Help in migrating from ISAPI_Rewrite to IIS7 URL Rewriting

Question

Hi, I've this ISAPI_Rewrite rule:

RewriteRule /([^/.?]+) /sc.asp?p=$1 [I,L]

This rule should rewrite Urls like:

/some-article

/article2

and shouldn't rewrite Urls like:

/home.asp

/admin (because there's a directory named admin)

/admin/

/sites/gutterman

It works great in ISAPI_Rewrite Yesterday I bought a Windows 2008 R2 VPS, and I started to transfer my ASP-classic web application to the new server. Now, everything is working great, except for URL Rewriting. I google-ed a little bit and found that the IIS7 URL Rewrite module is completely different from the ISAPI_Rewrite.

I created a Blank Rule. In the pattern I set /([^/.?]+), in Action -> Action Type I set Rewrite and in Action -> Action properties -> Rewrite Url I set sc.asp?p={R:0}. It didn't work.

After some googling I found that I have to remote the / character in the start of my pattern (so my pattern is now ([^/.?]+)). So I did it, and now, it is just rewriting any url, and it should rewrite only urls that aren't directories or files.

Any ideas?

Thank you.

Answer 1

The simplest way to avoid rewriting URLs that actually point to existing files is to add these conditions:

<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />

Also, your match pattern shows a common misconception. The querystring is not passed to the Match URL pattern, so you don't need to look for ?.