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Re: draft-ietf-tls-http-upgrade reissued

From: John Stracke <francis@ecal.com>
Date: Mon, 08 May 2000 10:00:04 -0400
Message-ID: <3916C864.21FB97BB@ecal.com>
To: IETF HTTP List <http-wg@hplb.hpl.hp.com>
Julien Pierre wrote:

> If the client tries to upgrade to TLS on every request, it will fail 99% of the time,
> because servers don't support it.

Servers that don't support it ignore it, because RFC-2616 doesn't provide an error code to
mean "I don't understand that Upgrade:".  (I just tried it on Apache 1.3.9 and 1.3.12, NES
3.6, and IIS 5.0; they all behaved exactly the same with and without "Upgrade: foo".) This
means that a client that sends the Upgrade: all the time won't break anything; it will cost
a few extra bytes, but not the extra round trips you're talking about.

|John Stracke    | http://www.ecal.com |My opinions are my own.  |
|Chief Scientist |===============================================|
|eCal Corp.      |The cheapest, fastest, most reliable components|
|francis@ecal.com|of a computer system are those that aren't     |
|                |there.--Gordon Bell                            |
Received on Monday, 8 May 2000 15:01:12 UTC

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