Re: [XHR2] AnonXMLHttpRequest()

I raised ISSUE-114 <> so this issue does not get lost.

On Feb 3, 2010, at 1:00 AM, Jonas Sicking wrote:

> First off, note that we are talking about *user* credentials here.
> This is why Origin is not included. Origin is a website credential,
> not a user credential. CORS always include the website credentials in
> the form of Origin header and referrer.

Right, I'm saying *site* credentials (such as Origin and Referer) do not need to be stripped. Just user credentials.

> In addition to the list you mention, firefox never shares http
> keep-alive connections between requests with credentials and requests
> without. This also means that a "normal" request from for example a
> <img> or <iframe> will never share keep-alive connection with a
> credential-less CORS request.
> We do this because some protocols, notably NTLM, authenticate the
> keep-alive connection, not the individual requests, IIRC.

We do this too but only for protocols that authenticate per-connection.

> The general rule of thumb is that anything the UA adds to the request
> that the website can use to uniquely identify the request as coming
> from the users browser is a user credential. So while the UA string in
> combination with IP number can be used to make a reasonably strong
> guess as to the identity of the user, it's not strong enough to
> actually identify the user, thus it does not count as user
> credentials. But I definitely agree that we should have a normative
> list which includes the items mentioned above.


> Another thing that might be worth noting is that if the UA contains a
> HTTP cache (which most popular UAs do), the UA must never use a cached
> response that was the result of a request that was made with
> credentials, when making a request without. The same goes the other
> way around.
> I would expect these things to apply to CORS and UMP alike. Including
> the definition of user credentials.

UMP should indeed omit the same user credentials, in addition to omitting a defined set of site credentials.


Received on Wednesday, 3 February 2010 09:42:33 UTC