我最近开始使用 Go 学习微服务，并且偶然发现了一些使用 micro、gRPC 和 protobuf 的教程。一段时间后，我意识到我没有收到来自为与微服务通信而创建的 cli 的任何错误消息。下面的代码能够重现这一点。
import (
"context"
"errors"
"github.com/asim/go-micro/v3/client"
"github.com/asim/go-micro/v3/cmd"
"github.com/asim/go-micro/v3/logger"
pb "github.com/dbielecki97/grpc-errors/proto/greeter"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"log"
"os"
)
func main() {
err := cmd.Init(cmd.Name("cli.greeter"))
if err != nil {
return
}
log.Println(os.Args)
if len(os.Args) < 2 {
log.Fatal(errors.New("Not enough arguments, expecing name."))
}
name := os.Args[1]
c := pb.NewGreeterService("service.greeter", client.DefaultClient)
greet, err := c.Greet(context.Background(), &pb.Request{Name: name})
if err != nil {
s, ok := status.FromError(err)
if ok {
if s.Code() == codes.InvalidArgument {
logger.Fatal("Incorrect name!")
}
} else {
logger.Fatal(s.Message())
}
}
logger.Info(greet.Message)
os.Exit(0)
}
import (
"context"
"github.com/asim/go-micro/v3"
"github.com/asim/go-micro/v3/logger"
pb "github.com/dbielecki97/grpc-errors/proto/greeter"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
type greeterservice struct{}
func (g greeterservice) Greet(ctx context.Context, req *pb.Request, res *pb.Greeting) error {
logger.Info("Name :: ", req.Name)
if req.Name == "Dawid" {
logger.Info("Correct name")
res.Message = "Hello Dawid"
return nil
}
logger.Warn("Incorrect name")
return status.Error(codes.InvalidArgument, "Bad name")
}
func main() {
service := micro.NewService(micro.Name("service.greeter"),
micro.Version("latest"))
service.Init()
err := pb.RegisterGreeterServiceHandler(service.Server(), &greeterservice{})
if err != nil {
return
}
err = service.Run()
if err != nil {
return
}
}
syntax = "proto3";
package greeter;
service GreeterService {
rpc Greet(Request) returns (Greeting) {}
}
message Request {
string name = 1;
}
message Greeting{
string message = 1;
}
当客户端使用参数Dawid运行时，一切都按预期工作，但是如果我尝试其他任何操作，我确实希望客户端出现错误并显示消息Bad name，但我收到的只是默认 5 秒等待时间后的超时。
2021-05-31 16:26:36 file=client/client.go:40 level=fatal {"id":"go.micro.client","code":408,"detail":"call timeout: context deadline exceeded","status":"Request Timeout"}