asksuite-core/apply-evasions.js

// initial evasions from @sangaline
//   https://intoli.com/blog/not-possible-to-block-chrome-headless/
//   https://intoli.com/blog/not-possible-to-block-chrome-headless/test-headless-final.js

module.exports = async function(page) {
  // Pass the User-Agent Test.
  const userAgent =
    'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36';
  await page.setUserAgent(userAgent);

  // Pass the Webdriver Test.
  await page.evaluateOnNewDocument(() => {
    Object.defineProperty(navigator, 'webdriver', {
      get: () => false,
    });
  });

  // Pass the Chrome Test.
  await page.evaluateOnNewDocument(() => {
    // We can mock this in as much depth as we need for the test.
    window.chrome = {
      runtime: {},
    };
  });

  // Pass the Permissions Test.
  await page.evaluateOnNewDocument(() => {
    const originalQuery = window.navigator.permissions.query;
    window.navigator.permissions.__proto__.query = parameters =>
      parameters.name === 'notifications'
        ? Promise.resolve({ state: Notification.permission })
        : originalQuery(parameters);

    // Inspired by: https://github.com/ikarienator/phantomjs_hide_and_seek/blob/master/5.spoofFunctionBind.js
    const oldCall = Function.prototype.call;

    function call() {
      return oldCall.apply(this, arguments);
    }

    Function.prototype.call = call;

    const nativeToStringFunctionString = Error.toString().replace(/Error/g, 'toString');
    const oldToString = Function.prototype.toString;

    function functionToString() {
      if (this === window.navigator.permissions.query) {
        return 'function query() { [native code] }';
      }
      if (this === functionToString) {
        return nativeToStringFunctionString;
      }
      return oldCall.call(oldToString, this);
    }

    Function.prototype.toString = functionToString;
  });

  // Pass the Plugins Length Test.
  await page.evaluateOnNewDocument(() => {
    // Overwrite the `plugins` property to use a custom getter.
    Object.defineProperty(navigator, 'plugins', {
      // This just needs to have `length > 0` for the current test,
      // but we could mock the plugins too if necessary.
      get: () => [1, 2, 3, 4, 5],
    });
  });

  // Pass the Languages Test.
  await page.evaluateOnNewDocument(() => {
    // Overwrite the `plugins` property to use a custom getter.
    Object.defineProperty(navigator, 'languages', {
      get: () => ['pt-BR', 'pt', 'en-US', 'en', 'es'],
    });
  });

  // Pass the iframe Test
  await page.evaluateOnNewDocument(() => {
    Object.defineProperty(HTMLIFrameElement.prototype, 'contentWindow', {
      get: function() {
        return window;
      },
    });
  });

  // Pass toString test, though it breaks console.debug() from working
  await page.evaluateOnNewDocument(() => {
    window.console.debug = () => {
      return null;
    };
  });

  await page.setExtraHTTPHeaders({
    'accept-encoding': 'gzip, deflate, br',
    'accept-language': 'pt-BR,pt;q=0.9,en-US;q=0.8,en;q=0.7,es;q=0.6',
  });
};