Passport-facebook doesn't get email [duplicate]

问题

This question already has an answer here:

Passport-Facebook authentication is not providing email for all Facebook accounts 7 answers

I have already implemented the Facebook-LogIn in my website with express js and passport-Facebook. It works well (I get field profile), but the problem is that I don't get the Email. I get an error:

email   : profile.emails[0].value,

TypeError: Cannot read property '0' of undefined

My code:

passport.use('facebook',new FacebookStrategy({
        clientID            : config.facebook.id,
        clientSecret    : config.facebook.secret,
        callbackURL  : '/auth/facebook/callback',
        profileFields : ['id', 'displayName', 'emails','photos']
    }, function(accessToken, refreshToken, profile, done) {

        User.findOne({provider_id: profile.id}, function(err, user) {
            if(err) throw(err);
            if(!err && user!= null) return done(null, user);

            var user = new User({
                provider_id : profile.id,
                name                 : profile.displayName,
                email               : profile.emails[0].value,
                photo               : profile.photos[0].value,
            });
            user.save(function(err) {
                if(err) throw err;
                return done(null, user);
            });
        });
    }));

It would be great if someone could help me with the solution to my problem :)

回答1:

I had the same problem. We had 10 test users, all 10 had email addresses associated with their Facebook account. But for one of the 10 testers, Facebook did not return the 'email' JSON property in the profile response. I have no idea why, since it looked identical to other Facebook profiles that worked fine.

The fix was to change this line:

passport.authenticate('facebook')

To this:

passport.authenticate('facebook', { scope: [ 'email' ] })

I still can't explain why it worked for 9/10, but not for one. Either way, it's fixed now :-)

回答2:

Try this passport.authenticate('facebook', { scope: [ 'email' ] })

Also add a new field profileFields: [ 'email' , 'name' ] in the facebookStrategy

回答3:

  passport.use(new FacebookStrategy({
    clientID: config.facebook.clientID,
    clientSecret: config.facebook.clientSecret,
    callbackURL: config.facebook.callbackURL,
    passReqToCallback:true
  },

来源：https://stackoverflow.com/questions/25832763/passport-facebook-doesnt-get-email

标签

node.js

facebook-graph-api

express

passport-facebook