Casbin之Model模型存储(动态初始化)、Model模型存储(字符串加载)

Casbin之Model模型存储(动态初始化)、Model模型存储(字符串加载)

一、Model模型存储(动态初始化)

1.讲解

2.modle.conf文件

无这个文件

我们将在代码中定义

3.Policy.csv文件

p, dajun, data1, read
p, lizi, data2, write
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2

4.main

package main

import (
	"fmt"
	"github.com/casbin/casbin/v2"
	"github.com/casbin/casbin/v2/model"
	fileadapter "github.com/casbin/casbin/v2/persist/file-adapter"
	"log"
)

func check(e *casbin.Enforcer, sub, obj, act string) {
	ok, _ := e.Enforce(sub, obj, act)
	if ok {
		fmt.Printf("%s CAN %s %s\n", sub, act, obj)
	} else {
		fmt.Printf("%s CANNOT %s %s\n", sub, act, obj)
	}
}
func main() {
	m := model.NewModel()
	m.AddDef("r", "r", "sub, obj, act")
	m.AddDef("p", "p", "sub, obj, act")
	m.AddDef("e", "e", "some(where (p.eft == allow))")
	m.AddDef("m", "m", "r.sub == p.sub && r.obj == p.obj && r.act == p.act")

	a := fileadapter.NewAdapter("./casbin/Policy.csv")
	e, err := casbin.NewEnforcer(m, a)
	if err != nil {
		log.Fatalf("NewEnforecer failed:%v\n", err)
	}

	check(e, "dajun", "data1", "read")
	check(e, "lizi", "data2", "write")
	check(e, "dajun", "data1", "write")
	check(e, "dajun", "data2", "read")
}
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5.输出及结构

二、Model模型存储(字符串加载）

1.讲解

2.model.conf文件

无Policy.csv文件

3.Policy.csv文件

p, dajun, data1, read
p, lizi, data2, write
1
2

4.main

package main

import (
	"fmt"
	"github.com/casbin/casbin/v2"
	"github.com/casbin/casbin/v2/model"
	fileadapter "github.com/casbin/casbin/v2/persist/file-adapter"
)

func check(e *casbin.Enforcer, sub, obj, act string) {
	ok, _ := e.Enforce(sub, obj, act)
	if ok {
		fmt.Printf("%s CAN %s %s\n", sub, act, obj)
	} else {
		fmt.Printf("%s CANNOT %s %s\n", sub, act, obj)
	}
}
func main() {
	text := `
  [request_definition]
  r = sub, obj, act

  [policy_definition]
  p = sub, obj, act

  [policy_effect]
  e = some(where (p.eft == allow))

  [matchers]
  m = r.sub == p.sub && r.obj == p.obj && r.act == p.act
  `

	m, _ := model.NewModelFromString(text)
	a := fileadapter.NewAdapter("./casbin/Policy.csv")
	e, _ := casbin.NewEnforcer(m, a)

	check(e, "dajun", "data1", "read")
	check(e, "lizi", "data2", "write")
	check(e, "dajun", "data1", "write")
	check(e, "dajun", "data2", "read")
}
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5.输出及结构