basically, we have $ssl = true on any links which can only be seen by a logged in user
// (and also the login link). Anything seen by an outsider will have it turned off.
if (Core\Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) {
if ($ssl) {
$scheme = 'https';
} else {
$scheme = 'http';
}
}
if (Core\Config::get('config', 'hostname') != '') {
$this->hostname = Core\Config::get('config', 'hostname');
}
return $scheme . '://' . $this->hostname . (!empty($this->getURLPath()) ? '/' . $this->getURLPath() : '' );
}
/**
* @brief Initializes the baseurl components
*
* Clears the baseurl cache to prevent inconsistencies
*
* @param string $url
* @throws InternalServerErrorException
*/
public function setBaseURL($url)
{
$parsed = @parse_url($url);
$hostname = '';
if (!empty($parsed)) {
if (!empty($parsed['scheme'])) {
$this->scheme = $parsed['scheme'];
}
if (!empty($parsed['host'])) {
$hostname = $parsed['host'];
}
if (!empty($parsed['port'])) {
$hostname .= ':' . $parsed['port'];
}
if (!empty($parsed['path'])) {
$this->urlPath = trim($parsed['path'], '\\/');
}
if (file_exists($this->basePath . '/.htpreconfig.php')) {
include $this->basePath . '/.htpreconfig.php';
}
if (Core\Config::get('config', 'hostname') != '') {
$this->hostname = Core\Config::get('config', 'hostname');
}
if (!isset($this->hostname) || ($this->hostname == '')) {
$this->hostname = $hostname;
}
}
}
public function getHostName()
{
if (Core\Config::get('config', 'hostname') != '') {
$this->hostname = Core\Config::get('config', 'hostname');
}
return $this->hostname;
}
public function getURLPath()
{
return $this->urlPath;
}
/**
* Initializes App->page['htmlhead'].
*
* Includes:
* - Page title
* - Favicons
* - Registered stylesheets (through App->registerStylesheet())
* - Infinite scroll data
* - head.tpl template
*/
public function initHead()
{
$interval = ((local_user()) ? Core\PConfig::get(local_user(), 'system', 'update_interval') : 40000);
// If the update is 'deactivated' set it to the highest integer number (~24 days)
if ($interval < 0) {
$interval = 2147483647;
}
if ($interval < 10000) {
$interval = 40000;
}
// compose the page title from the sitename and the
// current module called
if (!$this->module == '') {
$this->page['title'] = $this->config->get('config', 'sitename') . ' (' . $this->module . ')';
} else {
$this->page['title'] = $this->config->get('config', 'sitename');
}
if (!empty(Core\Renderer::$theme['stylesheet'])) {
$stylesheet = Core\Renderer::$theme['stylesheet'];
} else {
$stylesheet = $this->getCurrentThemeStylesheetPath();
}
$this->registerStylesheet($stylesheet);
$shortcut_icon = Core\Config::get('system', 'shortcut_icon');
if ($shortcut_icon == '') {
$shortcut_icon = 'images/friendica-32.png';
}
$touch_icon = Core\Config::get('system', 'touch_icon');
if ($touch_icon == '') {
$touch_icon = 'images/friendica-128.png';
}
Core\Hook::callAll('head', $this->page['htmlhead']);
$tpl = Core\Renderer::getMarkupTemplate('head.tpl');
/* put the head template at the beginning of page['htmlhead']
* since the code added by the modules frequently depends on it
* being first
*/
$this->page['htmlhead'] = Core\Renderer::replaceMacros($tpl, [
'$baseurl' => $this->getBaseURL(),
'$local_user' => local_user(),
'$generator' => 'Friendica' . ' ' . FRIENDICA_VERSION,
'$delitem' => Core\L10n::t('Delete this item?'),
'$showmore' => Core\L10n::t('show more'),
'$showfewer' => Core\L10n::t('show fewer'),
'$update_interval' => $interval,
'$shortcut_icon' => $shortcut_icon,
'$touch_icon' => $touch_icon,
'$block_public' => intval(Core\Config::get('system', 'block_public')),
'$stylesheets' => $this->stylesheets,
]) . $this->page['htmlhead'];
}
/**
* Initializes App->page['footer'].
*
* Includes:
* - Javascript homebase
* - Mobile toggle link
* - Registered footer scripts (through App->registerFooterScript())
* - footer.tpl template
*/
public function initFooter()
{
// If you're just visiting, let javascript take you home
if (!empty($_SESSION['visitor_home'])) {
$homebase = $_SESSION['visitor_home'];
} elseif (local_user()) {
$homebase = 'profile/' . $this->user['nickname'];
}
if (isset($homebase)) {
$this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
}
/*
* Add a "toggle mobile" link if we're using a mobile device
*/
if ($this->is_mobile || $this->is_tablet) {
if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
$link = 'toggle_mobile?address=' . urlencode(curPageURL());
} else {
$link = 'toggle_mobile?off=1&address=' . urlencode(curPageURL());
}
$this->page['footer'] .= Core\Renderer::replaceMacros(Core\Renderer::getMarkupTemplate("toggle_mobile_footer.tpl"), [
'$toggle_link' => $link,
'$toggle_text' => Core\L10n::t('toggle mobile')
]);
}
Core\Hook::callAll('footer', $this->page['footer']);
$tpl = Core\Renderer::getMarkupTemplate('footer.tpl');
$this->page['footer'] = Core\Renderer::replaceMacros($tpl, [
'$baseurl' => $this->getBaseURL(),
'$footerScripts' => $this->footerScripts,
]) . $this->page['footer'];
}
/**
* @brief Removes the base url from an url. This avoids some mixed content problems.
*
* @param string $origURL
*
* @return string The cleaned url
* @throws InternalServerErrorException
*/
public function removeBaseURL($origURL)
{
// Remove the hostname from the url if it is an internal link
$nurl = Util\Strings::normaliseLink($origURL);
$base = Util\Strings::normaliseLink($this->getBaseURL());
$url = str_replace($base . '/', '', $nurl);
// if it is an external link return the orignal value
if ($url == Util\Strings::normaliseLink($origURL)) {
return $origURL;
} else {
return $url;
}
}
/**
* Saves a timestamp for a value - f.e. a call
* Necessary for profiling Friendica
*
* @param int $timestamp the Timestamp
* @param string $value A value to profile
*/
public function saveTimestamp($timestamp, $value)
{
$profiler = $this->config->get('system', 'profiler');
if (!isset($profiler) || !$profiler) {
return;
}
$duration = (float) (microtime(true) - $timestamp);
if (!isset($this->performance[$value])) {
// Prevent ugly E_NOTICE
$this->performance[$value] = 0;
}
$this->performance[$value] += (float) $duration;
$this->performance['marktime'] += (float) $duration;
$callstack = Core\System::callstack();
if (!isset($this->callstack[$value][$callstack])) {
// Prevent ugly E_NOTICE
$this->callstack[$value][$callstack] = 0;
}
$this->callstack[$value][$callstack] += (float) $duration;
}
/**
* Returns the current UserAgent as a String
*
* @return string the UserAgent as a String
* @throws InternalServerErrorException
*/
public function getUserAgent()
{
return
FRIENDICA_PLATFORM . " '" .
FRIENDICA_CODENAME . "' " .
FRIENDICA_VERSION . '-' .
DB_UPDATE_VERSION . '; ' .
$this->getBaseURL();
}
/**
* Checks, if the call is from the Friendica App
*
* Reason:
* The friendica client has problems with the GUID in the notify. this is some workaround
*/
private function checkFriendicaApp()
{
// Friendica-Client
$this->isFriendicaApp = isset($_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)';
}
/**
* Is the call via the Friendica app? (not a "normale" call)
*
* @return bool true if it's from the Friendica app
*/
public function isFriendicaApp()
{
return $this->isFriendicaApp;
}
/**
* @brief Checks if the site is called via a backend process
*
* This isn't a perfect solution. But we need this check very early.
* So we cannot wait until the modules are loaded.
*
* @param string $backend true, if the backend flag was set during App initialization
*
*/
private function checkBackend($backend) {
static $backends = [
'_well_known',
'api',
'dfrn_notify',
'fetch',
'hcard',
'hostxrd',
'nodeinfo',
'noscrape',
'p',
'poco',
'post',
'proxy',
'pubsub',
'pubsubhubbub',
'receive',
'rsd_xml',
'salmon',
'statistics_json',
'xrd',
];
// Check if current module is in backend or backend flag is set
$this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
}
/**
* Returns true, if the call is from a backend node (f.e. from a worker)
*
* @return bool Is it a known backend?
*/
public function isBackend()
{
return $this->isBackend;
}
/**
* @brief Checks if the maximum number of database processes is reached
*
* @return bool Is the limit reached?
*/
public function isMaxProcessesReached()
{
// Deactivated, needs more investigating if this check really makes sense
return false;
/*
* Commented out to suppress static analyzer issues
*
if ($this->is_backend()) {
$process = 'backend';
$max_processes = Core\Config::get('system', 'max_processes_backend');
if (intval($max_processes) == 0) {
$max_processes = 5;
}
} else {
$process = 'frontend';
$max_processes = Core\Config::get('system', 'max_processes_frontend');
if (intval($max_processes) == 0) {
$max_processes = 20;
}
}
$processlist = DBA::processlist();
if ($processlist['list'] != '') {
Core\Logger::log('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], Core\Logger::DEBUG);
if ($processlist['amount'] > $max_processes) {
Core\Logger::log('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', Core\Logger::DEBUG);
return true;
}
}
return false;
*/
}
/**
* @brief Checks if the minimal memory is reached
*
* @return bool Is the memory limit reached?
* @throws InternalServerErrorException
*/
public function isMinMemoryReached()
{
$min_memory = Core\Config::get('system', 'min_memory', 0);
if ($min_memory == 0) {
return false;
}
if (!is_readable('/proc/meminfo')) {
return false;
}
$memdata = explode("\n", file_get_contents('/proc/meminfo'));
$meminfo = [];
foreach ($memdata as $line) {
$data = explode(':', $line);
if (count($data) != 2) {
continue;
}
list($key, $val) = $data;
$meminfo[$key] = (int) trim(str_replace('kB', '', $val));
$meminfo[$key] = (int) ($meminfo[$key] / 1024);
}
if (!isset($meminfo['MemFree'])) {
return false;
}
$free = $meminfo['MemFree'];
$reached = ($free < $min_memory);
if ($reached) {
Core\Logger::log('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, Core\Logger::DEBUG);
}
return $reached;
}
/**
* @brief Checks if the maximum load is reached
*
* @return bool Is the load reached?
* @throws InternalServerErrorException
*/
public function isMaxLoadReached()
{
if ($this->isBackend()) {
$process = 'backend';
$maxsysload = intval(Core\Config::get('system', 'maxloadavg'));
if ($maxsysload < 1) {
$maxsysload = 50;
}
} else {
$process = 'frontend';
$maxsysload = intval(Core\Config::get('system', 'maxloadavg_frontend'));
if ($maxsysload < 1) {
$maxsysload = 50;
}
}
$load = Core\System::currentLoad();
if ($load) {
if (intval($load) > $maxsysload) {
Core\Logger::log('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.');
return true;
}
}
return false;
}
/**
* Executes a child process with 'proc_open'
*
* @param string $command The command to execute
* @param array $args Arguments to pass to the command ( [ 'key' => value, 'key2' => value2, ... ]
* @throws InternalServerErrorException
*/
public function proc_run($command, $args)
{
if (!function_exists('proc_open')) {
return;
}
$cmdline = $this->config->get('config', 'php_path', 'php') . ' ' . escapeshellarg($command);
foreach ($args as $key => $value) {
if (!is_null($value) && is_bool($value) && !$value) {
continue;
}
$cmdline .= ' --' . $key;
if (!is_null($value) && !is_bool($value)) {
$cmdline .= ' ' . $value;
}
}
if ($this->isMinMemoryReached()) {
return;
}
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
$resource = proc_open('cmd /c start /b ' . $cmdline, [], $foo, $this->basePath);
} else {
$resource = proc_open($cmdline . ' &', [], $foo, $this->basePath);
}
if (!is_resource($resource)) {
Core\Logger::log('We got no resource for command ' . $cmdline, Core\Logger::DEBUG);
return;
}
proc_close($resource);
}
/**
* Generates the site's default sender email address
*
* @return string
* @throws InternalServerErrorException
*/
public function getSenderEmailAddress()
{
$sender_email = Core\Config::get('config', 'sender_email');
if (empty($sender_email)) {
$hostname = $this->getHostName();
if (strpos($hostname, ':')) {
$hostname = substr($hostname, 0, strpos($hostname, ':'));
}
$sender_email = 'noreply@' . $hostname;
}
return $sender_email;
}
/**
* Returns the current theme name.
*
* @return string the name of the current theme
* @throws InternalServerErrorException
*/
public function getCurrentTheme()
{
if ($this->getMode()->isInstall()) {
return '';
}
if (!$this->currentTheme) {
$this->computeCurrentTheme();
}
return $this->currentTheme;
}
public function setCurrentTheme($theme)
{
$this->currentTheme = $theme;
}
/**
* Computes the current theme name based on the node settings, the user settings and the device type
*
* @throws Exception
*/
private function computeCurrentTheme()
{
$system_theme = Core\Config::get('system', 'theme');
if (!$system_theme) {
throw new Exception(Core\L10n::t('No system theme config value set.'));
}
// Sane default
$this->currentTheme = $system_theme;
$allowed_themes = explode(',', Core\Config::get('system', 'allowed_themes', $system_theme));
$page_theme = null;
// Find the theme that belongs to the user whose stuff we are looking at
if ($this->profile_uid && ($this->profile_uid != local_user())) {
// Allow folks to override user themes and always use their own on their own site.
// This works only if the user is on the same server
$user = DBA::selectFirst('user', ['theme'], ['uid' => $this->profile_uid]);
if (DBA::isResult($user) && !Core\PConfig::get(local_user(), 'system', 'always_my_theme')) {
$page_theme = $user['theme'];
}
}
$user_theme = Core\Session::get('theme', $system_theme);
// Specific mobile theme override
if (($this->is_mobile || $this->is_tablet) && Core\Session::get('show-mobile', true)) {
$system_mobile_theme = Core\Config::get('system', 'mobile-theme');
$user_mobile_theme = Core\Session::get('mobile-theme', $system_mobile_theme);
// --- means same mobile theme as desktop
if (!empty($user_mobile_theme) && $user_mobile_theme !== '---') {
$user_theme = $user_mobile_theme;
}
}
if ($page_theme) {
$theme_name = $page_theme;
} else {
$theme_name = $user_theme;
}
if ($theme_name
&& in_array($theme_name, $allowed_themes)
&& (file_exists('view/theme/' . $theme_name . '/style.css')
|| file_exists('view/theme/' . $theme_name . '/style.php'))
) {
$this->currentTheme = $theme_name;
}
}
/**
* @brief Return full URL to theme which is currently in effect.
*
* Provide a sane default if nothing is chosen or the specified theme does not exist.
*
* @return string
* @throws InternalServerErrorException
*/
public function getCurrentThemeStylesheetPath()
{
return Core\Theme::getStylesheetPath($this->getCurrentTheme());
}
/**
* Check if request was an AJAX (xmlhttprequest) request.
*
* @return boolean true if it was an AJAX request
*/
public function isAjax()
{
return $this->isAjax;
}
/**
* Returns the value of a argv key
* TODO there are a lot of $a->argv usages in combination with defaults() which can be replaced with this method
*
* @param int $position the position of the argument
* @param mixed $default the default value if not found
*
* @return mixed returns the value of the argument
*/
public function getArgumentValue($position, $default = '')
{
if (array_key_exists($position, $this->argv)) {
return $this->argv[$position];
}
return $default;
}
/**
* 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) || (!Util\Strings::compareLink($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() . '/' . $this->query_string);
exit();
}
Core\Session::init();
Core\Hook::callAll('init_1');
}
// Exclude the backend processes from the session management
if (!$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 {
$this->checkURL();
Core\Update::check($this->basePath, 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.')
]);
}
}
$content = '';
// Initialize module that can set the current theme in the init() method, either directly or via App->profile_uid
if ($this->module_loaded) {
$this->page['page_title'] = $this->module;
$placeholder = '';
Core\Hook::callAll($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']);
}
}
// Load current theme info after module has been initialized as theme could have been set in module
$theme_info_file = 'view/theme/' . $this->getCurrentTheme() . '/theme.php';
if (file_exists($theme_info_file)) {
require_once $theme_info_file;
}
if (function_exists(str_replace('-', '_', $this->getCurrentTheme()) . '_init')) {
$func = str_replace('-', '_', $this->getCurrentTheme()) . '_init';
$func($this);
}
if ($this->module_loaded) {
if (! $this->error && $_SERVER['REQUEST_METHOD'] === 'POST') {
Core\Hook::callAll($this->module . '_mod_post', $_POST);
call_user_func([$this->module_class, 'post']);
}
if (! $this->error) {
Core\Hook::callAll($this->module . '_mod_afterpost', $placeholder);
call_user_func([$this->module_class, 'afterpost']);
}
if (! $this->error) {
$arr = ['content' => $content];
Core\Hook::callAll($this->module . '_mod_content', $arr);
$content = $arr['content'];
$arr = ['content' => call_user_func([$this->module_class, 'content'])];
Core\Hook::callAll($this->module . '_mod_aftercontent', $arr);
$content .= $arr['content'];
}
}
// initialise content region
if ($this->getMode()->isNormal()) {
Core\Hook::callAll('page_content_top', $this->page['content']);
}
$this->page['content'] .= $content;
/* 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\Hook::callAll('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 ($_GET["mode"] == "raw") {
header("Content-type: text/html; charset=utf-8");
echo substr($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 = '', $ssl = false)
{
if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
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 $toUrl The target URL
* @throws InternalServerErrorException
*/
public function redirect($toUrl)
{
if (!empty(parse_url($toUrl, PHP_URL_SCHEME))) {
Core\System::externalRedirect($toUrl);
} else {
$this->internalRedirect($toUrl);
}
}
}