code: def get_http_boot_url(self):
          
          if(self._is_boot_mode_uefi() is True):
              return self._get_bios_setting('UefiShellStartupUrl')
          else:
              msg = 'get_http_boot_url is not supported in the BIOS boot mode'
              raise exception.IloCommandNotSupportedInBiosError(msg)
docs: Request the http boot url from system in uefi boot mode.
  
          :returns: URL for http boot
          :raises: IloError, on an error from iLO.
          :raises: IloCommandNotSupportedInBiosError, if the system is
                   in the bios boot mode.