1# Copyright 2023 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""The Python AsyncIO implementation of the GRPC helloworld.Greeter client.""" 15 16import asyncio 17import contextvars 18import logging 19import random 20 21import grpc 22import helloworld_pb2 23import helloworld_pb2_grpc 24 25test_var = contextvars.ContextVar("test", default="test") 26 27 28async def run() -> None: 29 async with grpc.aio.insecure_channel("localhost:50051") as channel: 30 stub = helloworld_pb2_grpc.GreeterStub(channel) 31 rpc_id = "{:032x}".format(random.getrandbits(128)) 32 metadata = grpc.aio.Metadata( 33 ("client-rpc-id", rpc_id), 34 ) 35 print(f"Sending request with rpc id: {rpc_id}") 36 response = await stub.SayHello( 37 helloworld_pb2.HelloRequest(name="you"), metadata=metadata 38 ) 39 print("Greeter client received: " + response.message) 40 41 42if __name__ == "__main__": 43 logging.basicConfig() 44 asyncio.run(run()) 45