is there any way we can post image on facebook using facebook app on access allowed user's wall on be half them/app endless?

is there any way we can post image on facebook using facebook app on access allowed user's wall on be half them/app ?

We have this to get access of user for a one time and then whatever user upload will automatically post to their post wall.

We have tried this by storing the user access token but it is expire after 2 month.So if is there any option to generate no expire token then it would also work.