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Google Search CloudFlare detector

2/20/2020, 6:55:52 PM

当前为 2020-08-26 提交的版本，查看 最新版本。

// ==UserScript==
//
// @name        Google Search CloudFlare detector
//
// @namespace   Violentmonkey Scripts
//
// @match       https://www.google.*/search*
//
// @grant       none
//
// @version     1.0
//
// @author      KaKi87
//
// @description 2/20/2020, 6:55:52 PM
//
// ==/UserScript==

const getIp = host => new Promise(resolve => {
  
    fetch(`https://api.kaki87.net/dns/${host}`)
  
      .then(res => res.json())
  
      .then(res => {
      
          if(res.success)
            
              resolve(res.data.find(entry => entry.type === 'A')['value']);
      
          else
            
              return '0.0.0.0';
      
      })
  
});

const isIpInCidr = (ip, cidr) => {
  
    // Source : https://gist.github.com/KaKi87/7c3907a1ec03ebc8ecb0294ab7176bce
  
    const [range, bits = 32] = cidr.split('/');
  
    const mask = ~(2 ** (32 - bits) - 1);
  
    const ip4ToInt = ip => ip.split('.').reduce((int, oct) => (int << 8) + parseInt(oct, 10), 0) >>> 0;
  
    return (ip4ToInt(ip) & mask) === (ip4ToInt(range) & mask);
  
};

const cloudFlareCidrList = [
  
    // Source : https://www.cloudflare.com/ips-v4
  
    '173.245.48.0/20',
  
    '103.21.244.0/22',
  
    '103.22.200.0/22',
  
    '103.31.4.0/22',
  
    '141.101.64.0/18',
  
    '108.162.192.0/18',
  
    '190.93.240.0/20',
  
    '188.114.96.0/20',
  
    '197.234.240.0/22',
  
    '198.41.128.0/17',
  
    '162.158.0.0/15',
  
    '104.16.0.0/12',
  
    '172.64.0.0/13',
  
    '131.0.72.0/22',
  
];

const isCloudFlareIp = ip => !! cloudFlareCidrList.find(cidr => isIpInCidr(ip, cidr));

const links = [...document.querySelectorAll('#search a')]

    .filter(el => !el.id && !el.className);

(async () => {
  
    for(let i = 0; i < links.length; i++){
      
        const element = links[i];
      
        const title = element.querySelector('h3');
      
        const host = element.href.split('/')[2];
      
        const ip = await getIp(host);
      
        if(isCloudFlareIp(ip))
          
            title.innerHTML = `<span style="font-weight: bold; color: red;">(CloudFlare)</span> ${title.textContent}`;
      
    }
  
})();