94 lines
2.9 KiB
TypeScript
94 lines
2.9 KiB
TypeScript
///
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/// Copyright © 2016-2025 The Thingsboard Authors
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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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///
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import vm, { Script } from 'vm';
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export type TbScript = Script | Function;
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export class JsExecutor {
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useSandbox: boolean;
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constructor(useSandbox: boolean) {
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this.useSandbox = useSandbox;
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}
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compileScript(code: string): Promise<TbScript> {
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if (this.useSandbox) {
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return this.createScript(code);
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} else {
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return this.createFunction(code);
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}
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}
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executeScript(script: TbScript, args: string[], timeout?: number): Promise<any> {
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if (this.useSandbox) {
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return this.invokeScript(script as Script, args, timeout);
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} else {
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return this.invokeFunction(script as Function, args);
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}
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}
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private createScript(code: string): Promise<Script> {
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return new Promise((resolve, reject) => {
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try {
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code = "("+code+")(...args)";
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const script = new vm.Script(code);
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resolve(script);
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} catch (err) {
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reject(err);
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}
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});
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}
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private invokeScript(script: Script, args: string[], timeout: number | undefined): Promise<any> {
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return new Promise((resolve, reject) => {
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try {
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const sandbox = Object.create(null);
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sandbox.args = args;
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const result = script.runInNewContext(sandbox, {timeout: timeout});
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resolve(result);
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} catch (err) {
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reject(err);
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}
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});
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}
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private createFunction(code: string): Promise<Function> {
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return new Promise((resolve, reject) => {
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try {
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code = "return ("+code+")(...args)";
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const parsingContext = vm.createContext({});
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const func = vm.compileFunction(code, ['args'], {parsingContext: parsingContext});
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resolve(func);
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} catch (err) {
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reject(err);
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}
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});
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}
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private invokeFunction(func: Function, args: string[]): Promise<any> {
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return new Promise((resolve, reject) => {
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try {
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const result = func(args);
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resolve(result);
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} catch (err) {
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reject(err);
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}
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});
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}
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}
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