# Copyright 2023 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. """The Python AsyncIO implementation of the GRPC helloworld.Greeter client.""" import asyncio import contextvars import logging import random import grpc import helloworld_pb2 import helloworld_pb2_grpc test_var = contextvars.ContextVar('test', default='test') async def run() -> None: async with grpc.aio.insecure_channel('localhost:50051') as channel: stub = helloworld_pb2_grpc.GreeterStub(channel) rpc_id = '{:032x}'.format(random.getrandbits(128)) metadata = grpc.aio.Metadata(('client-rpc-id', rpc_id),) print(f"Sending request with rpc id: {rpc_id}") response = await stub.SayHello(helloworld_pb2.HelloRequest(name='you'), metadata=metadata) print("Greeter client received: " + response.message) if __name__ == '__main__': logging.basicConfig() asyncio.run(run())