if you constrain on protocol and want to redirect to fix if someone hits http instead of https, use this.

routes.rb

Rails::Application.routes.draw do
  ...


  SecureTheRoute = lambda do |env|
    request = ActionDispatch::Request.new(env)
    dest = "http#{request.ssl? ? '' : 's'}://" + request.host_with_port + request.fullpath
    begin
      Profounder::Application.routes.recognize_path(dest)
      [301, {'Location' => dest}, ["Redirecting to #{dest}"]]
    rescue ActionController::RoutingError
      [404, {"Content-Type" => 'text/html'}, [File.read(Rails.root.join('public', '404.html'))]]
    end
  end
  match '(*path)' => SecureTheRoute
end