Facebook access token expiration how to get extended? perl desktop app -

Facebook access token expiration how to get extended? perl desktop app -

i made perl script facebook doesn't work after period of time, or if log out. think due access token expiring.

could help me extend expiration of token?

first, here

and can find similar:

https://graph.facebook.com/oauth/access_token? client_id=app_id& client_secret=app_secret& grant_type=fb_exchange_token& fb_exchange_token=existing_access_token

it homecoming token.

but! sure, phone call method twice. first time homecoming 2h expiring token. not sure this.

facebook perl facebook-graph-api oauth-2.0 facebook-oauth