private static function createLoggingHandler($handler = null)
{
// set to false to indicate that it is being initialized
self::$loggingHandler = false;
// a set of known logging handlers
$known_handlers = array('syslog' => 'SimpleSAML\\Logger\\SyslogLoggingHandler', 'file' => 'SimpleSAML\\Logger\\FileLoggingHandler', 'errorlog' => 'SimpleSAML\\Logger\\ErrorLogLoggingHandler');
// get the configuration
$config = \SimpleSAML_Configuration::getInstance();
assert($config instanceof \SimpleSAML_Configuration);
// setting minimum log_level
self::$logLevel = $config->getInteger('logging.level', self::INFO);
// get the metadata handler option from the configuration
if (is_null($handler)) {
$handler = $config->getString('logging.handler', 'syslog');
}
if (class_exists($handler)) {
if (!in_array('SimpleSAML\\Logger\\LoggingHandlerInterface', class_implements($handler))) {
throw new \Exception("The logging handler '{$handler}' is invalid.");
}
} else {
$handler = strtolower($handler);
if (!array_key_exists($handler, $known_handlers)) {
throw new \Exception("Invalid value for the 'logging.handler' configuration option. Unknown handler '" . $handler . "''.");
}
$handler = $known_handlers[$handler];
}
self::$loggingHandler = new $handler($config);
self::$format = $config->getString('logging.format', self::$format);
self::$loggingHandler->setLogFormat(self::$format);
}
private static function log($level, $string, $statsLog = false)
{
if (self::$loggingHandler === false) {
// some error occurred while initializing logging
self::defer($level, $string, $statsLog);
return;
} elseif (php_sapi_name() === 'cli' || defined('STDIN')) {
// we are being executed from the CLI, nowhere to log
if (is_null(self::$loggingHandler)) {
self::createLoggingHandler('SimpleSAML\\Logger\\StandardErrorLoggingHandler');
}
$_SERVER['REMOTE_ADDR'] = "CLI";
if (self::$trackid === self::NO_TRACKID) {
self::$trackid = 'CL' . bin2hex(openssl_random_pseudo_bytes(4));
}
} elseif (self::$loggingHandler === null) {
// Initialize logging
self::createLoggingHandler();
if (!empty(self::$earlyLog)) {
// output messages which were logged before we properly initialized logging
foreach (self::$earlyLog as $msg) {
self::log($msg['level'], $msg['string'], $msg['statsLog']);
}
}
}
if (self::$captureLog) {
$ts = microtime(true);
$msecs = (int) (($ts - (int) $ts) * 1000);
$ts = gmdate('H:i:s', $ts) . sprintf('.%03d', $msecs) . 'Z';
self::$capturedLog[] = $ts . ' ' . $string;
}
if (self::$logLevel >= $level || $statsLog) {
if (is_array($string)) {
$string = implode(",", $string);
}
$formats = array('%trackid', '%msg', '%srcip', '%stat');
$replacements = array(self::$trackid, $string, $_SERVER['REMOTE_ADDR']);
$stat = '';
if ($statsLog) {
$stat = 'STAT ';
}
array_push($replacements, $stat);
if (self::$trackid === self::NO_TRACKID && !self::$shuttingDown) {
// we have a log without track ID and we are not still shutting down, so defer logging
self::defer($level, $string, $statsLog);
return;
} elseif (self::$trackid === self::NO_TRACKID) {
// shutting down without a track ID, prettify it
array_shift($replacements);
array_unshift($replacements, 'N/A');
}
// we either have a track ID or we are shutting down, so just log the message
$string = str_replace($formats, $replacements, self::$format);
self::$loggingHandler->log($level, $string);
}
}
