What's the technology stack behind Facebook chat?
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Some people say facebook uses XMPP, others say it uses a variant of comet.
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Answer:
The Facebook text chat uses XMPP, although I think the audio/video chat uses another protocol, possibly RSTP. If you are curious about what stacks various websites use, check out http://builtwith.com
Sarah O'Connor at Quora Visit the source
Other answers
The text chat is based on xmpp. Your username for xmpp purposes is different from one used for Web login. It is avaliable in your settings. https://www.facebook.com/sitetour/chat. php For audio/video I believe it's based on Skype.
Punit Kumar Jain
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