protected boolean matchUserAgent(final PathMapping pathMapping) {
        if (!pathMapping.hasUAMathcer()) {
            return true;
        }

        if (SingletonLaContainerFactory.getExternalContext().getRequest() != null) {
            return LaRequestUtil.getOptionalRequest().map(request -> {
                final String userAgent = request.getHeader("user-agent");
                if (StringUtil.isBlank(userAgent)) {

        .build()
    val response = client.newCall(headRequest).execute()
    assertThat(response.code).isEqualTo(200)
    assertArrayEquals(ByteArray(0), response.body.bytes())
    val getRequest = Request(server.url("/"))
    executeSynchronously(getRequest)
      .assertCode(200)
      .assertBody("abc")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0)
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(1)
  }

    @Override
    public ActionFuture<GetResponse> get(final GetRequest request) {
        return client.get(request);
    }

    /**
     * Gets a document asynchronously with a callback.
     *
     * @param request  the get request
     * @param listener the response listener
     */
    @Override
    public void get(final GetRequest request, final ActionListener<GetResponse> listener) {

                        requestOpt.ifPresent(externalContext::setRequest);
                        responseOpt.ifPresent(externalContext::setResponse);
                    }
                    return searcher.search(query, reqParams, userBean);
                } finally {
                    if (externalContext != null) {
                        externalContext.setRequest(null);
                        externalContext.setResponse(null);