If a rule has the form
IF P THEN DO A
(sometimes written P -> A as operational semantics)
then I'll call P the lefthand side or precondition or predicate.
Some examples are
if (http:response:header:set-cookie ~= "RMID=\([^;]*]" ) then
munge_cookie ( $1 )
if (http:content-type ~= "^text") and
( set_of (http:body:img:src ) ~= "[/]images/global[/]") then
rewrite_images ()
etc.
Hilarie
On Tue, 17 Aug 2004, Markus Hofmann wrote:
> Hilarie Orman expressed a preference for having P support regular
> expressions in the lefthand side of rules,
Hilarie,
Can you give an example or two of a regular expression in the
lefthand side of rules? What is "lefthand side of rules"? Just trying
to understand what the requirement is here...
Thanks,
Alex.