code: def parse(self, mimetypes):
          
  
          self._parse_top_level_content_type()
  
          link = 'tools.ietf.org/html/rfc2388'
          parts = cgi.FieldStorage(
              fp=self.req.stream,
              environ=self.req.env,
          )
  
          if not parts:
              self.fail('A payload in the body of your request is required '
                        '& must be encapsulated by the boundary with proper '
                        'headers according to RFC 2388', link)
          elif len(parts) > 1:
              self.fail('Currently, only 1 upload at a time is allowed. Please '
                        'break up your request into %s individual requests & '
                        'retry' % len(parts), link)
          else:
              self._parse_part(parts.list[0], mimetypes)
              return parts
docs: Invoke the RFC 2388 spec compliant parser