All html through CGIs...

Hi guys, Do you know any good script to "call" every single html web page at my website through a cgi, avoiding the weird proxy servers cache spread out the internet? I'm currently placing the "NO-Cache" and "Pragma" meta tags at every html page but the proxy servers ignore them showing always a cached version of my webpages (even those with ssi calls, .shtml), lasting even hours to reflect every change I did to them (my clients are frustrated about getting their webpages changes online inmediatly)

I mean, when a user loads any webpage of my site:

http://www.mysite.com/cgi-bin/htmlcall.cgi?=webpage.html

or something like that. However I don't know if the target "webpage.html" are going to be cached after cgi calling

Thanks in advance for your help !!!