case piece[i] >= '0' && piece[i] <= '9':
				// Nothing to do.
			default:
				// Found invalid character.
				return false
			}
		}
		allNumbers = allNumbers && !isNotNumber
	}
	// Does the bucket name look like an IP address?
	return len(pieces) != 4 || !allNumbers
}

// IsValidObjectName verifies an object name in accordance with Amazon's
// requirements. It cannot exceed 1024 characters and must be a valid UTF8