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02.05.07
Remove The WWW Subdomain
 By Mads Kristensen
Many websites have two points of entry for each individual page - one with www and one without. It means that if other websites link to yours, they might link to the same page using two different addresses.
If you make sure that all incoming links point to the same address, you also make sure that various page ranking algorithms of the different search engines give the page full credit for each incoming link.
We can achieve this be simply remove the "www" in the URL's on a website. That also makes the URL shorter and maybe easier recognizable. There are two ways to do this; we can use server-side or client-side techniques. The server-side is the best one, but it cannot be used by all, so I provide a JavaScript version as well.
Client-side
Add this script tag to the header of your web pages. This is the solution I have implemented here on this blog, because I cannot use the server-side approach.
The reason why I can't use the server-side approach is because dasBlog is a .NET 1.1 project and I haven't got Visual Studio 2003 installed on my machine. In with the new, out with the old and face the consequences.
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Server-side
The server-side version uses an HttpModule to filter the incoming requests and redirects them to the URL without "www". I've modified a little upon the excellent HttpModule of Keyvan Nayyeri.
For discussions about the use of 302 vs. 301 redirections, please see the comments on Keyvan's post for details and make your own decision.
Implementation
Download the RemoveWwwModule.cs below and put it the App_Code folder in the root of your website. Then add the following lines to the web.config's section:
Download
RemoveWwwModule.zip (,66 KB)
Comments
About the Author:
Mads Kristensen currently works as a Senior Developer at Traceworks located
in Copenhagen, Denmark. Mads graduated from Copenhagen Technical Academy with a multimedia degree in
2003, but has been a professional developer since 2000. His main focus is on ASP.NET but is responsible for Winforms, Windows- and
web services in his daily work as well. A true .NET developer with great passion for the simple solution.
http://www.madskristensen.dk/
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