SukkaSurge/Build/build-internal-reverse-chn-cidr.js

// @ts-check
const { fetchRemoteTextAndCreateReadlineInterface } = require('./lib/fetch-remote-text-by-line');
const { processLine } = require('./lib/process-line');
const path = require('path');
const fse = require('fs-extra');
const fs = require('fs');

const RESERVED_IPV4_CIDR = [
  '0.0.0.0/8',
  '10.0.0.0/8',
  '100.64.0.0/10',
  '127.0.0.0/8',
  '169.254.0.0/16',
  '172.16.0.0/12',
  '192.0.0.0/24',
  '192.0.2.0/24',
  '192.168.0.0/16',
  '198.18.0.0/15',
  '198.51.100.0/24',
  '203.0.113.0/24',
  '224.0.0.0/4',
  '233.252.0.0/24',
  '240.0.0.0/4'
];

(async () => {
  const { exclude } = await import('cidr-tools-wasm');

  /** @type {Set<string>} */
  const cidr = new Set();
  for await (const line of await fetchRemoteTextAndCreateReadlineInterface('https://raw.githubusercontent.com/misakaio/chnroutes2/master/chnroutes.txt')) {
    const l = processLine(line);
    if (l) {
      cidr.add(l);
    }
  }

  const reversedCidr = exclude(
    ['0.0.0.0/0'],
    RESERVED_IPV4_CIDR.concat(Array.from(cidr))
  );

  await fse.ensureDir(path.resolve(__dirname, '../List/internal'));
  await fs.promises.writeFile(
    path.resolve(__dirname, '../List/internal/cdn.txt'),
    `${reversedCidr.join('\n')}\n`
  );
})();