Facebook Login is returning 'Undefined' Fields in user profile and it doesn't return email. MEANJs + Passport-facebook - facebook

Question

I am using Meanjs.org boilerplate and Facebook Signup returns me to the Signup page.
Following are the steps that I have taken so far.
1) Setting up the Facebook App Site URL
http://localhost:3000/
and the callback URI of OAuth
http://localhost:3000/auth/facebook/callback
2) Placing the APP_ID and APP_Secret in as Client_ID and Client_Secret
facebook: {
clientID: process.env.FACEBOOK_ID || '*****',
clientSecret: process.env.FACEBOOK_SECRET || '*****',
callbackURL: 'http://localhost:3000/auth/facebook/callback',
profileFields: ['id','emails', 'first_name', 'last_name', 'displayName', 'link', 'about_me', 'photos' ]
},
3) Code is as follows
--Routes
// Setting the facebook oauth routes
app.route('/auth/facebook').get(passport.authenticate('facebook', {
scope: ['email']
}));
app.route('/auth/facebook/callback').get(users.oauthCallback('facebook'));
-- The oauthCallback function,
exports.oauthCallback = function(strategy) {
return function(req, res, next) {
passport.authenticate(strategy, function(err, user, redirectURL) {
if (err || !user) {
console.log('1' + err);
//console.log(user);
return res.redirect('/#!/signin');
}
req.login(user, function(err) {
if (err) {
console.log('2' + err);
return res.redirect('/#!/signin');
}
return res.redirect(redirectURL || '/');
});
})(req, res, next);
};
};
-- Passport-Facebook Strategy
module.exports = function() {
// Use facebook strategy
passport.use(new FacebookStrategy({
clientID: config.facebook.clientID,
clientSecret: config.facebook.clientSecret,
callbackURL: config.facebook.callbackURL,
passReqToCallback: true
},
function(req, accessToken, refreshToken, profile, done) {
console.log('facebook Strategy Started');
// Set the provider data and include tokens
var providerData = profile._json;
providerData.accessToken = accessToken;
providerData.refreshToken = refreshToken;
// console.log(JSON.stringify(profile));
console.log(profile);
// console.log(JSON.stringify(profile.name.givenName));
// Create the user OAuth profile
var providerUserProfile = {
firstName: profile.name.givenName,
lastName: profile.name.familyName,
displayName: profile.displayName,
email: profile.emails[0].value,
username: profile.username,
provider: 'facebook',
providerIdentifierField: 'id',
providerData: providerData
};
//console.log('provider' + providerUserProfile);
// Save the user OAuth profile
users.saveOAuthUserProfile(req, providerUserProfile, done);
}
));
};
4) Debugging
Logging err under oauthCallback function returns the following,
1TypeError: Cannot read property '0' of undefined
What Facebook returns as profile in Passport-Facebook module is as follows,
{ id: 'Id_of_the_person',
username: undefined,
displayName: 'Full_name_of_person',
name:
{ familyName: undefined,
givenName: undefined,
middleName: undefined },
gender: undefined,
profileUrl: undefined,
provider: 'facebook',
_raw: '{"name":"Full_name_of_person","id":"Id_of_the_person"}',
_json:
{ name: 'Id_of_the_person',
id: 'Id_of_the_person',
accessToken: 'access_token_value',
refreshToken: undefined } }
Can anyone be kind to guide me about getting the correct user profile from Facebook including user email?
Thank you so much.

Answer 1

I have my profile fields set to the following
profileFields: ['email','id', 'first_name', 'gender', 'last_name', 'picture']
Even though you set email it might return emails if the user has multiple emails. So you need to check if email was returned profile.email or profile.emails[0].value. You must also check if it is undefined, because there is people that register with facebook that never verify their email account and there is people that sign up with a phone number, in both those cases their emails will always be undefined.
you want to check that any required fields have values.
var email = profile.email || profile.emails[0].value;
if (! email){
console.log('this user has no email in his FB');
var err = {message:'this user is missing an email'};
return done(err);
}
now i can do this if they have an email
newUser.facebook.email = email;
if they don't have an email you can set a session for profile and send them to a page that asks them to enter an email.
It sounds like a pain, but you can never trust information from a third party api to have values.
Most of the passport examples I've seen online are wrong. They all assume an email is present.

Answer 2

First, profileFields field does not obey to Portable Contacts convention - and you can find the convention for passportjs here.
Second, in your example, after removing removed 'about_me', the Facebook signup returns no error. Before removing 'about_me', I had a different error: Tried accessing nonexisting field (about_me) on node type (User)
If the error persist, see this serie of 5 tutorials which helps me when I was doing the sign up page to authenticate with social networks accounts.