[Twisted-Python] Twisted file upload

[Syver Enstad]

If there is a better way to get the filename of a posted file than the
code below, please tell me:

        """ this is a workaround because
        twisted web doesn't make the filename accessible
        on a form with enctype='multipart/form-data'
        
        """

        savedPosition = request.content.tell()
        try:
            request.content.seek(0)
            request.content.readline()
            match = re.search(r'filename="([^"]+)"',
                              request.content.readline())
            if match:
                return match.group(1)
            else:
                return None
        finally:
            request.content.seek(savedPosition)