The header functionality only works if you have enabled the header mod. Please refer to your local documentation for more information on how to do this.

For example, the <Location> directive below would add the line Cache-Control: max-age=604800 to every image that comes out of www.mysite.com/AGChannel/images/avantgo/developer/:

Likewise, the <Location> directive below would add Cache-Control: max-age=43200 to every web page that is located in www.mysite.com/AGChannel/articles:

What if there is one web page in the /AGChannel/articles/ directory that should have a shorter cache time? If you follow the previous directive with the <Location> directive below, it won't work:

The <Location> directive above produces the Cache-Control header below:

This is pretty confusing and error-prone, and it is hard to predict which age the proxy server will actually obey. Instead, try something like this:

The Header unset Cache-Control directive will remove any and all Cache-Control headers, so that you have a clean slate on which to add your own.