How to use

WWWAuthenticationProtocolHandler

in

org.eclipse.jetty.client

  @Override
  public Response.Listener getResponseListener()
  {
    return new ForwardingResponseListener(super.getResponseListener())
    {
      @Override
      public void onComplete(Result result)
      {
        HttpHeader header = getAuthenticateHeader();
        HttpFields headers = result.getResponse().getHeaders();
        // There is no need to check for a SPNEGO token because it can't exist here:
        // * SPNEGO token only exist if the client successfully authenticated
        // * This authenticate handler is not called when already authenticated
        if (headers.getValuesList(header).stream().anyMatch(NEGOTIATE::equalsIgnoreCase)) {
          headers.put(header, NEGOTIATE + " realm=\"dummy\"");
        }
        super.onComplete(result);
      }
    };
  }
}

@Override
protected void doStart() throws Exception
{
  if (executor == null)
  {
    QueuedThreadPool threadPool = new QueuedThreadPool();
    threadPool.setName(name);
    setExecutor(threadPool);
  }
  if (byteBufferPool == null)
    setByteBufferPool(new MappedByteBufferPool(2048,
        executor instanceof ThreadPool.SizedThreadPool
            ? ((ThreadPool.SizedThreadPool)executor).getMaxThreads() / 2
            : ProcessorUtils.availableProcessors() * 2));
  if (scheduler == null)
    setScheduler(new ScheduledExecutorScheduler(name + "-scheduler", false));
  if (resolver == null)
    setSocketAddressResolver(new SocketAddressResolver.Async(executor, scheduler, getAddressResolutionTimeout()));
  handlers.put(new ContinueProtocolHandler());
  handlers.put(new RedirectProtocolHandler(this));
  handlers.put(new WWWAuthenticationProtocolHandler(this));
  handlers.put(new ProxyAuthenticationProtocolHandler(this));
  decoderFactories.add(new GZIPContentDecoder.Factory(byteBufferPool));
  cookieManager = newCookieManager();
  cookieStore = cookieManager.getCookieStore();
  transport.setHttpClient(this);
  super.doStart();
}