Passport-Google-Auth

Passport strategies for authenticating with Google using OAuth 2.0.

Lead Maintainer: David Pate

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

Install

npm install passport-google-auth

Usage

Configure Strategy

The Google authentication strategy authenticates users using a Google 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 a client ID, client secret, and callback URL.

var passport = require('passport'),
    GoogleStrategy = require('passport-google-auth').Strategy;
 
passport.use(new GoogleOAuth2Strategy({
    clientId: '123-456-789',
    clientSecret: 'shhh-its-a-secret',
    callbackURL: 'https://www.example.com/auth/example/callback'
  },
  function(accessToken, refreshToken, profile, done) {
    User.findOrCreate(..., function (err, user) {
      done(err, user);
    });
  }
));

If the passReqToCallback options is passed and it is true, then the verify callback signature will look like the following instead.

var passport = require('passport'),
    GoogleStrategy = require('passport-google-auth').Strategy;
 
passport.use(new GoogleOAuth2Strategy({
    clientId: '123-456-789',
    clientSecret: 'shhh-its-a-secret',
    callbackURL: 'https://www.example.com/auth/example/callback'
  },
  function(req, accessToken, refreshToken, profile, done) {
    User.findOrCreate(..., function (err, user) {
      done(err, user);
    });
  }
));

Options

The Strategy can be configured with the following options.

• clientId String identifies the client to the service provider Required
• clientSecret String secret used to establish ownershup of the client identifier Required
• callbackURL String URL to which the service provider will redirect the user after obtaining authorization. Required
• accessType String Type of access to be requested from the service provider. Can be online (default) or offline (gets refresh_token) Optional
• scope String or Array representing the permission scopes to request access to. (default: https://www.googleapis.com/auth/userinfo.email) Optional
• skipUserProfile Boolean If set to false, profile information will be retrieved from Google+. (default: true) Optional
• passReqToCallback Boolean When true, req is the first argument to the verify callback (default: false)

Authenticate Requests

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

For example, as route middleware in an Express application:

var express = require('express'),
    app = express();
 
app.get('/login', passport.authenticate('google'));
 
app.get('/auth/callback/google', 
    passport.authenticate('google', { failureRedirect: '/login' }),
    function(req, res) {
        // Successful authentication, redirect to your app.
        res.redirect('/');
    }
);

Testing

This repository uses Mocha as its test runner. Tests can be run by executing the following command:

npm test

This will run all tests and report on their success/failure in the console, additionally it will include our Code Coverage.

Code Coverage

This repository uses Istanbul as its code coverage tool. Code Coverage will be calculated when executing the following command:

npm test

This will report the Code Coverage to the console similar to the following:

=============================== Coverage summary ===============================
Statements   : 78.07% ( 356/456 )
Branches     : 50.23% ( 107/213 )
Functions    : 74.77% ( 83/111 )
Lines        : 78.07% ( 356/456 )
================================================================================

Additionally, an interactive HTML report will be generated in ./coverage/lcov-report/index.html which allows browsing the coverage by file.

Code Style

This repository uses JSHint for static analysis, JavaScript Code Style for validating code style, JSInspect to detect code duplication, Buddy.js to detect the use of Magic Numbers, and Node Security Project for detecting potential security threats with our dependencies. Code inspections are run as part of standard testing, to re-evaluate them simply run:

npm test

License

MIT

Copyright

Copyright (c) 2014 Riptide Software Inc.