social networking - How to import Facebook friends to website - Stack Overflow: "So your process, from the perspective of the user in any given instance, would be:
Ask the user to Login with Facebook, requesting specific permissions.
Receive those permissions from the user (otherwise the process ends here).
Make back-end Graph API requests from your server code to get the relevant information from the user's Facebook social graph.
Present the user with options that you could make sense of (such as matching email addresses or even names with users you already have), be it users you already have (hey, this Friend of yours is on our site, would you like to say hello?) or invites to your site (we don't have a record of your Friend visiting our site, click here to invite them!), etc."
'via Blog this'
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