def _get_file_magic_name(self, buffer):
        """
        Return the filetype guessed for a buffer
        :param buffer: bytes
        :return: str of filetype
        """
        default = "Unknown"
        ftype = None

        try:
            # Magic is optional
            import magic
        except ImportError:
            return default

        try:
            # There are several implementations of magic,
            # unfortunately all called magic
            # We use this one: https://github.com/ahupp/python-magic/
            getattr(magic, "MagicException")
        except AttributeError:
            # Looks like no magic was installed
            return default

        try:
            ftype = magic.from_buffer(buffer[:1024])
        except magic.MagicError as e:
            log.exception("Error getting the magic type!")
            return default

        if not ftype:
            return default
        else:
            return self._patch_magic(buffer, ftype)
Return the filetype guessed for a buffer
        :param buffer: bytes
        :return: str of filetype