Is Opa using AJAX or Websockets? I’m guessing it would be the former. What if I want to use websockets instead of AJAX? Or is it similar to socket.io for Javascript – if the browser supports Websockets it uses them, otherwise it falls back to AJAX & Flash sockets.
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OPA doesn’t currently support websockets.
But it’s something we considere again, since firefox 6 brings back support for websockets and a fix is proposed for the previous big security issue.