diff --git a/src/App.php b/src/App.php index 674a99e05..15538e88d 100644 --- a/src/App.php +++ b/src/App.php @@ -1,980 +1,980 @@ - '', - 'videowidth' => 425, - 'videoheight' => 350, - 'force_max_items' => 0, - 'thread_allow' => true, - 'stylesheet' => '', - 'template_engine' => 'smarty3', - ); - - /** - * @brief An array of registered template engines ('name'=>'class name') - */ - public $template_engines = array(); - - /** - * @brief An array of instanced template engines ('name'=>'instance') - */ - public $template_engine_instance = array(); - public $process_id; - private $ldelim = array( - 'internal' => '', - 'smarty3' => '{{' - ); - private $rdelim = array( - 'internal' => '', - 'smarty3' => '}}' - ); - private $scheme; - private $hostname; - private $db; - private $curl_code; - private $curl_content_type; - private $curl_headers; - private $cached_profile_image; - private $cached_profile_picdate; - private static $a; - - /** - * @brief App constructor. - * - * @param string $basepath Path to the app base folder - */ - function __construct($basepath) { - - global $default_timezone; - - $hostname = ''; - - if (file_exists('.htpreconfig.php')) { - include '.htpreconfig.php'; - } - - $this->timezone = ((x($default_timezone)) ? $default_timezone : 'UTC'); - - date_default_timezone_set($this->timezone); - - $this->performance['start'] = microtime(true); - $this->performance['database'] = 0; - $this->performance['database_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'] = array(); - $this->callstack['database_write'] = array(); - $this->callstack['network'] = array(); - $this->callstack['file'] = array(); - $this->callstack['rendering'] = array(); - $this->callstack['parser'] = array(); - - $this->config = array(); - $this->page = array(); - $this->pager = array(); - - $this->query_string = ''; - - $this->process_id = uniqid('log', true); - - startup(); - - $this->scheme = 'http'; - - if ((x($_SERVER, 'HTTPS') && $_SERVER['HTTPS']) || - (x($_SERVER, 'HTTP_FORWARDED') && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED'])) || - (x($_SERVER, 'HTTP_X_FORWARDED_PROTO') && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') || - (x($_SERVER, 'HTTP_X_FORWARDED_SSL') && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on') || - (x($_SERVER, 'FRONT_END_HTTPS') && $_SERVER['FRONT_END_HTTPS'] == 'on') || - (x($_SERVER, 'SERVER_PORT') && (intval($_SERVER['SERVER_PORT']) == 443)) // XXX: reasonable assumption, but isn't this hardcoding too much? - ) { - $this->scheme = 'https'; - } - - if (x($_SERVER, 'SERVER_NAME')) { - $this->hostname = $_SERVER['SERVER_NAME']; - - if (x($_SERVER, 'SERVER_PORT') && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) { - $this->hostname .= ':' . $_SERVER['SERVER_PORT']; - } - /* - * Figure out if we are running at the top of a domain - * or in a sub-directory and adjust accordingly - */ - - /// @TODO This kind of escaping breaks syntax-highlightning on CoolEdit (Midnight Commander) - $path = trim(dirname($_SERVER['SCRIPT_NAME']), '/\\'); - if (isset($path) && strlen($path) && ($path != $this->path)) { - $this->path = $path; - } - } - - if ($hostname != '') { - $this->hostname = $hostname; - } - - if (! static::directory_usable($basepath)) { - throw new \Exception('Basepath ' . $basepath . ' isn\'t usable.'); - } - - $this->basepath = rtrim($basepath, DIRECTORY_SEPARATOR); - - set_include_path( - get_include_path() . PATH_SEPARATOR - . $this->basepath . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR - . $this->basepath . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR - . $this->basepath . DIRECTORY_SEPARATOR . 'library/langdet' . PATH_SEPARATOR - . $this->basepath); - - - if (is_array($_SERVER['argv']) && $_SERVER['argc'] > 1 && substr(end($_SERVER['argv']), 0, 4) == 'http') { - $this->set_baseurl(array_pop($_SERVER['argv'])); - $_SERVER['argc'] --; - } - - if ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 9) === 'pagename=') { - $this->query_string = substr($_SERVER['QUERY_STRING'], 9); - - // removing trailing / - maybe a nginx problem - $this->query_string = ltrim($this->query_string, '/'); - } elseif ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 2) === 'q=') { - $this->query_string = substr($_SERVER['QUERY_STRING'], 2); - - // removing trailing / - maybe a nginx problem - $this->query_string = ltrim($this->query_string, '/'); - } - - if (x($_GET, 'pagename')) { - $this->cmd = trim($_GET['pagename'], '/\\'); - } elseif (x($_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 = array('home'); - $this->module = 'home'; - } - - // See if there is any page number information, and initialise pagination - $this->pager['page'] = ((x($_GET, 'page') && intval($_GET['page']) > 0) ? intval($_GET['page']) : 1); - $this->pager['itemspage'] = 50; - $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage']; - - if ($this->pager['start'] < 0) { - $this->pager['start'] = 0; - } - $this->pager['total'] = 0; - - // Detect mobile devices - $mobile_detect = new \Mobile_Detect(); - $this->is_mobile = $mobile_detect->isMobile(); - $this->is_tablet = $mobile_detect->isTablet(); - - // Friendica-Client - $this->is_friendica_app = ($_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)'); - - // Register template engines - $dc = get_declared_classes(); - foreach ($dc as $k) { - if (in_array('ITemplateEngine', class_implements($k))) { - $this->register_template_engine($k); - } - } - - self::$a = $this; - } - - /** - * @brief Returns the base filesystem path of the App - * - * It first checks for the internal variable, then for DOCUMENT_ROOT and - * finally for PWD - * - * @return string - */ - public static function get_basepath() { - if (isset($this)) { - $basepath = $this->basepath; - } - - if (! $basepath) { - $basepath = Config::get('system', 'basepath'); - } - - if (! $basepath && x($_SERVER, 'DOCUMENT_ROOT')) { - $basepath = $_SERVER['DOCUMENT_ROOT']; - } - - if (! $basepath && x($_SERVER, 'PWD')) { - $basepath = $_SERVER['PWD']; - } - - return $basepath; - } - - function get_scheme() { - 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 $ssl Whether to append http or https under SSL_POLICY_SELFSIGN - * @return string Friendica server base URL - */ - function get_baseurl($ssl = false) { - // Is the function called statically? - if (!(isset($this) && get_class($this) == __CLASS__)) { - return self::$a->get_baseurl($ssl); - } - - $scheme = $this->scheme; - - if (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) { - $scheme = 'https'; - } - - // Basically, we have $ssl = true on any links which can only be seen by a logged in user - // (and also the login link). Anything seen by an outsider will have it turned off. - - if (Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) { - if ($ssl) { - $scheme = 'https'; - } else { - $scheme = 'http'; - } - } - - if (Config::get('config', 'hostname') != '') { - $this->hostname = Config::get('config', 'hostname'); - } - - return $scheme . '://' . $this->hostname . ((isset($this->path) && strlen($this->path)) ? '/' . $this->path : '' ); - } - - /** - * @brief Initializes the baseurl components - * - * Clears the baseurl cache to prevent inconstistencies - * - * @param string $url - */ - function set_baseurl($url) { - $parsed = @parse_url($url); - - if ($parsed) { - $this->scheme = $parsed['scheme']; - - $hostname = $parsed['host']; - if (x($parsed, 'port')) { - $hostname .= ':' . $parsed['port']; - } - if (x($parsed, 'path')) { - $this->path = trim($parsed['path'], '\\/'); - } - - if (file_exists('.htpreconfig.php')) { - include '.htpreconfig.php'; - } - - if (Config::get('config', 'hostname') != '') { - $this->hostname = Config::get('config', 'hostname'); - } - - if (!isset($this->hostname) OR ( $this->hostname == '')) { - $this->hostname = $hostname; - } - } - } - - function get_hostname() { - if (Config::get('config', 'hostname') != '') { - $this->hostname = Config::get('config', 'hostname'); - } - - return $this->hostname; - } - - function set_hostname($h) { - $this->hostname = $h; - } - - function set_path($p) { - $this->path = trim(trim($p), '/'); - } - - function get_path() { - return $this->path; - } - - function set_pager_total($n) { - $this->pager['total'] = intval($n); - } - - function set_pager_itemspage($n) { - $this->pager['itemspage'] = ((intval($n) > 0) ? intval($n) : 0); - $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage']; - } - - function set_pager_page($n) { - $this->pager['page'] = $n; - $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage']; - } - - function init_pagehead() { - $interval = ((local_user()) ? PConfig::get(local_user(), 'system', 'update_interval') : 40000); - - // If the update is 'deactivated' set it to the highest integer number (~24 days) - if ($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['sitename'] . ' (' . $this->module . ')'; - } else { - $this->page['title'] = $this->config['sitename']; - } - - /* put the head template at the beginning of page['htmlhead'] - * since the code added by the modules frequently depends on it - * being first - */ - if (!isset($this->page['htmlhead'])) { - $this->page['htmlhead'] = ''; - } - - // If we're using Smarty, then doing replace_macros() will replace - // any unrecognized variables with a blank string. Since we delay - // replacing $stylesheet until later, we need to replace it now - // with another variable name - if ($this->theme['template_engine'] === 'smarty3') { - $stylesheet = $this->get_template_ldelim('smarty3') . '$stylesheet' . $this->get_template_rdelim('smarty3'); - } else { - $stylesheet = '$stylesheet'; - } - - $shortcut_icon = Config::get('system', 'shortcut_icon'); - if ($shortcut_icon == '') { - $shortcut_icon = 'images/friendica-32.png'; - } - - $touch_icon = Config::get('system', 'touch_icon'); - if ($touch_icon == '') { - $touch_icon = 'images/friendica-128.png'; - } - - // get data wich is needed for infinite scroll on the network page - $invinite_scroll = infinite_scroll_data($this->module); - - $tpl = get_markup_template('head.tpl'); - $this->page['htmlhead'] = replace_macros($tpl, array( - '$baseurl' => $this->get_baseurl(), // FIXME for z_path!!!! - '$local_user' => local_user(), - '$generator' => 'Friendica' . ' ' . FRIENDICA_VERSION, - '$delitem' => t('Delete this item?'), - '$showmore' => t('show more'), - '$showfewer' => t('show fewer'), - '$update_interval' => $interval, - '$shortcut_icon' => $shortcut_icon, - '$touch_icon' => $touch_icon, - '$stylesheet' => $stylesheet, - '$infinite_scroll' => $invinite_scroll, - )) . $this->page['htmlhead']; - } - - function init_page_end() { - if (!isset($this->page['end'])) { - $this->page['end'] = ''; - } - $tpl = get_markup_template('end.tpl'); - $this->page['end'] = replace_macros($tpl, array( - '$baseurl' => $this->get_baseurl() // FIXME for z_path!!!! - )) . $this->page['end']; - } - - function set_curl_code($code) { - $this->curl_code = $code; - } - - function get_curl_code() { - return $this->curl_code; - } - - function set_curl_content_type($content_type) { - $this->curl_content_type = $content_type; - } - - function get_curl_content_type() { - return $this->curl_content_type; - } - - function set_curl_headers($headers) { - $this->curl_headers = $headers; - } - - function get_curl_headers() { - return $this->curl_headers; - } - - function get_cached_avatar_image($avatar_image) { - return $avatar_image; - } - - /** - * @brief Removes the baseurl from an url. This avoids some mixed content problems. - * - * @param string $orig_url - * - * @return string The cleaned url - */ - function remove_baseurl($orig_url) { - - // Is the function called statically? - if (!(isset($this) && get_class($this) == __CLASS__)) { - return self::$a->remove_baseurl($orig_url); - } - - // Remove the hostname from the url if it is an internal link - $nurl = normalise_link($orig_url); - $base = normalise_link($this->get_baseurl()); - $url = str_replace($base . '/', '', $nurl); - - // if it is an external link return the orignal value - if ($url == normalise_link($orig_url)) { - return $orig_url; - } else { - return $url; - } - } - - /** - * @brief Register template engine class - * - * If $name is '', is used class static property $class::$name - * - * @param string $class - * @param string $name - */ - function register_template_engine($class, $name = '') { - /// @TODO Really === and not just == ? - if ($name === '') { - $v = get_class_vars($class); - if (x($v, 'name')) - $name = $v['name']; - } - if ($name === '') { - echo "template engine $class cannot be registered without a name.\n"; - killme(); - } - $this->template_engines[$name] = $class; - } - - /** - * @brief Return template engine instance. - * - * If $name is not defined, return engine defined by theme, - * or default - * - * @param strin $name Template engine name - * @return object Template Engine instance - */ - function template_engine($name = '') { - /// @TODO really type-check included? - if ($name !== '') { - $template_engine = $name; - } else { - $template_engine = 'smarty3'; - if (x($this->theme, 'template_engine')) { - $template_engine = $this->theme['template_engine']; - } - } - - if (isset($this->template_engines[$template_engine])) { - if (isset($this->template_engine_instance[$template_engine])) { - return $this->template_engine_instance[$template_engine]; - } else { - $class = $this->template_engines[$template_engine]; - $obj = new $class; - $this->template_engine_instance[$template_engine] = $obj; - return $obj; - } - } - - echo "template engine $template_engine is not registered!\n"; - killme(); - } - - /** - * @brief Returns the active template engine. - * - * @return string - */ - function get_template_engine() { - return $this->theme['template_engine']; - } - - function set_template_engine($engine = 'smarty3') { - $this->theme['template_engine'] = $engine; - } - - function get_template_ldelim($engine = 'smarty3') { - return $this->ldelim[$engine]; - } - - function get_template_rdelim($engine = 'smarty3') { - return $this->rdelim[$engine]; - } - - function save_timestamp($stamp, $value) { - if (!isset($this->config['system']['profiler']) || !$this->config['system']['profiler']) { - return; - } - - $duration = (float) (microtime(true) - $stamp); - - if (!isset($this->performance[$value])) { - // Prevent ugly E_NOTICE - $this->performance[$value] = 0; - } - - $this->performance[$value] += (float) $duration; - $this->performance['marktime'] += (float) $duration; - - $callstack = $this->callstack(); - - if (!isset($this->callstack[$value][$callstack])) { - // Prevent ugly E_NOTICE - $this->callstack[$value][$callstack] = 0; - } - - $this->callstack[$value][$callstack] += (float) $duration; - } - - /** - * @brief Log active processes into the "process" table - */ - function start_process() { - $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1); - - $command = basename($trace[0]['file']); - - $this->remove_inactive_processes(); - - q('START TRANSACTION'); - - $r = q('SELECT `pid` FROM `process` WHERE `pid` = %d', intval(getmypid())); - if (!\dbm::is_result($r)) { - q("INSERT INTO `process` (`pid`,`command`,`created`) VALUES (%d, '%s', '%s')", intval(getmypid()), dbesc($command), dbesc(datetime_convert())); - } - q('COMMIT'); - } - - /** - * @brief Remove inactive processes - */ - function remove_inactive_processes() { - q('START TRANSACTION'); - - $r = q('SELECT `pid` FROM `process`'); - if (\dbm::is_result($r)) { - foreach ($r AS $process) { - if (!posix_kill($process['pid'], 0)) { - q('DELETE FROM `process` WHERE `pid` = %d', intval($process['pid'])); - } - } - } - q('COMMIT'); - } - - /** - * @brief Remove the active process from the "process" table - */ - function end_process() { - q('DELETE FROM `process` WHERE `pid` = %d', intval(getmypid())); - } - - /** - * @brief Returns a string with a callstack. Can be used for logging. - * - * @return string - */ - function callstack() { - $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 6); - - // We remove the first two items from the list since they contain data that we don't need. - array_shift($trace); - array_shift($trace); - - $callstack = array(); - foreach ($trace AS $func) { - $callstack[] = $func['function']; - } - - return implode(', ', $callstack); - } - - function get_useragent() { - return - FRIENDICA_PLATFORM . " '" . - FRIENDICA_CODENAME . "' " . - FRIENDICA_VERSION . '-' . - DB_UPDATE_VERSION . '; ' . - $this->get_baseurl(); - } - - function is_friendica_app() { - return $this->is_friendica_app; - } - - /** - * @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. - * - * @return bool Is it a known backend? - */ - function is_backend() { - static $backends = array(); - $backends[] = '_well_known'; - $backends[] = 'api'; - $backends[] = 'dfrn_notify'; - $backends[] = 'fetch'; - $backends[] = 'hcard'; - $backends[] = 'hostxrd'; - $backends[] = 'nodeinfo'; - $backends[] = 'noscrape'; - $backends[] = 'p'; - $backends[] = 'poco'; - $backends[] = 'post'; - $backends[] = 'proxy'; - $backends[] = 'pubsub'; - $backends[] = 'pubsubhubbub'; - $backends[] = 'receive'; - $backends[] = 'rsd_xml'; - $backends[] = 'salmon'; - $backends[] = 'statistics_json'; - $backends[] = 'xrd'; - - // Check if current module is in backend or backend flag is set - return (in_array($this->module, $backends) || $this->backend); - } - - /** - * @brief Checks if the maximum number of database processes is reached - * - * @return bool Is the limit reached? - */ - function max_processes_reached() { - - if ($this->is_backend()) { - $process = 'backend'; - $max_processes = Config::get('system', 'max_processes_backend'); - if (intval($max_processes) == 0) { - $max_processes = 5; - } - } else { - $process = 'frontend'; - $max_processes = Config::get('system', 'max_processes_frontend'); - if (intval($max_processes) == 0) { - $max_processes = 20; - } - } - - $processlist = \dbm::processlist(); - if ($processlist['list'] != '') { - logger('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], LOGGER_DEBUG); - - if ($processlist['amount'] > $max_processes) { - logger('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', LOGGER_DEBUG); - return true; - } - } - return false; - } - - /** - * @brief Checks if the minimal memory is reached - * - * @return bool Is the memory limit reached? - */ - public function min_memory_reached() { - $min_memory = Config::get('system', 'min_memory', 0); - if ($min_memory == 0) { - return false; - } - - if (!is_readable('/proc/meminfo')) { - return false; - } - - $memdata = explode("\n", file_get_contents('/proc/meminfo')); - - $meminfo = array(); - foreach ($memdata as $line) { - list($key, $val) = explode(':', $line); - $meminfo[$key] = (int) trim(str_replace('kB', '', $val)); - $meminfo[$key] = (int) ($meminfo[$key] / 1024); - } - - if (!isset($meminfo['MemAvailable']) OR ! isset($meminfo['MemFree'])) { - return false; - } - - $free = $meminfo['MemAvailable'] + $meminfo['MemFree']; - - $reached = ($free < $min_memory); - - if ($reached) { - logger('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, LOGGER_DEBUG); - } - - return $reached; - } - - /** - * @brief Checks if the maximum load is reached - * - * @return bool Is the load reached? - */ - function maxload_reached() { - - if ($this->is_backend()) { - $process = 'backend'; - $maxsysload = intval(Config::get('system', 'maxloadavg')); - if ($maxsysload < 1) { - $maxsysload = 50; - } - } else { - $process = 'frontend'; - $maxsysload = intval(Config::get('system', 'maxloadavg_frontend')); - if ($maxsysload < 1) { - $maxsysload = 50; - } - } - - $load = current_load(); - if ($load) { - if (intval($load) > $maxsysload) { - logger('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.'); - return true; - } - } - return false; - } - - function proc_run($args) { - - if (!function_exists('proc_open')) { - return; - } - - // If the last worker fork was less than 10 seconds before then don't fork another one. - // This should prevent the forking of masses of workers. - $cachekey = 'app:proc_run:started'; - $result = \Cache::get($cachekey); - - if (!is_null($result) AND ( time() - $result) < 10) { - return; - } - - // Set the timestamp of the last proc_run - \Cache::set($cachekey, time(), CACHE_MINUTE); - - array_unshift($args, ((x($this->config, 'php_path')) && (strlen($this->config['php_path'])) ? $this->config['php_path'] : 'php')); - - // add baseurl to args. cli scripts can't construct it - $args[] = $this->get_baseurl(); - - for ($x = 0; $x < count($args); $x ++) { - $args[$x] = escapeshellarg($args[$x]); - } - - $cmdline = implode($args, ' '); - - if ($this->min_memory_reached()) { - return; - } - - if (Config::get('system', 'proc_windows')) { - $resource = proc_open('cmd /c start /b ' . $cmdline, array(), $foo, $this->get_basepath()); - } else { - $resource = proc_open($cmdline . ' &', array(), $foo, $this->get_basepath()); - } - if (!is_resource($resource)) { - logger('We got no resource for command ' . $cmdline, LOGGER_DEBUG); - return; - } - proc_close($resource); - } - - /** - * @brief Returns the system user that is executing the script - * - * This mostly returns something like "www-data". - * - * @return string system username - */ - static function systemuser() { - if (!function_exists('posix_getpwuid') OR ! function_exists('posix_geteuid')) { - return ''; - } - - $processUser = posix_getpwuid(posix_geteuid()); - return $processUser['name']; - } - - /** - * @brief Checks if a given directory is usable for the system - * - * @return boolean the directory is usable - */ - static function directory_usable($directory) { - if ($directory == '') { - logger('Directory is empty. This shouldn\'t happen.', LOGGER_DEBUG); - return false; - } - - if (!file_exists($directory)) { - logger('Path "' . $directory . '" does not exist for user ' . self::systemuser(), LOGGER_DEBUG); - return false; - } - if (is_file($directory)) { - logger('Path "' . $directory . '" is a file for user ' . self::systemuser(), LOGGER_DEBUG); - return false; - } - if (!is_dir($directory)) { - logger('Path "' . $directory . '" is not a directory for user ' . self::systemuser(), LOGGER_DEBUG); - return false; - } - if (!is_writable($directory)) { - logger('Path "' . $directory . '" is not writable for user ' . self::systemuser(), LOGGER_DEBUG); - return false; - } - return true; - } -} + '', + 'videowidth' => 425, + 'videoheight' => 350, + 'force_max_items' => 0, + 'thread_allow' => true, + 'stylesheet' => '', + 'template_engine' => 'smarty3', + ); + + /** + * @brief An array of registered template engines ('name'=>'class name') + */ + public $template_engines = array(); + + /** + * @brief An array of instanced template engines ('name'=>'instance') + */ + public $template_engine_instance = array(); + public $process_id; + private $ldelim = array( + 'internal' => '', + 'smarty3' => '{{' + ); + private $rdelim = array( + 'internal' => '', + 'smarty3' => '}}' + ); + private $scheme; + private $hostname; + private $db; + private $curl_code; + private $curl_content_type; + private $curl_headers; + private $cached_profile_image; + private $cached_profile_picdate; + private static $a; + + /** + * @brief App constructor. + * + * @param string $basepath Path to the app base folder + */ + function __construct($basepath) { + + global $default_timezone; + + $hostname = ''; + + if (file_exists('.htpreconfig.php')) { + include '.htpreconfig.php'; + } + + $this->timezone = ((x($default_timezone)) ? $default_timezone : 'UTC'); + + date_default_timezone_set($this->timezone); + + $this->performance['start'] = microtime(true); + $this->performance['database'] = 0; + $this->performance['database_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'] = array(); + $this->callstack['database_write'] = array(); + $this->callstack['network'] = array(); + $this->callstack['file'] = array(); + $this->callstack['rendering'] = array(); + $this->callstack['parser'] = array(); + + $this->config = array(); + $this->page = array(); + $this->pager = array(); + + $this->query_string = ''; + + $this->process_id = uniqid('log', true); + + startup(); + + $this->scheme = 'http'; + + if ((x($_SERVER, 'HTTPS') && $_SERVER['HTTPS']) || + (x($_SERVER, 'HTTP_FORWARDED') && preg_match('/proto=https/', $_SERVER['HTTP_FORWARDED'])) || + (x($_SERVER, 'HTTP_X_FORWARDED_PROTO') && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') || + (x($_SERVER, 'HTTP_X_FORWARDED_SSL') && $_SERVER['HTTP_X_FORWARDED_SSL'] == 'on') || + (x($_SERVER, 'FRONT_END_HTTPS') && $_SERVER['FRONT_END_HTTPS'] == 'on') || + (x($_SERVER, 'SERVER_PORT') && (intval($_SERVER['SERVER_PORT']) == 443)) // XXX: reasonable assumption, but isn't this hardcoding too much? + ) { + $this->scheme = 'https'; + } + + if (x($_SERVER, 'SERVER_NAME')) { + $this->hostname = $_SERVER['SERVER_NAME']; + + if (x($_SERVER, 'SERVER_PORT') && $_SERVER['SERVER_PORT'] != 80 && $_SERVER['SERVER_PORT'] != 443) { + $this->hostname .= ':' . $_SERVER['SERVER_PORT']; + } + /* + * Figure out if we are running at the top of a domain + * or in a sub-directory and adjust accordingly + */ + + /// @TODO This kind of escaping breaks syntax-highlightning on CoolEdit (Midnight Commander) + $path = trim(dirname($_SERVER['SCRIPT_NAME']), '/\\'); + if (isset($path) && strlen($path) && ($path != $this->path)) { + $this->path = $path; + } + } + + if ($hostname != '') { + $this->hostname = $hostname; + } + + if (! static::directory_usable($basepath, false)) { + throw new \Exception('Basepath ' . $basepath . ' isn\'t usable.'); + } + + $this->basepath = rtrim($basepath, DIRECTORY_SEPARATOR); + + set_include_path( + get_include_path() . PATH_SEPARATOR + . $this->basepath . DIRECTORY_SEPARATOR . 'include' . PATH_SEPARATOR + . $this->basepath . DIRECTORY_SEPARATOR . 'library' . PATH_SEPARATOR + . $this->basepath . DIRECTORY_SEPARATOR . 'library/langdet' . PATH_SEPARATOR + . $this->basepath); + + + if (is_array($_SERVER['argv']) && $_SERVER['argc'] > 1 && substr(end($_SERVER['argv']), 0, 4) == 'http') { + $this->set_baseurl(array_pop($_SERVER['argv'])); + $_SERVER['argc'] --; + } + + if ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 9) === 'pagename=') { + $this->query_string = substr($_SERVER['QUERY_STRING'], 9); + + // removing trailing / - maybe a nginx problem + $this->query_string = ltrim($this->query_string, '/'); + } elseif ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 2) === 'q=') { + $this->query_string = substr($_SERVER['QUERY_STRING'], 2); + + // removing trailing / - maybe a nginx problem + $this->query_string = ltrim($this->query_string, '/'); + } + + if (x($_GET, 'pagename')) { + $this->cmd = trim($_GET['pagename'], '/\\'); + } elseif (x($_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 = array('home'); + $this->module = 'home'; + } + + // See if there is any page number information, and initialise pagination + $this->pager['page'] = ((x($_GET, 'page') && intval($_GET['page']) > 0) ? intval($_GET['page']) : 1); + $this->pager['itemspage'] = 50; + $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage']; + + if ($this->pager['start'] < 0) { + $this->pager['start'] = 0; + } + $this->pager['total'] = 0; + + // Detect mobile devices + $mobile_detect = new \Mobile_Detect(); + $this->is_mobile = $mobile_detect->isMobile(); + $this->is_tablet = $mobile_detect->isTablet(); + + // Friendica-Client + $this->is_friendica_app = ($_SERVER['HTTP_USER_AGENT'] == 'Apache-HttpClient/UNAVAILABLE (java 1.4)'); + + // Register template engines + $dc = get_declared_classes(); + foreach ($dc as $k) { + if (in_array('ITemplateEngine', class_implements($k))) { + $this->register_template_engine($k); + } + } + + self::$a = $this; + } + + /** + * @brief Returns the base filesystem path of the App + * + * It first checks for the internal variable, then for DOCUMENT_ROOT and + * finally for PWD + * + * @return string + */ + public static function get_basepath() { + if (isset($this)) { + $basepath = $this->basepath; + } + + if (! $basepath) { + $basepath = Config::get('system', 'basepath'); + } + + if (! $basepath && x($_SERVER, 'DOCUMENT_ROOT')) { + $basepath = $_SERVER['DOCUMENT_ROOT']; + } + + if (! $basepath && x($_SERVER, 'PWD')) { + $basepath = $_SERVER['PWD']; + } + + return $basepath; + } + + function get_scheme() { + 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 $ssl Whether to append http or https under SSL_POLICY_SELFSIGN + * @return string Friendica server base URL + */ + function get_baseurl($ssl = false) { + // Is the function called statically? + if (!(isset($this) && get_class($this) == __CLASS__)) { + return self::$a->get_baseurl($ssl); + } + + $scheme = $this->scheme; + + if (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) { + $scheme = 'https'; + } + + // Basically, we have $ssl = true on any links which can only be seen by a logged in user + // (and also the login link). Anything seen by an outsider will have it turned off. + + if (Config::get('system', 'ssl_policy') == SSL_POLICY_SELFSIGN) { + if ($ssl) { + $scheme = 'https'; + } else { + $scheme = 'http'; + } + } + + if (Config::get('config', 'hostname') != '') { + $this->hostname = Config::get('config', 'hostname'); + } + + return $scheme . '://' . $this->hostname . ((isset($this->path) && strlen($this->path)) ? '/' . $this->path : '' ); + } + + /** + * @brief Initializes the baseurl components + * + * Clears the baseurl cache to prevent inconstistencies + * + * @param string $url + */ + function set_baseurl($url) { + $parsed = @parse_url($url); + + if ($parsed) { + $this->scheme = $parsed['scheme']; + + $hostname = $parsed['host']; + if (x($parsed, 'port')) { + $hostname .= ':' . $parsed['port']; + } + if (x($parsed, 'path')) { + $this->path = trim($parsed['path'], '\\/'); + } + + if (file_exists('.htpreconfig.php')) { + include '.htpreconfig.php'; + } + + if (Config::get('config', 'hostname') != '') { + $this->hostname = Config::get('config', 'hostname'); + } + + if (!isset($this->hostname) OR ( $this->hostname == '')) { + $this->hostname = $hostname; + } + } + } + + function get_hostname() { + if (Config::get('config', 'hostname') != '') { + $this->hostname = Config::get('config', 'hostname'); + } + + return $this->hostname; + } + + function set_hostname($h) { + $this->hostname = $h; + } + + function set_path($p) { + $this->path = trim(trim($p), '/'); + } + + function get_path() { + return $this->path; + } + + function set_pager_total($n) { + $this->pager['total'] = intval($n); + } + + function set_pager_itemspage($n) { + $this->pager['itemspage'] = ((intval($n) > 0) ? intval($n) : 0); + $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage']; + } + + function set_pager_page($n) { + $this->pager['page'] = $n; + $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage']; + } + + function init_pagehead() { + $interval = ((local_user()) ? PConfig::get(local_user(), 'system', 'update_interval') : 40000); + + // If the update is 'deactivated' set it to the highest integer number (~24 days) + if ($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['sitename'] . ' (' . $this->module . ')'; + } else { + $this->page['title'] = $this->config['sitename']; + } + + /* put the head template at the beginning of page['htmlhead'] + * since the code added by the modules frequently depends on it + * being first + */ + if (!isset($this->page['htmlhead'])) { + $this->page['htmlhead'] = ''; + } + + // If we're using Smarty, then doing replace_macros() will replace + // any unrecognized variables with a blank string. Since we delay + // replacing $stylesheet until later, we need to replace it now + // with another variable name + if ($this->theme['template_engine'] === 'smarty3') { + $stylesheet = $this->get_template_ldelim('smarty3') . '$stylesheet' . $this->get_template_rdelim('smarty3'); + } else { + $stylesheet = '$stylesheet'; + } + + $shortcut_icon = Config::get('system', 'shortcut_icon'); + if ($shortcut_icon == '') { + $shortcut_icon = 'images/friendica-32.png'; + } + + $touch_icon = Config::get('system', 'touch_icon'); + if ($touch_icon == '') { + $touch_icon = 'images/friendica-128.png'; + } + + // get data wich is needed for infinite scroll on the network page + $invinite_scroll = infinite_scroll_data($this->module); + + $tpl = get_markup_template('head.tpl'); + $this->page['htmlhead'] = replace_macros($tpl, array( + '$baseurl' => $this->get_baseurl(), // FIXME for z_path!!!! + '$local_user' => local_user(), + '$generator' => 'Friendica' . ' ' . FRIENDICA_VERSION, + '$delitem' => t('Delete this item?'), + '$showmore' => t('show more'), + '$showfewer' => t('show fewer'), + '$update_interval' => $interval, + '$shortcut_icon' => $shortcut_icon, + '$touch_icon' => $touch_icon, + '$stylesheet' => $stylesheet, + '$infinite_scroll' => $invinite_scroll, + )) . $this->page['htmlhead']; + } + + function init_page_end() { + if (!isset($this->page['end'])) { + $this->page['end'] = ''; + } + $tpl = get_markup_template('end.tpl'); + $this->page['end'] = replace_macros($tpl, array( + '$baseurl' => $this->get_baseurl() // FIXME for z_path!!!! + )) . $this->page['end']; + } + + function set_curl_code($code) { + $this->curl_code = $code; + } + + function get_curl_code() { + return $this->curl_code; + } + + function set_curl_content_type($content_type) { + $this->curl_content_type = $content_type; + } + + function get_curl_content_type() { + return $this->curl_content_type; + } + + function set_curl_headers($headers) { + $this->curl_headers = $headers; + } + + function get_curl_headers() { + return $this->curl_headers; + } + + function get_cached_avatar_image($avatar_image) { + return $avatar_image; + } + + /** + * @brief Removes the baseurl from an url. This avoids some mixed content problems. + * + * @param string $orig_url + * + * @return string The cleaned url + */ + function remove_baseurl($orig_url) { + + // Is the function called statically? + if (!(isset($this) && get_class($this) == __CLASS__)) { + return self::$a->remove_baseurl($orig_url); + } + + // Remove the hostname from the url if it is an internal link + $nurl = normalise_link($orig_url); + $base = normalise_link($this->get_baseurl()); + $url = str_replace($base . '/', '', $nurl); + + // if it is an external link return the orignal value + if ($url == normalise_link($orig_url)) { + return $orig_url; + } else { + return $url; + } + } + + /** + * @brief Register template engine class + * + * If $name is '', is used class static property $class::$name + * + * @param string $class + * @param string $name + */ + function register_template_engine($class, $name = '') { + /// @TODO Really === and not just == ? + if ($name === '') { + $v = get_class_vars($class); + if (x($v, 'name')) + $name = $v['name']; + } + if ($name === '') { + echo "template engine $class cannot be registered without a name.\n"; + killme(); + } + $this->template_engines[$name] = $class; + } + + /** + * @brief Return template engine instance. + * + * If $name is not defined, return engine defined by theme, + * or default + * + * @param strin $name Template engine name + * @return object Template Engine instance + */ + function template_engine($name = '') { + /// @TODO really type-check included? + if ($name !== '') { + $template_engine = $name; + } else { + $template_engine = 'smarty3'; + if (x($this->theme, 'template_engine')) { + $template_engine = $this->theme['template_engine']; + } + } + + if (isset($this->template_engines[$template_engine])) { + if (isset($this->template_engine_instance[$template_engine])) { + return $this->template_engine_instance[$template_engine]; + } else { + $class = $this->template_engines[$template_engine]; + $obj = new $class; + $this->template_engine_instance[$template_engine] = $obj; + return $obj; + } + } + + echo "template engine $template_engine is not registered!\n"; + killme(); + } + + /** + * @brief Returns the active template engine. + * + * @return string + */ + function get_template_engine() { + return $this->theme['template_engine']; + } + + function set_template_engine($engine = 'smarty3') { + $this->theme['template_engine'] = $engine; + } + + function get_template_ldelim($engine = 'smarty3') { + return $this->ldelim[$engine]; + } + + function get_template_rdelim($engine = 'smarty3') { + return $this->rdelim[$engine]; + } + + function save_timestamp($stamp, $value) { + if (!isset($this->config['system']['profiler']) || !$this->config['system']['profiler']) { + return; + } + + $duration = (float) (microtime(true) - $stamp); + + if (!isset($this->performance[$value])) { + // Prevent ugly E_NOTICE + $this->performance[$value] = 0; + } + + $this->performance[$value] += (float) $duration; + $this->performance['marktime'] += (float) $duration; + + $callstack = $this->callstack(); + + if (!isset($this->callstack[$value][$callstack])) { + // Prevent ugly E_NOTICE + $this->callstack[$value][$callstack] = 0; + } + + $this->callstack[$value][$callstack] += (float) $duration; + } + + /** + * @brief Log active processes into the "process" table + */ + function start_process() { + $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1); + + $command = basename($trace[0]['file']); + + $this->remove_inactive_processes(); + + q('START TRANSACTION'); + + $r = q('SELECT `pid` FROM `process` WHERE `pid` = %d', intval(getmypid())); + if (!\dbm::is_result($r)) { + q("INSERT INTO `process` (`pid`,`command`,`created`) VALUES (%d, '%s', '%s')", intval(getmypid()), dbesc($command), dbesc(datetime_convert())); + } + q('COMMIT'); + } + + /** + * @brief Remove inactive processes + */ + function remove_inactive_processes() { + q('START TRANSACTION'); + + $r = q('SELECT `pid` FROM `process`'); + if (\dbm::is_result($r)) { + foreach ($r AS $process) { + if (!posix_kill($process['pid'], 0)) { + q('DELETE FROM `process` WHERE `pid` = %d', intval($process['pid'])); + } + } + } + q('COMMIT'); + } + + /** + * @brief Remove the active process from the "process" table + */ + function end_process() { + q('DELETE FROM `process` WHERE `pid` = %d', intval(getmypid())); + } + + /** + * @brief Returns a string with a callstack. Can be used for logging. + * + * @return string + */ + function callstack() { + $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 6); + + // We remove the first two items from the list since they contain data that we don't need. + array_shift($trace); + array_shift($trace); + + $callstack = array(); + foreach ($trace AS $func) { + $callstack[] = $func['function']; + } + + return implode(', ', $callstack); + } + + function get_useragent() { + return + FRIENDICA_PLATFORM . " '" . + FRIENDICA_CODENAME . "' " . + FRIENDICA_VERSION . '-' . + DB_UPDATE_VERSION . '; ' . + $this->get_baseurl(); + } + + function is_friendica_app() { + return $this->is_friendica_app; + } + + /** + * @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. + * + * @return bool Is it a known backend? + */ + function is_backend() { + static $backends = array(); + $backends[] = '_well_known'; + $backends[] = 'api'; + $backends[] = 'dfrn_notify'; + $backends[] = 'fetch'; + $backends[] = 'hcard'; + $backends[] = 'hostxrd'; + $backends[] = 'nodeinfo'; + $backends[] = 'noscrape'; + $backends[] = 'p'; + $backends[] = 'poco'; + $backends[] = 'post'; + $backends[] = 'proxy'; + $backends[] = 'pubsub'; + $backends[] = 'pubsubhubbub'; + $backends[] = 'receive'; + $backends[] = 'rsd_xml'; + $backends[] = 'salmon'; + $backends[] = 'statistics_json'; + $backends[] = 'xrd'; + + // Check if current module is in backend or backend flag is set + return (in_array($this->module, $backends) || $this->backend); + } + + /** + * @brief Checks if the maximum number of database processes is reached + * + * @return bool Is the limit reached? + */ + function max_processes_reached() { + + if ($this->is_backend()) { + $process = 'backend'; + $max_processes = Config::get('system', 'max_processes_backend'); + if (intval($max_processes) == 0) { + $max_processes = 5; + } + } else { + $process = 'frontend'; + $max_processes = Config::get('system', 'max_processes_frontend'); + if (intval($max_processes) == 0) { + $max_processes = 20; + } + } + + $processlist = \dbm::processlist(); + if ($processlist['list'] != '') { + logger('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list'], LOGGER_DEBUG); + + if ($processlist['amount'] > $max_processes) { + logger('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.', LOGGER_DEBUG); + return true; + } + } + return false; + } + + /** + * @brief Checks if the minimal memory is reached + * + * @return bool Is the memory limit reached? + */ + public function min_memory_reached() { + $min_memory = Config::get('system', 'min_memory', 0); + if ($min_memory == 0) { + return false; + } + + if (!is_readable('/proc/meminfo')) { + return false; + } + + $memdata = explode("\n", file_get_contents('/proc/meminfo')); + + $meminfo = array(); + foreach ($memdata as $line) { + list($key, $val) = explode(':', $line); + $meminfo[$key] = (int) trim(str_replace('kB', '', $val)); + $meminfo[$key] = (int) ($meminfo[$key] / 1024); + } + + if (!isset($meminfo['MemAvailable']) OR ! isset($meminfo['MemFree'])) { + return false; + } + + $free = $meminfo['MemAvailable'] + $meminfo['MemFree']; + + $reached = ($free < $min_memory); + + if ($reached) { + logger('Minimal memory reached: ' . $free . '/' . $meminfo['MemTotal'] . ' - limit ' . $min_memory, LOGGER_DEBUG); + } + + return $reached; + } + + /** + * @brief Checks if the maximum load is reached + * + * @return bool Is the load reached? + */ + function maxload_reached() { + + if ($this->is_backend()) { + $process = 'backend'; + $maxsysload = intval(Config::get('system', 'maxloadavg')); + if ($maxsysload < 1) { + $maxsysload = 50; + } + } else { + $process = 'frontend'; + $maxsysload = intval(Config::get('system', 'maxloadavg_frontend')); + if ($maxsysload < 1) { + $maxsysload = 50; + } + } + + $load = current_load(); + if ($load) { + if (intval($load) > $maxsysload) { + logger('system: load ' . $load . ' for ' . $process . ' tasks (' . $maxsysload . ') too high.'); + return true; + } + } + return false; + } + + function proc_run($args) { + + if (!function_exists('proc_open')) { + return; + } + + // If the last worker fork was less than 10 seconds before then don't fork another one. + // This should prevent the forking of masses of workers. + $cachekey = 'app:proc_run:started'; + $result = \Cache::get($cachekey); + + if (!is_null($result) AND ( time() - $result) < 10) { + return; + } + + // Set the timestamp of the last proc_run + \Cache::set($cachekey, time(), CACHE_MINUTE); + + array_unshift($args, ((x($this->config, 'php_path')) && (strlen($this->config['php_path'])) ? $this->config['php_path'] : 'php')); + + // add baseurl to args. cli scripts can't construct it + $args[] = $this->get_baseurl(); + + for ($x = 0; $x < count($args); $x ++) { + $args[$x] = escapeshellarg($args[$x]); + } + + $cmdline = implode($args, ' '); + + if ($this->min_memory_reached()) { + return; + } + + if (Config::get('system', 'proc_windows')) { + $resource = proc_open('cmd /c start /b ' . $cmdline, array(), $foo, $this->get_basepath()); + } else { + $resource = proc_open($cmdline . ' &', array(), $foo, $this->get_basepath()); + } + if (!is_resource($resource)) { + logger('We got no resource for command ' . $cmdline, LOGGER_DEBUG); + return; + } + proc_close($resource); + } + + /** + * @brief Returns the system user that is executing the script + * + * This mostly returns something like "www-data". + * + * @return string system username + */ + static function systemuser() { + if (!function_exists('posix_getpwuid') OR ! function_exists('posix_geteuid')) { + return ''; + } + + $processUser = posix_getpwuid(posix_geteuid()); + return $processUser['name']; + } + + /** + * @brief Checks if a given directory is usable for the system + * + * @return boolean the directory is usable + */ + static function directory_usable($directory, $check_writable = true) { + if ($directory == '') { + logger('Directory is empty. This shouldn\'t happen.', LOGGER_DEBUG); + return false; + } + + if (!file_exists($directory)) { + logger('Path "' . $directory . '" does not exist for user ' . self::systemuser(), LOGGER_DEBUG); + return false; + } + if (is_file($directory)) { + logger('Path "' . $directory . '" is a file for user ' . self::systemuser(), LOGGER_DEBUG); + return false; + } + if (!is_dir($directory)) { + logger('Path "' . $directory . '" is not a directory for user ' . self::systemuser(), LOGGER_DEBUG); + return false; + } + if ($check_writable AND !is_writable($directory)) { + logger('Path "' . $directory . '" is not writable for user ' . self::systemuser(), LOGGER_DEBUG); + return false; + } + return true; + } +}