// server.go
package main

import (
	"net"
	"net/rpc"
)

type HelloService struct{}

func (s *HelloService) Hello(request string, response *string) error {
	// 返回值是通过修改 response 的值
	*response = "Hello" + request
	return nil
}

func main() {
	// 1. 实例化一个 server
	listener, _ := net.Listen("tcp", ":1234")
	// 2. 注册处理逻辑 handler
	_ = rpc.RegisterName("HelloService", &HelloService{})
	// 3. 启动服务
	conn, _ := listener.Accept() // 当一个新的链接进来时,rpc 会接管逻辑
	rpc.ServeConn(conn)
}

// client.go
package main

import (
	"fmt"
	"net/rpc"
)

func main() {
	// 1. 建立连接
	client, err := rpc.Dial("tcp", "localhost:1234")
	if err != nil {
		panic("连接失败")
	}
	var response string
	err = client.Call("HelloService.Hello", "Aimyon", &response)
	if err != nil {
		panic("调用失败")
	}
	fmt.Println(response)
}