puppeteer-extra-plugin-stealth/evasions/navigator.permissions/index.js

Stealth mode: Applies various techniques to make detection of headless puppeteer harder.

'use strict'

const { PuppeteerExtraPlugin } = require('puppeteer-extra-plugin')

/**
 * Pass the Permissions Test.
 */
class Plugin extends PuppeteerExtraPlugin {
  constructor(opts = {}) {
    super(opts)
  }

  get name() {
    return 'stealth/evasions/navigator.permissions'
  }

  async onPageCreated(page) {
    await page.evaluateOnNewDocument(() => {
      const originalQuery = window.navigator.permissions.query
      // eslint-disable-next-line
      window.navigator.permissions.__proto__.query = parameters =>
        parameters.name === 'notifications'
          ? Promise.resolve({ state: Notification.permission }) //eslint-disable-line
          : 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)
      }
      // eslint-disable-next-line
      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)
      }
      // eslint-disable-next-line
      Function.prototype.toString = functionToString
    })
  }
}

module.exports = function(pluginConfig) {
  return new Plugin(pluginConfig)
}