How does Gmail do comet on Opera?
GMail uses BrowserChannel (Docs | Source), which is included in Google's Closure Library.
- @fileoverview Definition of the BrowserChannel class. A BrowserChannel
- simulates a bidirectional socket over HTTP. It is the basis of the
- Gmail Chat IM connections to the server.
I really don't have any idea on what the answer is. But I know Opera supports server-events : http://my.opera.com/WebApplications/blog/show.dml/438711 . Maybe it's a step towards the anwser?I'm not really sure either, but I think they use it within Opera Unite.
I think that rather cross-browser (including Opera) approach might be to stream data through an Adobe Flash application. Though it would introduce dependence on the Flash plugin and is not very popular because of that.