🎨 Refactoring CLI

bin/utils/ip.ts

@@ -0,0 +1,47 @@
+import dns from 'dns';
+import http from 'http';
+import { promisify } from 'util';
+import logger from '@/options/logger';
+
+const resolve = promisify(dns.resolve);
+
+const ping = async (host: string) => {
+  const lookup = promisify(dns.lookup);
+  const ip = await lookup(host);
+  const start = new Date();
+
+  return new Promise<number>((resolve, reject) => {
+    const req = http.get(`http://${ip.address}`, (res) => {
+      const delay = new Date().getTime() - start.getTime();
+      res.resume();
+      resolve(delay);
+    });
+
+    req.on('error', (err) => {
+      reject(err);
+    });
+  });
+};
+
+async function isChinaDomain(domain: string): Promise<boolean> {
+  try {
+    const [ip] = await resolve(domain);
+    return await isChinaIP(ip, domain);
+  } catch (error) {
+    logger.info(`${domain} can't be parse!`);
+    return false;
+  }
+}
+
+async function isChinaIP(ip: string, domain: string): Promise<boolean> {
+  try {
+    const delay = await ping(ip);
+    logger.info(`${domain} latency is ${delay} ms`);
+    return delay > 500;
+  } catch (error) {
+    logger.info(`ping ${domain} failed!`);
+    return false;
+  }
+}
+
+export { isChinaDomain, isChinaIP };