[robmueller]

SSE is great. We wrote about it in quite a bit of detail a while back.

http://blog.fastmail.fm/2012/01/09/building-the-new-ajax-mai...

There's a couple of annoying caveats

1. The "retry" nature of the connection isn't quite as reliable as suggested. See the blog post above for more details

2. NAT timeouts. Make sure you have some sort of "ping" either at application or TCP level.

http://blog.fastmail.fm/2013/05/28/push-events-nat-tcp-conne... http://blog.fastmail.fm/2011/06/28/http-keep-alive-connectio...

3. Each SSE connection is regarded as a regular site connection. So if people open up 6 tabs to your site, you might suddenly find your site is unresponsive to users because every available connection is used by an SSE connection. You might need to implement some inter-tab communication system instead.

http://blog.fastmail.fm/2012/11/26/inter-tab-communication-u...