Obtain a list of active sessions

[Jacob Beard]

Hi,

I'm building a web app with express, and I'm trying to figure out how I can obtain a list of active sessions. Do I need to maintain this list myself (e.g. updating an in-memory data structure on user login and logout), or does express keep track of it? Are there any third-party modules that would handle this for me?

Jake

[Paul Vencill]

Officially it depends on which Store you use for your session.  MemoryStore includes a 'all' method that fetches them for you:

https://github.com/expressjs/session/blob/master/session/memory.js

but MongoStore does not.  In that case, though, you could just query the DB for the collection that holds the sessions.  I don't think it's a common use case to actually enumerate the active sessions.  If you just want a count, then most of them seem to follow the "recommendation" and implement a length method.

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[Jacob Beard]

Thanks for the reply. I'm using RedisStore. I guess I could query Redis.

[Jacob Beard]

Ultimately, what I am trying to do is prevent a user account from being used to log in multiple times. The way I was considering implementing this was as follows: on user login attempt, check all active sessions to see if there exists a session for that user account, and if there does, then reject that login attempt. Does this seem sensible?

Jake

On Sunday, March 9, 2014 1:20:19 AM UTC-5, Paul wrote: