- From: Shane Wiley <wileys@yahoo-inc.com>
- Date: Tue, 7 Feb 2012 11:15:56 -0800
- To: Matthias Schunter <mts@zurich.ibm.com>, "public-tracking@w3.org" <public-tracking@w3.org>
Matthias, I believe this follows the same proposed text you provided several weeks ago. Response headers SHOULD be optional with the clear understanding both user agents and users will assume a site without response headers does NOT support DNT and will react accordingly (perhaps not using that site). - Shane -----Original Message----- From: Matthias Schunter [mailto:mts@zurich.ibm.com] Sent: Tuesday, February 07, 2012 6:01 AM To: public-tracking@w3.org Subject: ISSUE-106: Responses on cached objects Hi! My view on ISSUE-106: - During Brussels I discovered that cached objects can be used for tracking - Saying "cached resources imply 'no tracking' does not do the job Reasoning: If receiving a cached object (with http indication that it can be cached) without a DNT response, then the user cannot distinguish whether a site does not implement DNT (and may use this URL for tracking) or whether a site follows DNT and implies 'no tracking' Consequence: DNT response headers should be required for cached objects. Whatever language we decide to use for the header in general (should vs must; see ISSUE-121) should also apply for cached objects. Opinions? Regards, matthias
Received on Tuesday, 7 February 2012 19:18:56 UTC