go web 權限管理 簡單例子 (面向對象權限 ABAC / Casbin)

go web 權限管理 簡單例子 (面向對象權限 ABAC / Casbin)

說明

ABAC
調用 github.com/casbin/casbin

abac_model.conf

[request_definition]
r = sub, obj, act

[policy_definition]
p = sub, obj,act

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

[matchers]
m = r.sub.App == r.obj.App &&  r.sub.Type == r.obj.Type &&  r.sub.Method == r.obj.Method

main.go

package main

import (
    "fmt"
    "github.com/casbin/casbin"
)

type User struct {
    Id       int
    UserName string
    Group    []Group
}

type Group struct {
    Id       int
    Name     string
    App      string // app
    Type     string // 類型
    Method   string // 方法
    Priority int    // 優先級
}

type Obj struct {
    App    string // app
    Type   string // 類型
    Method string // 方法
}

func main() {
    e := casbin.NewEnforcer("E:\\go-test\\test\\abac\\abac_model.conf")

    group1 := Group{
        Name:     "group1",
        App:      "asset",
        Type:     "aliyun",
        Method:   "Get",
        Priority: 100,
    }

    group2 := Group{
        Name:     "group2",
        App:      "asset",
        Type:     "aliyun",
        Method:   "Get",
        Priority: 100,
    }

    //  用戶 hequan  屬于 group1 , group2
    user1 := User{
        UserName: "hequan",
        Group:    []Group{group1, group2},
    }

    obj := Obj{
        App:    "asset",
        Type:   "aliyun",
        Method: "Get",
    }

    var perms = false

    // 檢查 用戶 hequan 所有的組  是否有權限
    for _, v := range user1.Group {
        if e.Enforce(v, obj, ""){
            perms = true
            break
        }
    }
    if perms {
        fmt.Println("權限正常")
    } else {
        fmt.Println("沒有權限")
    }
}

結果

權限正常