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Leverage Cache-Controll IIS 7.5

Hi all,

I'm running page speed to test for SEO performance on a site.

We are running IIS 7.5.

Now it's recommending we leveage browser cache-control. We have the following in the web.config

<location path="content/images">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
      </staticContent>
    </system.webServer>
  </location>
  <location path="content/css">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
      </staticContent>
    </system.webServer>
  </location>
  <location path="scripts">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
      </staticContent>
    </system.webServer>
  </location>

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now when i view the headers in firefox. cache control is marked as private. This is why I assume it failing the page speed test. Will the fact its makred as private (even though I asusme the cache control is still being completed) affect the SEO?

Dan McFadden

Here is the definition of the cache control directives by the W3C:

link: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1

The main difference between public and private is that it indicates whether an object can be stored in a shared cache (public) or is to only be stored for a single user (private)

You can directly control the cache directives using:

1. public
2. private
3. no-cache

Here is the tech reference to the clientCache element:

link: http://www.iis.net/configreference/system.webserver/staticcontent/clientcache

Notice that there is a "cacheControlCustom" attribute available. Here you can explicitly set the directive to be used. For example:

<clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />

can be

<clientCache cacheControlCustom="public/private/no-cache" cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />

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Dan

flynny

ASKER

Hi Dan,

Many thanks for the reply.

Ok, so caching is working then if its showing private which is fine. I misunderstoo the meaning of this.

Do you have any ideas why thepagespeed is recommending I need to leverage the browser caching?

Is it looking for a appcache manifest or something?

flynny

ASKER

Hi Dan,

Just to add I have added the custom attribute to each to set it to public. Now when I view the header info through the browser (firefox) i have max-age=0 ??

An ideas?

Dan McFadden

Can you post the client cache object lines from your config?

Dan

flynny

ASKER

Hi Dan,

Of Course, I have the following in my web.config now

<location path="content/images">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
      </staticContent>
    </system.webServer>
  </location>
  <location path="content/css">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
      </staticContent>
    </system.webServer>
  </location>
  <location path="scripts">
    <system.webServer>
      <staticContent>
        <clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
      </staticContent>
    </system.webServer>
  </location>

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ASKER CERTIFIED SOLUTION

Dan McFadden

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