}

func headerValue(h http.Header, headerNames []string) string {
	for _, headerName := range headerNames {
		headerValue := h.Get(headerName)
		if len(headerValue) > 0 {
			return headerValue
		}
	}
	return ""
}

func allHeaderValues(h http.Header, headerNames []string) []string {
	ret := []string{}
	for _, headerName := range headerNames {
		headerKey := http.CanonicalHeaderKey(headerName)

	Square
)

type RoutingClaim struct {
	Match     bool
	Separator Separator
	Claims    []string
}

func ToRoutingClaim(headerName string) RoutingClaim {
	rc := RoutingClaim{}
	if !strings.HasPrefix(strings.ToLower(headerName), HeaderJWTClaim) {
		return rc
	}

	name := headerName[len(HeaderJWTClaim):]
	if strings.HasPrefix(name, ".") && len(name) > 1 {
		// using `.` as a separator
		rc.Match = true

        Map<String, String> entries = request.getHeaderNames().toList().collectEntries { headerName -> [headerName, request.getHeader(headerName as String)] }
        allHeaders.add(entries)
        String authorization = getAuthorizationHeader(request)
        if (authorization != null) {
            synchronized (authenticationAttempts) {

		req.Header.Del(authenticationv1.ImpersonateGroupHeader)
		req.Header.Del(authenticationv1.ImpersonateUIDHeader)
		for headerName := range req.Header {
			if strings.HasPrefix(headerName, authenticationv1.ImpersonateUserExtraHeaderPrefix) {
				req.Header.Del(headerName)
			}
		}

		handler.ServeHTTP(w, req)
	})
}

func userString(u user.Info) string {
	if u == nil {
		return "<none>"

 *
 * ```
 * WWW-Authenticate: Digest ,foo=bar
 * WWW-Authenticate: Digest ,foo
 * ```
 */
fun Headers.parseChallenges(headerName: String): List<Challenge> {
  val result = mutableListOf<Challenge>()
  for (h in 0 until size) {
    if (headerName.equals(name(h), ignoreCase = true)) {
      val header = Buffer().writeUtf8(value(h))
      try {
        header.readChallengeHeader(result)