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I have an AppEngine application which uses Google Accounts as authentication. What is the approach or idea on seeing if someone is online or using the application? And able to chat to online users.
Thanks.
The official way to implement chat on App Engine is using the Channel API. However, the quotas are strange, and it’s fairly expensive at $0.01/100 connections.
I would recommend using a hosted web socket service like Pusher, or running your own nodejs server on another host.