puppeteer/examples/detectsniff.js

/**
 * Copyright 2017 Google Inc., PhantomJS Authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const Browser = require('../lib/Browser');

if (process.argv.length < 3) {
  console.log('Usage: detectsniff.js <some URL>');
  return;
}

let address = process.argv[2];
console.log('Checking ' + address + '...');

let browser = new Browser();
browser.newPage().then(async page => {
  await page.evaluateOnNewDocument(function() {
    (function() {
      let userAgent = window.navigator.userAgent,
        platform = window.navigator.platform;

      window.navigator = {
        appCodeName: 'Mozilla',
        appName: 'Netscape',
        cookieEnabled: false,
        sniffed: false
      };

      window.navigator.__defineGetter__('userAgent', function() {
        window.navigator.sniffed = true;
        return userAgent;
      });

      window.navigator.__defineGetter__('platform', function() {
        window.navigator.sniffed = true;
        return platform;
      });
    })();
  });
  let success = await page.navigate(address);
  if (!success) {
    console.log('FAIL to load the address');
    browser.close();
    return;
  }
  setTimeout(async function() {
    let sniffed = await page.evaluate(() => navigator.sniffed);
    if (sniffed)
      console.log('The page tried to sniff the user agent.');
    else
      console.log('The page did not try to sniff the user agent.');

    browser.close();
  }, 1500);
});