def set_etag_header(self):
        etag = self.compute_etag()
        if etag is not None:
            self.set_header("Etag", etag)
Sets the response's Etag header using ``self.compute_etag()``.
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/RequestHandler.set_etag_header