Infinite loop occurred while connecting to the passport-google-oauth2 for "Sign in with Google".

[TENSHKUMAR-KKT-2004]

issue :

 when i go to the google oauth to sign-in to my app it will loading infinite time .

solution :

  1.create a separate file for create a passport strategy for google oauth 

example code :

   create a file : oauth.js

            // required packages for oauth
           const passport = require('passport')
           const GoogleStrategy = require('passport-google-oauth2').Strategy

           const User = require('./models/userSchema.js')
           // passport-local config

           // create a user strategy for a mongodb
           passport.use(User.createStrategy())

           // config for google oauth
           passport.use(new GoogleStrategy({
               clientID: "process.env.CLIENT_ID",
               clientSecret: "process.env.CLIENT_SECRET",
               callbackURL: "https://localhost:8888/auth/google/secrets"
             },
             (request, accessToken, refreshToken, profile, done)=> {
                 done(null, profile)
             }
           ))

           // Used to stuff a piece of information into a cookie
           passport.serializeUser((user, done) => {
               done(null, user)
           })

           // Used to decode the received cookie and persist session
           passport.deserializeUser((user, done) => {
               done(null, user)
           })

2. inside app.js we need to require first.

inside app.js

                     require('./oauth.js')

In case, if you've written the function this way

inside app.js

           app.get('/auth/google', (req, res) => {
             passport.authenticate('google', {
               scope: ['profile', 'email']
             })
           })

it not work for us because it is a our server side request and response.

so we need to convert the code like this.

 inside app.js 

           app.get('/auth/google', 
             passport.authenticate('google', {
               scope: ['profile', 'email']
             })              
           )

now this get request will trigger to oauth google login/sign-in site without any error.

[dvijkalsi]

We don't really need create a separate oauth.js, what was causing my issue was that I wrote this inside app.js

           app.get('/auth/google', (req, res) => {
             passport.authenticate('google', {
               scope: ['profile', 'email']
             })
           })``

instead when I used this in app.js it started working

           app.get('/auth/google', 
             passport.authenticate('google', {
               scope: ['profile', 'email']
             })              
           )

[GGLVXD]

cool but i want to kms