code: @Override
    protected CharSequence getHost()
    {
      if (_host != null)
        return _host;
  
      if (_uriHost.length() > 0) {
        _host = _uriHost;
      }
      else if ((_host = getForwardedHostHeader()) != null) {
      }
      else {
        _host = getHostHeader();
      }
  
      return _host;
    }
docs: Returns the virtual host of the request