class Rack::Multipart::Parser

def self.parse(io, content_length, content_type, tmpfile, bufsize, qp)
  return EMPTY if 0 == content_length
  boundary = parse_boundary content_type
  return EMPTY unless boundary
  if boundary.length > 70
    # RFC 1521 Section 7.2.1 imposes a 70 character maximum for the boundary.
    # Most clients use no more than 55 characters.
    raise BoundaryTooLongError, "multipart boundary size too large (#{boundary.length} characters)"
  end
  io = BoundedIO.new(io, content_length) if content_length
  parser = new(boundary, tmpfile, bufsize, qp)
  parser.parse(io)
  parser.result
end