Question

I need to add a new MIME mapping for .woff file extensions to IIS Express.

If I add the following snippet to the “applicationhost.config” of IIS Express it works fine:

<staticContent lockAttributes="isDocFooterFileName">
    <mimeMap fileExtension=".woff" mimeType="font/x-woff" />
    ...

But I would actually like to do add it to my “web.config” so that not every developer would need to change their “applicationhost.config” locally.

So I removed it again from the “applicationhost.config” file and added the following snippet to the project’s “web.config”:

<system.webServer>
  ...
  <staticContent>
    <mimeMap fileExtension=".woff" mimeType="font/x-woff" />
  </staticContent>
</system.webServer>

Unfortunately it doesn’t seem to work that way because when I try to access a .woff file I end up with a HTTP 404.3 error.

What am I doing wrong?

Answer 1

Putting it in the “web.config” works fine. The problem was that I got the MIME type wrong. Instead of font/x-woff or font/x-font-woff it must be application/font-woff:

<system.webServer>
  ...
  <staticContent>
    <remove fileExtension=".woff" />
    <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
  </staticContent>
</system.webServer>

See also this answer regarding the MIME type: https://stackoverflow.com/a/5142316/135441

Update 4/10/2013

Spec is now a recommendation and the MIME type is officially: application/font-woff