serviceUnavailable constant
HttpStatus
const serviceUnavailable
503 SERVICE UNAVAILABLE.
The server is currently unable to handle the request due to a temporary overload or scheduled maintenance, which will likely be alleviated after some delay.
The server MAY send a Retry-After header field to suggest an appropriate amount of time for the client to wait before retrying the request.
Note: The existence of the 503 status code does not imply that a server has to use it when becoming overloaded. Some servers might simply refuse the connection.
Implementation
static const HttpStatus serviceUnavailable = HttpStatus._(
code: HttpStatusCode.serviceUnavailable,
name: 'Service Unavailable',
description: 'The server is currently unable to handle the request due to '
'a temporary overload or scheduled maintenance, which will likely '
'be alleviated after some delay.',
);