[Rails] How to avoid simple race conditions with Session?

Here is the situation:
- the client makes a request
- it is followed by AJAX polling

The server needs to keep track of some stuff during this process.

I have been using the Session and it "mostly" works… until the user
decides to open another tab in her browser and she makes a new,
parallel request. In this case, the data from the two requests is
merged, which leads to bugs.

This got discussed quite a bit several years back, but I could not
find any recent "recommended" solution to handle this. Does it exist?

I read in this article (http://stackoverflow.com/questions/7570255/
rails-store-unique-data-for-each-open-tab-window) that an option could
be to prefix the URLs, but it seems quite complicated to me.


Thanks a lot!
PJ

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