Prevent user from accessing /auth/:provider under some conditions in OmniAuth

Question

Is there any way to prevent users from accessing /auth/:provider if, say, they are not logged in? I've tried to use before_request_phase callback and Rack::Response to redirect them to sign in page but it haven't worked.

My application is not using omniauth for user authentication. Instead, it is used to connect third-party accounts to the user profile.

Thanks!

Answer 1

OmniAuth.config.before_request_phase = lambda do |env|
  user = env['warden'].authenticate!
end

Answer 2

Ok, the solution I found was to create a new OmniAuth Strategy which inherits from the one I wanted to use and to override the request_phase method. Could not get the same behaviour using only OmniAuth configs in its initializer.

def request_phase
  if env['rack.session']['warden.user.user.key'].present?
    super
  else
    redirect '/'
  end
end