}
        final SearchHelper searchHelper = ComponentUtil.getSearchHelper();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if (!fessConfig.isAcceptedSearchReferer(request.getHeader("referer"))) {
            writeJsonResponse(HttpServletResponse.SC_BAD_REQUEST, escapeJsonKeyValue(MESSAGE_FIELD, "Referer is invalid."));
            return;
        }

        if (!fessConfig.isApiSearchScroll()) {

    assertThat(recordedEvents).doesNotContain("DnsEnd")
  }

  @Test
  fun multipleDnsLookupsForSingleCall() {
    server.enqueue(
      MockResponse
        .Builder()
        .code(301)
        .setHeader("Location", "http://www.fakeurl:" + server.port)
        .build(),
    )
    server.enqueue(MockResponse())
    val dns = FakeDns()
    dns["fakeurl"] = client.dns.lookup(server.hostName)

     *
     * @param request the HTTP servlet request
     * @return the client IP address
     */
    public String getClientIp(final HttpServletRequest request) {
        final String value = request.getHeader("x-forwarded-for");
        if (StringUtil.isNotBlank(value)) {
            return value;
        }
        return request.getRemoteAddr();
    }

    /**

  }

  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun head(protocol: Protocol) {
    setUp(protocol)
    val mockResponse =
      MockResponse
        .Builder()
        .setHeader("Content-Length", 5)
        .status("HTTP/1.1 200")
        .build()
    server.enqueue(mockResponse)
    val call =
      client.newCall(
        Request
          .Builder()
          .head()