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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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48 lines
1.7 KiB
48 lines
1.7 KiB
# 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 client that gets/sets metadata (HTTP2 headers)""" |
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from __future__ import print_function |
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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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def run(): |
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# NOTE(gRPC Python Team): .close() is possible on a channel and should be |
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# used in circumstances in which the with statement does not fit the needs |
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# of the code. |
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with grpc.insecure_channel('localhost:50051') as channel: |
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stub = helloworld_pb2_grpc.GreeterStub(channel) |
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response, call = stub.SayHello.with_call( |
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helloworld_pb2.HelloRequest(name='you'), |
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metadata=( |
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('initial-metadata-1', 'The value should be str'), |
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('binary-metadata-bin', |
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b'With -bin surffix, the value can be bytes'), |
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('accesstoken', 'gRPC Python is great'), |
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)) |
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print("Greeter client received: " + response.message) |
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for key, value in call.trailing_metadata(): |
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print('Greeter client received trailing metadata: key=%s value=%s' % |
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(key, value)) |
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if __name__ == '__main__': |
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logging.basicConfig() |
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run()
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