Irule to set expires headers for static conent

I was trying to make things a little harder than they needed to be, here is an irule that works:

 

 

when HTTP_REQUEST {

 

set HTTP_URI [HTTP::uri]

 

}

 

 

when HTTP_RESPONSE {

 

if {[matchclass $HTTP_URI ends_with $::images]} {

 

HTTP::header insert Expires "[clock format [expr ([clock seconds]+86400)] -format "%a, %d %h %Y %T GMT" -gmt true]"

 

}

 

}