Django Websocket
There are resources and possibly implementations of scalable solution for long time requests and server pushing etc.
Actualy I have integrated horizon's Implementation from realtime communication blueprint, but i think that this solution is not universal solution for all cases.
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- http://www.aeracode.org/2016/1/3/laying-channels-groundwork/
- https://blueprints.launchpad.net/horizon/+spec/realtime-communication