Is this an inactivity timeout?  If so, you could perform an interaction
with the back end every time the user interacts with you, even if the
user's interaction doesn't require it, thereby extending the timeout just
as though the user was working directly.

Just performing an interaction periodicly to extend the timeout, despite
the lack of a user interaction, would be circumventing the back end's
security policy, not to be done lightly.  But accepting AJAX indications
that the user is actively paging through the data (detecting scrolling in
JavaScript, for example, or responding to a popup that says timeout is
coming) as a reason to perform a timeout extending interaction probably
doesn't violate the back end's policy.

If, instead, the timeout happens whether or not there has been recent
interaction, then it would be best to consider frequent re-authentication
to be the back end's policy, and pass that burden on to the user.

As far as managing the back end cookie goes, store it on the user's session
object.  Update it when it changes )or when it is handed to you, whether or
not it differs, the change is low cost).  There is no need to send it on to
the user's browser, which already gets the Django session key.

See:

  https://docs.djangoproject.com/en/dev/topics/http/sessions/


On Wed, Jul 31, 2013 at 8:29 AM, <br...@brunomcustodio.com> wrote:

> I'm using Django to build a *frontend* application which will fetch data
> from a remote (RESTful, for the matter) API for presentation to users that
> can authenticate within the API. This API will, upon every successful
> login, output a *cookie* which I will need to use in further requests,
> and to this *cookie* will correspond a given (session) timeout (so that I
> will need to login again within the API to generate a new *cookie*). I
> was advised to stay away from storing usernames and passwords myself on the
> *frontend* side of the matters, so now I need to figure out how can I
> store this *cookie* upon and associate it with a *browser* session so
> that I can know if a given user is "authenticated" in view code. How do I
> go about accomplishing this?
>
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