Bug 74610 - Remove UTF-7 and UTF-32 support
Summary: Remove UTF-7 and UTF-32 support
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Platform (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-12-15 08:34 PST by Anne van Kesteren
Modified: 2023-05-29 02:18 PDT (History)
8 users (show)

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Description Anne van Kesteren 2011-12-15 08:34:25 PST 
I'm not sure what the right component is or who to copy on this bug exactly, but per HTML UTF-7 and UTF-32 should not be supported. Gecko and Presto have disabled these already. WebKit/Chromium would preferably follow us here.
Comment 1 Alexey Proskuryakov 2011-12-15 13:47:38 PST 
Do you have a test case for out UTF-7 support? That would be a bug, as we were supposed to have blocked it long ago, <http://trac.webkit.org/changeset/49487>.

What is the rationale to ban UTF-32?
Comment 2 Theresa O'Connor 2011-12-15 13:53:22 PST 
ap: from the HTML spec ( http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#character-encodings-0 ):

Support for UTF-32 is not recommended. This encoding is rarely used, and frequently implemented incorrectly.

This specification does not make any attempt to support EBCDIC-based encodings and UTF-32 in its algorithms; support and use of these encodings can thus lead to unexpected behavior in implementations of this specification.
Comment 3 Alexey Proskuryakov 2011-12-15 14:04:11 PST 
So, the rationale is "rarely used, and frequently implemented incorrectly".
Comment 4 Masahiro Yamada 2013-03-06 07:45:19 PST 
Support of UTF-7 is removed by bug 29078.
But other unrecommended encoding are still supported.
(CESU-8, UTF-7, BOCU-1 and SCSU)

Matrix of supported encoding names per browser is here:
http://l0.cm/encodings/table/
Comment 5 Anne van Kesteren 2023-05-29 02:18:23 PDT 
What is UTF7Encoding() about? Is that for WebKit embedders? If so, I suspect this is fixed as UTF-7 is blocklisted somewhere.