31 lines
1.2 KiB
TypeScript
31 lines
1.2 KiB
TypeScript
import { existsSync, createReadStream } from 'node:fs'
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import { fileEtag, stillPath, stillPreviewPath, existingStillPreviewPath } from '~/server/utils/library'
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export default defineEventHandler((event) => {
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const { owner } = assertLibraryOwner(event)
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const id = String(getRouterParam(event, 'id') || '')
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const still = getStill(owner, id)
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assertFolderAccess(event, still.folderId)
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const path = existingStillPreviewPath(owner, id)
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const original = stillPath(owner, still.id)
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// Ready preview → stream. Never await ffmpeg; never stream the archive master.
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if (path && existsSync(path) && path !== original) {
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const etag = fileEtag(path)
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setHeader(event, 'ETag', etag)
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setHeader(event, 'Cache-Control', 'public, max-age=86400')
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if (getHeader(event, 'if-none-match') === etag) {
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setResponseStatus(event, 304)
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return null
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}
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setHeader(event, 'Content-Type', 'image/jpeg')
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return sendStream(event, createReadStream(path))
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}
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// Missing → answer now; build .preview.jpg in the background
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void stillPreviewPath(owner, id).catch(() => null)
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setHeader(event, 'Cache-Control', 'no-store')
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setResponseStatus(event, 204)
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return null
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})
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