/ iis

IIS - Rewrite Subdomain To Corresponding Subdirectory

At work we have a website setup to showcase some of our work. We only ever send people directly to a specific example and the method we employed was to just put each web project in a subdirectory of the root (e.g. example.com/great-project). This can be problematic, especially for single pages apps, where the code is expecting the site to be located at the root. To avoid having to edit code I set up a new website on azure with a wildcard subdomain that points to a corresponding subdirectory.

The following rule will point any subdomain to a corresponding directory. So, demo.example.com will point to example.com/demo. Make sure than you have a CNAME record of * that points to your root domain.

<?xml version="1.0"?>
  		<rule name="Redirect subdomain" enabled="true" stopProcessing="true">
  			<match url="^(.*)$"/>
  				<add input="{HTTP_HOST}" pattern="^(.*)\.example\.com$"/>
  			<action type="Rewrite" url="{C:1}/{R:0}"/>