Facebook提供一页(或应用)的透视。
You have two ways to access it: the Insights object or the Insights fql table.
Using that you can load statistics about your page using specific metrics, in the fql table doc. the ones that you care about (based on your question) starts in Page Posts and then you have Stories and People talking about this, Impressions and Engagement.
根据fql表c:
阅读你需要的见解
本届会议所有用户的浏览量
这就意味着,你每天只能开一个节目收集这一数据,因为你需要一个积极的信号,让用户能够查阅网页上的见解数据,并批准你的供述,并给予“阅读”许可。
You can make sure that the user use your app while you authenticate him using the Server-Side auth flow, which will results in 60 days token, save that and you can run that program daily for the next 60 days.
When the token has expired the user will have to again use your app to authenticate and create a new valid token.