更新前端静态网页获取方式，放弃使用后端获取api

frontend/public/sw.js

@@ -0,0 +1,48 @@
+// Service Worker for InfoGenie App
+const CACHE_NAME = 'infogenie-cache-v1';
+const urlsToCache = [
+  '/',
+  '/index.html',
+  '/manifest.json'
+];
+
+// 安装Service Worker
+self.addEventListener('install', event => {
+  event.waitUntil(
+    caches.open(CACHE_NAME)
+      .then(cache => {
+        console.log('Opened cache');
+        return cache.addAll(urlsToCache);
+      })
+  );
+});
+
+// 拦截请求并从缓存中响应
+self.addEventListener('fetch', event => {
+  event.respondWith(
+    caches.match(event.request)
+      .then(response => {
+        // 如果找到缓存的响应，则返回缓存
+        if (response) {
+          return response;
+        }
+        return fetch(event.request);
+      })
+  );
+});
+
+// 更新Service Worker
+self.addEventListener('activate', event => {
+  const cacheWhitelist = [CACHE_NAME];
+  event.waitUntil(
+    caches.keys().then(cacheNames => {
+      return Promise.all(
+        cacheNames.map(cacheName => {
+          if (cacheWhitelist.indexOf(cacheName) === -1) {
+            return caches.delete(cacheName);
+          }
+        })
+      );
+    })
+  );
+});