From: Mike Ayers (mike.ayers@tumbleweed.com)
Date: Wed Dec 15 2004 - 11:47:27 CST
> From: Peter Kirk [mailto:peterkirk@qaya.org]
> Sent: Wednesday, December 15, 2004 3:52 AM
> But surely octets 0x80 to 0x9f are (at least mostly) invalid
> in ISO 8859?
They are in fact valid. However, because they are control
characters, they are not considered displayable.
> While some applications may choose to process
> these invalid characters as if they were valid, but display
> them as boxes or not at all (and this is a security risk),
> others and especially those concerned with security do in
> fact treat them as errors, in one way or another.
> For example, Marcin noted for Mozilla:
>
> >If a filename ... can be
> >converted but contains characters like 0x80-0x9F in ISO-8859-2, they
> >are displayed as question marks and the file is inaccessible.
This is a good policy and is what Lars should consider. It places
the responsibility for the filename where it belongs: on the file's creator.
> It should be treated as a general issue with ALL locales and
> character sets (with perhaps just a few exceptions) that not
> all sequences of octets represent valid character strings.
> UTF-8 is by no means a special case here.
Exactly. Which underscores just how silly these threads are.
/|/|ike
"Tumbleweed E-mail Firewall <tumbleweed.com>" made the following
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