Facebook API - User access token with no expiration -

Facebook API - User access token with no expiration -

i read here can non-expiring access token users when calling this:

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 obvious client_id , client_secret heck grant_type , fb_exchange_token?

i managed post user's timeline/pin board access_token used app_id + | + app_secret. worked great.

btw: need permission manage_pages because want add together photos user album.

any ideas these 2 attributes , can them?

grant type(the 3rd parameter) nil string "fb_exchange_token"

and

fb_exchange_token(the 4th parameter) previous access_token has either expired or expire.

so illustration requesting url should :

https://graph.facebook.com/oauth/access_token client_id=783921075894231403 &client_secret=78789230452234235412793042 &grant_type=fb_exchange_token &fb_exchange_token=60as98dg690758a0sd5g57869608s9da8g6sda96g5s9adg

facebook facebook-access-token