[Active4d-dev] Caching prevention strategies?

[Brad Perkins]

The best way to prevent caching in dynamic web systems (a4d, asp, php, jsp, 
cgi, etc) is to append a random query parameter to every url. Using meta 
tags and sending special "no cache" headers sometimes works, but is mostly 
unreliable when users are using IE, which is unfortunately so popular.

I'm also seeing many or our system users have web proxies unknowingly 
placed on their networks -- as happened here -- which seems to make the 
problem worse. Consequently, users who previously didn't have caching 
problems now do.

My existing systems don't have these random query parameters, but need 
them. Modifying all my code to append them is a possibility, but will take 
a long time, plus I'll probably miss some places. Is there a better way to 
do this? Something generic that can be easily applied to every page?

Thanks,
Brad Perkins