- From: Roy T. Fielding <fielding@gbiv.com>
- Date: Mon, 10 Oct 2011 16:45:57 -0700
- To: Tom Lowenthal <tom@mozilla.com>
- Cc: "public-tracking@w3.org" <public-tracking@w3.org>
Note that this would require all responses from that server to disable shared caching ("Vary: DNT"). I think that is a non-starter. If any DNT response is given, it should be restricted to responses that are already intended to be non-cacheable (e.g., custom content and advertising placements). ....Roy On Oct 10, 2011, at 4:25 PM, Tom Lowenthal wrote: > Proposal to the W3C Tracking Protection Working Group > Authored by Thomas Lowenthal, Mozilla > Associated with [Action > 13](http://www.w3.org/2011/tracking-protection/track/actions/13) > > > When a server receives a request in which the DNT header is present, any > response **must** include a header of the form: > >> DNT:AB > > where: > - "A" is the the value of the header that the server received, and > - "B" is a statement by the server about how it will act, where: > -"0" represents "will act as if the DNT signal is not present", and > -"1" represents "will act as if the DNT signal is present". > > Examples: > - A client sends a request with "DNT:1". The server knows that this user > has previously agreed to be tracked in exchange for a delicious scone. > The server responds with "DNT10", thereby stating that the user has > requested not to be tracked, but the server will still track this user. > - A client sends a request with "DNT:1". The server responds with > "DNT:11", thereby stating that they have received, and will honor the > user's request not to be tracked. > - A client sends a request with "DNT:0". The server protects the privacy > of all users equally, and responds with "DNT:01", thereby stating that > the server will not track the user. >
Received on Monday, 10 October 2011 23:46:20 UTC