grpc-python 与 grpc-go 互传图片文件分布式

将go语言作为客户端，python作为服务器端
go语言部分：
go_client.proto:

// 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.syntax = "proto3"; option java_multiple_files = true; option java_package = "io.grpc.examples.helloworld"; option java_outer_classname = "HelloWorldProto"; package helloworld; // The greeting service definition. service Greeter { // Sends a greeting rpc SayHello (HelloRequest) returns (HelloReply) {} }// The request message containing the user's name. message HelloRequest { string name = 1; //下面添加定义photo的二进制字段名 bytes photo = 2; }// The response message containing the greetings message HelloReply { string message = 1; }

go_client/main.go:

/* * * 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. * */// Package main implements a client for Greeter service. package mainimport ( "context" "io/ioutil" "log" "os" "time" "google.golang.org/grpc" pb "google.golang.org/grpc/examples/helloworld/helloworld" )const ( address= "localhost:50051" defaultName = "world" )func main() { // Set up a connection to the server. conn, err := grpc.Dial(address, grpc.WithInsecure()) if err != nil { log.Fatalf("did not connect: %v", err) } defer conn.Close() c := pb.NewGreeterClient(conn) // Contact the server and print out its response. name := defaultName if len(os.Args) > 1 { name = os.Args[1] } ctx, cancel := context.WithTimeout(context.Background(), time.Second) defer cancel() //读取一张图片并发送到python服务端 photo, err := ioutil.ReadFile("C:\\Users\\zhilo\\Desktop\\桌面的东西\\prologue.png") r, err := c.SayHello(ctx, &pb.HelloRequest{Name: name, Photo:photo}) if err != nil { log.Fatalf("could not greet: %v", err) } log.Printf("Greeting: %s", r.Message) }

接着，在根目录执行：
$protoc -I helloworld/ helloworld/helloworld.proto --go_out=plugins=grpc:helloworld
生成helloworld.pb.go

python部分：
python_server.protoc:

// 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.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) {} }// The request message containing the user's name. message HelloRequest { string name = 1; //下面定义photo的二进制字段名 bytes photo = 2; }// The response message containing the greetings message HelloReply { string message = 1; }

python_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 loggingimport grpc from PIL import Image import ioimport helloworld_pb2 import helloworld_pb2_grpc_ONE_DAY_IN_SECONDS = 60 * 60 * 24class Greeter(helloworld_pb2_grpc.GreeterServicer):def SayHello(self, request, context): #接受到go传过来的图片之后的处理部分： data_stream = request.photo data = https://www.it610.com/article/io.BytesIO(data_stream) img = Image.open(data) img.save("test.png") return helloworld_pb2.HelloReply(message='Hello, %s! from python' % request.name)def SayHelloAgain(self, request, context): return helloworld_pb2.HelloReply(message="Hello, %s! Again!!!" % 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()

然后在根目录运行下面命令：
$python -m grpc_tools.protoc -I../../protos --python_out=. --grpc_python_out=. ../../protos/helloworld.proto

【grpc-python 与 grpc-go 互传图片文件】这样，先运行python_server.py，然后再运行go_client/main.go，就可以将go端的照片传送到python端并保存啦！