passport-facebook

Facebook authentication strategy for Passport.

passport-facebook

Passport strategy for authenticating with Facebook using the OAuth 2.0 API.

This module lets you authenticate using Facebook in your Node.js applications. By plugging into Passport, Facebook authentication can be easily and unobtrusively integrated into any application or framework that supports Connect-style middleware, including Express.

$ npm install passport-facebook

The Facebook authentication strategy authenticates users using a Facebook account and OAuth 2.0 tokens. The strategy requires a verify callback, which accepts these credentials and calls done providing a user, as well as options specifying an app ID, app secret, callback URL, and optionally enabling [appsecret_proof] (https://developers.facebook.com/docs/graph-api/securing-requests#appsecret_proof).

passport.use(new FacebookStrategy({
    clientID: FACEBOOK_APP_ID,
    clientSecret: FACEBOOK_APP_SECRET,
    callbackURL: "http://localhost:3000/auth/facebook/callback",
    enableProof: false
  },
  function(accessToken, refreshToken, profile, done) {
    User.findOrCreate({ facebookId: profile.id }, function (err, user) {
      return done(err, user);
    });
  }
));

Use passport.authenticate(), specifying the 'facebook' strategy, to authenticate requests.

For example, as route middleware in an Express application:

app.get('/auth/facebook',
  passport.authenticate('facebook'));

app.get('/auth/facebook/callback',
  passport.authenticate('facebook', { failureRedirect: '/login' }),
  function(req, res) {
    // Successful authentication, redirect home.
    res.redirect('/');
  });

If you need extended permissions from the user, the permissions can be requested via the scope option to passport.authenticate().

For example, this authorization requests permission to the user's statuses and checkins:

app.get('/auth/facebook',
  passport.authenticate('facebook', { scope: ['user_status', 'user_checkins'] }));

Refer to Facebook's docs

app.get('/auth/facebook',
  passport.authenticate('facebook', { authType: 'rerequest', scope: ['user_status', 'user_checkins'] }));

The display mode with which to render the authorization dialog can be set by specifying the display option. Refer to Facebook's OAuth Dialog documentation for more information.

app.get('/auth/facebook',
  passport.authenticate('facebook', { display: 'touch' }));

Refer to Facebook's Re-authentication

app.get('/auth/facebook',
  passport.authenticate('facebook', { authType: 'reauthenticate', authNonce: 'foo123' }));

The Facebook profile is very rich, and may contain a lot of information. The strategy can be configured with a profileFields parameter which specifies a list of fields (named by Portable Contacts convention) your application needs. For example, to fetch only user's facebook ID, name, and picture, configure strategy like this.

passport.use(new FacebookStrategy({
    // clientID, clientSecret and callbackURL
    profileFields: ['id', 'displayName', 'photos']
  },
  // verify callback
));

If profileFields is not specified, the default fields supplied by Facebook will be parsed.

For a complete, working example, refer to the login example.

Facebook's OAuth 2.0 implementation has a [bug][1] in which the fragment #_=_ is appended to the callback URL. This appears to affect Firefox and Chrome, but not Safari. This fragment can be removed via client-side JavaScript, and @niftylettuce provides a suggested [workaround][2]. Developers are encouraged to direct their complaints to Facebook in an effort to get them to implement a proper fix for this issue. [1]: https://developers.facebook.com/bugs/196125357123225 [2]: https://github.com/jaredhanson/passport-facebook/issues/12#issuecomment-5913711

$ npm install
$ npm test

The MIT License

Copyright (c) 2011-2015 Jared Hanson <http://jaredhanson.net/>