可用值:ACCEPTED,ALREADY_REPORTED,BAD_GATEWAY,BAD_REQUEST,BANDWIDTH_LIMIT_EXCEEDED,CHECKPOINT,CONFLICT,CONTINUE,CREATED,DESTINATION_LOCKED,EXPECTATION_FAILED,FAILED_DEPENDENCY,FORBIDDEN,FOUND,GATEWAY_TIMEOUT,GONE,HTTP_VERSION_NOT_SUPPORTED,IM_USED,INSUFFICIENT_SPACE_ON_RESOURCE,INSUFFICIENT_STORAGE,INTERNAL_SERVER_ERROR,I_AM_A_TEAPOT,LENGTH_REQUIRED,LOCKED,LOOP_DETECTED,METHOD_FAILURE,METHOD_NOT_ALLOWED,MOVED_PERMANENTLY,MOVED_TEMPORARILY,MULTIPLE_CHOICES,MULTI_STATUS,NETWORK_AUTHENTICATION_REQUIRED,NON_AUTHORITATIVE_INFORMATION,NOT_ACCEPTABLE,NOT_EXTENDED,NOT_FOUND,NOT_IMPLEMENTED,NOT_MODIFIED,NO_CONTENT,OK,PARTIAL_CONTENT,PAYLOAD_TOO_LARGE,PAYMENT_REQUIRED,PERMANENT_REDIRECT,PRECONDITION_FAILED,PRECONDITION_REQUIRED,PROCESSING,PROXY_AUTHENTICATION_REQUIRED,REQUESTED_RANGE_NOT_SATISFIABLE,REQUEST_ENTITY_TOO_LARGE,REQUEST_HEADER_FIELDS_TOO_LARGE,REQUEST_TIMEOUT,REQUEST_URI_TOO_LONG,RESET_CONTENT,SEE_OTHER,SERVICE_UNAVAILABLE,SWITCHING_PROTOCOLS,TEMPORARY_REDIRECT,TOO_EARLY,TOO_MANY_REQUESTS,UNAUTHORIZED,UNAVAILABLE_FOR_LEGAL_REASONS,UNPROCESSABLE_ENTITY,UNSUPPORTED_MEDIA_TYPE,UPGRADE_REQUIRED,URI_TOO_LONG,USE_PROXY,VARIANT_ALSO_NEGOTIATES
