JSON Adapter is the JSON (JavaScript Object Notation) adapter for Casbin. With this library, Casbin can load policy from JSON string or save policy to it.
go get github.com/casbin/json-adapter/v2
package main
import (
"github.com/casbin/casbin/v2"
"github.com/casbin/json-adapter/v2"
)
func main() {
// Initialize a JSON adapter and use it in a Casbin enforcer:
b := []byte{} // b stores Casbin policy in JSON bytes.
a := jsonadapter.NewAdapter(&b) // Use b as the data source.
e, _ := casbin.NewEnforcer("examples/rbac_model.conf", a)
// Load the policy from JSON bytes b.
e.LoadPolicy()
// Check the permission.
e.Enforce("alice", "data1", "read")
// Modify the policy.
// e.AddPolicy(...)
// e.RemovePolicy(...)
// Save the policy back to JSON bytes b.
e.SavePolicy()
}The following illustrates the expected JSON format for a policy. The rbac_policy.json has the same policy found in rbac_policy.csv.
[
{"PType":"p","V0":"alice","V1":"data1","V2":"read"},
{"PType":"p","V0":"bob","V1":"data2","V2":"write"},
{"PType":"p","V0":"data2_admin","V1":"data2","V2":"read"},
{"PType":"p","V0":"data2_admin","V1":"data2","V2":"write"},
{"PType":"g","V0":"alice","V1":"data2_admin"}
]This project is under Apache 2.0 License. See the LICENSE file for the full license text.