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import { JSDOM } from "npm:jsdom";
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import { userAgent } from "./utils.ts";
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import crypto from "node:crypto";
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interface MockMeta {
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readonly origin: string;
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readonly stack: string;
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readonly duration: number;
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}
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interface HashResults {
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server_hashes: string[];
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client_hashes: string[];
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signals: Record<string, unknown>;
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meta: Record<string, unknown>;
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}
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interface JSExecutionResult {
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server_hashes?: string[];
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client_hashes?: string[];
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signals?: Record<string, unknown>;
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meta?: Record<string, unknown>;
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}
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const mockMeta: MockMeta = {
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origin: "https://duckduckgo.com",
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stack: "",
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duration: Math.floor(Math.random() * 100) + 1,
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} as const;
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class VqdHashGenerator {
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private static extractIIFEJSDOM(jsCode: string): HashResults {
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const results: HashResults = {
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server_hashes: [],
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client_hashes: [],
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signals: {},
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meta: {},
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};
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let dom: JSDOM | null = null;
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try {
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dom = new JSDOM(
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`<!DOCTYPE html><html><head></head><body></body></html>`,
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{
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url: "https://duckduckgo.com",
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referrer: "https://duckduckgo.com",
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pretendToBeVisual: true,
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resources: "usable",
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}
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);
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const { window } = dom;
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globalThis.window = window;
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globalThis.document = window.document;
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const customNavigator = {
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userAgent: userAgent,
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platform: "Win32",
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language: "en-US",
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languages: ["en-US", "en"],
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cookieEnabled: true,
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onLine: true,
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hardwareConcurrency: 4,
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maxTouchPoints: 0,
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vendor: "Google Inc.",
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vendorSub: "",
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productSub: "20030107",
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appName: "Netscape",
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appVersion: userAgent,
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product: "Gecko",
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};
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Object.defineProperty(window, "navigator", {
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value: customNavigator,
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writable: true,
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configurable: true,
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enumerable: true,
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});
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Object.defineProperty(globalThis, "navigator", {
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value: customNavigator,
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writable: true,
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configurable: true,
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enumerable: true,
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});
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delete (window.navigator as any).webdriver;
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const result = window.eval(jsCode) as JSExecutionResult;
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if (result && typeof result === "object") {
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results.server_hashes = result.server_hashes || [];
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results.client_hashes = result.client_hashes || [];
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results.signals = result.signals || {};
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results.meta = result.meta || {};
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}
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} catch (error) {
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console.error("JSDOM execution failed:", error);
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throw new Error(
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`JSDOM执行失败: ${
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error instanceof Error ? error.message : String(error)
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}`
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);
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} finally {
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if (dom) {
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dom.window.close();
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}
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delete globalThis.window;
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delete globalThis.document;
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delete globalThis.navigator;
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}
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return results;
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}
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private static hashClientValues(mockClientHashes: string[]): string[] {
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return mockClientHashes.map((value: string): string => {
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const hash = crypto.createHash("sha256");
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hash.update(value, "utf8");
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return hash.digest("base64");
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});
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}
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static generate(vqdHashRequest: string): string {
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if (!vqdHashRequest || typeof vqdHashRequest !== "string") {
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throw new Error("VQD Hash 请求参数无效");
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}
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try {
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const jsCode = atob(vqdHashRequest);
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const hash = this.extractIIFEJSDOM(jsCode);
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hash.client_hashes = this.hashClientValues(hash.client_hashes);
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hash.meta = {
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...hash.meta,
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...mockMeta,
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};
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return btoa(JSON.stringify(hash));
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} catch (error) {
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console.error("generateVqdHash 执行失败:", error);
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throw new Error(
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`VQD Hash 生成失败: ${
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error instanceof Error ? error.message : String(error)
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}`
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);
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}
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}
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}
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export function generateVqdHash(vqdHashRequest: string): string {
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return VqdHashGenerator.generate(vqdHashRequest);
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}
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export { VqdHashGenerator };
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export type { HashResults, MockMeta, JSExecutionResult };
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