Static compression in IIS does not work for htm, js files

Question

I'm trying to configure IIS 7.5 to compress static htm and js files. Does anyone know why it does not work for me? Here is my web.config for the web site:

    <httpCompression>          
        <dynamicTypes>
            <add mimeType="text/*" enabled="true" />
            <add mimeType="message/*" enabled="true" />
            <add mimeType="application/x-javascript" enabled="true" />
            <add mimeType="*/*" enabled="false" />
        </dynamicTypes>
        <staticTypes>
            <add mimeType="text/*" enabled="true" />
            <add mimeType="message/*" enabled="true" />
            <add mimeType="application/x-javascript" enabled="true" />
            <add mimeType="*/*" enabled="false" />
        </staticTypes>
    </httpCompression>
    <urlCompression doStaticCompression="true" doDynamicCompression="false" />

Compression starts working when I set doDynamicCompression to true. But I can't use this option because it is disabled at my hosting.

Thank you.

Answer 1

What makes you think the compression is not working? Check the Event View logs. Static Compression module will sometimes throw an error saying the directory being used is invalid (mostly because it needs write permissions).

Double check with Fiddler or another HTTP debugging tool to be sure that the client is sending "Accept-Encoding" of GZIP/Deflate.

Answer 2

Enabling Http caching and compression in IIS 7 for asp.net websites - Anil Kasalanati

How about this? Checkyour applicationHost.config file.