How to rewrite url with HTTP or HTTPS

Question

User-5842959 posted

I have the following rule in my web.config file. As you can see it takes all subdomains and redirects to 'www.'

I also have an HTTP module that does switching between HTTP and HTTPS on the OnPreRequestHandlerExecute event. From what I have read and understood, this occurs after the rewrite but I could be wrong.

This code actually works in Firefox, transferring to www. then HTTPS where necessary, however it doesn't work in either Chrome or IE, maintaining the HTTP scheme.

I would like to make some changes to the code below so that the scheme is carried over rather than just assume HTTP which is does at the moment.

<rewrite xdt:Transform="Insert">
  <rules>
    <rule name="Redirect to www">
      <match url="(.*)" />
      <conditions>
        <add input="{HTTP_HOST}" pattern="^(www\.)(.*)$" negate="true" />
      </conditions>
      <action type="Redirect" url="http://www.{HTTP_HOST}/{R:0}" redirectType="Permanent" />
    </rule>
  </rules>
</rewrite>

Answer 1

User-5842959 posted

No-one got any ideas as to how to resolve this on IIS forum?

Answer 2

User-619846739 posted

Here's a blog post on how to do that:

http://weblogs.asp.net/owscott/archive/2012/11/07/url-rewrite-protocol-http-https-in-the-action.aspx

To achieve this with your rule, it can be updated to the following:

    <rule name="Redirect to www" stopProcessing="true">
      <match url="(.*)" />
      <conditions>
                        <add input="{HTTP_HOST}" pattern="^(www\.)(.*)$" negate="true" />
                        <add input="{CACHE_URL}" pattern="^(.+)://" />
      </conditions>
      <action type="Redirect" url="{C:1}://www.{HTTP_HOST}/{R:0}" redirectType="Permanent" />
    </rule>

 

Answer 3

User-5842959 posted

Thanks.