LENGTH_REQUIRED = _HTTPStatus(411, 'Length Required',
            'Client must specify Content-Length')
        PRECONDITION_FAILED = _HTTPStatus(412, 'Precondition Failed',
            'Precondition in headers is false')
        REQUEST_ENTITY_TOO_LARGE = _HTTPStatus(413, 'Request Entity Too Large',
            'Entity is too large')
        REQUEST_URI_TOO_LONG = _HTTPStatus(414, 'Request-URI Too Long',
            'URI is too long')
        UNSUPPORTED_MEDIA_TYPE = _HTTPStatus(415, 'Unsupported Media Type',
            'Entity body in unsupported format')
        REQUESTED_RANGE_NOT_SATISFIABLE = _HTTPStatus(416,
            'Requested Range Not Satisfiable',
            'Cannot satisfy request range')
        EXPECTATION_FAILED = _HTTPStatus(417, 'Expectation Failed',
            'Expect condition could not be satisfied')
        MISDIRECTED_REQUEST = _HTTPStatus(421, 'Misdirected Request',
            'Server is not able to produce a response')
        UNPROCESSABLE_ENTITY = _HTTPStatus(422, 'Unprocessable Entity')
        LOCKED = _HTTPStatus(423, 'Locked')
        FAILED_DEPENDENCY = _HTTPStatus(424, 'Failed Dependency')
        UPGRADE_REQUIRED = _HTTPStatus(426, 'Upgrade Required')
        PRECONDITION_REQUIRED = _HTTPStatus(428, 'Precondition Required',
            'The origin server requires the request to be conditional')
        TOO_MANY_REQUESTS = _HTTPStatus(429, 'Too Many Requests',
            'The user has sent too many requests in '
            'a given amount of time ("rate limiting")')
        REQUEST_HEADER_FIELDS_TOO_LARGE = _HTTPStatus(431,
            'Request Header Fields Too Large',
            'The server is unwilling to process the request because its header '
            'fields are too large')
        UNAVAILABLE_FOR_LEGAL_REASONS = _HTTPStatus(451,
            'Unavailable For Legal Reasons',
            'The server is denying access to the '
            'resource as a consequence of a legal demand')
        INTERNAL_SERVER_ERROR = _HTTPStatus(500, 'Internal Server Error',
            'Server got itself in trouble')
        NOT_IMPLEMENTED = _HTTPStatus(501, 'Not Implemented',
            'Server does not support this operation')
        BAD_GATEWAY = _HTTPStatus(502, 'Bad Gateway',
            'Invalid responses from another server/proxy')
        SERVICE_UNAVAILABLE = _HTTPStatus(503, 'Service Unavailable',
            'The server cannot process the request due to a high load')
        GATEWAY_TIMEOUT = _HTTPStatus(504, 'Gateway Timeout',
            'The gateway server did not receive a timely response')
        HTTP_VERSION_NOT_SUPPORTED = _HTTPStatus(505, 'HTTP Version Not Supported',
            'Cannot fulfill request')
        VARIANT_ALSO_NEGOTIATES = _HTTPStatus(506, 'Variant Also Negotiates')
        INSUFFICIENT_STORAGE = _HTTPStatus(507, 'Insufficient Storage')
        LOOP_DETECTED = _HTTPStatus(508, 'Loop Detected')
        NOT_EXTENDED = _HTTPStatus(510, 'Not Extended')
        NETWORK_AUTHENTICATION_REQUIRED = _HTTPStatus(511,
            'Network Authentication Required',
            'The client needs to authenticate to gain network access')
    )