ASP.net MVC site : Redirect all “non WWW” request to WWW

Recently I migrated an ASP.net site to ASP.net MVC site. Earlier there were two host headers one mydomain.com and another is www.mydomain.com. My SEO says you should use only one url "www.domain.com" for SEO advantage.

I am looking for an option to do 301 permanent redirect all mydomain.com request to www.mydomain.com.

The site is hosted in IIS6 and developed in ASP.net MVC 4.

Craig

Unfortunately, the URL rewrite module does not work with IIS6 (only IIS7 or greater). Have you considered creating your own HttpModule, something like this this?

IIS 6 how to redirect from http://example.com/* to http://www.example.com/*

Or you could potentially use a 3rd party solution like one of these:

http://iirf.codeplex.com/

http://www.urlrewriting.net/149/en/home.html

http://www.isapirewrite.com/

http://urlrewriter.net/

Tommy

You can do this from your web.config file

<system.webServer>
    <rewrite>
        <rules>
          <rule name="Redirect to WWW" stopProcessing="true">
            <match url=".*" />
            <conditions>
              <add input="{HTTP_HOST}" pattern="^example.com$" />
            </conditions>
            <action type="Redirect" url="http://www.example.com/{R:0}"
                 redirectType="Permanent" />
          </rule>
        </rules>
    </rewrite>
</system.webServer>

You could use config or Url Rewriter in IIS, but the best method I've found is just to put some code in Application_BeginRequest() in your global.asax.cs like this:

var HOST = "www.mydomain.com";

if ( !Request.ServerVariables[ "HTTP_HOST" ].Equals(
  HOST,
  StringComparison.InvariantCultureIgnoreCase )
)
{
  Response.RedirectPermanent(
    ( HttpContext.Current.Request.IsSecureConnection ? "https://" : "http://" )
    + HOST
    + HttpContext.Current.Request.RawUrl );
}

Because you're doing this in code, you can have whatever logic you need on a per-request basis.

(IIS 7 or greater required)

from http://www.codeproject.com/Articles/87759/Redirecting-to-WWW-on-ASP-NET-and-IIS

(Similar to above solution, but not requiring you to add your own domain name.)

<configuration>
    <system.webServer>
        <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>
    </system.webServer>
</configuration>

Note that you will most likely see squiggly lines under the tag with a message that the tag is invalid. I got this message but, in fact, it worked just fine.

If you want the intellisense to work, you can try this update here...

http://ruslany.net/2009/08/visual-studio-xml-intellisense-for-url-rewrite-1-1/

More information about httpRedirect can be found here...

http://www.iis.net/configreference/system.webserver/httpredirect

来源：https://stackoverflow.com/questions/15951963/asp-net-mvc-site-redirect-all-non-www-request-to-www

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