Re: [squid-users] CONNECT & tcp timeouts

Charles,

I don't know if this helps but IE works a little
differently when using PAC files.

http://support.microsoft.com/default.aspx?scid=KB;en-us;271361&

Kind Regards

Jeff Smith

--- Charles Bruneteau <charles.bruneteau@renault.fr>
wrote:
> Marc Elsen wrote:
> >
> > Charles Bruneteau wrote:
> > > I face a "subtle" issue with the way squid
> (2.2S5 & 2.5S1) handles tcp
> > > connection timeout with the CONNECT method:
> > > - 'GET ...' to a down webserver produces a 504
> status code
> > > - 'CONNECT ...' to a down webserver doesn't:
> once the tcp timeout occured squid
> > > simply closes the tcp session (FIN) with the
> client.
> > > Is there a reason ?
> >
> > Don't know, but I think that 5xx, 4xx, etc. are
> http status codes only
> > and are not related to https connections.
>
> I guess that's not so easy: 403, 407 etc. are
> related to every methods.
> For instance squid do ask for proxy authentication
> with a 407 status code.
>
> > > With Internet Explorer, proxy authentication and
> a proxypac listing several
> > > proxies for redundancy it generates some issues:
> IE understand this session
> > > ending as a signal to use another proxy (as if
> the proxy was down).
> > > Some other proxies would generate a 504 or 500
> error (NetApp for instance).
> >
> > Hm, I would assume that proxy selection is
> unrelated to a http or
> > https site being down.
>
> I agree: it should not.
>
> > I would not like my browser to change proxy, if
> one site either
> > http or https is down.
> >
> > Or, proxy selection algorythm, is unrelated to
> any states
> > encountered with http or https connectivity for
> a specific proxy.
>
>
> Squid simply shuts the TCP session, without any HTTP
> notice.
> >From the HTTP client point of view that's not a
> great partner.
> Nevertheless IE is a bit more nasty here: even if
> some other simultaneous
> sessions are ok with the same proxy, the first https
> requests encountering such
> a timeout will cause the use of a new proxy.
>
> I didn't find any information about the behaviour
> proxies should have in such
> case.
>
> Regards
> C.

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Received on Thu Dec 26 2002 - 15:46:35 MST