# gRPC连接
# 1、安装依赖
pip install grpcio grpcio-tools
# 2、创建协议 helloworld.proto
syntax = "proto3";
option java_multiple_files = true;
option java_package = "io.grpc.examples.helloworld";
option java_outer_classname = "HelloWorldProto";
option objc_class_prefix = "HLW";
package helloworld;
// The greeting service definition.
service Greeter {
// Sends a greeting
rpc SayHello (HelloRequest) returns (HelloReply) {}
rpc SayHelloTest (HelloRequest) returns (HelloReply) {}
rpc SayHelloStreamReply (HelloRequest) returns (stream 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;
}
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# 3、生成 gRPC 代码
python -m grpc_tools.protoc -I. --python_out=. --pyi_out=. --grpc_python_out=. ./helloworld.proto
该命令会生成三个文件 helloworld_pb2_grpc.py，helloworld_pb2.py，helloworld_pb2.pyi
# 4、编写 server.py
from concurrent import futures
import logging
import grpc
import helloworld_pb2
import helloworld_pb2_grpc
class Greeter(helloworld_pb2_grpc.GreeterServicer):
def SayHello(self, request, context):
print(request.name)
return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
def serve():
port = '50051'
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
server.add_insecure_port('[::]:' + port)
server.start()
print("Server started, listening on " + port)
server.wait_for_termination()
if __name__ == '__main__':
logging.basicConfig()
serve()
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# 5、编写 client.py
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.
print("Will try to greet world ...")
with grpc.insecure_channel('localhost:50051') as channel:
stub = helloworld_pb2_grpc.GreeterStub(channel)
response = stub.SayHello(helloworld_pb2.HelloRequest(name='testtt'))
print("Greeter client received: " + response.message)
if __name__ == '__main__':
logging.basicConfig()
run()
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