Question

I have found this bit of web.config code for checking the url to see if its missing the www. if it is then it redirects the user to the www. url

    <rewrite>
        <rules>
            <clear />
            <rule name="WWW Rewrite" enabled="true">
                <match url="(.*)" />
                <conditions>
                    <add input="{HTTP_HOST}" negate="true" pattern="^www\.([.a-zA-Z0-9]+)$" />
                </conditions>
                <action type="Redirect" url="http://www.{HTTP_HOST}/{R:0}" appendQueryString="true" redirectType="Permanent" />
            </rule>
        </rules>
    </rewrite>

however i need to do the opposite and i have been hacking around with it (im not very good with regular expressions, no matter how much i try) to try and get it to see if the url has www then redirect it to the non www

reason being is i have a subdomain

trade.words.co.uk
but i want to make sure they dont go to http://www.trade.words.co.uk

Thanks for any help in advance

Answer 1

Try this:

<rewrite>
    <rules>
        <clear />
        <rule name="WWW Rewrite" enabled="true">
            <match url="(.*)" />
            <conditions>
                <add input="{HTTP_HOST}" pattern="^(?:www\.)([.a-zA-Z0-9]+)$" />
            </conditions>
            <action type="Redirect" url="http://{C:1}/{R:0}" appendQueryString="true" redirectType="Permanent" />
        </rule>
    </rules>
</rewrite>