I've definitely gotten the furthest with Net::WebSocket::Server -- but every time I start the event loop to listen for ZMQ messages, the thread effectively blocks. If I put it in the "on" "ready" section of the websocket connection, it actually works, with events going out to the browser, but the server is unable to handle additional connections and I can't handle disconnect/clean up. It could be that I'm just missing something simple, but at this point I'm suspecting that I'm missing something bigger.