package main import ( "google.golang.org/grpc" "log" "fmt" ."github.com/advanced-go-programming-book-code/ch4/s04/e01grpc/helloservice" "context" ) func main() { conn, err := grpc.Dial("localhost:1234", grpc.WithInsecure()) if err != nil { log.Fatal(err) } defer conn.Close() client := NewHelloServiceClient(conn) reply, err := client.Hello(context.Background(), &String{Value: "hello"}) if err != nil { log.Fatal(err) } fmt.Println(reply.GetValue()) }