var path = require('path'), Module = require('module'), i18n = require('../i18n'), _ = require('lodash'); function AppSandbox(opts) { this.opts = _.defaults(opts || {}, AppSandbox.defaults); } AppSandbox.prototype.loadApp = function loadAppSandboxed(appPath) { var appFile = require.resolve(appPath), appBase = path.dirname(appFile); this.opts.appRoot = appBase; return this.loadModule(appPath); }; AppSandbox.prototype.loadModule = function loadModuleSandboxed(modulePath) { // Set loaded modules parent to this var self = this, moduleDir = path.dirname(modulePath), parentModulePath = self.opts.parent || module.parent, appRoot = self.opts.appRoot || moduleDir, currentModule, nodeRequire; // Resolve the modules path modulePath = Module._resolveFilename(modulePath, parentModulePath); // Instantiate a Node Module class currentModule = new Module(modulePath, parentModulePath); // Grab the original modules require function nodeRequire = currentModule.require; // Set a new proxy require function currentModule.require = function requireProxy(module) { // check whitelist, plugin config, etc. if (_.contains(self.opts.blacklist, module)) { throw new Error(i18n.t('errors.apps.unsafeAppRequire.error', {msg: module})); } var firstTwo = module.slice(0, 2), resolvedPath, relPath, innerBox, newOpts; // Load relative modules with their own sandbox if (firstTwo === './' || firstTwo === '..') { // Get the path relative to the modules directory resolvedPath = path.resolve(moduleDir, module); // Check relative path from the appRoot for outside requires relPath = path.relative(appRoot, resolvedPath); if (relPath.slice(0, 2) === '..') { throw new Error(i18n.t('errors.apps.unsafeAppRequire.error', {msg: relPath})); } // Assign as new module path module = resolvedPath; // Pass down the same options newOpts = _.extend({}, self.opts); // Make sure the appRoot and parent are appropriate newOpts.appRoot = appRoot; newOpts.parent = currentModule.parent; // Create the inner sandbox for loading this module. innerBox = new AppSandbox(newOpts); return innerBox.loadModule(module); } // Call the original require method for white listed named modules return nodeRequire.call(currentModule, module); }; currentModule.load(currentModule.id); return currentModule.exports; }; AppSandbox.defaults = { blacklist: ['knex', 'fs', 'http', 'sqlite3', 'pg', 'mysql', 'ghost'] }; module.exports = AppSandbox;