Cache-Control Header & Browser Caching IIS7

Question

I am using Google Page Speed on my website in IIS7 and I was wondering how to set

Leverage browser caching - The following resources are missing a

Answer 1

I imagine you already figured this out, but read up on setting content expiration in IIS here.

Note that this only applies to static content served by IIS. If you are looking to set caching headers for dynamic content (ASPX, PHP, ISAPI, whatever), you need to generate your own Expires and Cache-Control headers in your application. IIS will (quite correctly) not attempt to apply cache-control headers to dynamic pages that may include Set-Cookie headers or private data. ASP and ASP.net automatically set "Cache-Control: private" by default for all pages, but you can override that behavior on a per-response basis.

Answer 2

Under system.webServer in web.config set for example

<caching>
            <profiles>
                <add extension=".png" policy="CacheUntilChange" kernelCachePolicy="CacheUntilChange" location="Any" />
                <add extension=".jpg" policy="CacheUntilChange" kernelCachePolicy="CacheUntilChange" location="Any" />
                <add extension=".gif" policy="CacheUntilChange" kernelCachePolicy="CacheUntilChange" location="Any" />
            </profiles>
        </caching>

This can also be configured from IIS Manager under Output Caching but what the GUI doesn't do is set the 'location' attribute. Setting it to 'Any' will set Cache-Control:public.

You can read more about it here.