2328

write-server/nginx/sw.js

@@ -0,0 +1,42 @@
+const CACHE = 'v1';
+const LOGIN = '/login.html';
+
+self.addEventListener('install', () => self.skipWaiting());
+
+self.addEventListener('activate', e => e.waitUntil(self.clients.claim()));
+
+self.addEventListener('fetch', e => {
+  const req = e.request;
+  if (req.url.includes('/login.html') || req.url.includes('/auth/')) {
+    e.respondWith(fetch(req));
+    return;
+  }
+
+  e.respondWith((async () => {
+    const token = self.__auth_token;
+    if (!token) {
+      // 尝试从 IndexedDB/localStorage 读取（SW 中无法直接访问 localStorage）
+      // 依赖客户端页面消息传递 token
+      return fetch(req);
+    }
+
+    const headers = new Headers(req.headers);
+    headers.set('Authorization', 'Basic ' + token);
+    const res = await fetch(new Request(req, { headers }));
+
+    if (res.status === 401) {
+      return Response.redirect(LOGIN, 302);
+    }
+    return res;
+  })());
+});
+
+// 接收页面发来的 token
+self.addEventListener('message', e => {
+  if (e.data && e.data.type === 'SET_TOKEN') {
+    self.__auth_token = e.data.token;
+  }
+  if (e.data && e.data.type === 'CLEAR_TOKEN') {
+    self.__auth_token = null;
+  }
+});