Executing a managed module for a rewritten URL in IIS7 Integrated Mode

In my ASP.NET app, I have two HTTP modules. One of them is used for rewriting URLs, the other is used for app-specific stuff (custom authentication .. etc). The URL-Rewriting module is executed for all requests, while the other module is only executed for managed file extensions, like .aspx

Here's how the modules are defined in web.config (note that preCondition is blank for UrlRewriteModule. This cause it to get executed for all requests):

<system.webServer>
  <modules>
    <add name="UrlRewriteModule" type="MySite.UrlRewriteModule" preCondition="" />
    <add name="SiteModule" type="MySite.SiteModule" preCondition="managedHandler" />
  </modules>
</system.webServer>

In UrlRewriteModule I use RewritePath() to rewrite some URLs (directory-like) into files with query strings. For example, from "/p/5/some-thoughts-about-the-future/" to "/post.aspx?id=5"

Now, I was under the impression that when a URL gets rewritten, IIS7 executes the managed module (SiteModule in this case) if the new URL is for a managed extension (like .aspx). But, this doesn't seem to be the case. I noticed that SiteModule开发者_如何学Go doesn't get executed for any rewritten URLs.

Am I missing something (or doing something wrong) or is this the normal behavior in IIS7?

I came across Server.TransferRequest() which actually solves the problem (behind the scence, it involves creating a new child request). But, this can also cause a lot of overhead esp. under server load, and I generally prefer to avoid it.

So, is there a way to get SiteModule to execute whenever a URL gets rewritten without using Server.TransferRequest()?

Thanks!