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[whatwg] Proposal for improved handling of '#' inside of data URIs

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Sat, 10 Sep 2011 20:32:14 -0400
Message-ID: <4E6C018E.4040902@mit.edu>
On 9/10/11 7:44 PM, Adam Barth wrote:
> It seems like a bad idea to require look-ahead to parse data URLs.  Is
> there some reason we can't just treat the whole payload as part of the
> document?

Yes.  It breaks the xlink:href='#greenRect' sort of thing in SVG, unless 
you do some sort of other bizarre special-casing that violates the URI RFCs.

Of course WebKit does in fact do that sort of thing in SVG; see 
https://bugs.webkit.org/show_bug.cgi?id=63283 for a more egregious 
example...  But if you fixed those bugs, then you'd break things that 
should actually work, unless you actually allow data: URIs with a 
fragment identifier (which once again is required by the RFCs).

As it is, last I checked WebKit's behavior here is inconsistent; for a 
data: URI containing a '#' it in many cases treats the part after the 
'#' as _both_ part of the content and a fragment identifier  Again, all 
sorts of broken.

Received on Saturday, 10 September 2011 17:32:14 UTC

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