5/26/2023 0 Comments Vm sandbox![]() ![]() This can lead to concurrency problems, and is vulnerable to attacks. Global scopes are shared amongst all function invocations.When you start a Node instance, the global scope provides access to system resources that you might want to limit, such as the process object.The global scope provides things such as global variables, an event loop and a module loader. In the web browser, window is a reference to the global scope. That means that two function invocations can potentially access the same global objects, which we want to prevent. Whenever you invoke a Lambda function, you get access to the global scope, and you don’t know which Node instance you are in. ![]() Lambda does not isolate the global scope. I want to make a clear distinction between this solution and Amazon Lambda. All customer functions run in single Node instance.Limit available internal and external Node modules.Code must run in an isolated Javascript scope.Minimal overhead and use of external libraries.The solution is easy to deploy, debug and maintain.Access to host machine resources are limited.However, in this article we will give our customer full access to a Node-like environment, with very little boilerplate code. There are other are ways to accomplish this, for instance by using similar methods to Jailed. They might perform a simple calculation or access external resources with HTTP calls. Your customers will be able to write a Javascript function, or a module, that is executed securely in the sandbox. In this article we’ll build a Node sandbox that supports function invocation. From simply allowing customers to test Javascript on your site to allowing customers to write custom code in middle layers in your application. Securely sandboxing Node.js is a common requirement and has a wide range of applications. ![]()
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