def get_file(self, fid):
        """Get file from WeedFS.

        Returns file content. May be problematic for large files as content is
        stored in memory.

        Args:
            **fid**: File identifier <volume_id>,<file_name_hash>

        Returns:
            Content of the file with provided fid or None if file doesn't
            exist on the server

        .. versionadded:: 0.3.1
        """
        url = self.get_file_url(fid)
        return self.conn.get_raw_data(url)