<?php
/**
- * @file src/Core/System.php
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
*/
+
namespace Friendica\Core;
-use Friendica\BaseObject;
-use Friendica\Network\HTTPException\InternalServerErrorException;
+use Friendica\Core\Config\Capability\IManageConfigValues;
+use Friendica\DI;
+use Friendica\Module\Response;
+use Friendica\Network\HTTPException\FoundException;
+use Friendica\Network\HTTPException\MovedPermanentlyException;
+use Friendica\Network\HTTPException\TemporaryRedirectException;
+use Friendica\Util\BasePath;
use Friendica\Util\XML;
+use Psr\Log\LoggerInterface;
/**
- * @file include/Core/System.php
- *
- * @brief Contains the class with system relevant stuff
+ * Contains the class with system relevant stuff
*/
+class System
+{
+ /**
+ * @var LoggerInterface
+ */
+ private $logger;
+ /**
+ * @var IManageConfigValues
+ */
+ private $config;
+
+ /**
+ * @var string
+ */
+ private $basePath;
+
+ public function __construct(LoggerInterface $logger, IManageConfigValues $config, string $basepath)
+ {
+ $this->logger = $logger;
+ $this->config = $config;
+ $this->basePath = $basepath;
+ }
-/**
- * @brief System methods
- */
-class System extends BaseObject
-{
/**
- * @brief Retrieves the Friendica instance base URL
+ * Checks if the maximum number of database processes is reached
*
- * @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
- * @return string Friendica server base URL
- * @throws InternalServerErrorException
+ * @return bool Is the limit reached?
*/
- public static function baseUrl($ssl = false)
+ public function isMaxProcessesReached(): bool
{
- return self::getApp()->getBaseURL($ssl);
+ // Deactivated, needs more investigating if this check really makes sense
+ return false;
+
+ /*
+ * Commented out to suppress static analyzer issues
+ *
+ if ($this->mode->isBackend()) {
+ $process = 'backend';
+ $max_processes = $this->config->get('system', 'max_processes_backend');
+ if (intval($max_processes) == 0) {
+ $max_processes = 5;
+ }
+ } else {
+ $process = 'frontend';
+ $max_processes = $this->config->get('system', 'max_processes_frontend');
+ if (intval($max_processes) == 0) {
+ $max_processes = 20;
+ }
+ }
+
+ $processlist = DBA::processlist();
+ if ($processlist['list'] != '') {
+ $this->logger->debug('Processcheck: Processes: ' . $processlist['amount'] . ' - Processlist: ' . $processlist['list']);
+
+ if ($processlist['amount'] > $max_processes) {
+ $this->logger->debug('Processcheck: Maximum number of processes for ' . $process . ' tasks (' . $max_processes . ') reached.');
+ return true;
+ }
+ }
+ return false;
+ */
}
/**
- * @brief Removes the baseurl from an url. This avoids some mixed content problems.
+ * Checks if the minimal memory is reached
*
- * @param string $orig_url The url to be cleaned
+ * @return bool Is the memory limit reached?
+ */
+ public function isMinMemoryReached(): bool
+ {
+ // Deactivated, needs more investigating if this check really makes sense
+ return false;
+
+ /*
+ * Commented out to suppress static analyzer issues
+ *
+ $min_memory = $this->config->get('system', 'min_memory', 0);
+ if ($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;
+ }
+ [$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) {
+ $this->logger->warning('Minimal memory reached.', ['free' => $free, 'memtotal' => $meminfo['MemTotal'], 'limit' => $min_memory]);
+ }
+
+ return $reached;
+ */
+ }
+
+ /**
+ * Checks if the maximum load is reached
*
- * @return string The cleaned url
- * @throws \Exception
+ * @return bool Is the load reached?
*/
- public static function removedBaseUrl($orig_url)
+ public function isMaxLoadReached(): bool
{
- return self::getApp()->removeBaseURL($orig_url);
+ $maxsysload = intval($this->config->get('system', 'maxloadavg'));
+ if ($maxsysload < 1) {
+ $maxsysload = 50;
+ }
+
+ $load = System::currentLoad();
+ if ($load) {
+ if (intval($load) > $maxsysload) {
+ $this->logger->warning('system load for process too high.', ['load' => $load, 'process' => 'backend', 'maxsysload' => $maxsysload]);
+ return true;
+ }
+ }
+ return false;
}
/**
- * @brief Returns a string with a callstack. Can be used for logging.
- * @param integer $depth optional, default 4
+ * 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, ... ]
+ */
+ public function run(string $command, array $args)
+ {
+ if (!function_exists('proc_open')) {
+ $this->logger->warning('"proc_open" not available - quitting');
+ 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()) {
+ $this->logger->warning('Memory limit reached - quitting');
+ 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)) {
+ $this->logger->warning('We got no resource for command.', ['command' => $cmdline]);
+ return;
+ }
+
+ proc_close($resource);
+
+ $this->logger->info('Executed "proc_open"', ['command' => $cmdline, 'callstack' => System::callstack(10)]);
+ }
+
+ /**
+ * Returns a string with a callstack. Can be used for logging.
+ *
+ * @param integer $depth How many calls to include in the stacks after filtering
+ * @param int $offset How many calls to shave off the top of the stack, for example if
+ * this is called from a centralized method that isn't relevant to the callstack
* @return string
*/
- public static function callstack($depth = 4)
+ public static function callstack(int $depth = 4, int $offset = 0): string
{
$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
- // We remove the first two items from the list since they contain data that we don't need.
- array_shift($trace);
- array_shift($trace);
+ // We remove at least the first two items from the list since they contain data that we don't need.
+ $trace = array_slice($trace, 2 + $offset);
$callstack = [];
- $previous = ['class' => '', 'function' => ''];
+ $previous = ['class' => '', 'function' => '', 'database' => false];
// The ignore list contains all functions that are only wrapper functions
- $ignore = ['fetchUrl', 'call_user_func_array'];
+ $ignore = ['call_user_func_array'];
while ($func = array_pop($trace)) {
if (!empty($func['class'])) {
- // Don't show multiple calls from the "dba" class to show the essential parts of the callstack
- if ((($previous['class'] != $func['class']) || ($func['class'] != 'Friendica\Database\DBA')) && ($previous['function'] != 'q')) {
+ if (in_array($previous['function'], ['insert', 'fetch', 'toArray', 'exists', 'count', 'selectFirst', 'selectToArray',
+ 'select', 'update', 'delete', 'selectFirstForUser', 'selectForUser'])
+ && (substr($previous['class'], 0, 15) === 'Friendica\Model')) {
+ continue;
+ }
+
+ // Don't show multiple calls from the Database classes to show the essential parts of the callstack
+ $func['database'] = in_array($func['class'], ['Friendica\Database\DBA', 'Friendica\Database\Database']);
+ if (!$previous['database'] || !$func['database']) {
$classparts = explode("\\", $func['class']);
$callstack[] = array_pop($classparts).'::'.$func['function'];
$previous = $func;
}
} elseif (!in_array($func['function'], $ignore)) {
+ $func['database'] = ($func['function'] == 'q');
$callstack[] = $func['function'];
$func['class'] = '';
$previous = $func;
}
if ($st) {
- Logger::log('xml_status returning non_zero: ' . $st . " message=" . $message);
+ Logger::notice('xml_status returning non_zero: ' . $st . " message=" . $message);
}
- header("Content-type: text/xml");
-
- $xmldata = ["result" => $result];
-
- echo XML::fromArray($xmldata, $xml);
+ DI::apiResponse()->setType(Response::TYPE_XML);
+ DI::apiResponse()->addContent(XML::fromArray(["result" => $result], $xml));
+ DI::page()->exit(DI::apiResponse()->generate());
exit();
}
/**
- * @brief Send HTTP status header and exit.
+ * Send HTTP status header and exit.
*
- * @param integer $val HTTP status result value
- * @param array $description optional message
- * 'title' => header title
- * 'description' => optional message
- * @throws InternalServerErrorException
+ * @param integer $val HTTP status result value
+ * @param string $message Error message. Optional.
+ * @param string $content Response body. Optional.
+ * @throws \Exception
*/
- public static function httpExit($val, $description = [])
+ public static function httpExit($val, $message = '', $content = '')
{
- $err = '';
if ($val >= 400) {
- if (!empty($description['title'])) {
- $err = $description['title'];
- } else {
- $title = [
- '400' => L10n::t('Error 400 - Bad Request'),
- '401' => L10n::t('Error 401 - Unauthorized'),
- '403' => L10n::t('Error 403 - Forbidden'),
- '404' => L10n::t('Error 404 - Not Found'),
- '500' => L10n::t('Error 500 - Internal Server Error'),
- '503' => L10n::t('Error 503 - Service Unavailable'),
- ];
- $err = defaults($title, $val, 'Error ' . $val);
- $description['title'] = $err;
- }
- if (empty($description['description'])) {
- // Explanations are taken from https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
- $explanation = [
- '400' => L10n::t('The server cannot or will not process the request due to an apparent client error.'),
- '401' => L10n::t('Authentication is required and has failed or has not yet been provided.'),
- '403' => L10n::t('The request was valid, but the server is refusing action. The user might not have the necessary permissions for a resource, or may need an account.'),
- '404' => L10n::t('The requested resource could not be found but may be available in the future.'),
- '500' => L10n::t('An unexpected condition was encountered and no more specific message is suitable.'),
- '503' => L10n::t('The server is currently unavailable (because it is overloaded or down for maintenance). Please try again later.'),
- ];
- if (!empty($explanation[$val])) {
- $description['description'] = $explanation[$val];
- }
- }
- }
-
- if ($val >= 200 && $val < 300) {
- $err = 'OK';
+ Logger::debug('Exit with error', ['code' => $val, 'message' => $message, 'callstack' => System::callstack(20), 'method' => DI::args()->getMethod(), 'agent' => $_SERVER['HTTP_USER_AGENT'] ?? '']);
}
+ DI::apiResponse()->setStatus($val, $message);
+ DI::apiResponse()->addContent($content);
+ DI::page()->exit(DI::apiResponse()->generate());
- Logger::log('http_status_exit ' . $val);
- header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
+ exit();
+ }
- if (isset($description["title"])) {
- $tpl = Renderer::getMarkupTemplate('http_status.tpl');
- echo Renderer::replaceMacros($tpl, ['$title' => $description["title"],
- '$description' => defaults($description, 'description', '')]);
+ public static function jsonError($httpCode, $data, $content_type = 'application/json')
+ {
+ if ($httpCode >= 400) {
+ Logger::debug('Exit with error', ['code' => $httpCode, 'content_type' => $content_type, 'callstack' => System::callstack(20), 'method' => DI::args()->getMethod(), 'agent' => $_SERVER['HTTP_USER_AGENT'] ?? '']);
}
-
- exit();
+ DI::apiResponse()->setStatus($httpCode);
+ self::jsonExit($data, $content_type);
}
/**
- * @brief Encodes content to json.
+ * Encodes content to json.
*
* This function encodes an array to json format
* and adds an application/json HTTP header to the output.
* After finishing the process is getting killed.
*
- * @param array $x The input content.
- * @param string $content_type Type of the input (Default: 'application/json').
+ * @param mixed $x The input content.
+ * @param string $content_type Type of the input (Default: 'application/json').
+ * @param integer $options JSON options
*/
- public static function jsonExit($x, $content_type = 'application/json') {
- header("Content-type: $content_type");
- echo json_encode($x);
+ public static function jsonExit($x, $content_type = 'application/json', int $options = 0) {
+ DI::apiResponse()->setType(Response::TYPE_JSON, $content_type);
+ DI::apiResponse()->addContent(json_encode($x, $options));
+ DI::page()->exit(DI::apiResponse()->generate());
exit();
}
if (is_bool($prefix) && !$prefix) {
$prefix = '';
} elseif (empty($prefix)) {
- $prefix = hash('crc32', self::getApp()->getHostName());
+ $prefix = hash('crc32', DI::baseUrl()->getHostname());
}
while (strlen($prefix) < ($size - 13)) {
}
}
- /**
- * Generates a process identifier for the logging
- *
- * @param string $prefix A given prefix
- *
- * @return string a generated process identifier
- */
- public static function processID($prefix)
- {
- // We aren't calling any other function here.
- // Doing so could easily create an endless loop
- $trailer = $prefix . ':' . getmypid() . ':';
- return substr($trailer . uniqid('') . mt_rand(), 0, 26);
- }
-
/**
* Returns the current Load of the System
*
* Redirects to an external URL (fully qualified URL)
* If you want to route relative to the current Friendica base, use App->internalRedirect()
*
- * @param string $url The new Location to redirect
- * @throws InternalServerErrorException If the URL is not fully qualified
+ * @param string $url The new Location to redirect
+ * @param int $code The redirection code, which is used (Default is 302)
*/
- public static function externalRedirect($url)
+ public static function externalRedirect($url, $code = 302)
{
if (empty(parse_url($url, PHP_URL_SCHEME))) {
- throw new InternalServerErrorException("'$url' is not a fully qualified URL, please use App->internalRedirect() instead");
+ Logger::warning('No fully qualified URL provided', ['url' => $url, 'callstack' => self::callstack(20)]);
+ DI::baseUrl()->redirect($url);
}
header("Location: $url");
+
+ switch ($code) {
+ case 302:
+ throw new FoundException();
+ case 301:
+ throw new MovedPermanentlyException();
+ case 307:
+ throw new TemporaryRedirectException();
+ }
+
exit();
}
/**
- * @brief Returns the system user that is executing the script
+ * Returns the system user that is executing the script
*
* This mostly returns something like "www-data".
*
}
/**
- * @brief Checks if a given directory is usable for the system
+ * Checks if a given directory is usable for the system
*
* @param $directory
* @param bool $check_writable
public static function isDirectoryUsable($directory, $check_writable = true)
{
if ($directory == '') {
- Logger::log('Directory is empty. This shouldn\'t happen.', Logger::DEBUG);
+ Logger::info('Directory is empty. This shouldn\'t happen.');
return false;
}
if (!file_exists($directory)) {
- Logger::log('Path "' . $directory . '" does not exist for user ' . static::getUser(), Logger::DEBUG);
+ Logger::info('Path "' . $directory . '" does not exist for user ' . static::getUser());
return false;
}
if (is_file($directory)) {
- Logger::log('Path "' . $directory . '" is a file for user ' . static::getUser(), Logger::DEBUG);
+ Logger::info('Path "' . $directory . '" is a file for user ' . static::getUser());
return false;
}
if (!is_dir($directory)) {
- Logger::log('Path "' . $directory . '" is not a directory for user ' . static::getUser(), Logger::DEBUG);
+ Logger::info('Path "' . $directory . '" is not a directory for user ' . static::getUser());
return false;
}
if ($check_writable && !is_writable($directory)) {
- Logger::log('Path "' . $directory . '" is not writable for user ' . static::getUser(), Logger::DEBUG);
+ Logger::info('Path "' . $directory . '" is not writable for user ' . static::getUser());
return false;
}
return true;
}
- /// @todo Move the following functions from boot.php
- /*
- function killme()
- function local_user()
- function public_contact()
- function remote_user()
- function notice($s)
- function info($s)
- function is_site_admin()
- function get_server()
- function get_temppath()
- function get_cachefile($file, $writemode = true)
- function get_itemcachepath()
- function get_spoolpath()
- */
+ /**
+ * Exit method used by asynchronous update modules
+ *
+ * @param string $o
+ */
+ public static function htmlUpdateExit($o)
+ {
+ DI::apiResponse()->setType(Response::TYPE_HTML);
+ echo "<!DOCTYPE html><html><body>\r\n";
+ // We can remove this hack once Internet Explorer recognises HTML5 natively
+ echo "<section>";
+ // reportedly some versions of MSIE don't handle tabs in XMLHttpRequest documents very well
+ echo str_replace("\t", " ", $o);
+ echo "</section>";
+ echo "</body></html>\r\n";
+ exit();
+ }
+
+ /**
+ * Fetch the temp path of the system
+ *
+ * @return string Path for temp files
+ */
+ public static function getTempPath()
+ {
+ $temppath = DI::config()->get("system", "temppath");
+
+ if (($temppath != "") && System::isDirectoryUsable($temppath)) {
+ // We have a temp path and it is usable
+ return BasePath::getRealPath($temppath);
+ }
+
+ // We don't have a working preconfigured temp path, so we take the system path.
+ $temppath = sys_get_temp_dir();
+
+ // Check if it is usable
+ if (($temppath != "") && System::isDirectoryUsable($temppath)) {
+ // Always store the real path, not the path through symlinks
+ $temppath = BasePath::getRealPath($temppath);
+
+ // To avoid any interferences with other systems we create our own directory
+ $new_temppath = $temppath . "/" . DI::baseUrl()->getHostname();
+ if (!is_dir($new_temppath)) {
+ /// @TODO There is a mkdir()+chmod() upwards, maybe generalize this (+ configurable) into a function/method?
+ mkdir($new_temppath);
+ }
+
+ if (System::isDirectoryUsable($new_temppath)) {
+ // The new path is usable, we are happy
+ DI::config()->set("system", "temppath", $new_temppath);
+ return $new_temppath;
+ } else {
+ // We can't create a subdirectory, strange.
+ // But the directory seems to work, so we use it but don't store it.
+ return $temppath;
+ }
+ }
+
+ // Reaching this point means that the operating system is configured badly.
+ return '';
+ }
+
+ /**
+ * Returns the path where spool files are stored
+ *
+ * @return string Spool path
+ */
+ public static function getSpoolPath()
+ {
+ $spoolpath = DI::config()->get('system', 'spoolpath');
+ if (($spoolpath != "") && System::isDirectoryUsable($spoolpath)) {
+ // We have a spool path and it is usable
+ return $spoolpath;
+ }
+
+ // We don't have a working preconfigured spool path, so we take the temp path.
+ $temppath = self::getTempPath();
+
+ if ($temppath != "") {
+ // To avoid any interferences with other systems we create our own directory
+ $spoolpath = $temppath . "/spool";
+ if (!is_dir($spoolpath)) {
+ mkdir($spoolpath);
+ }
+
+ if (System::isDirectoryUsable($spoolpath)) {
+ // The new path is usable, we are happy
+ DI::config()->set("system", "spoolpath", $spoolpath);
+ return $spoolpath;
+ } else {
+ // We can't create a subdirectory, strange.
+ // But the directory seems to work, so we use it but don't store it.
+ return $temppath;
+ }
+ }
+
+ // Reaching this point means that the operating system is configured badly.
+ return "";
+ }
}