Symfony2 ignores routing defaults cache control

Question

In my routing.yml file I have the following definition according to the doc here :

webservice_resources:
    path: /webservice/resources
    defaults:
        _controller: FooBarCogsBaseBundle:Resources:getResourcesByTags
        maxAge: 3600
        shareMaxAge: 3600

But the response headers indicate that these settings are ignored:

Cache-Control: private

I am expecting to see something more along the lines of this:

Cache-Control: public,max-age=3600,s-maxage=3600

Why would Symfony2 ignore the cache defaults?

Answer 1

What you are doing is based purely around static templates.

example in the symfony2 docs (you are not using a template, you are rendering a dynamic page it appears though):

acme_privacy:
    path: /privacy
    defaults:
        _controller:  FrameworkBundle:Template:template
        template:     'static/privacy.html.twig'
        maxAge:       86400
        sharedAge:    86400

What you want is something like this (from http://symfony.com/doc/current/book/http_cache.html ):

use Symfony\Component\HttpFoundation\Response;

$response = new Response();

// mark the response as either public or private
$response->setPublic();
$response->setPrivate();

// set the private or shared max age
$response->setMaxAge(600);
$response->setSharedMaxAge(600);

Or per that same documentation:

If you need to set cache headers for many different controller actions, you might want to look into the FOSHttpCacheBundle.

Which is located at http://foshttpcachebundle.readthedocs.org/en/latest/