Great Circle Associates Firewalls
(December 1995)
 

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Subject: Re: WG: Re: CERN Proxy-Server
From: Slava Kritov <scorp @ elfstone . freenet . kiev . ua>
Date: Wed, 20 Dec 1995 12:14:11 +0200 (EET)
To: "Daniel O'Callaghan" <danny @ miriworld . its . unimelb . EDU . AU>
Cc: Jan Schubert <js @ neurotec . de>, firewall <firewalls @ GreatCircle . COM>
In-reply-to: <Pine . OSF . 3 . 91 . 951220124317 . 20727A-100000 @ miriworld . its . unimelb . EDU . AU>

Hi !
>  >  Are there some other proxy-server without this problem ? > 
> Why is it a problem?  Harvest cached handles it in approx the same manner 
> as cern httpd.
No, there is a quick abort option for the harvest cached. I always choose 
that - otherwise you'll get (almost) eternal stream of pictures flowing 
from some advanced sites which employ multipart/mixed animations
 > 
> the presence of Content-length: in the header which gives the correct 
> content length.  Most cgi scripts do not take the trouble to return a 
> Content-length: header, and are thus not cached.  Sometimes it is worth 
> writing cacheable script output, sometimes it is not.
Basically, you shouldn't cache cgi-bin's. Very few people always return 
the same stuff from cgi - ( obvious )
You shouldn't also cache shtml ( server side includes ) docs.
Same reason - why put burden on the server if plain doc will suffice.
> 
> #       Specify default expiry times for ftp and gopher;
> #       NEVER specify it for HTTP, otherwise documents generated by
> #       scripts get cached which is usually a bad thing.
> #
> CacheDefaultExpiry      ftp:*        7 days
> CacheDefaultExpiry      gopher:*        2 months
> CacheLastModifiedFactor   0.5
In case of harvest cache, you can ( almost) safely cache html's as well.
Anyway, you can always press 'Reload' in Netscape/Mosaic, and harvest 
cache will _correctly_ reload this page from the source

Best
	Slava
 
Slava Kritov                    * http://www.freenet.kiev.ua/scorp
Senior Internetwork Specialist  * http://elfstone.un.kiev.ua/
UN Internet Project for Ukraine * http://www.un.kiev.ua/
   *** Finger scorp @
 elfstone .
 un .
 kiev .
 ua for public PGP key ***


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