Jakub Zych
0a01bfeae4
- privateRevalidate sets max-age=0 on cache-control values with s-maxage - server/plugins/journal-revalidate.ts wraps res.setHeader per request, so Nitro's 200 and h3's 304 answers both carry it - purge-check: max-age=0 on 200 and 304, purged _payload.json, a second purge after re-caching, X-Real-IP refused, 404 on a server without a token - README: cachePurgeToken row and a Site cache purge section
30 lines
1.4 KiB
TypeScript
30 lines
1.4 KiB
TypeScript
// Browser revalidation of route-cached pages. Nitro's route cache answers
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// 200 with `cache-control: s-maxage=<n>, stale-while-revalidate`, which
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// gives browsers no max-age, so they apply heuristic freshness from
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// Last-Modified; a conditional request it answers 304 with
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// `public, max-age=<n>, s-maxage=<n>`, so after one revalidation a browser
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// could reuse its copy for the whole TTL, past any site cache purge.
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//
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// This plugin passes every cache-control value a response sets through
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// privateRevalidate: values with s-maxage get max-age=0, so browsers ask on
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// each view (a cheap 304 while the page is unchanged) and shared caches keep
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// s-maxage. The 304 path ends the response before any beforeResponse hook
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// runs, so the rewrite wraps the request's res.setHeader instead. Static
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// assets carry no s-maxage and are untouched.
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import { privateRevalidate } from '../../app/utils/siteCache.ts'
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export default defineNitroPlugin((nitroApp) => {
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nitroApp.hooks.hook('request', (event) => {
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const res = event.node.res
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const setHeader = res.setHeader
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res.setHeader = function (name, value) {
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if (typeof name === 'string' && name.toLowerCase() === 'cache-control') {
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if (typeof value === 'string') value = privateRevalidate(value)
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else if (Array.isArray(value)) value = value.map((v) => privateRevalidate(String(v)))
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}
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return setHeader.call(this, name, value)
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} as typeof res.setHeader
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})
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})
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