[whatwg] Origins, reprise

Ian Hickson ian at hixie.ch
Tue Jun 2 02:23:34 PDT 2009

On Fri, 9 Jan 2009, Boris Zbarsky wrote:
> I've recently come across another issue with the origin definition.
> Right now, this says:
> 1) If url does not use a server-based naming authority, or if parsing
>    url failed, or if url is not an absolute URL, then return a new
>    globally unique identifier.
> 2) Return the tuple (scheme, host, port).
> (with some steps to determine the tuple thrown in).
> In Gecko, we actually have three classes of URIs for security purposes:
> 1) Those for which the URI is not same-origin with anything (the
>    globally unique identifier case).
> 2) Those for which the URI is same-origin with anything with the same
>    scheme+host+port.
> 3) Those for which the URI is same-origin with itself but no other URI
>    (not to be confused with the globally unique identifier case).
> It would be nice if we could express this in terms of the origin setup, but it
> doesn't seem to me like that's workable as things stand...

On Fri, 9 Jan 2009, Adam Barth wrote:
> Can you give an example of this kind of URI?

On Fri, 9 Jan 2009, Boris Zbarsky wrote:
> Yes, of course.  IMAP URIs [1] have an authority component which is the 
> IMAP server.  At the same time, each message needs to be treated as a 
> separate trust domain.
> Similar for the proposed nntp URIs [2].
> [1] http://www.rfc-editor.org/rfc/rfc5092.txt
> [2] http://tools.ietf.org/html/draft-ellermann-news-nntp-uri-11

I've updated the algorithm for deriving an Origin from a URL in the HTML5 
spec to handle this case.

Adam: I believe that you are editing a draft that also has this algorithm; 
hat parts of HTML5 should I be stripping here? Will this particular 
algorithm belong in your draft or HTML5? (If the former, can you take this 
change also?)

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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