Cache aspx page returning an asset on client?

How do you cache an aspx page call on the client?

The aspx page returns an asset and looks like this:

http://srv-edu-build/edumatic3/dev/RetrieveBlob.aspx?assetId=31809&assetFileId=9823

We have tried with Output Cache, with caching in the code behind, but the only result we get is server side caching (by IIS7).

In the header of 开发者_C百科the response cache-control is set to public and expiration time is set (to 14800 as set in output cache profile).

I think I've found why this happens it's a bug in IE.

IE can't cache if the Vary:* HTTP response header is used, but IIS returns it by default because it's in the HTTP 1.1 spec.

Try adding the following to your web.config:

<system.web> 
    <caching>
        <outputCache omitVaryStar="true" />
    </caching>
</system.web>