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Ok, I am looking to implement COMET, and I stumbled on this page comparing the various options:
http://cometdaily.com/maturity.html
Under the “Transports”, they are using this term “Callback-Polling” – what is callback polling? I know what is normal polling, and long polling, but what is callback polling?
So once you’ve established a connection with a server with a simple ajax-request, server can make a fast response and close connection.
And the idea of commet is on not closing this connection and sending data through it. This data could be a javascript that would be evaluated on the client side.
Also it could be a javascript that will open new connection when the time comes. And a think this is a callback polling – when pooling from the client is initiated on the server side.