45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
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// Minimal service worker: only exists to catch the POST /share-target
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// request from Android's share sheet (required for Web Share Target to
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// work — the browser needs an installed SW controlling the scope). Stores
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// the shared files in a temporary Cache entry, then redirects to a page
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// that reads them and feeds them into the send flow.
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const SHARE_CACHE = 'flit-share-v1'
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self.addEventListener('install', (event) => {
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self.skipWaiting()
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})
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self.addEventListener('activate', (event) => {
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event.waitUntil(self.clients.claim())
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})
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self.addEventListener('fetch', (event) => {
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const url = new URL(event.request.url)
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if (event.request.method === 'POST' && url.pathname === '/share-target') {
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event.respondWith(handleShareTarget(event))
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}
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})
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async function handleShareTarget(event) {
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const formData = await event.request.formData()
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const files = formData.getAll('files')
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const cache = await caches.open(SHARE_CACHE)
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await cache.put('/shared-files', new Response(await packFiles(files)))
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return Response.redirect('/?shared=1', 303)
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}
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async function packFiles(files) {
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// Pack as a multipart-ish JSON manifest + blobs isn't trivial inside a SW;
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// simplest robust approach: store each file as its own cache entry keyed
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// by index, plus a manifest of names/types.
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const cache = await caches.open(SHARE_CACHE)
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const manifest = []
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for (let i = 0; i < files.length; i++) {
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const f = files[i]
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manifest.push({ name: f.name, type: f.type, size: f.size, key: `/shared-file-${i}` })
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await cache.put(`/shared-file-${i}`, new Response(f))
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}
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return JSON.stringify(manifest)
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}
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