代理模式

---

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为其他对象提供一种代理以控制对这个对象的访问。

image.png

package main

import (
    "fmt"
)

// 对象
type Subject interface {
    request(name string)
}

type RealSubject struct {
}

func (this *RealSubject) request(name string) {
    fmt.Println("RealSubject:", name)
}

// 对象的代理
type Proxy struct {
    realSubject *RealSubject
}

func (this *Proxy) request(name string) {
    realSubject := &RealSubject{}
    realSubject.request(name)
    fmt.Println("Proxy:", name)
}

func main() {
    var sub Subject
    sub = &Proxy{}
    sub.request("localhost")
}