trying to add an ExpiresDefault ExpiresByType to content on my website so that way it is cached. I use cachebusting in the URL (a revision number in the path) for Javascript, CSS, and images so that way I can set it to forever for these mimetypes. I have the following rules set up in apache httpd:
ExpiresActive On
ExpiresDefault "access plus 1 minutes"
ExpiresByType image/gif "access plus 10 years"
ExpiresByType image/png "access plus 10 years"
ExpiresByType image/jpeg "access plus 10 years"
ExpiresByType image/jpg "access plus 10 years"
ExpiresByType text/javascript "access plus 10 years"
ExpiresByType text/css "access plus 10 years"
Then when I go to my website http://karmerd.com and use httplive headers to look at the headers I get what I think should be the correct Expires for css: Expires: Sun, 03 Feb 2019 17:52:48 GMT
But I use Yahoo's Yslow firebug extension and it's still giving me an F for not using Expires! Am I doing something wrong? I'm also using gravatars on my site, but they have Expires set. Seems like everything has an expires. Is it Yslow or me?
Your javascript files are being sent out as application/x-javascript, so aren't getting a far-future Expires header.