return opts, valid
	}

	opts.MaxParts, err = parseIntHeader(bucket, object, r.Header, xhttp.AmzMaxParts)
	if err != nil {
		apiErr = toAPIError(ctx, err)
		argumentName = strings.ToLower(xhttp.AmzMaxParts)
		valid = false
		return opts, valid
	}

	if opts.MaxParts == 0 {
		opts.MaxParts = maxPartsList
	}

	opts.PartNumberMarker, err = parseIntHeader(bucket, object, r.Header, xhttp.AmzPartNumberMarker)