delimiter = values.Get("delimiter")
	encodingType = values.Get("encoding-type")
	return
}

func getListBucketObjectVersionsArgs(values url.Values) (prefix, marker, delimiter string, maxkeys int, encodingType, versionIDMarker string, errCode APIErrorCode) {
	errCode = ErrNone

	if values.Get("max-keys") != "" {
		var err error
		if maxkeys, err = strconv.Atoi(values.Get("max-keys")); err != nil {
			errCode = ErrInvalidMaxKeys

			return checkRequestAuthType(ctx, r, action, bucket, name)
		}
	}
	urlValues := r.Form

	// Extract all the listBucketVersions query params to their native values.
	prefix, marker, delimiter, maxkeys, encodingType, versionIDMarker, errCode := getListBucketObjectVersionsArgs(urlValues)
	if errCode != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(errCode), r.URL)
		return
	}

	// for the version-id-marker request parameter in a subsequent request.
	NextVersionIDMarker string `xml:"NextVersionIdMarker"`

	// Marks the last version of the Key returned in a truncated response.
	VersionIDMarker string `xml:"VersionIdMarker"`

	MaxKeys   int
	Delimiter string `xml:"Delimiter,omitempty"`
	// A flag that indicates whether or not ListObjects returned all of the results
	// that satisfied the search criteria.
	IsTruncated bool