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Re: XHR header blacklist rationale

From: Bjoern Hoehrmann <derhoermi@gmx.net>
Date: Tue, 27 May 2008 18:05:58 +0200
To: Julian Reschke <julian.reschke@gmx.de>
Cc: "public-webapi@w3.org" <public-webapi@w3.org>
Message-ID: <i1co34t107lkl7ca74fkrbep9ppnig4ltu@hive.bjoern.hoehrmann.de>

* Julian Reschke wrote:
>I also don't see why the client shouldn't have the option to set the 
>Expect header; keep in mind that although 100-continue is the only 
>expectation code defined in RFC2616, other codes can be defined as well, 
>and it's not XHR's business to close that door.

I think whether the client uses `Expect: 100-continue` is a decision
similar to deciding whether the client uses, say, a Transfer-Encoding.
The client may also be specifically configured to use a different
version of the protocol, like IE is configured to talk HTTP/1.0 to
proxy servers by default. Besides, the client may not even handle the
100-continue response properly.
Björn Höhrmann · mailto:bjoern@hoehrmann.de · http://bjoern.hoehrmann.de
Weinh. Str. 22 · Telefon: +49(0)621/4309674 · http://www.bjoernsworld.de
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Received on Tuesday, 27 May 2008 16:13:27 UTC

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