[Email-SIG] I miss size() (and some latest frustration)

[R. David Murray]

On Fri, 25 Mar 2011 16:10:03 -0400, Barry Warsaw <barry at python.org> wrote:
> >For message parsing, it seems like allowing registered callbacks for various
> >pieces would be handy... "Call me when you parse this type of a header" (or
> >body part, etc.).
> 
> I think David's design documents to allow for extensions and callbacks based
> on the content-types of things seen.

Effectively, yes.  The idea is that there is a factory that gets called
whenever a mime content type or a header is instantiated, so that
factory can do whatever magic it would like.  The standard factories will
have a lookup table for the factories for individual types, so you can
alternately use a copy of the standard factory with just the headers or
mime types you are interested in hooked.

We'll want to refine the design when I get near to actually implementing
it.

--
R. David Murray           http://www.bitdance.com