open_id_authentication_fix.rb

# This code fixes the error:
# undefined method `relative_url_root' for SessionsController:Class

def requested_url
  relative_url_root = self.class.respond_to?(:relative_url_root) ? self.class.relative_url_root.to_s : request.relative_url_root
  "#{request.protocol + request.host_with_port + relative_url_root + request.path}"
end