python golang中grpc 使用示例代码详解
python
1、使用前准备,安装这三个库
pip install grpcio pip install protobuf pip install grpcio_tools
2、建立一个proto文件hello.proto
// [python quickstart](https://grpc.io/docs/quickstart/python.html#run-a-grpc-application) // python -m grpc_tools.protoc --python_out=. --grpc_python_out=. -I. hello.proto // helloworld.proto syntax = "proto3"; package test; service Greeter { rpc SayHello(HelloRequest) returns (HelloReply) {} rpc SayHelloAgain(HelloRequest) returns (HelloReply) {} } service Greetera{ rpc SayStudent(Studentid) returns (Student){} } message Student { string msg=1;//json } message Studentid{ string id=1; } message HelloRequest { string name = 1; } message HelloReply { string message = 1; }
3、执行命令就会对应生成两个py文件
hello_pb2.py
hello_pb2_grpc.py
python -m grpc_tools.protoc --python_out=. --grpc_python_out=. -I. hello.proto
4、py服务端代码hello.server.py:
from concurrent import futures import time import grpc import hello_pb2 import hello_pb2_grpc import json # 实现 proto 文件中定义的 GreeterServicer class Greeter(hello_pb2_grpc.GreeterServicer): # 实现 proto 文件中定义的 rpc 调用 def SayHello(self, request, context): return hello_pb2.HelloReply(message = 'hello {msg}'.format(msg = request.name)) def SayHelloAgain(self, request, context): return hello_pb2.HelloReply(message='hello {msg}'.format(msg = request.name)) class Gretera(hello_pb2_grpc.GreeteraServicer): def SayStudent(self,request,context): print(request.id) if request.id=="0": c=hello_pb2.Student(msg=json.dumps({"name":"owen","age":22,"sex":"男"})) else: c=hello_pb2.Student(msg=json.dumps({"name":"lihui","age":23,"sex":"女"})) return c def serve(): # 启动 rpc 服务 server = grpc.server(futures.ThreadPoolExecutor(max_workers=10)) hello_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server) hello_pb2_grpc.add_GreeteraServicer_to_server(Gretera(),server) server.add_insecure_port('[::]:50052') server.start() try: while True: time.sleep(60*60*24) # one day in seconds except KeyboardInterrupt: server.stop(0) if __name__ == '__main__': serve()
py客户端代码hello.client.py:
import grpc import hello_pb2 import hello_pb2_grpc import json def run(): # 连接 rpc 服务器 channel = grpc.insecure_channel('localhost:50051') # 调用 rpc 服务 stub = hello_pb2_grpc.GreeterStub(channel) response = stub.SayHello(hello_pb2.HelloRequest(name='czl')) print("Greeter client received: " + response.message) response = stub.SayHelloAgain(hello_pb2.HelloRequest(name='nsdnfkjda')) print("Greeter client received: " + response.message) stub1 = hello_pb2_grpc.GreeteraStub(channel) response1 = stub1.SayStudent(hello_pb2.Studentid(id='1')) print(json.loads(response1.msg)) if __name__ == '__main__': run()
golang
由于grpc是跨语言的所以这里用golang做为示范,golang客户端代码,小编这里也踩了许多坑,最主要的是两个proto文件一定要一致,golang 中使用必须安装protoc,windows将环境变量指向安装目录的bin下面:
1、protocal buffer安装
从 https://github.com/google/protobuf/releases 下载 对应自己的系统(环境变量记得改)
2、安装 golang protobuf
go get -u github.com/golang/protobuf/proto // golang protobuf 库 go get -u github.com/golang/protobuf/protoc-gen-go //protoc --go_out 工具
3、安装 gRPC-go
go get google.golang.org/grpc
4、生成go文件
protoc --go_out=plugins=grpc:文件目录 对应的.proto文件 protoc --go_out=plugins=grpc:. hello.proto
生成hello.pb.go,调用的实现hello_go_client.go:
package main import ( "context" "encoding/json" "google.golang.org/grpc" "log" "student/test" //对应的生成文件目录 ) type Studenmsg struct { Name string Age int Sex string } func main() { // 建立连接到gRPC服务 conn, err := grpc.Dial("127.0.0.1:50052", grpc.WithInsecure()) if err != nil { log.Fatalf("did not connect: %v", err) } // 函数结束时关闭连接 defer conn.Close() // 创建Waiter服务的客户端 t := test.NewGreeteraClient(conn) tr,err:=t.SayStudent(context.Background(),&test.Studentid{Id:"1"}) if err != nil { log.Fatalf("could not greet: %v", err) } var st Studenmsg err=json.Unmarshal([]byte(tr.Msg),&st)//这里说明一下发过来的数据是json格式转化成struct if err!=nil{ log.Println(err.Error()) } log.Println(st.Name,st.Age,st.Sex) }
总结
到此这篇关于python golang中grpc 使用示例代码详解的文章就介绍到这了,更多相关python golang grpc 使用内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们!
赞 (0)