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Re: [google-gears-eng] Re: Deploying new expectation-extensions

From: Henrik Nordstrom <henrik@henriknordstrom.net>
Date: Sun, 06 Apr 2008 01:16:52 +0200
To: Charles Fry <fry@google.com>
Cc: Julian Reschke <julian.reschke@gmx.de>, Brian McBarron <bpm@google.com>, google-gears-eng@googlegroups.com, Mark Nottingham <mnot@yahoo-inc.com>, HTTP Working Group <ietf-http-wg@w3.org>
Message-Id: <1207437412.11881.64.camel@HenrikLaptop>

fre 2008-04-04 klockan 20:08 -0400 skrev Charles Fry:

> Hmm. Now this is starting to come full-circle. As I understand it the
> whole reason that Expect: 100-continue is used in conjunction with 100
> Continue responses is to ensure, as the request is finding its way to
> the origin server, that the response will be able to find its way
> back, being properly interpreted as an intermediate response. Without
> this there is the risk that a non-100-continue-aware proxy would
> interpret the 100 response as a final response.

Not really. It's more about avoiding the heuristics on how long a client
should wait for 100 Continue. But unfortutately it failed due to
HTTP/1.0 and RFC2068 being part of the picture...

> Is this not a requirement of any client-elicited 1xx response? I.e.
> can we really just send 103s when they aren't asked for, with full
> confidence that they won't break anything as they travel back to the
> client?

Yes, if the request was received as an HTTP/1.1 request. At least from a
specifications point of view. (not entirely sure about actual

Received on Saturday, 5 April 2008 23:18:54 UTC

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