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Re: UTF-8 or ASCII Header Names?

From: Willy Tarreau <w@1wt.eu>
Date: Wed, 14 Aug 2013 07:15:30 +0200
To: James M Snell <jasnell@gmail.com>
Cc: "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
Message-ID: <20130814051530.GZ20347@1wt.eu>
On Tue, Aug 13, 2013 at 03:08:13PM -0700, James M Snell wrote:
> https://github.com/http2/http2-spec/issues/231
> 
> The current header compression spec allows for UTF-8 encoded header
> names without any character restrictions. The main HTTP/2 spec,
> however, states that header names are "strings of ASCII characters"
> (also without specifying any character restrictions). We need to be
> clearer.
> 
> Recommend that we specify in both the HTTP/2 and Header Compression
> spec that header names MUST conform to:
> 
>     LOWERALPHA = %x61-7A
>     header-name = "!" / "#" / "$" / "%" / "&" / "'" /
>                   "*" / "+" / "-" / "." / "^" / "_" /
>                   "`" / "|" / "~" / DIGIT / LOWERALPHA
> 
> Which is the all-lower-case equivalent to the header-name definition
> currently in httpbis.

Agreed.

Willy
Received on Wednesday, 14 August 2013 05:15:55 UTC

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