Uncacheable web pages in Rails

In an attempt to ensure that a page is always fetched from the server I needed to add the following code to my base controller. Seems to be a bit long-winded but does the job.

class ApplicationController < ActionController::Base
before\_filter :force\_no\_cache

def force\_no\_cache
\# set modify date to current timestamp
response.headers\[Last-Modified\] = CGI::rfc1123\_date(Time.now)

\# set expiry to back in the past
\# (makes us a bad candidate for caching)
response.headers\[Expires\] = 0

\# HTTP 1.0 (disable caching)
response.headers\[Pragma\] = no-cache

\# HTTP 1.1 (disable caching of any kind)
\# HTTP 1.1 ‘pre-check=0, post-check=0’ (IE specific)
response.headers\[Cache-Control\] =
no-cache, no-store, must-revalidate, pre-check=0, post-check=0