module ActionController::Caching::Pages::ClassMethods

caches_page :image, :gzip => false
# don't gzip images

caches_page :index, :if => Proc.new { |c| !c.request.format.json? }
# cache the index action except for JSON requests

caches_page :index
# cache the index action

Usage:

You can also pass a :gzip option to override the class configuration one.

matches the triggering url.
the cache in a path within the page_cache_directory that
Caches the +actions+ using the page-caching approach that'll store

def caches_page(*actions)
  return unless perform_caching
  options = actions.extract_options!
  gzip_level = options.fetch(:gzip, page_cache_compression)
  gzip_level = case gzip_level
  when Symbol
    Zlib.const_get(gzip_level.to_s.upcase)
  when Fixnum
    gzip_level
  when false
    nil
  else
    Zlib::BEST_COMPRESSION
  end
  after_filter({:only => actions}.merge(options)) do |c|
    c.cache_page(nil, nil, gzip_level)
  end
end