SockJS - NodeJS showcase - Dec 2011

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SockJS WebSocket emulation kept simple, stupid Marek Majkowski marek@rabbitmq.com

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HTTP WebSockets

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WebSockets hixie-75 4 5.0.0 hixie-76 4 (disabled) 6 5.0.1 11 (disabled) hybi-07 6 hybi-10 7 14 10-dev hybi-17 16-dev

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@sockjs github.com/sockjs

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History of Comet Fallbacks JSO N P Forever IFram e AJAX multipart EventSource W ebSocket postM essage Orbited Socket.io SockJS AJAX polling AJAX CO RS 2005 2007 2009 2006 2010 2011 2008

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Orbited

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Socket.io

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Socket.io

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Socket.io cross domain Opera IE8, IE9 WebSockets - - Flash Socket ? ? AJAX CORS - ~ Forever IFrame - - JSONP + +

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postMessage

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SockJS cross domain Opera IE8, IE9 WebSockets - - Flash Socket ? ? postMessage + AJAX CORS + + postMessage + Forever IFrame + + JSONP + +

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#sockjs SockJS 1. Fallbacks 2. Cross domain support 3. Scalability explained (sticky sessions) 4. Speciﬁed protocol, multilingual 5. WebSocket like API

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History of Comet Fallbacks JSO N P Forever IFram e AJAX multipart EventSource W ebSocket postM essage Orbited Socket.io SockJS AJAX polling AJAX CO RS 2005 2007 2009 2006 2010 2011 2008 W ebSocket WebSocket ????