WebResource.axd and HTTP Headers

Question

Our site just moved from .NET 1.1 to .NET 3.5, and in the process updated our 3rd party server controls. One of these packages uses javascript provided via WebResource.axd. These are included as normal <script src="" /> tags.

Watching the traffic, however, I see that these javascript files are coming across with headers that prevent client-side caching. And we're talking a lot of javascript. The headers in question:

Cache-control: no-cache, no-store
pragma: no-cache
Expires: -1

Are these headers configurable in .NET somewhere? Can I intercept these requests short of building an HttpModule? Is this something I can blame the control vendor for? <brandish weapon="blameGun" />

Thanks,

Baron

Answer 1

You could try:

HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Public);

The other types of HttpCacheability are documented here:

http://msdn.microsoft.com/en-us/library/system.web.httpcacheability.aspx

Edit:

You can throw this in your Global.asax file instead of a module:

void Application_AuthorizeRequest(object sender, EventArgs e)
{
    if (Request.Path.IndexOf("WebResource.axd") > -1)
    {
        Response.Cache.SetCacheability(HttpCacheability.Public);
    }
}