Redirect to subdomain using web.config rules

Question

we migrate our webapp hosted in a directory "webapp" inside main domain:

http://www.example.com/webapp/

To the new subdomain without "webapp" folder:

http://subdomain.example.com/

I need to redirect only subdir "webapp". I don't want to redirect other url like http://www.example.com/ , http://www.example.com/folder1 , http://www.example.com/folder2 , ....

But we have already sent a lot of emails to customers with link inside like: <a href="http://www.example.com/webapp/login">LOGIN TO YOUR DASHBOARD</a> or other link like <a href="http://www.example.com/webapp/data/download.php/id=xxx">DOWNLOAD YOUR DOC</a>

Now i'm trying to do a redirect trough web.config but it seem that nothing work.

If I try no navigate to, for example, http://www.example.com/webapp/login i don't get redirected to http://subdomain.example.com/login/ as expected.

If I try no navigate to, for example, http://www.example.com/webapp/data/download.php/id=43 i don't get redirected to http://subdomain.example.com/data/download.php/id=43 as expected.

Any suggest?

<rule name="redirect-to-subdomain" stopProcessing="true">
    <match url="^webapp/$" />
    <conditions>
        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
    </conditions>
    <action type="Redirect" url="http://subdomain.example.com/{R:0}" redirectType="Permanent" />
</rule>

Answer 1

You rule won't work except for http://www.example.com/webapp/ .

If you want to redirect link like http://www.example.com/webapp/login . Please try this rule.

<rule name="redirect-to-subdomain" stopProcessing="true">
    <match url="^webapp/(.*)$" />
    <conditions>
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
    </conditions>
    <action type="Redirect" url="http://subdomain.example.com/{R:1}" redirectType="Temporary" />
</rule>