Is there a way to track how a file gets served from the IIS handler pipeline?

I'm trying to figure out if static assets are being routed into the asp.net pipieline/Sitecore CMS at all, but it's hard to tell without some way of being able 开发者_C百科to track what modules/handlers went into handling an HTTP request from IIS. Is there any way/tool to tap into IIS that will give me information on how a particular request was handled, which assemblies it went through, etc?

If you remove permissions to the file, you should get an error page that displays the name of the HTTP handler if you're browsing from the same machine as IIS.