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# Copyright 2018 The gRPC Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Example gRPC server that gets/sets metadata (HTTP2 headers)"""
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from __future__ import print_function
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from concurrent import futures
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import logging
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import grpc
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import helloworld_pb2
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import helloworld_pb2_grpc
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class Greeter(helloworld_pb2_grpc.GreeterServicer):
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def SayHello(self, request, context):
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for key, value in context.invocation_metadata():
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print('Received initial metadata: key=%s value=%s' % (key, value))
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context.set_trailing_metadata((
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('checksum-bin', b'I agree'),
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('retry', 'false'),
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))
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return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
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def serve():
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server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
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helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
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server.add_insecure_port('[::]:50051')
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server.start()
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server.wait_for_termination()
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if __name__ == '__main__':
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logging.basicConfig()
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serve()
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