Quoth ludo@gnu.org (Ludovic Courtès):
> Hello,
>
> Sebastian Tennant <sebyte@smolny.plus.com> writes:
>
>> Content-Disposition is mandatory, but Content-Type is optional
>> (defaulting to text/plain) as is Content-Transfer-Encoding, so the
>> "header part" of any given MIME part may be a single line or it may be
>> three.
>
> Then I presume this could be read line-by-line as strings (using
> `read-line' from `(ice-9 rdelim)') until the end-of-header marker is
> reached.  The remaining data would be read using `uniform-vector-read!'
> or some such.

Problem solved.  With this patch applied to cgi.scm in ttn's (www cgi)
module, uploading of binary data now works with Guile 1.8.

In the end it was simply a case of splitting each part into a header
section and value section using string-contains and substring rather
than match:prefix and match:suffix.

Thanks for all your help.

Seb
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