Example

Output fn="insert-filter"
          type="text/*"
          filter="http-compression"
          vary="on"
          compression-level="9"

In this example, type="text/*" restricts compression to documents that have a MIME type of text/* (for example, text/ascii, text/css, text/html, and so on).

Alternatively, you can specifically exclude browsers that do handle compressed content well by using the Client tag as follows:

<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>

This example restricts compression to browsers that are not any of the following:

• Internet Explorer for Windows earlier than version 4

• Internet Explorer for Macintosh earlier than version 6

• Netscape Navigator/Communicator earlier than version 6

Internet Explorer on Windows earlier than version 4 may request compressed data at times, but does not correctly support it. Internet Explorer on Macintosh earlier than version 6 does the same. Netscape Communicator version 4.x requests compression, but only correctly handles compressed HTML. It does not correctly handle linked CSS or JavaScript^TM from the compressed HTML, so administrators often simply prevent their servers from sending any compressed content to that browser (or earlier).

For more information about the Client tag, see Client.