Re: Issue 194: restricting allowed characters in quoted-pair

So, strict BNF with a note in prose that old implementations may quote  
other characters? Works for me.

On 16/09/2009, at 4:23 PM, Roy T. Fielding wrote:

> On Sep 15, 2009, at 10:43 PM, Mark Nottingham wrote:
>> Yeah, what Julian said; I'd like to do this, but am concerned about  
>> what it would mean.
> It would mean that sending other quoted characters would no
> longer comply with the protocol.  Since I don't know of any
> implementations that quote other characters, that's fine with me.
> It also means that recipients of other quoted characters should
> consider the backslash to be used in error, which is probably a
> good thing since the only reason to backslash other characters
> on purpose is to trigger a security hole.
>> Can we keep it (relatively) open in BNF, and caution against  
>> quoting anything but DQUOTE in prose?
>> Not a great solution, but...
> We could, but how does that help implementations?  I'd rather
> be more conservative in the ABNF and let Postel's Law influence
> the prose.  I suspect that other uses of backslash are not
> intended to be quoting in any case, so the recipient is probably
> better off treating them as two characters.  e.g., DOS pathnames.
> ....Roy

Mark Nottingham

Received on Wednesday, 16 September 2009 06:35:37 UTC