wehub-resource-sync
102 lines
2.7 KiB
Go
102 lines
2.7 KiB
Go
// Copyright 2021 The Casdoor Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package util
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import (
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"encoding/json"
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"reflect"
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)
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func StructToJson(v interface{}) string {
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data, err := json.Marshal(v)
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if err != nil {
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panic(err)
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}
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return string(data)
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}
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func StructToJsonFormatted(v interface{}) string {
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data, err := json.MarshalIndent(v, "", " ")
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if err != nil {
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panic(err)
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}
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return string(data)
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}
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func JsonToStruct(data string, v interface{}) error {
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return json.Unmarshal([]byte(data), v)
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}
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func TryJsonToAnonymousStruct(j string) (interface{}, error) {
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var data map[string]interface{}
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if err := json.Unmarshal([]byte(j), &data); err != nil {
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return nil, err
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}
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// Create a slice of StructFields
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fields := make([]reflect.StructField, 0, len(data))
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for k, v := range data {
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fields = append(fields, reflect.StructField{
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Name: k,
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Type: reflect.TypeOf(v),
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})
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}
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// Create the struct type
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t := reflect.StructOf(fields)
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// Unmarshal again, this time to the new struct type
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val := reflect.New(t)
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i := val.Interface()
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if err := json.Unmarshal([]byte(j), &i); err != nil {
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return nil, err
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}
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return i, nil
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}
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// InterfaceToEnforceValue converts a single request value for use in Casbin ABAC enforcement.
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// - Strings that are valid JSON objects are converted to anonymous structs so Casbin can
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// access their fields (e.g. r.sub.DivisionGuid).
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// - Maps (map[string]interface{}) produced by direct JSON unmarshaling are re-marshaled and
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// then converted to anonymous structs in the same way.
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// - All other values are returned unchanged.
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func InterfaceToEnforceValue(v interface{}) interface{} {
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switch val := v.(type) {
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case string:
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jStruct, err := TryJsonToAnonymousStruct(val)
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if err == nil {
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return jStruct
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}
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return val
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case map[string]interface{}:
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// The value was already decoded as a JSON object; re-encode it so we
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// can reuse TryJsonToAnonymousStruct to produce a named-field struct
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// that Casbin can evaluate with dot-notation (r.sub.Field).
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jsonBytes, err := json.Marshal(val)
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if err != nil {
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return val
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}
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jStruct, err := TryJsonToAnonymousStruct(string(jsonBytes))
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if err == nil {
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return jStruct
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}
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return val
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default:
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return v
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}
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}
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