重写如何在web.config system.webserver中工作

Question

I have an asp.net mvc 4 application and i have this rule in web.config

<system.webServer>
  <rewrite>
    <rules>
      <rule name="Remove Virtual Directory">
      <match url=".*" />
      <action type="Rewrite" url="{R:0}" />
    </rule>
  </rules>
</rewrite>

I can't understand why and how this works. I use it because godaddy adds a virtual path in the url with the name of the folder the application is in. ie example.com/foldername/index becomes example.com/index

So how does it finds the virual path by ".*" and removes it. And what {R:0} is? Thank you.

Answer 1

Well It seems that I the match url this regex matches every url and it doesn't allow to redirect a url that includes the virtual path. Since the routing of mvc finds the resource.

As for {R:0}. The request url is the first argument hence the 0, and the regex is a secont argument not uses. This would be the {R:1}.