Bug 18396 - Encoding Sniffing Algorithm: Add an XML check as a step zero
Encoding Sniffing Algorithm: Add an XML check as a step zero
Status: NEW
Product: HTML WG
Classification: Unclassified
Component: HTML5 spec
unspecified
PC All
: P2 normal
: ---
Assigned To: This bug has no owner yet - up for the taking
HTML WG Bugzilla archive list
http://dev.w3.org/html5/spec/Overview...
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Reported: 2012-07-25 12:31 UTC by Leif Halvard Silli
Modified: 2013-02-08 22:52 UTC (History)
5 users (show)

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Description Leif Halvard Silli 2012-07-25 12:31:00 UTC
Proposal: Extend the encoding sniffing algorithm by adding a new,
          explicit step zero, like so:

     0. If the document is an XML document, abort these steps.

Justification.

    By extending the algorithm this way, then there is an *explicit* 
step to 'jump out of the algorithm if XML' - for which it would also be 
possible write test cases.

    Currently, and especially if the XML document lives in a 'nested 
browsing context'[1], then (unless there is a BOM) some browsers let 
the XML doc default to the encoding of the 'parent browsing context' 
instead of letting it default to the default encoding of the XML format 
(UTF-8). Webkit/Chromium/Opera have this error. Firefox do not have 
this error. I did not test IE9/10 yet, but suspect they are more on 
Firefox' side. Regarding defaulting to the encoding of the parent 
browsing context, then [see bug #foo and see bug #bar]

More data in my related blog post.[2]

[1] http://dev.w3.org/html5/spec/Overview#nested-browsing-context
[2] http://målform.no/blog/white-spots-in-html5-s-encoding-sniffing-algorithm