How to do I find all the users who have given me a specific Facebook extended permission?

Question

I have requested the email extended permission for my Facebook application. I want to be able to find out all the users who have given me this permission. Is there a way to query this information through Facebook?

I know I can use users.hasAppPermission with the old rest api to find this for users who are logged in. I need the data for users who are not currently logged into the site or may never come back to the site.

Answer 1

Seems like API allows you to check only current user's permissions.

To check for email permissions you can retrieve email field from a user table through FQL for all your users. If it is not empty - user granted you email permission. As a bonus you collect all emails (that's probably what your goal is at the end anyway). To speed things up you can run queries in batches:

select uid, email from user where uid in (1,2,..,1000)
                                      ...(1001,..,2000)
                                      ...

(this assumes that you have offline_access permission)

Answer 2

This is not possible with Facebook currently without offline access to the users data.