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From c...@decus.org (Rodent of Unusual Size)
Subject Re: [PATCH] ETags and Last-Modified, take 3
Date Tue, 02 Sep 1997 11:13:02 GMT
>From the fingers of Dean Gaudet flowed the following:
>
>On Fri, 29 Aug 1997, Alexei Kosut wrote:
>>
>> I don't think the script should be killed (some CGI scripts will do
>> important things during/after sending an entity). Maybe send it a SIGURG or
>> some other non-terminal signal, to tell it "hey, stop it, I'm not sending
>> anything anymore"?
>
>It is killed off without reading anything if a HEAD request is performed. 
>This is essentially the same ... isn't it?  I'll look at the patch later.

    Grey-area time..

    The HEAD method, and the appropriate action for processing, is
    defined in both HTTP/1.0 and 1.1.  It seems reasonable for the
    server to expect the script to have Done The Right Thing based upon
    REQUEST_METHOD, and nuke it upon receipt of its headers.

    The conditional stuff, though, is all HTTP/1.1 only (I think).  Is
    it right for the server to expect a potentially 1.0 script to have
    done the necessary calculations?  The script might think it's
    supposed to continue, and be doing things which oughtn't to be
    interrupted.

    I think I'm leaning toward killing it and slurping anything it sent,
    because scripts should be written with extreme-prejudice termination
    in mind anyway.

    How about this: we do conditional processing IFF the script returns
    a "Status: 200" or no Status: at all?  If it returns anything else
    we assume the script knew what it was doing, just pass it along, and
    let things proceed normally.  If we did the conditional processing,
    and it failed, we kill the script.  I think I see some flaws in
    this, but just for discussion..

    Maybe something that should go into the "new" CGI spec is a
    script-response that says, "hey, I know HTTP/1.1".

    #ken    :-)}

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