@aikidosec/firewall/agent/hooks/wrapNewInstance.js

Zen by Aikido is an embedded Application Firewall that autonomously protects Node.js apps against common and critical attacks, provides rate limiting, detects malicious traffic (including bots), and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.wrapNewInstance = wrapNewInstance;
const AgentSingleton_1 = require("../AgentSingleton");
const wrapDefaultOrNamed_1 = require("./wrapDefaultOrNamed");
/**
 * Intercepts the creation of a new instance of a class, to wrap it's methods and properties.
 */
function wrapNewInstance(subject, className, pkgInfo, interceptor) {
    const agent = (0, AgentSingleton_1.getInstance)();
    if (!agent) {
        throw new Error("Can not wrap new instance if agent is not initialized");
    }
    try {
        return (0, wrapDefaultOrNamed_1.wrapDefaultOrNamed)(subject, className, function wrap(original) {
            return function wrap() {
                // eslint-disable-next-line prefer-rest-params
                const args = Array.from(arguments);
                // @ts-expect-error It's a constructor
                const newInstance = new original(...args);
                try {
                    const returnVal = interceptor(newInstance);
                    if (returnVal) {
                        return returnVal;
                    }
                }
                catch (error) {
                    if (error instanceof Error) {
                        agent.onFailedToWrapMethod(pkgInfo.name, className || "default export", error);
                    }
                }
                return newInstance;
            };
        });
    }
    catch (error) {
        if (error instanceof Error) {
            agent.onFailedToWrapMethod(pkgInfo.name, className || "default export", error);
        }
    }
}