@caspertech/duktype

Duktype

Duktape for Typescript/Node.JS

About

Duktype (Duktape + Typescript) aims to be a complete node.js binding for the Duktape Javascript engine, complete with Typescript typings.

This allows you to run user scripts in a completely isolated environment.

This is a native C++ module, with no dependencies - it should compile on any platform.

Security

Duktape and V8 don't share memory, so as long as Duktape itself remains secure (exploits have existed in the past), it should not be possible for user scripts to escape their sandbox.

Note: The vulnerability flagged on the badge above is internal to node-cmake, the build system, and doesn't affect this package.

Install

npm install --save @caspertech/duktype

Usage

import * as duktype from '@caspertech/duktype';

// Create a context which everything runs in
const ctx = new duktype.Context();

// Get the global object
const glob = ctx.getGlobalObject();

// Add a method to the global object
glob.setProperty('print', (any: any, number: any, of: any, args: any) =>
{
    console.log(any);
});

// Run some code which calls the method
ctx.eval(`print("I'm calling from Duktape!");`);

// Now maybe you want a console.log - let's add a console object
const obj = glob.createObject('console');

// Let's set another string property which is the tag to use for logging
obj.setProperty('tag', 'QUACK');

// Add a log method to console. You can pass parameters of almost any type, let's try a Date..
obj.setProperty('log', (date: Date, message: string) =>
{
    const tag = obj.getProperty('tag');
    console.log(date.toISOString() + ': [' + tag + '] ' + message);
});

// Let's run this thing
ctx.eval(`
print('Tag is: ' + console.tag);
console.log(new Date(), 'Console.log works!');
`);

License

MIT