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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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