- protected $headers = [
- Request::HEADER_FORWARDED => 'FORWARDED',
- Request::HEADER_X_FORWARDED_FOR => 'X_FORWARDED_FOR',
- Request::HEADER_X_FORWARDED_HOST => 'X_FORWARDED_HOST',
- Request::HEADER_X_FORWARDED_PORT => 'X_FORWARDED_PORT',
- Request::HEADER_X_FORWARDED_PROTO => 'X_FORWARDED_PROTO',
- ];