JSON_EchoClient.go

/*
JSON_EchoClient

go run JSON_EchoClient.go localhost:1200
*/
package main

import (
	"encoding/json"
	"fmt"
	"net"
	"os"
)

type Person struct {
	Name  Name
	Email []Email
}
type Name struct {
	Family   string
	Personal string
}
type Email struct {
	Kind    string
	Address string
}

// Person的toString方法
func (p Person) String() string {
	s := p.Name.Personal + " " + p.Name.Family
	for _, v := range p.Email {
		s += "\n" + v.Kind + ": " + v.Address
	}
	return s
}

func main() {
	person := Person{
		Name: Name{Family: "Chu", Personal: "Tian Le"},
		Email: []Email{
			Email{Kind: "Work", Address: "sales@gmail.com"},
			Email{Kind: "Life", Address: "life@gmail.com"},
		},
	}

	if len(os.Args) != 2 {
		fmt.Println("Usage: ", os.Args[0], " host:port")
		os.Exit(1)
	}

	service := os.Args[1]

	conn, err := net.Dial("tcp", service)
	checkError(err)

	encoder := json.NewEncoder(conn)
	decoder := json.NewDecoder(conn)

	for n := 0; n < 10; n++ {
		encoder.Encode(person)

		var newPerson Person
		decoder.Decode(&newPerson)
		fmt.Println(newPerson.String())
	}

	os.Exit(0)
}

func checkError(err error) {
	if err != nil {
		fmt.Println("Fatal error ", err.Error())
		os.Exit(1)
	}
}