Google OAuth 2 authorization - Error: redirect_uri_mismatch

Question

On the website https://code.google.com/apis/console I have registered my application, set up generated Client ID: and Client Secret to my a

Answer 1

Rails users (from the omniauth-google-oauth2 docs):

Fixing Protocol Mismatch for redirect_uri in Rails

Just set the full_host in OmniAuth based on the Rails.env.

# config/initializers/omniauth.rb

OmniAuth.config.full_host = Rails.env.production? ? 'https://domain.com' : 'http://localhost:3000'

REMEMBER: Do not include the trailing "/"