gRPC repeated数组的使用 python

reco.proto

syntax = "proto3";

package rpc_package;


service HelloWorldService {
    rpc SayHello (HelloRequest) returns (HelloReply) {}
}

message HelloRequest {
    repeated Student student=1;
}

message Student{
    int32 age=1;
    string name=2;
}

message HelloReply {
    string message = 1;
    repeated int32 s_list=2;
}

　　

 python -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. reco.proto

创建出 reco_pb2.py 和 reco_pb2_grpc.py 两个文件

然后写服务端代码

test_grpc_server.py

from concurrent import futures
import grpc
import logging
import time

from reco_pb2_grpc import add_HelloWorldServiceServicer_to_server, 
    HelloWorldServiceServicer
from reco_pb2 import HelloRequest, HelloReply


class Hello(HelloWorldServiceServicer):

    # 这里实现我们定义的接口
    def SayHello(self, request, context):
        s_list = [0,1,2,4,3]
        return HelloReply(message='Hello, {}! '.format(request.student),s_list=s_list)


def serve():
    # 这里通过thread pool来并发处理server的任务
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))

    # 将对应的任务处理函数添加到rpc server中
    add_HelloWorldServiceServicer_to_server(Hello(), server)

    # 这里使用的非安全接口，世界gRPC支持TLS/SSL安全连接，以及各种鉴权机制
    server.add_insecure_port('[::]:50000')
    server.start()
    try:
        while True:
            time.sleep(60 * 60 * 24)
    except KeyboardInterrupt:
        server.stop(0)


if __name__ == "__main__":
    logging.basicConfig()
    serve()

　　

test_grpc_client.py

from __future__ import print_function
import logging

import grpc
from reco_pb2 import HelloRequest, HelloReply
from reco_pb2_grpc import HelloWorldServiceStub

def run():
    # 使用with语法保证channel自动close
    with grpc.insecure_channel('localhost:50000') as channel:
        # 客户端通过stub来实现rpc通信
        stub = HelloWorldServiceStub(channel)

        # 客户端必须使用定义好的类型，这里是HelloRequest类型
        hellorequest = HelloRequest()
        for i in range(5):
            request = hellorequest.student.add()
            request.age = 18
            request.name = "xinyuuliu"

        response = stub.SayHello(hellorequest)
    print ("hello client received: " + response.message)
    print(response.s_list)

if __name__ == "__main__":
    logging.basicConfig()
    run()

　　

结果：

hello client received: Hello, [age: 18
name: "xinyuuliu"
, age: 18
name: "xinyuuliu"
, age: 18
name: "xinyuuliu"
, age: 18
name: "xinyuuliu"
, age: 18
name: "xinyuuliu"
]! 
[0, 1, 2, 4, 3]