[wildfly-dev] WF 8.0 HTTP Upgrade help needed

[PB]

Hi,

I'm testing the HTTP Upgrade feature of WF 8.0 and I'm facing some banal
problem. Basically my ReadListener is NEVER called.
Here's the code:

@WebServlet(urlPatterns = "/upgrade")
public class UpgradeServlet extends HttpServlet {
  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
    if ("upgrade".equalsIgnoreCase(req.getHeader("Connection"))) {
      req.upgrade(EchoHandler.class);
    }
  }
}

public class EchoHandler implements HttpUpgradeHandler {
  @Override
  public void init(WebConnection wc) {
    try {
      ServletInputStream in = wc.getInputStream();
      ServletOutputStream out = wc.getOutputStream();

      BlockingQueue<String> queue = new LinkedBlockingQueue<String>();
      in.setReadListener(new EchoReadListener(queue, in));
      out.setWriteListener(new EchoWriteListener(queue, out));
    } catch (IOException e) {
      throw new IllegalStateException(e);
    }
  }

public class EchoReadListener implements ReadListener {
  @Override
  public void onDataAvailable() throws IOException {
    while (in.isReady()) {
      int length = in.read(buffer);
      String input = new String(buffer, 0, length);
      if (false == queue.offer(input)) {
        System.err.println("'" + input + "' input was ignored");
      }
    }
  }

I'm connecting to WF using telnet and sending the upgrade request:
GET /example-webapp/upgrade HTTP/1.1
Host: localhost
Connection: upgrade
Upgrade: echo

and I'm getting correct response:

HTTP/1.1 101 Switching Protocols
Connection: Upgrade
X-Powered-By: Undertow 1
Server: Wildfly 8
Content-Length: 0

which means that from now on the protocol between my telnet client and WF
is pure TCP.
So, I start typing some text, hit Enter and.... nothing happens.
onDataAvailable() is NEVER called. More so, this makes WF totally
irresponsive - my whole webapp is dead.

I believe, I'm doing something wrong - any ideas what exactly? There is
also a slight chance that Upgrade feature in WF is f****d :)
Anyway, WF should not block even in case my upgraded protocol is not
working correctly?

Many thanks,
Przemyslaw
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