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Re: MIME boundary question
- To: ietf-822@xxxxxxxxxxxxxxxxxx
- Subject: Re: MIME boundary question
- From: John Gardiner Myers <jgm+@xxxxxxx>
- Date: Thu, 16 Feb 1995 17:27:55 -0500 (EST)
- Beak: is Not
- In-reply-to: <>
- References: <>
"John W. Noerenberg" <firstname.lastname@example.org> writes:
> John, the only implementation that I know about that can't handle
> boundaries containing substrings of other boundaries is the one from
> Frontier. What others can't handle this?
The ones I know of are metamail and mpack.
> The bnf in 1341 doesn't prohibit a boundary token from being a superset of
> a second boundary contained by the first one. It requires it to be
> different, but a superset satisfies that requirement.
The BNF in 1341 for a body-part prohibits the outer multipart's
delimiter from occuring within the body-part. This effectively
prohibits enclosed multiparts from having boundaries which have a
prefix of the enclosing mulipart's boundary.
This rule in the BNF is necessary to keep the multipart grammar from
being ambiguous. Otherwise, when you see something that looks like a
delimiter, you don't know whether it should parse as a delimiter or as
part of the enclosed body-part.
_.John G. Myers Internet: jgm+@CMU.EDU