def exists(self, filename):
        dest = os.path.join(self.root, filename)
        return os.path.exists(dest)
Handles new client requests readable from 'read'.
dataset/ETHPy150Open lepture/flask-storage/flask_storage/local.py/LocalStorage.exists--crossover with--dataset/ETHPy150Open google/grr/grr/server/data_server/data_server.py/DataServerHandler.HandleClient