IIS7 Rewrite Rules How to Add: ignore extensions

Question

I just added an new rewrite rule so I can redirect pages like:

www.Domain.com/PartnerNameHere/

to:

www.Domain.com/LandingPage?page=PartnerNameHere

However now all axd references are not working.

How do I set: ignore extensions for css,jpg,png axd..

enter image description here

Richard Szalay · Accepted Answer · 2011-02-15 17:14:33Z

3

+100

Current your match pattern for RewriteUserFriendlyURL1 is ^([^/]+)/?$, which makes no concession for extensions (it's matching any queries with a single URI segment).

If PartnerNameHere can never contain a ., then changing your match pattern to ^([^/.]+)/?$ should be sufficient.

If, however, you only want to block those specific extensions, you'll need to use this: ^(?![^/]+?\.(?:css|png|jpg|axd)$)([^/]+)/?$

edited Feb 15, 2011 at 17:14

answered Feb 15, 2011 at 10:20

Richard Szalay

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4 Comments

aron Over a year ago

Thanks .. I tried that and got this error: HTTP Error 500.52 - URL Rewrite Module Error. The expression "^([^/]+)/?(?<!\.(?:css|png|jpg|axd))$" has a syntax that is not valid.

Richard Szalay Over a year ago

@aron - I'm not sure why, but the Rewrite rule doesn't seem to support negative lookbehind assertions. I've updated it to use a negative lookahead assertion that I've tested in IIS. I'll update it again if I can get lookbehinds to work.

Richard Szalay Over a year ago

I've asked about the neg. lookbehind issue on the IIS forums and I'll update my answer should I get a response - forums.iis.net/p/1175656/1971981.aspx

Steven Sproat Over a year ago

This is exactly what I also needed, much appreciated.

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