Subject: Re: draft-ietf-httpbis-alt-svc-02, 5. The Alt-Svc-Used HTTP Header Field

From: Julian Reschke <[email-masked]>
Date: Wed, 16 Jul 2014 15:56:31 +0200

On 2014-07-16 15:45, Kari Hurtta wrote:
>
> HTTP Alternative Services
> draft-ietf-httpbis-alt-svc-02
> July 4, 2014
> http://tools.ietf.org/html/draft-ietf-httpbis-alt-svc-02
>
>
>
> 5. The Alt-Svc-Used HTTP Header Field
> http://tools.ietf.org/html/draft-ietf-httpbis-alt-svc-02#section-5
>
>
> » Alt-Svc-Used     = ("1" / "0") *( OWS ";" OWS Alt-Svc-Used-Ext )
> » Alt-Svc-Used-Ext = token "=" ( token / quoted-string )
>
>
> What is difference of values "0" and "1" ?
>
> Example was
>
>
> »      GET /thing HTTP/1.1
> »      Host: origin.example.com
> »      Alt-Svc-Used: 1
>
>
> But if example is
>
> »      GET /thing HTTP/1.1
> »      Host: origin.example.com
> »      Alt-Svc-Used: 0
>
> is an alternate service is in use ?

I assume the intent was to make "0" mean that no alternate service was 
used; but clearly we need to state that.

-> <https://github.com/httpwg/http-extensions/issues/11>

Best regards, Julian

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