1# Copyright 2017 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 implementation of the gRPC helloworld.Greeter client.""" 15 16from __future__ import print_function 17 18import logging 19 20import default_value_client_interceptor 21import grpc 22import helloworld_pb2 23import helloworld_pb2_grpc 24 25 26def run(): 27 default_value = helloworld_pb2.HelloReply( 28 message="Hello from your local interceptor!" 29 ) 30 default_value_interceptor = ( 31 default_value_client_interceptor.DefaultValueClientInterceptor( 32 default_value 33 ) 34 ) 35 # NOTE(gRPC Python Team): .close() is possible on a channel and should be 36 # used in circumstances in which the with statement does not fit the needs 37 # of the code. 38 with grpc.insecure_channel("localhost:50051") as channel: 39 intercept_channel = grpc.intercept_channel( 40 channel, default_value_interceptor 41 ) 42 stub = helloworld_pb2_grpc.GreeterStub(intercept_channel) 43 response = stub.SayHello(helloworld_pb2.HelloRequest(name="you")) 44 print("Greeter client received: " + response.message) 45 46 47if __name__ == "__main__": 48 logging.basicConfig() 49 run() 50