Thread: IIS Rewrite Regex

I have installed IIS rewrite module for IIS7 and although it's working I'm having a slight problem with the Regex.

It's just a very simple URL rewrite where I want to have

Code:

/page/page2/id/ to go to
pagepage2.aspx?ID=id

This works fine as it is, but I've found browsers (IE specifically) knock the last / off the URL in the autocomplete dropdown and my regex won't handle it.

I currently have 3 rewrite rules, in order of
1

Code:

([_a-z0-9]+)/([_a-z0-9]+)/([_a-z0-9]+)[/]?
goes to
{R:1}{R:2}.aspx?ID={R:3}

2

Code:

([_a-z0-9]+)/([_a-z0-9]+)[/]?
goes to
{R:1}{R:2}.aspx

3

Code:

([_a-z0-9]+)[/]?
goes to
{R:1}.aspx

But if I try loading page/1 it loads the first time, but when it does a partial postback on the page the rewrite ends up as pagepage1.aspx

I don't understand why it's doubling up the first variable. If I try page/1/ it works fine. It's just the last / I can't get to work right.

Hope that makes sense.

Any ideas?

<edit>Actually, it works on the first partial postback and then adds in the extra section to the rewrite on the second partial postback</edit>

OK. I found the problem.

.NET was automatically adding the action variable to the form, but because of the rewrite it was adding some ../ to the url.

I added this in my page_load and it solved the problem

Code:

Page.Form.Action = HttpContext.Current.Request.Url.ToString
 

OK. That doesn't seem to have solved the problem.

Basically I want a regex that will catch:-

Code:

page/1/ or page/1
and redirect to
page1.aspx

Currently what I have is

Code:

([_a-z0-9]+)/([_a-z0-9]+)/
 

I have tried changing the last / to ([/])? and /? and (/)? but none of them seem to work.

How can I make the last / optional?

Hey R, give this a try:

Code:

^([_a-z0-9]+)/([_a-z0-9]+)/?$

Originally Posted by jmurrayhead

Hey R, give this a try:

Code:

^([_a-z0-9]+)/([_a-z0-9]+)/?$

Hey J...No dice I'm afraid...I think I've already tried that..

It doesn't seem to like anything at the end of the URL regex....I tried the add trailing slash from http://ruslany.net/2009/04/10-url-re...ps-and-tricks/ and it didn't seem to like that either...

Do any sites cope with this issue or do they all just only deal with urls ending with /?

Post everything you have for the URL Rewriting.

Here you go J.....

I suspect there's a better way of doing it, but this is what I have

Code:

    <rewrite>
      <rules>
        <rule name="RewriteUrl1" stopProcessing="true">
          <match url="([_a-z0-9]+)/([_a-z0-9]+)/([_a-z0-9]+)/" />
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
          </conditions>
          <action type="Rewrite" url="{R:1}{R:2}.aspx?ID={R:3}" />
        </rule>
        <rule name="RewriteUrl2" stopProcessing="true">
          <match url="([_a-z0-9]+)/([_a-z0-9]+)/" />
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
          </conditions>
          <action type="Rewrite" url="{R:1}{R:2}.aspx" />
        </rule>
        <rule name="RewriteUrl3" stopProcessing="true">
          <match url="([_a-z0-9]+)/" />
          <conditions>
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
          </conditions>
          <action type="Rewrite" url="{R:1}.aspx" />
        </rule>
      </rules>
    </rewrite>

This works when the URL ends in / but not if it doesn't

R,

Did you try placing '^' and '$' in all your expressions, like I showed in my example? Also, I think the order the rules are in matters.

Originally Posted by jmurrayhead

R,

Did you try placing '^' and '$' in all your expressions, like I showed in my example? Also, I think the order the rules are in matters.

Hey J....I could have sworn I did, but I just tried it again and it seems to have sorted it...Awesome!!

Thanks so much J...Was pulling my hair out...

I have the order so that if I have customers/view/123/ that doesn't get caught by the rewrite 3...Do you think the order ought to change?

Originally Posted by richyrich

Hey J....I could have sworn I did, but I just tried it again and it seems to have sorted it...Awesome!!

Thanks so much J...Was pulling my hair out...

I rock

Originally Posted by richyrich

I have the order so that if I have customers/view/123/ that doesn't get caught by the rewrite 3...Do you think the order ought to change?

I think this is one of those things that is best answered by trial and error...I'm not too sure