rfc2388:parse-mime requires Hunchentoot package to parse multipart/form-data. This package provides a method parse-mime only for Clack.
Parses MIME entities, returning them as a list. Each element in the
list is of form: (body headers), where BODY is the contents of MIME
part, and HEADERS are all headers for that part. BOUNDARY is a string
used to separate MIME entities.