Redirect to mobile default page by UrlRewrite module on IIS

Question

Suppose there are two designed pages, one for desktop named mobile.html and the other one is desktop.html , by below UrlRewrite I am able to redirect user to mobile.html

<rewrite>
      <rules>
            <rule name="MobileRedirect" stopProcessing="true">
                <match url=".*" />
                <conditions>
                    <add input="{HTTP_USER_AGENT}" pattern="midp|mobile|phone|android|iphone|ipad" />
                </conditions>
                <action type="Redirect" url="/mobile.html" />
            </rule>
      </rules>
</rewrite>

but it trapped in Too Many Request

yourSite redirected you too many times.

it is clear that is because of that rule , it will redirected to mobile.html with no problem but by getting mobile.html that action occurred again, it will dropped in loop redirection. also by adding <add input="{url}" negate="true" pattern="mobile.html"/> it is not working.

Answer 1

You can try the following. Add another condition that excludes the mobile.html url.

<rule name="MobileRedirect" stopProcessing="true">
  <match url="(.*)" />
  <conditions>
    <add input="{HTTP_USER_AGENT}" pattern="midp|mobile|phone|android|iphone|ipad" />
    <add input="{PATH_INFO}" pattern="^/mobile.html$" negate="true"/>
  </conditions>
  <action type="Redirect" url="/mobile.html" />
</rule> 

Answer 2

If I understand your problem correctly, you want mobile users who land on desktop.html to be redirected to mobile.html and desktop users who land on mobile.html to be redirected to desktop.html . That would require 2 rules as follow:

<rewrite>
      <rules>
            <rule name="MobileRedirect" stopProcessing="true">
                <match url="desktop.html" />
                <conditions>
                    <add input="{HTTP_USER_AGENT}" pattern="midp|mobile|phone|android|iphone|ipad" />
                </conditions>
                <action type="Redirect" url="/mobile.html" />
            </rule>
            <rule name="DesktopRedirect" stopProcessing="true">
                <match url="mobile.html" />
                <conditions>
                    <add input="{HTTP_USER_AGENT}" pattern="midp|mobile|phone|android|iphone|ipad" negate="true" />
                </conditions>
                <action type="Redirect" url="/desktop.html" />
            </rule>
      </rules>
</rewrite>

Note that this 2 rules rely on user agent which are never 100% reliable (since they can be changed).