SukkaSurge/Build/lib/is-domain-alive.ts

import DNS2 from 'dns2';
import asyncRetry from 'async-retry';
import picocolors from 'picocolors';
import { looseTldtsOpt } from '../constants/loose-tldts-opt';
import { createKeyedAsyncMutex } from './keyed-async-mutex';
import tldts from 'tldts-experimental';
import * as whoiser from 'whoiser';
import process from 'node:process';
import { createRetrieKeywordFilter as createKeywordFilter } from 'foxts/retrie';
import { shuffleArray } from 'foxts/shuffle-array';

const domainAliveMap = new Map<string, boolean>();

class DnsError extends Error {
  name = 'DnsError';
  constructor(readonly message: string, public readonly server: string) {
    super(message);
  }
}

interface DnsResponse extends DNS2.$DnsResponse {
  dns: string
}

const dohServers: Array<[string, DNS2.DnsResolver]> = ([
  '8.8.8.8',
  '8.8.4.4',
  '1.0.0.1',
  '1.1.1.1',
  '162.159.36.1',
  '162.159.46.1',
  'dns.cloudflare.com', // Cloudflare DoH that uses different IPs
  // one.one.one.one // Cloudflare DoH that uses 1.1.1.1 and 1.0.0.1
  '101.101.101.101', // TWNIC
  '185.222.222.222', // DNS.SB
  '45.11.45.11', // DNS.SB
  'doh.dns.sb', // DNS.SB, Different PoPs w/ GeoDNS
  // 'doh.sb', // DNS.SB xTom Anycast IP
  // 'dns.sb', // DNS.SB use same xTom Anycast IP as doh.sb
  'dns10.quad9.net', // Quad9 unfiltered
  'doh.sandbox.opendns.com', // OpenDNS sandbox (unfiltered)
  'unfiltered.adguard-dns.com',
  // '0ms.dev', // Proxy Cloudflare
  // '76.76.2.0', // ControlD unfiltered, path not /dns-query
  // '76.76.10.0', // ControlD unfiltered, path not /dns-query
  // 'dns.bebasid.com', // BebasID, path not /dns-query but /unfiltered
  // '193.110.81.0', // dns0.eu
  // '185.253.5.0', // dns0.eu
  // 'zero.dns0.eu',
  'dns.nextdns.io',
  'anycast.dns.nextdns.io',
  'wikimedia-dns.org',
  'puredns.org',
  // 'ordns.he.net',
  // 'dns.mullvad.net',
  'basic.rethinkdns.com'
  // '198.54.117.10' // NameCheap DNS, supports DoT, DoH, UDP53
  // 'ada.openbld.net',
  // 'dns.rabbitdns.org'
] as const).map(dns => [
  dns,
  DNS2.DOHClient({
    dns,
    http: false
  })
] as const);

const domesticDohServers: Array<[string, DNS2.DnsResolver]> = ([
  '223.5.5.5',
  '223.6.6.6',
  '120.53.53.53',
  '1.12.12.12'
] as const).map(dns => [
  dns,
  DNS2.DOHClient({
    dns,
    http: false
  })
] as const);

const domainAliveMutex = createKeyedAsyncMutex('isDomainAlive');

export async function isDomainAlive(
  domain: string,
  // we dont need to check domain[0] here, this is only from runAgainstSourceFile
  isIncludeAllSubdomain: boolean
): Promise<boolean> {
  if (domainAliveMap.has(domain)) {
    return domainAliveMap.get(domain)!;
  }
  const apexDomain = tldts.getDomain(domain, looseTldtsOpt);
  if (!apexDomain) {
    // console.log(picocolors.gray('[domain invalid]'), picocolors.gray('no apex domain'), { domain });
    domainAliveMap.set('.' + domain, true);
    return true;
  }

  const apexDomainAlive = await isApexDomainAlive(apexDomain);
  if (isIncludeAllSubdomain || domain.length > apexDomain.length) {
    return apexDomainAlive;
  }
  if (!apexDomainAlive) {
    return false;
  }

  return domainAliveMutex.acquire(domain, async () => {
    domain = domain[0] === '.' ? domain.slice(1) : domain;

    const aDns: string[] = [];
    const aaaaDns: string[] = [];

    // test 2 times before make sure record is empty
    const servers = shuffleArray(dohServers, { copy: true });

    for (let i = 0, len = servers.length; i < len; i++) {
      try {
        // eslint-disable-next-line no-await-in-loop -- sequential
        const aRecords = (await $resolve(domain, 'A', servers[i]));
        if (aRecords.answers.length > 0) {
          domainAliveMap.set(domain, true);
          return true;
        }

        aDns.push(aRecords.dns);
      } catch {}

      if (aDns.length >= 2) {
        break; // we only need to test 2 times
      }
    }

    for (let i = 0, len = servers.length; i < len; i++) {
      try {
        // eslint-disable-next-line no-await-in-loop -- sequential
        const aaaaRecords = await $resolve(domain, 'AAAA', servers[i]);
        if (aaaaRecords.answers.length > 0) {
          domainAliveMap.set(domain, true);
          return true;
        }

        aaaaDns.push(aaaaRecords.dns);
      } catch {}

      if (aaaaDns.length >= 2) {
        break; // we only need to test 2 times
      }
    }

    // only then, let's test twice with domesticDohServers
    const domesticServers = shuffleArray(domesticDohServers, { copy: true });
    for (let i = 0, len = domesticServers.length; i < len; i++) {
      try {
        // eslint-disable-next-line no-await-in-loop -- sequential
        const aRecords = await $resolve(domain, 'A', domesticServers[i]);
        if (aRecords.answers.length > 0) {
          domainAliveMap.set(domain, true);
          return true;
        }
        aDns.push(aRecords.dns);
      } catch {}
      if (aDns.length >= 2) {
        break; // we only need to test 2 times
      }
    }

    for (let i = 0, len = domesticServers.length; i < len; i++) {
      try {
        // eslint-disable-next-line no-await-in-loop -- sequential
        const aaaaRecords = await $resolve(domain, 'AAAA', domesticServers[i]);
        if (aaaaRecords.answers.length > 0) {
          domainAliveMap.set(domain, true);
          return true;
        }
        aaaaDns.push(aaaaRecords.dns);
      } catch {}

      if (aaaaDns.length >= 2) {
        break; // we only need to test 2 times
      }
    }

    console.log(picocolors.red('[domain dead]'), 'no A/AAAA records', { domain, a: aDns, aaaa: aaaaDns });

    domainAliveMap.set(domain, false);
    return false;
  });
}

const apexDomainMap = createKeyedAsyncMutex('isApexDomainAlive');

function isApexDomainAlive(apexDomain: string) {
  if (domainAliveMap.has(apexDomain)) {
    return domainAliveMap.get(apexDomain)!;
  }

  return apexDomainMap.acquire(apexDomain, async () => {
    const servers = shuffleArray(dohServers, { copy: true });

    let nsSuccess = 0;

    for (let i = 0, len = servers.length; i < len; i++) {
      const server = servers[i];
      try {
        // eslint-disable-next-line no-await-in-loop -- one by one
        const resp = await $resolve(apexDomain, 'NS', server);
        if (resp.answers.length > 0) {
          domainAliveMap.set(apexDomain, true);
          return true;
        }

        nsSuccess++;

        if (nsSuccess >= 2) {
          // we only need to test 2 times
          break;
        }
      } catch {}
    }

    let whois;
    try {
      whois = await getWhois(apexDomain);
    } catch (e) {
      console.log(picocolors.red('[whois error]'), { domain: apexDomain }, e);
      domainAliveMap.set(apexDomain, true);
      return true;
    }

    const whoisError = noWhois(whois);
    if (!whoisError) {
      console.log(picocolors.gray('[domain alive]'), picocolors.gray('whois found'), { domain: apexDomain });
      domainAliveMap.set(apexDomain, true);
      return true;
    }

    console.log(picocolors.red('[domain dead]'), 'whois not found', { domain: apexDomain, err: whoisError });

    domainAliveMap.set(apexDomain, false);
    return false;
  });
}

async function $resolve(name: string, type: DNS2.PacketQuestion, server: [string, DNS2.DnsResolver]) {
  try {
    return await asyncRetry(async () => {
      const [dohServer, dohClient] = server;

      try {
        return {
          ...await dohClient(name, type),
          dns: dohServer
        } satisfies DnsResponse;
      } catch (e) {
        // console.error(e);
        throw new DnsError((e as Error).message, dohServer);
      }
    }, { retries: 5 });
  } catch (e) {
    console.log('[doh error]', name, type, e);
    throw e;
  }
}

async function getWhois(domain: string) {
  return asyncRetry(() => whoiser.domain(domain, { raw: true }), { retries: 5 });
}

// TODO: this is a workaround for https://github.com/LayeredStudio/whoiser/issues/117
const whoisNotFoundKeywordTest = createKeywordFilter([
  'no match for',
  'does not exist',
  'not found',
  'no found',
  'no entries',
  'no data found',
  'is available for registration',
  'currently available for application',
  'no matching record',
  'no information available about domain name',
  'not been registered',
  'no match!!',
  'status: available',
  ' is free',
  'no object found',
  'nothing found',
  'status: free',
  // 'pendingdelete',
  ' has been blocked by '
]);
// whois server can redirect, so whoiser might/will get info from multiple whois servers
// some servers (like TLD whois servers) might have cached/outdated results
// we can only make sure a domain is alive once all response from all whois servers demonstrate so
function noWhois(whois: whoiser.WhoisSearchResult): null | string {
  let empty = true;

  for (const key in whois) {
    if (Object.hasOwn(whois, key)) {
      empty = false;

      // if (key === 'error') {
      //   // if (
      //   //   (typeof whois.error === 'string' && whois.error)
      //   //   || (Array.isArray(whois.error) && whois.error.length > 0)
      //   // ) {
      //   //   console.error(whois);
      //   //   return true;
      //   // }
      //   continue;
      // }

      // if (key === 'text') {
      //   if (Array.isArray(whois.text)) {
      //     for (const value of whois.text) {
      //       if (whoisNotFoundKeywordTest(value.toLowerCase())) {
      //         return value;
      //       }
      //     }
      //   }
      //   continue;
      // }
      // if (key === 'Name Server') {
      //   // if (Array.isArray(whois[key]) && whois[key].length === 0) {
      //   //   return false;
      //   // }
      //   continue;
      // }

      // if (key === 'Domain Status') {
      //   if (Array.isArray(whois[key])) {
      //     for (const status of whois[key]) {
      //       if (status === 'free' || status === 'AVAILABLE') {
      //         return key + ': ' + status;
      //       }
      //       if (whoisNotFoundKeywordTest(status.toLowerCase())) {
      //         return key + ': ' + status;
      //       }
      //     }
      //   }

      //   continue;
      // }

      // if (typeof whois[key] === 'string' && whois[key]) {
      //   if (whoisNotFoundKeywordTest(whois[key].toLowerCase())) {
      //     return key + ': ' + whois[key];
      //   }

      //   continue;
      // }

      if (key === '__raw' && typeof whois.__raw === 'string') {
        const lines = whois.__raw.trim().toLowerCase().replaceAll(/[\t ]+/g, ' ').split(/\r?\n/);

        if (process.env.DEBUG) {
          console.log({ lines });
        }

        for (const line of lines) {
          if (whoisNotFoundKeywordTest(line)) {
            return line;
          }
        }
        continue;
      }

      if (typeof whois[key] === 'object' && !Array.isArray(whois[key])) {
        const tmp = noWhois(whois[key]);
        if (tmp) {
          return tmp;
        }
        continue;
      }
    }
  }

  if (empty) {
    return 'whois is empty';
  }

  return null;
}