当在rails中按下浏览器的后退按钮时，在注销后进入登录页面

Question

I have observe Facebook and Gmail that when we logged out it redirects us to the login page, but the interesting is that when we hit back button it still not go to inbox page.
I have search in google and got something to set attribute "Cache-control" in header. But I don't know how can we implement this mechanism in Rails.
Can anybody suggest me how to do that?
My Rails version is 3.0.6 with Ruby1.9.2

Answer 1

You want to set the headers of your page to prevent caching

before_filter :set_cache_buster

  def set_cache_buster
    response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"
    response.headers["Pragma"] = "no-cache"
    response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"
  end