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Diffstat (limited to 'examples/python/metadata/metadata_server.py')
-rw-r--r-- | examples/python/metadata/metadata_server.py | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/examples/python/metadata/metadata_server.py b/examples/python/metadata/metadata_server.py new file mode 100644 index 0000000000..a4329df79a --- /dev/null +++ b/examples/python/metadata/metadata_server.py @@ -0,0 +1,56 @@ +# Copyright 2018 The gRPC Authors +# +# 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. +"""Example gRPC server that gets/sets metadata (HTTP2 headers)""" + +from __future__ import print_function +from concurrent import futures +import time +import logging + +import grpc + +import helloworld_pb2 +import helloworld_pb2_grpc + +_ONE_DAY_IN_SECONDS = 60 * 60 * 24 + + +class Greeter(helloworld_pb2_grpc.GreeterServicer): + + def SayHello(self, request, context): + for key, value in context.invocation_metadata(): + print('Received initial metadata: key=%s value=%s' % (key, value)) + + context.set_trailing_metadata(( + ('checksum-bin', b'I agree'), + ('retry', 'false'), + )) + return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name) + + +def serve(): + server = grpc.server(futures.ThreadPoolExecutor(max_workers=10)) + helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server) + server.add_insecure_port('[::]:50051') + server.start() + try: + while True: + time.sleep(_ONE_DAY_IN_SECONDS) + except KeyboardInterrupt: + server.stop(0) + + +if __name__ == '__main__': + logging.basicConfig() + serve() |