A tutorial on setting up authentication using Passport.
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loopback-example-passport

A tutorial for setting up a basic passport example.

Overview

LoopBack example for loopback-passport module. It demonstrates how to use LoopBack’s user/userIdentity/userCredential models and passport to interact with other auth providers.

  • Log in or sign up to LoopBack using third party providers (aka social logins)
  • Link third party accounts with a LoopBack user (for example, a LoopBack user can have associated facebook/google accounts to retrieve pictures).

Prerequisites

Before starting this tutorial, make sure you have the following installed:

Client ids/secrets from third party

Tutorial - Facebook

1. Clone the application

$ git clone git@github.com:strongloop/loopback-example-passport.git
$ cd loopback-example-passport
$ npm install

2. Get your client ids/secrets from third party(social logins)

  • To get your app info: facebook
  • Click on My Apps, then on Add a new App
  • Pick the platform [iOS, Android, Facebook Canvas, Website]
  • Select proper category for your app.
  • Write your app name and “Site URL”.
  • Skip the quick start to get your “App ID” and “App Secret”, which is in “Settings”
  • Your app may not work if the settings are missing a contact email and/or “Site URL”.
  • if you are testing locally, you can simply use localhost:[port#] as your “Site URL”.

3. Create providers.json

  • Copy providers.json.template to providers.json
  • Update providers.json with your own values for clientID/clientSecret.

    "facebook-login": {
      "provider": "facebook",
      "module": "passport-facebook",
      "clientID": "xxxxxxxxxxxxxxx",
      "clientSecret": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "callbackURL": "/auth/facebook/callback",
      "authPath": "/auth/facebook",
      "callbackPath": "/auth/facebook/callback",
      "successRedirect": "/auth/account",
      "failureRedirect": "/login",
      "scope": ["email"],
      "failureFlash": true
    },
    "facebook-link": {
      "provider": "facebook",
      "module": "passport-facebook",
      "clientID": "xxxxxxxxxxxxxxx",
      "clientSecret": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "callbackURL": "/link/facebook/callback",
      "authPath": "/link/facebook",
      "callbackPath": "/link/facebook/callback",
      "successRedirect": "/auth/account",
      "failureRedirect": "/login",
      "scope": ["email", "user_likes"],
      "link": true,
      "failureFlash": true
    }
    

4. Facebook profile info

In a recent update, Facebook no longer returns all fields by default (email, gender, timezone, etc). If you need more information, modify the providers template.

The current template contains:

"profileFields": ["gender", "link", "locale", "name", "timezone", "verified", "email", "updated_time"],

We recommend modifying the fields to suit your needs. For more information regarding the providers template, see http://loopback.io/doc/en/lb2/Configuring-providers.json.html.

5. Data file

  • If you need to see your account info for testing purposes, in server\datasources.json, add:
"file":"db.json"

after

"connector": "memory",
  • The account info will be saved into this file.

6. Run the application

$ node .
  • Open your browser to http://localhost:3000
  • Click on ‘Login with Facebook’.
  • Sign up using a local account, then link to your Facebook account.

More LoopBack examples