GZIP CSS and Javascript files in IIS - iis

Question

I'm trying to deliver to the browser the Compressed & Gzipped version of my javascript files using coldfusion.
I've tried to add the following to the web.config but still not showing GZIP (using Fiddler)
<httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files">
<scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll"/>
<dynamicTypes>
<add mimeType="text/*" enabled="true"/>
<add mimeType="message/*" enabled="true"/>
<add mimeType="application/javascript" enabled="true"/>
<add mimeType="*/*" enabled="false"/>
</dynamicTypes>
<staticTypes>
<add mimeType="text/*" enabled="true"/>
<add mimeType="message/*" enabled="true"/>
<add mimeType="application/javascript" enabled="true"/>
<add mimeType="*/*" enabled="false"/>
</staticTypes>
</httpCompression>
<urlCompression doStaticCompression="true" doDynamicCompression="true"/>

Answer 1

I solved my problem by installing dynamic compression under IIS Roles Services and now it works like a charm.

Answer 2

With compression on in IIS there is no need to pre-compress the .js files. The server will manage compressing, checking for browser support and sending the compressed file when it is supported without you doing any work on your end.
You just need to put the js file on the server and you should be good to go. Just use the normal file name in the src for the script tag and the server will manage all of the rest of it. Since it is not a ColdFusion file the ColdFusion server doesn't ever touch it.

Answer 3

Isn't the browser just uncompressing it, like it should, and your seeing the the end result.
You could also use cfhttp to hit the same url, and see what it returns. With that, you can easily control and see what is compressed or uncompresed.

Answer 4

Only use the compression option in IIS, and directly link to the JS / CSS files, don't serve them via ColdFusion.
The content in your browser window has been minified, not compressed.
Browsers are aware of compressed content; the browser will tell the server what formats (if any) that they can handle. The compressed js file is automatically decompressed by the browser before you see it. This is why the content is see is plain text.
As for YSlow, make sure it is not complaining about uncompressed CSS files.

Answer 5

It looks like you've specified that the MIME type "application/x-javascript" should be compressed by IIS. However, you are returning the MIME type "application/javascript" from ColdFusion.

Answer 6

for css compression maybe you guys should try this attribute;
<add mimeType="text/css" enabled="true"/>
and its the entire code(leverage browser caching includes);
<system.webServer>
<httpCompression directory="C:\inetpub\temp\IIS Temporary Compressed Files">
<scheme name="gzip" dll="C:\Windows\System32\inetsrv\gzip.dll"/>
<dynamicTypes>
<add mimeType="text/*" enabled="true"/>
<add mimeType="message/*" enabled="true"/>
<add mimeType="application/javascript" enabled="true"/>
<add mimeType="*/*" enabled="false"/>
<add mimeType="text/css" enabled="true"/>
</dynamicTypes>
<staticTypes>
<add mimeType="text/*" enabled="true"/>
<add mimeType="message/*" enabled="true"/>
<add mimeType="application/javascript" enabled="true"/>
<add mimeType="*/*" enabled="false"/>
</staticTypes>
</httpCompression>
<urlCompression doStaticCompression="true" doDynamicCompression="true"/>
<staticContent>
<clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="365.00:00:00"/>
</staticContent>
</system.webServer>