IIS URL Rewrite Module : Redirect Based On QueryString

Question

I Have some problems with redirecting to another URL based on the query string parameters. I want to redirect users which enter www.domain.com/signup.aspx?p=1 to:

www.domain.com/signup

<rule name="Signup Redirect 1" stopProcessing="true">   <match url="signup\.aspx\?p=1" />   <conditions logicalGrouping="MatchAll" />   <action type="Redirect" url="signup" redirectType="Temporary" /> </rule> 

Now when they enter www.domain.com/signup.aspx?p=2 they must go to:

www.domain.com/signup/promocode

<rule name="Signup Redirect 2" stopProcessing="true">   <match url="signup\.aspx\?p=2" />   <conditions logicalGrouping="MatchAll" />   <action type="Redirect" url="signup/promocode" redirectType="Temporary" /> </rule> 

The above rules don't work. What is the right way to do this? Thanks in Advance.

Gr

Martijn

Answer 1

A more robust method of using a value to select a destination is to use Rewrite Maps. The map is essentially a lookup table. This doesn't require a new rule (and an additional evaluation of the URL against a pattern on every request) for every new path.

<rules>   <rule name="Signup Redirect Map" stopProcessing="true">     <match url="^signup\.aspx$" />     <conditions logicalGrouping="MatchAll" trackAllCaptures="true">       <add input="{QUERY_STRING}" pattern="p=([^&amp;]+)" />       <add input="{Signups:{C:1}}" pattern="(.+)" />     </conditions>     <action type="Redirect" url="{C:2}" redirectType="Temporary" />   </rule> </rules> <rewriteMaps>   <rewriteMap name="Signups">     <add key="1" value="signup" />     <add key="2" value="signup/promocode" />     <add key="3" value="signup/newcode" />     <add key="n" value="signup/futureproof" />   </rewriteMap> </rewriteMaps> 

Definitions:

• {C:1} is a backreference to the first condition match: the query string value.
• {Signups:{C:1}} is an instruction to look up {C:1} in the Signups map.
• {C:2} is a backreference to the second condition match: the value from the Signups map.

Answer 2

See if this works a bit better:

<rule name="Signup Redirect 1" stopProcessing="true">   <match url="signup\.aspx$" />   <conditions>     <add input="{QUERY_STRING}" pattern="p=1" />   </conditions>   <action type="Redirect" url="signup" redirectType="Temporary" /> </rule>  <rule name="Signup Redirect 2" stopProcessing="true">   <match url="signup\.aspx$" />   <conditions>     <add input="{QUERY_STRING}" pattern="p=2" />   </conditions>   <action type="Redirect" url="signup/promocode" redirectType="Temporary" /> </rule>