fix: gacha

utils/network.js

@@ -0,0 +1,31 @@
+import http from 'http';
+import https from 'https';
+export async function checkLatency(url) {
+  let request = http;
+  if (url.startsWith('https')) {
+    request = https;
+  }
+  return new Promise(resolve => {
+    const start = Date.now();
+    request
+      .get(url, res => {
+        res.on('data', () => {});
+        res.on('end', () => {
+          const latency = Date.now() - start;
+          resolve({ url, latency });
+        });
+      })
+      .on('error', err => {
+        logger.mark(`Error checking ${url}:`, err.message);
+        resolve({ url, latency: Infinity });
+      });
+  });
+}
+
+export async function findLowestLatencyUrl(urls) {
+  const results = await Promise.all(urls.map(checkLatency));
+  const lowestLatencyResult = results.reduce((prev, curr) =>
+    prev.latency < curr.latency ? prev : curr
+  );
+  return lowestLatencyResult.url;
+}