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facebook-graph-apifacebook-access-token

What calls are possible using an "app access token"?

I'm just starting to create a in-facebook app. I'm bugging at the first step, when a user access my app for the first time. Basically, I want a welcome page to explain what is that app before requesting an access to information. A cute image with cats, whatever, but not sending directly the user to the login to my app dialog.

So, user didn't sign in to my app, I only have the "app access token" to work with the graph. According to this official Facebook dev page (at the end), I'm supposed to have some basic information access.

Question is : how ? What are the calls that I can make to the graph with an app access token ?

/me is a no go, it requires a user access token.

/$user_id is public information, with or without a token, I can retrieve basic info. But I don't have any user_id to use through the $signedRequest (which gives only country,locale & age)

How am I to get (quote):

- Basic Profile Info of a User (ID, Name, Username, Gender)
- A User’s Friends and their IDs
- Permissions granted by the User to your App
Solution

  • You shouldn't be using your application token for anything other than administration of your app.

    It's not possible to get data before a user actually grants it.

    The paragraph you mentioned is within the limits of your application

    While an App Access Token is largely for the purposes of publishing information back to Facebook on behalf of the user, there is a limited set of information that can be retrieved from Facebook using an App Access Token.

    • Basic Profile Info of a User (ID, Name, Username, Gender)
    • A User’s Friends and their IDs
    • Permissions granted by the User to your App

    Say I know User001 added my app, and I want to check on some items for administration. I don't have User001's access token (or rather I shouldn't be manually using it) So instead I supply the application access token to get data that would normally return

    Friends

    Notice I can supply an app token allowing me to see friends (of the user who added the app) but if I choose an object not mentioned in those bullet points...

    No access