From a2f3684cecb361db2bf5f7ec0b6de0603868ffd5 Mon Sep 17 00:00:00 2001 From: Yehuda Katz + Carl Lerche Date: Mon, 11 May 2009 10:57:59 -0700 Subject: Ported fresh_when into a ConditionalGet module --- .../action_controller/new_base/conditional_get.rb | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 actionpack/lib/action_controller/new_base/conditional_get.rb (limited to 'actionpack/lib/action_controller/new_base/conditional_get.rb') diff --git a/actionpack/lib/action_controller/new_base/conditional_get.rb b/actionpack/lib/action_controller/new_base/conditional_get.rb new file mode 100644 index 0000000000..16104c51fc --- /dev/null +++ b/actionpack/lib/action_controller/new_base/conditional_get.rb @@ -0,0 +1,42 @@ +module ActionController + module ConditionalGet + + # Sets the etag, last_modified, or both on the response and renders a + # "304 Not Modified" response if the request is already fresh. + # + # Parameters: + # * :etag + # * :last_modified + # * :public By default the Cache-Control header is private, set this to true if you want your application to be cachable by other devices (proxy caches). + # + # Example: + # + # def show + # @article = Article.find(params[:id]) + # fresh_when(:etag => @article, :last_modified => @article.created_at.utc, :public => true) + # end + # + # This will render the show template if the request isn't sending a matching etag or + # If-Modified-Since header and just a "304 Not Modified" response if there's a match. + # + def fresh_when(options) + options.assert_valid_keys(:etag, :last_modified, :public) + + response.etag = options[:etag] if options[:etag] + response.last_modified = options[:last_modified] if options[:last_modified] + + if options[:public] + cache_control = response.headers["Cache-Control"].split(",").map {|k| k.strip } + cache_control.delete("private") + cache_control.delete("no-cache") + cache_control << "public" + response.headers["Cache-Control"] = cache_control.join(', ') + end + + if request.fresh?(response) + head :not_modified + end + end + + end +end \ No newline at end of file -- cgit v1.2.3