My Ruby on Rails application uses the following controller code to generate a sitemap.xml file:
class SitemapController < ApplicationController
layout nil
def index
headers['Content-Type'] = 'application/xml'
last_post = Post.last
if stale?(:etag => last_post, :last_modified => last_post.updated_at.utc)
respond_to do |format|
format.xml { @posts = Post.sitemap } # sitemap is a named scope
end
end
end
end
My understanding is that the stale?
method should ensure a HTTP 304 Not Modified response if the content hasn't changed. However, whenever I test this using curl or a web browser I always get an HTTP 200:
$ curl --head localhost:3000/sitemap.xml HTTP/1.1 200 OK Connection: close Date: Mon, 13 Apr 2009 15:50:00 GMT Last-Modified: Wed, 08 Apr 2009 16:52:07 GMT X-Runtime: 100 ETag: "5ff2ed60ddcdecf291e7191e1ad540f6" Cache-Control: private, max-age=0, must-revalidate Content-Type: application/xml; charset=utf-8 Content-Length: 29318
Am I using the stale?
method correctly? Is it even possible to test this locally?