WF 8.0 HTTP Upgrade help needed
by 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
10 years, 11 months
