Web caching liability

Paul A Vixie paul at vix.com
Fri Jan 2 18:24:31 UTC 1998

> they've been problems for a long time; some of their proxy servers 
> hold cache data for far too long. i have some web discussion pages 
> that are effectively useless for aol subscribers because aol even 
> caches cgi generated stuff with obvious cgi related extensions like 
> ".cgi" and ".pl".

nowhere in the standards is ".pl" recommended to be treated as an 
implicit Cache-Control:.  if you tag your responses with Cache-Control:
headers that make them do what you want (in this case, make the response
uncacheable) then you won't have the above-described problem.

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