passport-google-plus

Passport strategy for using G+ Sign-In

npm install passport-google-plus
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Passport-Google-Plus

Passport strategies for authenticating with the Google+ Sign-In button.

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

Install

$ npm install passport-google-plus

Usage for Web Server-Side Flow

Configure Strategy

The strategy accepts a callback which is called after the user has been authenticated. The profile and OAuth credentials can be saved or mapped to a user record.

var GooglePlusStrategy = require('passport-google-plus');

passport.use(new GooglePlusStrategy({
    clientId: 'YOUR_CLIENT_ID',
    clientSecret: 'YOUR_CLIENT_SECRET'
  },
  function(tokens, profile, done) {
    // Create or update user, call done() when complete...
    done(null, profile, tokens);s
  }
));

Configure Google+ Sign-In Button

<!-- Add where you want your sign-in button to render -->
<div id="signinButton">
  <span class="g-signin"
    data-scope="https://www.googleapis.com/auth/plus.login"
    data-clientid="YOUR_CLIENT_ID"
    data-redirecturi="postmessage"
    data-accesstype="offline"
    data-cookiepolicy="single_host_origin"
    data-callback="signInCallback">
  </span>
</div>
<div id="result"></div>

Handle the callback & forward the authorization code

function signInCallback(authResult) {
  if (authResult.code) {
    $.post('/auth/google/callback', { code: authResult.code})
    .done(function(data) {
      $('#signinButton').hide();
    }); 
  } else if (authResult.error) {
    console.log('There was an error: ' + authResult.error);
  }
};

Authenticate Requests

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

For example, as route middleware in an Express application:

app.get('/auth/google/callback', passport.authenticate('google'), function(req, res) {
    // Return user back to client
    res.send(req.user);
});

Usage for Web Client-Side Flow

Client-side flows are also supported for web & mobile using ID tokens. When using ID tokens, profile data is limited to public information.

Configure Strategy

The strategy accepts a callback which is called after the user has been authenticated. The profile and OAuth credentials can be saved or mapped to a user record.

var GooglePlusStrategy = require('passport-google-plus');

passport.use(new GooglePlusStrategy({
    clientId: 'YOUR_CLIENT_ID',
    apiKey: 'YOUR_API_KEY'
  },
  function(tokens, profile, done) {
    // Create or update user, call done() when complete...
    done(null, profile, tokens);s
  }
));

Configure Google+ Sign-In Button

<!-- Add where you want your sign-in button to render -->
<div id="signinButton">
  <span class="g-signin"
    data-scope="https://www.googleapis.com/auth/plus.login"
    data-clientid="YOUR_CLIENT_ID"
    data-redirecturi="postmessage"
    data-accesstype="online"
    data-cookiepolicy="single_host_origin"
    data-callback="signInCallback">
  </span>
</div>
<div id="result"></div>

Handle the callback & forward the identity token

function signInCallback(authResult) {
  if (authResult.code) {
    $.post('/auth/google/callback', { id_token: authResult.id_token})
    .done(function(data) {
      $('#signinButton').hide();
    }); 
  } else if (authResult.error) {
    console.log('There was an error: ' + authResult.error);
  }
};
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