verify_return_to_base (OpenID::Consumer::IdResHandler)

    # File lib/openid/consumer/idres.rb, line 190
          def verify_return_to_base(msg_return_to)
            begin
              app_parsed = URI.parse(URINorm::urinorm(@current_url))
            rescue URI::InvalidURIError
              raise ProtocolError, "current_url is not a valid URI: #{@current_url}"
            end

            [:scheme, :host, :port, :path].each do |meth|
              if msg_return_to.send(meth) != app_parsed.send(meth)
                raise ProtocolError, "return_to #{meth.to_s} does not match"
              end
            end
          end