On Wed, 2002-09-04 at 14:03, Alex Rousskov wrote:
> On Wed, 4 Sep 2002, Henrik Nordstrom wrote:
>
> > After a 101 response the proxy must effectively switch to tunnel mode
> > unless it knows the new protocol.
>
> A proxy also has a choice to not "forward" Upgrade header if the proxy
> does not support the described protocol switching mechanism. In fact,
> it is probably the best choice because tunneling may not be enough for
> some protocols. Upgrade is a hop-by-hop header.
It's not a choice: 13.5.1 states that hop by hop headers 'are not stored
by caches or forwarded by proxies'.
Rob
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