Is it possible to do Server -> Facebook authentication?

My quick investigations appear to suggest that FB has deprecated all auth mechanisms while leaving their custom oauth implementation.

Can som开发者_如何转开发eone comment or clarify this statement ?

Why ?

• I want users to authenticate against my app and not FB
• At some later stage i wish to grab some assets from FB such as the current users photo etc.

You will need at least once to let them authenticate with the facebook ID and authorize your app. From that moment, you will receive an access_token in the JSON response that will allow you to perform operations for your user.

There are two types of access tokens:

• Session based: expires in a short term, are used when the user will be logged to FB every time you need to perform an operation.
• Offline access: do not expire and allow the app to perform operations for the user in any moment. This requires the offline_access permission when the app is authorized.

Check here: http://developers.facebook.com/docs/authentication/ for the oauth mechanism and here: http://developers.facebook.com/docs/authentication/permissions/ for the permissions list.