Feat: auto generate Telegram CIDR list

Build/build-telegram-cidr.js

@@ -0,0 +1,24 @@
+const { fetch } = require('undici');
+const fs = require('fs');
+const path = require('path');
+
+(async () => {
+  const resp = await fetch('https://core.telegram.org/resources/cidr.txt');
+  const lastModified = new Date(resp.headers.get('last-modified'));
+
+  const res = (await resp.text())
+    .split('\n')
+    .filter(line => line.trim() !== '');
+
+  await fs.promises.writeFile(
+    path.resolve(__dirname, '../List/ip/telegram.conf'),
+    '# Telegram CIDR (https://core.telegram.org/resources/cidr.txt)' + '\n' +
+    '# Last Updated: ' + lastModified.toISOString() + '\n' +
+    res.map(ip => {
+      return ip.includes(':')
+        ? `IP-CIDR6,${ip},no-resolve`
+        : `IP-CIDR,${ip},no-resolve`;
+    }).join('\n') + '\n',
+    'utf-8'
+  );
+})();