def current_user_url   # store last url
    if (request.fullpath != "/users/sign_in?locale=*" &&
        request.fullpath != "/users/sign_up?locale=*" &&
        request.fullpath != "/users/password?locale=*" &&
        request.fullpath != "/users/sign_out?locale=*" &&
        request.fullpath != "/users?locale=*" &&
        !request.xhr?) # don't store ajax calls
      session[:previous_url] = request.fullpath
    end
  end

def after_sign_in_path_for(resource)
  session[:previous_url] || session[:confirm_url]
end

if (request.fullpath[%r{A/users/sign_in?locale=.*z}] &&
  ...