vue-google-auth

Handling Google sign-in and sign-out for Vue.js applications

Installation

``
npm install vue-google-auth
`

Initialization

`
import GoogleAuth from 'vue-google-auth'

Vue.use(GoogleAuth, { client_id: 'xxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com' }, [scope='plus.login'])
Vue.googleAuth().load()
`
Ideally you shall place this in your app entry file, e.g. src/main.js

Usage - Sign-in


###(a) Handling Google sign-in, getting the one-time authorization code from Google
`
import Vue from 'vue'

Vue.googleAuth().signIn(function (authorizationCode) {

// things to do when sign-in succeeds

// You can send the authorizationCode to your backend server for further processing, for example
this.$http.post('http://your/backend/server', { code: authorizationCode, redirect_uri: 'postmessage' }).then(function (response) {
if (response.body) {
// ...
}
}, function (error) {
console.log(error)
})

}, function (error) {
// things to do when sign-in fails
))
`

The authorizationCode that is being returned is the one-time code that you can send to your backend server, so that the server can exchange for its own access token and refresh token.


###(b) Alternatively, if you would like to directly get back the access_token and id_token
`
import Vue from 'vue'

// Just add in this line
Vue.googleAuth().directAccess()

Vue.googleAuth().signIn(function (googleUser) {
// things to do when sign-in succeeds
}, function (error) {
// things to do when sign-in fails
))
`

The googleUser object that is being returned will be:
`
{
"token_type": "Bearer",
"access_token": "xxx",
"scope": "xxx",
"login_hint": "xxx",
"expires_in": 3600,
"id_token": "xxx",
"session_state": {
"extraQueryParams": {
"authuser": "0"
}
},
"first_issued_at": 1234567891011,
"expires_at": 1234567891011,
"idpId": "google"
}
`

Usage - Sign-out


Handling Google sign-out
`
import Vue from 'vue'

Vue.googleAuth().signOut(function () {
// things to do when sign-out succeeds
}, function (error) {
// things to do when sign-out fails
))
``

Additional Help

Scopes:
https://developers.google.com/gmail/api/auth/scopes

Do refer to this sample login page HTML file.

If you are curious of how the entire Google sign-in flow works, please refer to the diagram below
!Google Sign-in Flow