Parsing multipart MIME

["Darío Mariani" <dmarian@fi.uba.ar>]

Hello:
   I'm building a minimal MIME parser, mainly to separate the parts in a 
multipart/form-data in a web POST. I was wondering if anyone made the 
regular expression for interpreting it. I thought of this:

multip  ::= start anychar* (delim anychar*)* end?

anychar ::= <any character including \0>
delim   ::= <delimiter>
start   ::= "--" delim "\r\n"
middle  ::= "\r\n--" delim "\r\n"
end     ::= "\r\n--" delim "--"

   I have little experience with grammars so this expression may be 
wrong. Any ideas? thanks,

         Darío

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