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v2_demo.go
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v2_demo.go
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// Copyright 2017 The string-adapter Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
scas "github.com/qiangmzsx/string-adapter/v2"
"github.com/casbin/casbin/v2"
"github.com/casbin/casbin/v2/model"
)
func main() {
modelText := `
[request_definition]
r = sub, obj, act
[policy_definition]
p = sub, obj, act
[role_definition]
g = _, _
g2 = _, _
[policy_effect]
e = some(where (p.eft == allow))
[matchers]
m = g(r.sub, p.sub) && g2(r.obj, p.obj) && r.act == p.act`
m := model.NewModel()
m.LoadModelFromText(modelText)
line := `
p, alice, data1, read
p, bob, data2, write
p, data_group_admin, data_group, write
g, alice, data_group_admin
g2, data1, data_group
g2, data2, data_group
`
sa := scas.NewAdapter(line)
// Initialize a Gorm adapter and use it in a Casbin enforcer:
// The adapter will use the MySQL database named "casbin".
// If it doesn't exist, the adapter will create it automatically.
// You can also use an already existing gorm instance with gormadapter.NewAdapterByDB(gormInstance)
//a, _ := gormadapter.NewAdapter("mysql", "mysql_username:mysql_password@tcp(127.0.0.1:3306)/") // Your driver and data source.
// e, _ := casbin.NewEnforcer("examples/rbac_model.conf", a)
e, _ := casbin.NewEnforcer(m, sa)
// Or you can use an existing DB "abc" like this:
// The adapter will use the table named "casbin_rule".
// If it doesn't exist, the adapter will create it automatically.
// a := gormadapter.NewAdapter("mysql", "mysql_username:mysql_password@tcp(127.0.0.1:3306)/abc", true)
// Load the policy from DB.
e.LoadPolicy()
// Check the permission.
if res, _ := e.Enforce("alice", "data1", "read"); res {
fmt.Println("permitted")
} else {
fmt.Println("rejected")
}
// Modify the policy.
// e.AddPolicy(...)
// e.RemovePolicy(...)
// Save the policy back to DB.
e.SavePolicy()
}