Hello World
最后更新于：2022-04-02 03:07:21
[TOC]
## 概述
```
package main
import (
"fmt"
"github.com/casbin/casbin/v2"
"github.com/casbin/casbin/v2/model"
fileadapter "github.com/casbin/casbin/v2/persist/file-adapter"
_ "github.com/go-sql-driver/mysql"
"log"
)
func main() {
a,_:=model.NewModelFromString(`
[request_definition]
r = sub, obj, act
[policy_definition]
p = sub, obj, act
[role_definition]
g = _, _
[policy_effect]
e = some(where (p.eft == allow))
[matchers]
m = g(r.sub, p.sub) && r.obj == p.obj && r.act == p.act
`)
b:=fileadapter.NewAdapter("D:\\workspace\\antbiz\\test\\basic_policy.csv")
e, err := casbin.NewEnforcer(a,b)
if err != nil {
log.Fatalf("error: enforcer: %s", err)
}
sub := "alice" // 想要访问资源的用户。
obj := "data1" // 将被访问的资源。
act := "read" // 用户对资源执行的操作。
ok, err := e.Enforce(sub, obj, act)
if err != nil {
// 处理err
}
if ok == true {
fmt.Printf("%+v\n", ok)
} else {
// 拒绝请求，抛出异常
fmt.Printf("%+v\n", "not allow")
}
roles,err := e.GetRolesForUser("alice")
if err != nil {
fmt.Printf("%+v\n", err)
}
fmt.Printf("%+v\n", roles)
// 您可以使用BatchEnforce()来批量执行一些请求
// 这个方法返回布尔切片，此切片的索引对应于二维数组的行索引。
// 例如 results[0] 是 {"alice", "data1", "read"} 的结果
//results, err := e.BatchEnforce([][]interface{}{{"alice", "data1", "read"}, {"bob", "data2", "write"}, {"jack", "data3", "read"}})
}
```
';