greeter_server.go

// Status without details results to non-utf-8 string followed by percent-encoding.

func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
	grpcStatus := status.New(codes.InvalidArgument, string([]byte{0xff, 0xfe, 0xfd}))
	return nil, grpcStatus.Err()
}

// Adding detail to status results to panic.

func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
	grpcStatus := status.New(codes.InvalidArgument, string([]byte{0xff, 0xfe, 0xfd}))
	grpcStatus, err := grpcStatus.WithDetails(&pb.HelloRequest{})
	if err != nil {
		return nil, err
	}
	return nil, grpcStatus.Err()
}