Re: [squid-users] "Accept-Encoding" header

May I consider the any version of Squid never uses HTTP/1.1 for outbound
requests?

Thanks,
Slava

From: "Henrik Nordstrom" <hno@squid-cache.org>

> Slava Bizyayev wrote:
>
> > Here we see that Squid received the HTTP/1.1 request and transferred it
as
> > HTTP/1.0 to the following (MS) Proxy.
> >
> > As far as I understand the logics of proxy, it should make the reverse
> > protocol transformation for outbound response. Am I right?
>
> A HTTP proxy must downgrade requests and replies to the highest HTTP
> version it supports. Squid is a HTTP/1.0 proxy with support for many
> features from HTTP/1.1.
>
> > The possible upgrade of the HTTP version seems very unsafe for the
> > request processing. For example, MSIE-6.0 could be configured to work
> > HTTP/1.0 for some special reason.
>
> Any proxy doing upgrades of requests to a higher version than supported
> by the requesting browser must also do downgrades of replies. Messy
> business indeed, but needed for proper caching of results in HTTP/1.1.
>
> If you consider that there may be a mix of HTTP/1.0 and HTTP/1.1 clients
> accessing the same cache you see why a HTTP/1.1 proxy cache needs to
> update all requests to HTTP/1.1, and why the same cache must also be
> fully prepared to downgrade any cached replies (both cached and
> uncached, no difference) to the level supported by the requestor..
>
> Regards
> Henrik
>
Received on Wed Jun 19 2002 - 22:30:23 MDT