Qt6.5 grpc组件使用 + golang grpc server示例详解

1. 资料

1) Protobuf 开发文档

https://protobuf.dev/

2) protobuf安装指南

https://grpc.io/docs/protoc-installation/

3) protoc 下载

https://github.com/protocolbuffers/protobuf/releases/tag/v23.1

2. Qt grpc 组件 & 工具

1) Qt6.5 安装目录下 xx\Qt\6.5.0\mingw_64\bin

i. qtgrpcgen.exe 将proto转成Qt 库 的 grpc客户端
ii. qtprotobufgen.exe 将proto转成带Qt封装的 的 protobuf接口

2) 指令使用

helloworld.proto 文件

syntax = "proto3";
package helloworld;
message HelloRequest {
 string name = 1;
}
message HelloResponse {
 string message = 1;
}
service HelloService {
 rpc SayHello (HelloRequest) returns (HelloResponse) {}
}
option go_package = "proto/helloworld";

1) 生成Qt封装的protobuf接口

protoc.exe --plugin=protoc-gen-qtprotobuf=E:\qt599\Qt\6.5.0\mingw_64\bin\qtprotobufgen.exe -I “D:/workspace/Qt/grpc_test/common” --qtprotobuf_out=“D:/workspace/Qt/grpc_test/common” “D:/workspace/Qt/grpc_test/common/helloworld.proto”

2) 生成Qt grpc客户端

protoc --plugin=protoc-gen-qtgrpc=E:/qt599/Qt/6.5.0/mingw_64/bin/qtgrpcgen.exe --qtgrpc_out=“D:/workspace/Qt/grpc_test/common” -I “D:/workspace/Qt/grpc_test/common” “D:/workspace/Qt/grpc_test/common/helloworld.proto”

3) 客户端调用代码

#include <QCoreApplication>
#include <QGrpcInsecureChannelCredentials>
#include "helloworld_client.grpc.qpb.h"
#include <QGrpcHttp2Channel>
int main(int argc, char *argv[])
{
   QCoreApplication a(argc, argv);
   helloworld::HelloService::Client client;
   auto channel = std::shared_ptr<QAbstractGrpcChannel>(new QGrpcHttp2Channel(
       QUrl("http://localhost:50051",
            QUrl::StrictMode),
       QGrpcInsecureChannelCredentials()
           | QGrpcInsecureCallCredentials()));
   client.attachChannel(channel);
   helloworld::HelloRequest req;
   helloworld::HelloResponse rep;
   req.setName("gray");
   QGrpcStatus status = client.SayHello(req, &rep);
   qDebug() << "Request Result: " << status.code() << status.message();
   qDebug() << "REP : " << rep.message();
   return a.exec();
}

3. Golang服务端

1) 生成golang 带grpc接口文件

protoc.exe -I D:/workspace/Qt/grpc_test/common --proto_path=&ldquo;D:/workspace/grpc/protoc/include/google/protobuf&rdquo; --plugin=protoc-gen-go=D:/workspace/grpc/protoc/bin/protoc-gen-go.exe --go_out=plugins=grpc:D:/workspace/Qt/grpc_test/common D:/workspace/Qt/grpc_test/common/helloworld.proto

2) 示例代码

再创建一个main.go，调用函数RunServer即可

package proto
import (
context "context"
"flag"
"fmt"
"log"
"net"
grpc "google.golang.org/grpc"
)
var (
port = flag.Int("port", 50051, "The server port")
)
type Server struct {
HelloServiceServer
}
// SayHello implements helloworld.GreeterServer
func (s *Server) SayHello(ctx context.Context, in *HelloRequest) (*HelloResponse, error) {
fmt.Printf("Received: ％v\n", in.GetName())
return &HelloResponse{Message: "Hello " + in.GetName()}, nil
}
func RunServer() error {
flag.Parse()
lis, err := net.Listen("tcp", fmt.Sprintf(":％d", *port))
if err != nil {
log.Fatalf("failed to listen: ％v", err)
}
s := grpc.NewServer()
RegisterHelloServiceServer(s, &Server{})
log.Printf("server listening at ％v", lis.Addr())
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: ％v", err)
}
return err
}

4. 介绍一下Qt6.5支持哪些grpc功能

由Qt6.5 帮助文档可知道, 现在Qt6.5只封装支持了客户端，服务端暂未支持;

来源：https://blog.csdn.net/halo_hsuh/article/details/130815730