Jetty 9.0 embeded config with SPDY but without SSL/NPN

Question

SSL/NPN will be handled via our loadbalancer (Haproxy), so I don't really need Jetty to do this for us.

But all the examples I can see on the web only show how to do this with SSL/NPN, not without.

Here's what I've attempted so far:

Server server = new Server();
HTTPConfiguration httpConfig = .... // set up some additional http config here
PushStrategey push = new ReferrerPushStrategy();
List<ConnectionFactory> factories = new ArrayList<>();
factories.add(new HTTPSPDYServerConnectionFactory(SPDY.V3, httpConfig, push));
factories.add(new HTTPSPDYServerConnectionFactory(SPDY.V2, httpConfig, push));
factories.add(new HTTPConnectionFactory(httpConfig));
ServerConnector connector = new ServerConnector(server, factories.toArray(new ConnectionFactory[factories.size()]));
connector.setPort(port);
server.addConnector(connector);
connector.start();
....

Unfortunately, it seems something is wrong, when I try to access the server via clients like curl or my browser they hang indefinitely. What am I doing wrong?

Thanks

Answer 1

When you configure a ServerConnector to speak clear-text SPDY, your clients must also speak clear-text SPDY.

If you use clients like curl or the browser, they don't speak clear-text SPDY. The clients will send a HTTP request which is not understood (the server expects SPDY), and that's why your connection "hangs".

Only Chromium/Chrome has a mode where you can make it speak clear-text SPDY, using the --use-spdy=no-ssl parameter as described here.

Therefore, if you're using clear-text SPDY there is no point in configuring multiple ServerConnectionFactory because there is no way to select one based on the protocol being negotiated, because there is no protocol negotiation.

The protocol negotiation only happens when using SSL+NPN.

Your code is basically correct (apart the unnecessary multiple ServerConnectionFactory) if you really want to setup a clear-text SPDY ServerConnector; this is an example of how the same is setup in the Jetty SPDY test suite.

Finally, see also the reference documentation about SPDY.