return
	}

	// Check if metadata directive is valid.
	if !isDirectiveValid(r.Header.Get(xhttp.AmzMetadataDirective)) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidMetadataDirective), r.URL)
		return
	}

	// check if tag directive is valid
	if !isDirectiveValid(r.Header.Get(xhttp.AmzTagDirective)) {