File: echo.py

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##
# Copyright (c) 2013-2016 Apple Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##

"""
Echo protocol.
"""

__all__ = ["EchoProtocol"]

from twisted.internet.protocol import Protocol


class EchoProtocol(Protocol):
    """
    Say what you hear.
    """

    def dataReceived(self, data):
        """
        As soon as any data is received, write it back.
        """
        self.transport.write(data)