IIS rewrite rule not passing query parameter - iis

Question

I think I am trying to do something that should be simple. I want to have a rewrite rule that takes any incoming request, from many domains, and rewrites it to /redirect.aspx?src=original URL
This is what I have
<rewrite>
<rules>
<rule name="SimpleURL" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="{URL}" negate="true" pattern="\.aspx$"/>
</conditions>
<action type="Redirect" url="/Redirect.aspx?src={R:0}" appendQueryString="true" redirectType="Permanent" />
</rule>
</rules>
</rewrite>
It works except the query parameter being passed is src= without any value.
I made a change so it's now passing a hard coded value for the query parameter
I made a change so it is now passing a value for the parameter.
<rewrite>
<rules>
<rule name="SimpleURL" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="{URL}" negate="true" pattern="\.aspx$"/>
<add input="{QUERY_STRING}" pattern="src=(.*)" negate="true" />
</conditions>
<action type="Redirect" url="/Redirect.aspx?src=foobar" appendQueryString="true" redirectType="Found" />
</rule>
</rules>
</rewrite>
If I replace the foobar with {R:0}, no value is passed. enter code hereThe hard coded foobar value is passed.

Answer 1

Your rule looks fine, and works fine on my machine however you are using a permanent redirect. Did you make any changes to the rule while testing? Try testing it from an Incognito/Private mode browser or test a different URL.
Try the following rule:
<rule name="SimpleURL" stopProcessing="true">
<match url="(.*)" />
<conditions trackAllCaptures="true">
<add input="{URL}" negate="true" pattern="\.aspx$"/>
<add input="{QUERY_STRING}" pattern="src=(.*)" negate="true" />
<add input="{URL}" pattern="(.*)" />
</conditions>
<action type="Redirect" url="/Redirect.aspx?src={C:2}" appendQueryString="true" redirectType="Found" />
</rule>