Write unbuffered data to the client.

def write(self, chunk):
        """Write unbuffered data to the client."""
        if self.chunked_write and chunk:
            buf = [hex(len(chunk))[2:], CRLF, chunk, CRLF]
            self.conn.wfile.sendall("".join(buf))
        else:
            self.conn.wfile.sendall(chunk)