From the Requests Dialog document:
Graph API
To retrieve a single User ID from a single Request ID using the Graph API, issue an HTTP GET request开发者_JAVA技巧 to therequest_id
:https://graph.facebook.com/[request_id]?access_token=USER_ACCESS_TOKEN
Is this request available through FQL?
Yes this is available via the apprequest fql table:
SELECT request_id, app_id, recipient_uid, sender_uid
FROM apprequest
WHERE request_id = 10150308414012941
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