How to get a facebook user id from the login email

问题:

Is there a way to get a user's facebook user id from their login email address?

I want an API call where I can provide [e-mail] and get facebook user id 342255534.

I'll use that id to call http://graph.facebook.com/342255534/picture?type=large

The closest thing I've found is https://graph.facebook.com/search?q=EMAILADDRESS&type=user&access_token=ACCESSTOKEN, but that requires an access token, which I'm hoping to avoid.

I know this isn't how it's supposed to work, but is there a way to get a generic access token?

回答1:

You can use your own access_token for the application, and change it to a long-lived access token so you can make the API call in a cron. The only issue is that you will have to login to the app every so often to update the access token.

UPDATE: The User Search API is now deprecated, so you cannot search using email addresses. But name based searches still work.

回答2:

You can create an app and get an access token for that app. Instructions are here: https://developers.facebook.com/docs/authentication/applications/

Unfortunately, a search for a user_id by email only works with a user access token.

You don't need to be friends with a user to get their id by email address.