- From: Anne van Kesteren <annevk@opera.com>
- Date: Mon, 20 Sep 2010 13:58:19 +0200
- To: "HTTP Working Group" <ietf-http-wg@w3.org>, "Mark Nottingham" <mnot@mnot.net>
On Mon, 20 Sep 2010 11:14:48 +0200, Mark Nottingham <mnot@mnot.net> wrote:
> [...]
>
> Because this field is usually sent on every request a user-agent makes,
> implementations are encouraged not to include needlessly fine-grained
> detail, and to limit (or even prohibit) the addition of subproducts by
> third parties. Overly long and detailed User-Agent field values make
> requests larger and can also be used to identify ("fingerprint") the
> user against their wishes.
Having this is great I think. I think we should also give advice to people
using the header (i.e. against user-agent sniffing), similar to what HTML5
does for navigator.userAgent:
http://whatwg.org/C#client-identification
(HTML5 should probably also mention the fingerprinting issue.)
--
Anne van Kesteren
http://annevankesteren.nl/
Received on Monday, 20 September 2010 11:58:56 UTC