e3baa7028c
- the Nitro middleware answers redirect (301/302, Location from the answer only, same-site targets as paths as in v0.1.1) and gone (410) before the render and the route cache, sets X-Robots-Tag, and answers 404 for a pagination.invalid answer; other not_found answers stay with Nuxt - resolve answers cached in an LRU (seo.resolveCacheTtl, default 60 s, 1000 entries) with in-flight de-duplication; a clear detaches loads in flight so no answer fetched before a purge is stored after it - the playground route-caches /blog/** (swr 300)
48 lines
2.2 KiB
TypeScript
48 lines
2.2 KiB
TypeScript
// Resolves every page request through the CMS (resolveCached: LRU and the
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// visitor's X-Forwarded-For) and enforces the decision before Nuxt renders
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// the page and before Nitro's route cache, so swr-cached pages honour a new
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// redirect or 410:
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//
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// redirect 301 or 302 with Location from the answer (seoRedirectTarget:
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// a target on the site's own origin becomes a path, another
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// host stays absolute); nothing from the request (Host, path,
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// query) ever goes into the Location
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// gone 410 with the app's error page
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// not_found left to Nuxt's routing, except a pagination.invalid answer
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// (?page=abc), which is a 404
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//
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// X-Robots-Tag follows the answer (staging: noindex, nofollow everywhere;
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// else the page's x_robots_tag), never on a redirect. Skipped: Nuxt's and
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// the layers' internal paths (/_nuxt, /__nuxt_error, /_seo …), /api and
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// asset files (isPagePath). The answer stays in event.context.seo for the
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// render, which then makes no second call (useSeoResolve). With the CMS
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// unreachable the page renders normally (fail open).
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import { isPagePath } from '../../app/utils/pagePath.ts'
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import { seoRedirectTarget, seoXRobotsTag } from '../../app/utils/seo.ts'
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import { seoServerConfig } from '../lib/config.ts'
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import { resolveCached } from '../lib/resolve.ts'
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export default defineEventHandler(async (event) => {
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if (event.method !== 'GET' && event.method !== 'HEAD') return
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const cfg = seoServerConfig(useRuntimeConfig(event))
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if (!cfg.enabled) return
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const url = event.path
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if (!isPagePath(url, cfg.resolveFiles)) return
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const answer = await resolveCached(event, url)
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event.context.seo = answer
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event.context.seoResolved = { url, answer }
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if (!answer) return
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const target = seoRedirectTarget(answer)
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if (target) return sendRedirect(event, target.to, target.code)
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const robots = seoXRobotsTag(answer)
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if (robots) setResponseHeader(event, 'x-robots-tag', robots)
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if (answer.action === 'gone') throw createError({ statusCode: 410, statusMessage: 'Gone' })
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if (answer.action === 'not_found' && answer.pagination?.invalid === true) {
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throw createError({ statusCode: 404, statusMessage: 'Page Not Found' })
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}
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})
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