The Blog of Harald

A few days ago “I complained about Internet Explorer”:http://blog.cfrq.net/chk/archives/2004/08/21/argh-msie-and-bandwidth/

Google searching leads me to believe that MSIE doesn’t send If-Modified-Since: headers for images (and possibly other files, like CSS); instead, it expects to see an Expires: header in the HTTP response (It will also apparently listen to Cache-Control: headers). The beauty of standards is that there are so many to choose from…

More Googling led me to the following configuration directives for Apache:

   ExpiresActive On
   ExpiresByType image/gif "access plus 1 week"
   ExpiresByType image/jpeg "access plus 1 week"
   ExpiresByType image/png "access plus 1 week"

(It’s possible that image/* will work; I haven’t tried it).

I hope this helps someone else; I hope it helps me remeber next time :-)