perf: 优化缓存下载

src/module/index.ts

@@ -7,6 +7,7 @@ import fs from 'fs';
 import { useConfig } from '@abearxiong/use-config';
 import { redis } from './redis/redis.ts';
 import { getContentType } from './get-content-type.ts';
+import { sleep } from '@/utils/sleep.ts';
 const { api, domain, allowedOrigins } = useConfig<{
   api: {
     host: string;
@@ -128,30 +129,38 @@ export const handleRequest = async (req: http.IncomingMessage, res: http.ServerR
   let isExist = await userApp.getExist();
   if (!isExist) {
     try {
-      const hasApp = await userApp.setCacheData();
-      if (!hasApp) {
+      const { code, loading, data } = await userApp.setCacheData();
+      if (loading) {
+        res.writeHead(200, { 'Content-Type': 'text/html' });
+        res.write('Loading App\n');
+        res.end();
+        return;
+      }
+      if (code !== 200) {
         res.writeHead(404, { 'Content-Type': 'text/html' });
         res.write('Not Found App\n');
         res.end();
         return;
       }
+      await sleep(1000);
+      isExist = data; // 设置缓存后再次获取
+      if (!isExist) {
+        res.writeHead(404, { 'Content-Type': 'text/html' });
+        res.write('Not Found App Index Page\n');
+        res.end();
+        return;
+      }
     } catch (error) {
       console.error('setCacheData error', error);
       res.writeHead(500, { 'Content-Type': 'text/html' });
       res.write('Server Error\n');
       res.end();
-      return;
-    }
-
-    isExist = await userApp.getExist();
-    if (!isExist) {
-      res.writeHead(404, { 'Content-Type': 'text/html' });
-      res.write('Not Found App Index Page\n');
-      res.end();
+      userApp.setLoaded();
       return;
     }
   }
-  const indexFile = isExist;
+  const indexFile = isExist; // 已经必定存在了
+
   let appFileUrl: string;
   if (domainApp) {
     appFileUrl = (url + '').replace(`/`, '');