How to know the original url after url rewrite?

Question

I have url rewrite rules which redirect www.domain2.com to a subfolder under the root of a domain1.com (let's call this folder subproject). In my controller, I need to construct a URL to the original non modified path but the Request.Url properties (like AbsoluteUri or LocalPath) always contain the subproject subfolder.

In other words, if the user typed:

www.domain2.com/controller/action

urlrewrite makes it:

www.domain1.com/subproject/controller/action

and I wish to reconstruct the original url:

www.domain2.com/controller/action

I could hardcode the removal of subproject from the url and begin the url with domain2 but I need a generic piece of code because this url reconstruction will be in a reusable library. domain2 could be in the settings of my app but what about the subfolder?

In reference, here is the rewrite rule:

<rewrite>
    <rules>
        <rule name="Redirect to subproject">
            <match url=".*" />
            <conditions>
                <add input="{HTTP_HOST}" pattern="^(www.)?domain2.com" />
                <add input="{PATH_INFO}" pattern="^/subproject/" negate="true" />
            </conditions>
            <action type="Rewrite" url="\subproject\{R:0}" />
        </rule>
    </rules>
</rewrite>

Thank you

Answer 1

I didnt verify it, but what about refferer?

Answer 2

You should be able to find it in Request.RawUrl.