Hi Folks,
I’m using Jetty 9.2.13.v20150730 in an embedded setup, and wish to test out websocket compression. I know that historically the standard hasn’t been stable, and there have been some implementation bugs, but it looks like things have been
fixed and some time has passed. I figure that testing is the way forward.
Looking at websocket upgrade request and response headers in wireshark, it looks like permessage-deflate is being offered by Chrome, but being ignored by Jetty. I think this is because of this bug and change which disabled the websocket
extensions by default:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=431459
http://git.eclipse.org/c/jetty/org.eclipse.jetty.project.git/commit/?h=jetty-9.1.x&id=bfbd2a7d8f18b57f2b527b6d07949d41dfd6e31d
I’d like to re-enable those extensions, but don’t know quite how to achieve this and can’t find a good reference. From the above bug, it suggests the following:
“public void configure(WebSocketServletFactory factory)
{
factory.getExtensionFactory().register(
"permessage-deflate",PerMessageDeflateExtension.class);
factory.register(MySocket.class)
}
This applies to use of websocket via the WebSocketServlet (or WebSocketHandler), using the Jetty WebSocket API.”
However, in my setup I’m not extending a WebSocketServlet, instead I’m using annotated POJOs which use @OnOpen, @OnMessage etc… to handle the websocket messages very nicely. Therefore I’m not sure how or where I can access the WebsocketServerFactory
to get at the ExtensionFactory to make the required registrations.
I configure the server like this:
Server server = new Server(PORT);
WebAppContext wac = new WebAppContext(warFile.getAbsolutePath(), "/");
ClassList classlist = ClassList.setServerDefault(server);
classlist.addBefore("org.eclipse.jetty.webapp.JettyWebXmlConfiguration", "org.eclipse.jetty.annotations.AnnotationConfiguration");
wac.setAttribute("org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern",
".*/[^/]*servlet-api-[^/]*\\.jar$|.*/javax.servlet.jsp.jstl-.*\\.jar$|.*/[^/]*taglibs.*\\.jar$");
ServerContainer wscontainer = WebSocketServerContainerInitializer.configureContext(wac);
wscontainer.addEndpoint(MyDataSourceWebSocketServlet.class);
server.start();
Any pointers or suggestions would be gratefully received.
Kind Regards,
Mike