HTTP compression: Excluding traffic from getting compressed

Question

Hi-
We have a web application where we are trying to exclude certain traffic from getting compressed.
The following should get compressed:
http://www.domain.com/dir1/a.htm
but the following should not get compressed:
http://www.domain.com/dir2/b.htm
I have configured my Sun One web server obj.conf file as follows:
<Object name="default">
NameTrans fn="pfx2dir" from="/dir1" dir="/opt/myapp/dir1"
NameTrans fn="pfx2dir" from="/dir2" dir="/opt/myapp/dir2"
<Client match="none"\
browser="*MSIE [1-3]*"\
browser="*MSIE [1-5]*Mac*"\
browser="Mozilla/[1-4]*Nav*">
Output fn="insert-filter" filter="http-compression" type="text/*"
</Client>
</Object>
<Object ppath="*dir2*">
Output fn="insert-filter" filter="http-compression" type="text/*" vary="off"
</Object>
But the objects (GIFs, HTML, TEXT, etc) where the dir2 condition is met are still getting compressed. Would someone be able to assist me?
Thanks,
Nimbus

Answer 1

It looks like you expected the vary parameter to control whether the http-compression SAF compresses content. It doesn't. The vary parameter controls whether the http-compression SAF adds a Vary: header field to the response.
If you don't want all files to be compressed, you should remove the Output fn="insert-filter" filter="http-compression" directive from the default object. You can instead create a new object only for those files you wish to be compressed:<Object ppath="/opt/myapp/dir1/*">
<Client match="none"
        browser="*MSIE [1-3]*"
        browser="*MSIE [1-5]*Mac*"
        browser="Mozilla/[1-4]*Nav*">
Output type="text/*"
       fn="insert-filter"
       filter="http-compression"
</Client>
</Object>