c# - How to redirect with "www" URL's to without "www" URL's or vice-versa?

Question

I am using ASP.NET 2.0 C#. I want to redirect all request for my web app with "www" to without "www"

www.example.com to example.com

Or

example.com to www.example.com

Stackoverflow.com is already doing this, I know there is a premade mechanism in PHP (.htaccess) file. But how to do it in asp.net ?

Thanks

Answer 1

There's a Stackoverflow blog post about this.

https://blog.stackoverflow.com/2008/06/dropping-the-www-prefix/

Quoting Jeff:

Here’s the IIS7 rule to remove the WWW prefix from all incoming URLs. Cut and paste this XML fragment into your web.config file under

<system.webServer> / <rewrite> / <rules>

<rule name="Remove WWW prefix" >
<match url="(.*)" ignoreCase="true" />
<conditions>
<add input="{HTTP_HOST}" pattern="^www.domain.com" />
</conditions>
<action type="Redirect" url="http://domain.com/{R:1}"
    redirectType="Permanent" />
</rule>

Or, if you prefer to use the www prefix, you can do that too:

<rule name="Add WWW prefix" >
<match url="(.*)" ignoreCase="true" />
<conditions>
<add input="{HTTP_HOST}" pattern="^domain.com" />
</conditions>
<action type="Redirect" url="http://www.domain.com/{R:1}"
    redirectType="Permanent" />
</rule>