vue-google-oauth2-gapi

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

Forked from https://github.com/guruahn/vue-google-oauth2

Same as fork but allows you to override options and a few other bug fixes.

This package contains Google API script loading before calling that (it was required for my project and I wasn't able to wait for merge my PR into repository forked from)

Installation

``
npm install vue-google-oauth2-gapi
`

Initialization

`javascript
import GAuth from 'vue-google-oauth2-gapi'

Vue.use(GAuth, {clientId: '4XXXXXXXX93-2gqknkvdjfkdfkvb8uja2k65sldsms7qo9.apps.googleusercontent.com', scope: 'profile email https://www.googleapis.com/auth/plus.login'})

`
Ideally you shall place this in your app entry file, e.g. src/main.js

Usage - Sign-in

$3

#### Frontend-side(Vue.js)
`javascript
this.$gAuth.getAuthCode(function (authorizationCode) {
//on success
this.$http.post('http://your-backend-server.com/auth/google', { code: authorizationCode, redirect_uri: 'postmessage' }).then(function (response) {

})
}, function (error) {
//on fail do something
})
`
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.

#### Backend-side(Golang)
`go
auth_code := ac.Code //from front-end side
// generate a config of oauth
conf := &oauth2.Config{
ClientID: "XXXXXXXX",
ClientSecret: "XXXXXXXX",
RedirectURL: "postmessage",
Scopes: []string{
"profile",
"email",
"https://www.googleapis.com/auth/plus.login",
},
Endpoint: "XXXXXX",
}
// exchange to token inclued refresh_token from code
token, err = conf.Exchange(oauth2.NoContext, auth_code)
if err != nil {
sErr := NewStatusErr(401, err.Error(), "Unauthorized")
return nil, &sErr
}
`
Note, `RedirectURL` must be `postmessage`!!

$3


`
this.$gAuth.signIn(function (user) {
//on success do something
console.log('user', user)
}, function (error) {
//on fail do something
})
`

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

Additional Help

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