W3C home > Mailing lists > Public > ietf-http-wg@w3.org > April to June 2010

Re: [#211] Query string cacheability

From: Mark Nottingham <mnot@mnot.net>
Date: Wed, 2 Jun 2010 15:04:26 +1000
Cc: "Julian F. Reschke" <julian.reschke@gmx.de>, Roy Fielding <fielding@gbiv.com>, Eric Lawrence <ericlaw@exchange.microsoft.com>
Message-Id: <809B2638-B4F0-4C5E-BD5D-5383CCAB1358@mnot.net>
To: HTTP Working Group <ietf-http-wg@w3.org>

Add to the end of p6  Calculating Heuristic Freshness):

Note that RFC2616 required that caches not calculate heuristic freshness for URLs with query components (i.e., those containing '?'). In practice, this has not been widely implemented. Therefore, servers are encouraged to send explicit directives (e.g., Cache-Control: no-cache) if they wish to preclude caching.

On 21/05/2010, at 4:16 PM, Mark Nottingham wrote:

> Now <http://trac.tools.ietf.org/wg/httpbis/trac/ticket/211>.
> On 21/05/2010, at 12:09 AM, Julian Reschke wrote:
>> On 20.05.2010 00:09, Roy T. Fielding wrote:
>>> I would prefer to remove the paragraph from the spec.  It was not true when
>>> it was added, it isn't true now, and it won't be true tomorrow.
>>> ....Roy
>> How about removing that, but including a statement that for historic reasons, some caches will default to non-cacheable, thus it might be needed to explicitly specify an expiration time?
>> Best regards, Julian
> --
> Mark Nottingham     http://www.mnot.net/

Mark Nottingham     http://www.mnot.net/
Received on Wednesday, 2 June 2010 05:04:27 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Friday, 27 April 2012 06:51:19 GMT