Question

(I’ve browsed through a ton of links on stack and articles like this on Microsoft http://forums.iis.net/t/1161629.aspx/1 Anything regarding sub-domains on stack either doesn’t have an answer or the solution simply doesn’t work. Please keep this in mind before flagging as "duplicate". I did my homework before asking)

I’m not certain whether or nto this has anything to do with MVC4 or not but here is my rule:

<rewrite>
  <rules>
    <rule name="Apply Sub-Domain as Query String Argument" stopProcessing="false">
      <match url="^(.+)$" />
      <conditions trackAllCaptures="false">
                    <add input="{HTTP_HOST}" pattern="^(^local[a-z0-9]+)\.domain\.com(.*)$" />
      </conditions>
      <action type="Rewrite" url="https://local.domain.com{C:2}?cobrand={C:1}" logRewrittenUrl="false" />
    </rule>
  </rules>
</rewrite>

I expect this for a url of https://subdomain.domain.com to send this into MVC4 as https://local.domain.com?cobrand=subdomain but it isn’t firing.

In my MVC application I have a view defined as:

<div>
    Cobrand = @HttpContext.Current.Request.QueryString["cobrand"]
</div>
<div>
    Requested URL = @HttpContext.Current.Request.Url
</div>
<div>
    Path = @HttpContext.Current.Request.Path
</div>

With the following output for this requested url https://localdemo1.domain.com :

<div>
    Cobrand = 
</div>
<div>
    Requested URL = https://localdemo1.domain.com
</div>
<div>
    Path = /
</div>

My desired output is:

<div>
    Cobrand = localdemo1
</div>
<div>
    Requested URL = https://local.domain.com?cobrand=localdemo1
</div>
<div>
    Path = /
</div>

A note about the site setup:

The IIS Site has bindings for:

HTTP::

local.domain.com

localdemo1.domain.com

localdemo2.domain.com

HTTPS::443 (No host configuration, can’t configure host on 443 but it’s configured to allow SSL)

PS: I tried this without HTTPS and it yields the same results, as not firing at all.

Answer 1

Here is what works for me:

<rewrite>
  <rules>
    <rule name="Apply Sub-Domain as Query String Argument" stopProcessing="false">
      <match url="^.*$" />
      <conditions trackAllCaptures="false">
                    <add input="{HTTP_HOST}" pattern="^(^local[a-z0-9]+)\.domain\.com(.*)$" />
      </conditions>
      <action type="Redirect" url="https://local.domain.com{R:0}?cobrand={C:1}" />
    </rule>
  </rules>
</rewrite>

Note that the match url as changed (accepting empty values) and that type="Redirect" has replaced type="Rewrite".

{C:2} doesn’t work in this case (I am not able to tell you why…) but you can use {R:0} instead.