casbin
Version:
An authorization library that supports access control models like ACL, RBAC, ABAC in Node.JS
89 lines (88 loc) • 3.72 kB
JavaScript
;
// Copyright 2020 The Casbin 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.
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.newCachedEnforcer = exports.CachedEnforcer = void 0;
const enforcer_1 = require("./enforcer");
// CachedEnforcer wraps Enforcer and provides decision cache
class CachedEnforcer extends enforcer_1.Enforcer {
constructor() {
super(...arguments);
this.enableCache = true;
this.m = new Map();
}
// invalidateCache deletes all the existing cached decisions.
invalidateCache() {
this.m = new Map();
}
// setEnableCache determines whether to enable cache on e nforce(). When enableCache is enabled, cached result (true | false) will be returned for previous decisions.
setEnableCache(enableCache) {
this.enableCache = enableCache;
}
static canCache(...rvals) {
return rvals.every(n => typeof n === 'string');
}
static getCacheKey(...rvals) {
return rvals.join('$$');
}
getCache(key) {
return this.m.get(key);
}
setCache(key, value) {
this.m.set(key, value);
}
// enforce decides whether a "subject" can access a "object" with the operation "action", input parameters are usually: (sub, obj, act).
// if rvals is not string , ingore the cache
enforce(...rvals) {
const _super = Object.create(null, {
enforce: { get: () => super.enforce }
});
return __awaiter(this, void 0, void 0, function* () {
if (!this.enableCache) {
return _super.enforce.call(this, ...rvals);
}
let key = '';
const cache = CachedEnforcer.canCache(...rvals);
if (cache) {
key = CachedEnforcer.getCacheKey(...rvals);
const res = this.getCache(key);
if (res != undefined) {
return res;
}
}
const res = yield _super.enforce.call(this, ...rvals);
if (cache) {
this.setCache(key, res);
}
return res;
});
}
}
exports.CachedEnforcer = CachedEnforcer;
// newCachedEnforcer creates a cached enforcer via file or DB.
function newCachedEnforcer(...params) {
return __awaiter(this, void 0, void 0, function* () {
return enforcer_1.newEnforcerWithClass(CachedEnforcer, ...params);
});
}
exports.newCachedEnforcer = newCachedEnforcer;