Can I renew facebook token automatically?

Question

I am working on collaborative web platform by ruby on rails and it's connected with facebook app (v2) by Koala gem..

When a user register by facebook account, there is facebook token (expire after 60 days)

The questions:

1- when and how renew the token in normal cases?

2- Can I renew token for 60 days again before end validity of the token?

3- Can I renew token automatically when user used his account in app with old session (without new sign in), or the user must sign out and sign in again to renew token?

I show this answer, but the tokens of users doesn't renew automatically when users visit to site with old sessions (without signin), do I have to finish their sessions automatically to force them to sign in again?

Answer 1

1 - When the user visits your App again

2 - Afaik you can only refresh them after the old one is not valid anymore. Not entirely sure about that though, as i have never tried.

3 - You can only renew the token with user interaction. if it would be possible to auto-renew, there would be no need for short- and long-living tokens at all.

Btw, renewal is very easy with the JavaScript SDK, by just calling FB.getLoginStatus on page load. In general, try to avoid using Tokens while the user is offline.