protected function getConfigDefaults()
{
return ['listen' => 'tcp://0.0.0.0', 'port' => 80, 'send-file' => 0, 'send-file-dir' => '/dev/shm', 'send-file-prefix' => 'http-', 'send-file-onlybycommand' => 0, 'expose' => 1, 'keepalive' => new Time('0s'), 'chunksize' => new Size('8k'), 'defaultcharset' => 'utf-8', 'wss-name' => '', 'fps-name' => '', 'upload-max-size' => new Size(ini_get('upload_max_filesize')), 'responder' => null];
}