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af754dc31f
SW 之前以 network-first 接管所有导航请求，疑似在 Safari 下令 Casdoor→应用的回跳导航长时间挂起（~2min 似卡在 Casdoor 页）。改为：导航、/api、跨源一律直通网络，SW 只对同源 hash 化静态资源做 stale-while-revalidate。cdrop 离线无意义，放弃导航壳缓存无损失。cache 版本 bump v2 清旧缓存。
63 lines
2.4 KiB
JavaScript
63 lines
2.4 KiB
JavaScript
// cdrop service worker — makes the web app installable and caches hashed static
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// assets for faster repeat loads.
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//
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// Deliberately minimal. It does NOT intercept:
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// - /api/* — SSE (/api/hub/events), clipboard, signaling, relay need a
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// live, unbuffered connection; and the OAuth exchange/refresh
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// must not be cached.
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// - navigations — page loads / OAuth redirects go straight to the network.
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// (A SW that mediates navigations was stalling the Casdoor →
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// app redirect for ~2 min in Safari; cdrop is useless offline
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// anyway, so there's nothing to gain by caching the shell.)
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// - cross-origin — fonts / CDN are left to the browser.
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//
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// What's left: hashed JS/CSS/image assets, served stale-while-revalidate.
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const CACHE = "cdrop-assets-v2";
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self.addEventListener("install", (event) =>
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{
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// No precache — assets are cached lazily on first fetch. Activate immediately.
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event.waitUntil(self.skipWaiting());
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});
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self.addEventListener("activate", (event) =>
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{
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event.waitUntil(
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caches.keys()
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.then((keys) => Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k))))
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.then(() => self.clients.claim()),
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);
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});
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self.addEventListener("fetch", (event) =>
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{
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const req = event.request;
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if (req.method !== "GET") { return; }
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if (req.mode === "navigate") { return; } // page loads / OAuth redirects → network
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const url = new URL(req.url);
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if (url.origin !== self.location.origin) { return; } // cross-origin (fonts/CDN) → browser default
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if (url.pathname.startsWith("/api/")) { return; } // live backend → never intercept
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// Static assets (Vite emits content-hashed, immutable files): serve cache
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// immediately, refresh in the background.
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event.respondWith(
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caches.match(req).then((cached) =>
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{
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const network = fetch(req)
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.then((resp) =>
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{
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if (resp && resp.status === 200 && resp.type === "basic")
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{
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const copy = resp.clone();
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caches.open(CACHE).then((c) => c.put(req, copy)).catch(() => {});
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}
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return resp;
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})
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.catch(() => cached);
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return cached || network;
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}),
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);
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});
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