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Re: #282: Recommend minimum sizes for protocol elements

From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 2 May 2011 09:28:28 +0200 (CEST)
To: Mark Nottingham <Mnot@mnot.net>
cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, Willy Tarreau <w@1wt.eu>, HTTP Working Group <ietf-http-wg@w3.org>
Message-ID: <alpine.DEB.2.00.1105020925420.22668@tvnag.unkk.fr>
On Mon, 2 May 2011, Mark Nottingham wrote:

>> I think that we should recommend that clients not send a U-A header at all, 
>> to enourage servers to DTRT with respect to content portablity.
> Agreed, but from discussing this (at length) with browser vendors, they're 
> unwilling to change UA and other headers much, because of potential interop 
> problems with sites that depend upon them.

I can confirm that not using a user-agent header at all gives a certain amount 
of problems. I can't give any specific numbers, but libcurl does its default 
requests without such a header and that is known to cause grief every now and 

I recall that even Apache has (had?) some set of UA-based browser checks that 
check for known faulty browsers to be able to do the necessary work-arounds.


  / daniel.haxx.se
Received on Monday, 2 May 2011 07:29:33 UTC

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