@tableau/taco-toolkit
Version:
Tableau Connector Toolkit
139 lines • 11.1 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var isolated_vm_1 = __importDefault(require("isolated-vm"));
var node_fs_1 = __importDefault(require("node:fs"));
var node_path_1 = __importDefault(require("node:path"));
var eps_logger_1 = require("../logging/eps-logger");
var SandboxVM = /** @class */ (function () {
function SandboxVM(memoryLimit) {
if (memoryLimit === void 0) { memoryLimit = 512; }
this.importedModules = new Set();
// We allow the VM to use 512MB of memory. This is more of a guideline instead of a strict limit, it could actually use less or 2-3 times more than this number.
//Since the default 128 was not enough for the connector like Anaplan, we increased the limit to 512 to cover more use cases.
// Create a new isolate limited to 512MB
this.isolate = new isolated_vm_1.default.Isolate({ memoryLimit: memoryLimit });
// this.isolate = new ivm.Isolate({ memoryLimit, inspector: true })
// Create a new context within this isolate. Each context has its own copy of all the builtin
// Objects. So for instance if one context does Object.prototype.foo = 1 this would not affect any
// other contexts.
this.context = this.isolate.createContextSync();
// this.context = this.isolate.createContextSync({ inspector: true })
// this.exposeInspector()
// Get a Reference{} to the global object within the context.
this.global = this.context.global;
// This makes the global object available in the context as `global`. We use `derefInto()` here
// because otherwise `global` would actually be a Reference{} object in the new isolate.
this.addProperty('global');
this.createNativeMethods();
}
SandboxVM.prototype.createNativeMethods = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.executeCode("\n\t\t\tlet globalRefs = {}\n\n\t\t\tasync function requireAsync(name) {\n\t\t\t\tlet fnRef = await this[name];\n\t\t\t\treturn async (...args) => {\n\t\t\t\t\treturn fnRef.applySync(undefined, args, {\n\t\t\t\t\t\targuments: { copy: true },\n\t\t\t\t\t\tresult: { promise: true, copy: true }\n\t\t\t\t\t});\n\t\t\t\t};\n\t\t\t}\n\t\t")];
case 1:
_a.sent();
return [2 /*return*/];
}
});
});
};
SandboxVM.prototype.importModule = function (modulePath) {
return __awaiter(this, void 0, void 0, function () {
var absModulePath, module_1, script, error_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (this.importedModules.has(modulePath)) {
return [2 /*return*/];
}
this.importedModules.add(modulePath);
absModulePath = node_path_1.default.resolve(modulePath);
_a.label = 1;
case 1:
_a.trys.push([1, 5, , 6]);
return [4 /*yield*/, node_fs_1.default.promises.readFile(absModulePath, { encoding: 'utf-8' })];
case 2:
module_1 = _a.sent();
return [4 /*yield*/, this.isolate.compileScript(module_1)];
case 3:
script = _a.sent();
return [4 /*yield*/, script.run(this.context)];
case 4:
_a.sent();
return [3 /*break*/, 6];
case 5:
error_1 = _a.sent();
eps_logger_1.Logger.error("Error occurred during module import:\nModulePath: ".concat(absModulePath, "\nError: ").concat(error_1));
throw error_1;
case 6: return [2 /*return*/];
}
});
});
};
SandboxVM.prototype.addProperty = function (name, value, transferOptions) {
if (value === void 0) { value = this.global.derefInto(); }
this.global.setSync(name, value, transferOptions);
};
SandboxVM.prototype.getProperty = function (name) {
return this.global.getSync(name);
};
SandboxVM.prototype.addMethod = function (name, fn, options) {
if (options === void 0) { options = undefined; }
this.global.setSync(name, fn, options);
};
SandboxVM.prototype.getMethod = function (name) {
return this.global.getSync(name);
};
SandboxVM.prototype.executeCodeWithParameters = function (code, args, options) {
return this.context.evalClosure(code, args, options);
};
SandboxVM.prototype.executeCode = function (code, options) {
return this.context.eval(code, options);
};
SandboxVM.prototype.executeCodeSync = function (code, options) {
return this.context.evalSync(code, options);
};
return SandboxVM;
}());
exports.default = SandboxVM;
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