mirror of https://github.com/friendica/friendica
240 lines
6.0 KiB
PHP
240 lines
6.0 KiB
PHP
<?php
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/**
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* @file src/Core/System.php
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*/
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namespace Friendica\Core;
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use Friendica\BaseObject;
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use Friendica\Util\XML;
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/**
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* @file include/Core/System.php
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*
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* @brief Contains the class with system relevant stuff
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*/
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/**
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* @brief System methods
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*/
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class System extends BaseObject
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{
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/**
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* @brief Retrieves the Friendica instance base URL
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*
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* @param bool $ssl Whether to append http or https under SSL_POLICY_SELFSIGN
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* @return string Friendica server base URL
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*/
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public static function baseUrl($ssl = false)
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{
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return self::getApp()->get_baseurl($ssl);
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}
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/**
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* @brief Removes the baseurl from an url. This avoids some mixed content problems.
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*
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* @param string $orig_url The url to be cleaned
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*
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* @return string The cleaned url
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*/
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public static function removedBaseUrl($orig_url)
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{
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return self::getApp()->remove_baseurl($orig_url);
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}
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/**
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* @brief Returns a string with a callstack. Can be used for logging.
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* @param integer $depth optional, default 4
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* @return string
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*/
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public static function callstack($depth = 4)
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{
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$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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// We remove the first two items from the list since they contain data that we don't need.
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array_shift($trace);
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array_shift($trace);
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$callstack = [];
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$counter = 0;
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$previous = ['class' => '', 'function' => ''];
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// The ignore list contains all functions that are only wrapper functions
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$ignore = ['fetchUrl', 'call_user_func_array'];
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while ($func = array_pop($trace)) {
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if (!empty($func['class'])) {
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// Don't show multiple calls from the "dba" class to show the essential parts of the callstack
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if ((($previous['class'] != $func['class']) || ($func['class'] != 'dba')) && ($previous['function'] != 'q')) {
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$classparts = explode("\\", $func['class']);
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$callstack[] = array_pop($classparts).'::'.$func['function'];
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$previous = $func;
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}
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} elseif (!in_array($func['function'], $ignore)) {
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$callstack[] = $func['function'];
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$func['class'] = '';
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$previous = $func;
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}
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}
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$callstack2 = [];
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while ((count($callstack2) < $depth) && (count($callstack) > 0)) {
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$callstack2[] = array_pop($callstack);
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}
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return implode(', ', $callstack2);
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}
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/**
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* @brief Called from db initialisation when db is dead.
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*/
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static public function unavailable() {
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echo <<< EOT
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<html>
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<head><title>System Unavailable</title></head>
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<body>Apologies but this site is unavailable at the moment. Please try again later.</body>
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</html>
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EOT;
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killme();
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}
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/**
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* Generic XML return
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* Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
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* of $st and an optional text <message> of $message and terminates the current process.
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*/
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public static function xmlExit($st, $message = '')
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{
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$result = ['status' => $st];
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if ($message != '') {
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$result['message'] = $message;
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}
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if ($st) {
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logger('xml_status returning non_zero: ' . $st . " message=" . $message);
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}
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header("Content-type: text/xml");
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$xmldata = ["result" => $result];
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echo XML::fromArray($xmldata, $xml);
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killme();
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}
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/**
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* @brief Send HTTP status header and exit.
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*
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* @param integer $val HTTP status result value
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* @param array $description optional message
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* 'title' => header title
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* 'description' => optional message
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*/
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public static function httpExit($val, $description = [])
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{
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$err = '';
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if ($val >= 400) {
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$err = 'Error';
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if (!isset($description["title"])) {
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$description["title"] = $err." ".$val;
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}
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}
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if ($val >= 200 && $val < 300) {
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$err = 'OK';
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}
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logger('http_status_exit ' . $val);
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header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
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if (isset($description["title"])) {
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$tpl = get_markup_template('http_status.tpl');
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echo replace_macros($tpl, ['$title' => $description["title"],
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'$description' => defaults($description, 'description', '')]);
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}
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killme();
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}
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/**
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* @brief Encodes content to json.
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*
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* This function encodes an array to json format
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* and adds an application/json HTTP header to the output.
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* After finishing the process is getting killed.
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*
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* @param array $x The input content.
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* @param string $content_type Type of the input (Default: 'application/json').
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*/
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public static function jsonExit($x, $content_type = 'application/json') {
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header("Content-type: $content_type");
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echo json_encode($x);
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killme();
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}
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/**
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* Generates a GUID with the given parameters
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*
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* @param int $size The size of the GUID (default is 16)
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* @param bool|string $prefix A given prefix (default is empty)
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* @return string a generated GUID
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*/
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public static function createGUID($size = 16, $prefix = '')
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{
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if (is_bool($prefix) && !$prefix) {
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$prefix = '';
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} elseif (empty($prefix)) {
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$prefix = hash('crc32', self::getApp()->get_hostname());
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}
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while (strlen($prefix) < ($size - 13)) {
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$prefix .= mt_rand();
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}
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if ($size >= 24) {
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$prefix = substr($prefix, 0, $size - 22);
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return str_replace('.', '', uniqid($prefix, true));
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} else {
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$prefix = substr($prefix, 0, max($size - 13, 0));
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return uniqid($prefix);
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}
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}
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/**
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* Generates a process identifier for the logging
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*
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* @param string $prefix A given prefix
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*
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* @return string a generated process identifier
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*/
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public static function processID($prefix)
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{
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// We aren't calling any other function here.
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// Doing so could easily create an endless loop
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$trailer = $prefix . ':' . getmypid() . ':';
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return substr($trailer . uniqid('') . mt_rand(), 0, 26);
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}
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/// @todo Move the following functions from boot.php
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/*
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function killme()
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function goaway($s)
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function local_user()
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function public_contact()
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function remote_user()
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function notice($s)
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function info($s)
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function is_site_admin()
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function random_digits($digits)
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function get_server()
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function get_temppath()
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function get_cachefile($file, $writemode = true)
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function get_itemcachepath()
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function get_spoolpath()
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function current_load()
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*/
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}
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