1、gRPC 的安裝：
$ pip install grpcio
2、安裝 ProtoBuf 相關的 python 依賴庫：
$ pip install protobuf
3、安裝 python grpc 的 protobuf 編譯工具：
$ pip install grpcio-tools
4、創建定義的文件 helloworld.proto 內容如下：
syntax = "proto3";
// The greeting service definition.
service Greeter {
// Sends a greeting
rpc say_hello (HelloRequest) returns (HelloReply) {}
}
// The request message containing the user's name.
message HelloRequest {
string name = 1;
}
// The response message containing the greetings
message HelloReply {
string message = 1;
}
5、編譯服務器和客戶端文件
python -m grpc_tools.protoc -I ./ --python_out=. --grpc_python_out=. ./helloworld.proto
當前目錄下生成
helloworld_pb2_grpc.py
helloworld_pb2.py
6、創建服務端文件 greeter_server.py
# Copyright 2015 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 implementation of the GRPC helloworld.Greeter server."""
from concurrent import futures
import time
import logging
import grpc
import helloworld_pb2
import helloworld_pb2_grpc
_ONE_DAY_IN_SECONDS = 60 * 60 * 24
class Greeter(helloworld_pb2_grpc.GreeterServicer):
def say_hello(self, request, context):
return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
def serve():
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
server.add_insecure_port('[::]:50051')
server.start()
try:
while True:
time.sleep(_ONE_DAY_IN_SECONDS)
except KeyboardInterrupt:
server.stop(0)
if __name__ == '__main__':
logging.basicConfig()
serve()
7、創建客戶端文件 greeter_client.py
# Copyright 2015 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 implementation of the GRPC helloworld.Greeter client."""
from __future__ import print_function
import logging
import grpc
import helloworld_pb2
import helloworld_pb2_grpc
def run():
# NOTE(gRPC Python Team): .close() is possible on a channel and should be
# used in circumstances in which the with statement does not fit the needs
# of the code.
with grpc.insecure_channel('localhost:50051') as channel:
stub = helloworld_pb2_grpc.GreeterStub(channel)
response = stub.say_hello(helloworld_pb2.HelloRequest(name='pwp'))
print("Greeter client received: " + response.message)
if __name__ == '__main__':
logging.basicConfig()
run()
8、運行服務端
python greeter_server.py
9、運行客戶端調用
python greeter_client.py
打印：
Greeter client received: Hello, pwp!