RE: 304 Not modified

From: Kamiski Nicolas <>
Date: Thu, 30 Apr 1998 17:49:47 +0200

In the case the default parent cache of a squid proxy is something like
Altavista firewall ( another non icp proxy )
Are object retrieved from source to parent proxy or just the header?.

        -----Message d'origine-----
        De: Marc van Selm []
        Date: jeudi 23 avril 1998 18:12
        Objet: Re: 304 Not modified

        At 11:56 AM 4/23/98 +0200, Riccardo Cozzani wrote:
>Hi all,
>I have just install squid 1.2.beta19-1. I edited squid.conf
like my old
>one, but when I try to fetch some documents I had previous
fetched, I
>receive this message:
>304 Not modified
>The document has not been modified, you can use your local
copy. HTTP/1.0
>304 Not modified Date: Thu,
>23 Apr 1998 09:48:27 GMT Server: WebSitePro/1.1h Accept-ranges:
>Content-type: text/html
>Content-length: 162 X-Cache: MISS from
>Could you please let me know what I'm doing wrong?

        Nothing wrong but the request was an IMS (if modified since) to
the server.
        The server replied "your cached file is still OK so use it".
When files are
        fresh this request to the server isn't done. If a file is stale
an IMS is
        done and the server could decide to tell you that's still OK (a
proxy or a
        browser has to validate the file with the server in those cases)


        Marc van Selm
        NATO C3 Agency
        Communication Systems Division, A-Branch
Received on Thu Apr 30 1998 - 09:01:11 MDT

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