1# Copyright 2021 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 hellostreamingworld.MultiGreeter client.""" 15 16import asyncio 17import logging 18 19import grpc 20import hellostreamingworld_pb2 21import hellostreamingworld_pb2_grpc 22 23 24async def run() -> None: 25 async with grpc.aio.insecure_channel("localhost:50051") as channel: 26 stub = hellostreamingworld_pb2_grpc.MultiGreeterStub(channel) 27 28 # Read from an async generator 29 async for response in stub.sayHello( 30 hellostreamingworld_pb2.HelloRequest(name="you") 31 ): 32 print( 33 "Greeter client received from async generator: " 34 + response.message 35 ) 36 37 # Direct read from the stub 38 hello_stream = stub.sayHello( 39 hellostreamingworld_pb2.HelloRequest(name="you") 40 ) 41 while True: 42 response = await hello_stream.read() 43 if response == grpc.aio.EOF: 44 break 45 print( 46 "Greeter client received from direct read: " + response.message 47 ) 48 49 50if __name__ == "__main__": 51 logging.basicConfig() 52 asyncio.run(run()) 53