400 HTTP_BAD_REQUEST
401 HTTP_UNAUTHORIZED
403 HTTP_FORBIDDEN
404 HTTP_NOT_FOUND
405 HTTP_METHOD_NOT_ALLOWED
408 HTTP_REQUEST_TIME_OUT
410 HTTP_GONE
411 HTTP_LENGTH_REQUIRED
412 HTTP_PRECONDITION_FAILED
413 HTTP_REQUEST_ENTITY_TOO_LARGE
414 HTTP_REQUEST_URI_TOO_LARGE
415 HTTP_SERVICE_UNAVAILABLE
500 HTTP_INTERNAL_SERVER_ERROR
501 HTTP_NOT_IMPLEMENTED
502 HTTP_BAD_GATEWAY
503 HTTP_SERVICE_UNAVAILABLE
506 HTTP_VARIANT_ALSO_VARIES
