request.env['omniauth.auth'] is return nil

[rpjuvvadi]

Hi,

I'm trying to add/modify scope & callback_path dynamically using Omniauth Setup Phase.
I am able to do OAuth. But, request.env["omniauth.auth"] is returning nil in Callback.

I launch the OAuth process using /google_auth_callbacks/gmail_auth instead of /auth/google_oauth2

Here's my config,

omniauth.rb

# config/initializers/omniauth.rb
Rails.application.config.middleware.use OmniAuth::Builder do
  provider :google_oauth2, Figaro.env.google_client_id, Figaro.env.google_client_secret, setup: true
end
OmniAuth.config.on_failure = GoogleAuthCallbacksController.action(:failure)

routes.rb

..
..
get 'auth/google_oauth2/setup' => 'google_auth_callbacks#setup'
..

google_auth_callbacks_controller.rb

class GoogleAuthCallbacksController < ApplicationController
  def gmail_auth
    session[:google_auth_scopes] = [ 'https://mail.google.com/', 'userinfo.profile', 'userinfo.email' ]
    session[:google_auth_callback] = "/google_auth_callbacks/gmail_success"
    redirect_to '/auth/google_oauth2'
  end

  def setup
    request.env["omniauth.strategy"].options[:scope]         = session[:google_auth_scopes]
    request.env["omniauth.strategy"].options[:callback_path] = session[:google_auth_callback]
    render plain: "Setup Completed", status: 404
  end


  def gmail_success
    integration = GmailIntegration.where(user_id: current_user.id, flow: :in).first_or_initialize
    auth =  request.env['omniauth.auth'] # here, auth = nil everytime
    .....
  end

end

Gemfile.lock

rails (5.1.4)
omniauth (1.8.1)
omniauth-oauth2 (1.0.2)
omniauth-google-oauth2 (0.2.2)

Help?

[rpjuvvadi]

If it helps,

request.env["action_dispatch.request.unsigned_session_cookie"]

{ "session_id"=>"18f16f976d873bf19cf542e9cd0fe8e7",
  "warden.user.user.key"=>[ ["<SOME_UUID>"],  "$2a$11$QClBu2yQVxCRk5E88NCs7."],
  "_csrf_token"=>"<CSRF_TOKEN>",
  "google_auth_scopes"=>["https://mail.google.com/", "userinfo.profile", "userinfo.email"],
  "google_auth_callback"=>"/google_auth_callbacks/gmail_success",
  "omniauth.params"=>{}}

[zquestz]

I would highly recommend using the default url for auth. Renaming has presented issues for many users. Please test using google_oauth2 and see if the issue persists.