87ed37d51c
This insures we add entries for each locale version of a non-dynamic SSG page since they can have unique revalidate values. This requires a version bump in the `prerender-manifest` since the static routes now contain additional values which need to be handled separately. Fixes: https://github.com/vercel/next.js/issues/21568
213 lines
5.9 KiB
TypeScript
213 lines
5.9 KiB
TypeScript
import { promises, readFileSync } from 'fs'
|
|
import LRUCache from 'next/dist/compiled/lru-cache'
|
|
import path from 'path'
|
|
import { PrerenderManifest } from '../../build'
|
|
import { PRERENDER_MANIFEST } from '../lib/constants'
|
|
import { normalizePagePath } from './normalize-page-path'
|
|
|
|
function toRoute(pathname: string): string {
|
|
return pathname.replace(/\/$/, '').replace(/\/index$/, '') || '/'
|
|
}
|
|
|
|
type IncrementalCacheValue = {
|
|
html?: string
|
|
pageData?: any
|
|
isStale?: boolean
|
|
isNotFound?: boolean
|
|
isRedirect?: boolean
|
|
curRevalidate?: number | false
|
|
// milliseconds to revalidate after
|
|
revalidateAfter: number | false
|
|
}
|
|
|
|
export class IncrementalCache {
|
|
incrementalOptions: {
|
|
flushToDisk?: boolean
|
|
pagesDir?: string
|
|
distDir?: string
|
|
dev?: boolean
|
|
}
|
|
|
|
prerenderManifest: PrerenderManifest
|
|
cache: LRUCache<string, IncrementalCacheValue>
|
|
locales?: string[]
|
|
|
|
constructor({
|
|
max,
|
|
dev,
|
|
distDir,
|
|
pagesDir,
|
|
flushToDisk,
|
|
locales,
|
|
}: {
|
|
dev: boolean
|
|
max?: number
|
|
distDir: string
|
|
pagesDir: string
|
|
flushToDisk?: boolean
|
|
locales?: string[]
|
|
}) {
|
|
this.incrementalOptions = {
|
|
dev,
|
|
distDir,
|
|
pagesDir,
|
|
flushToDisk:
|
|
!dev && (typeof flushToDisk !== 'undefined' ? flushToDisk : true),
|
|
}
|
|
this.locales = locales
|
|
|
|
if (dev) {
|
|
this.prerenderManifest = {
|
|
version: -1 as any, // letting us know this doesn't conform to spec
|
|
routes: {},
|
|
dynamicRoutes: {},
|
|
notFoundRoutes: [],
|
|
preview: null as any, // `preview` is special case read in next-dev-server
|
|
}
|
|
} else {
|
|
this.prerenderManifest = JSON.parse(
|
|
readFileSync(path.join(distDir, PRERENDER_MANIFEST), 'utf8')
|
|
)
|
|
}
|
|
|
|
this.cache = new LRUCache({
|
|
// default to 50MB limit
|
|
max: max || 50 * 1024 * 1024,
|
|
length(val) {
|
|
if (val.isNotFound || val.isRedirect) return 25
|
|
// rough estimate of size of cache value
|
|
return val.html!.length + JSON.stringify(val.pageData).length
|
|
},
|
|
})
|
|
}
|
|
|
|
private getSeedPath(pathname: string, ext: string): string {
|
|
return path.join(this.incrementalOptions.pagesDir!, `${pathname}.${ext}`)
|
|
}
|
|
|
|
private calculateRevalidate(pathname: string): number | false {
|
|
pathname = toRoute(pathname)
|
|
|
|
// in development we don't have a prerender-manifest
|
|
// and default to always revalidating to allow easier debugging
|
|
const curTime = new Date().getTime()
|
|
if (this.incrementalOptions.dev) return curTime - 1000
|
|
|
|
const { initialRevalidateSeconds } = this.prerenderManifest.routes[
|
|
pathname
|
|
] || {
|
|
initialRevalidateSeconds: 1,
|
|
}
|
|
const revalidateAfter =
|
|
typeof initialRevalidateSeconds === 'number'
|
|
? initialRevalidateSeconds * 1000 + curTime
|
|
: initialRevalidateSeconds
|
|
|
|
return revalidateAfter
|
|
}
|
|
|
|
getFallback(page: string): Promise<string> {
|
|
page = normalizePagePath(page)
|
|
return promises.readFile(this.getSeedPath(page, 'html'), 'utf8')
|
|
}
|
|
|
|
// get data from cache if available
|
|
async get(pathname: string): Promise<IncrementalCacheValue | void> {
|
|
if (this.incrementalOptions.dev) return
|
|
pathname = normalizePagePath(pathname)
|
|
|
|
let data = this.cache.get(pathname)
|
|
|
|
// let's check the disk for seed data
|
|
if (!data) {
|
|
if (this.prerenderManifest.notFoundRoutes.includes(pathname)) {
|
|
return { isNotFound: true, revalidateAfter: false }
|
|
}
|
|
|
|
try {
|
|
const html = await promises.readFile(
|
|
this.getSeedPath(pathname, 'html'),
|
|
'utf8'
|
|
)
|
|
const pageData = JSON.parse(
|
|
await promises.readFile(this.getSeedPath(pathname, 'json'), 'utf8')
|
|
)
|
|
|
|
data = {
|
|
html,
|
|
pageData,
|
|
revalidateAfter: this.calculateRevalidate(pathname),
|
|
}
|
|
this.cache.set(pathname, data)
|
|
} catch (_) {
|
|
// unable to get data from disk
|
|
}
|
|
}
|
|
|
|
if (
|
|
data &&
|
|
data.revalidateAfter !== false &&
|
|
data.revalidateAfter < new Date().getTime()
|
|
) {
|
|
data.isStale = true
|
|
}
|
|
|
|
const manifestPath = toRoute(pathname)
|
|
const manifestEntry = this.prerenderManifest.routes[manifestPath]
|
|
|
|
if (data && manifestEntry) {
|
|
data.curRevalidate = manifestEntry.initialRevalidateSeconds
|
|
}
|
|
return data
|
|
}
|
|
|
|
// populate the incremental cache with new data
|
|
async set(
|
|
pathname: string,
|
|
data: {
|
|
html?: string
|
|
pageData?: any
|
|
isNotFound?: boolean
|
|
isRedirect?: boolean
|
|
},
|
|
revalidateSeconds?: number | false
|
|
) {
|
|
if (this.incrementalOptions.dev) return
|
|
if (typeof revalidateSeconds !== 'undefined') {
|
|
// TODO: Update this to not mutate the manifest from the
|
|
// build.
|
|
this.prerenderManifest.routes[pathname] = {
|
|
dataRoute: path.posix.join(
|
|
'/_next/data',
|
|
`${normalizePagePath(pathname)}.json`
|
|
),
|
|
srcRoute: null, // FIXME: provide actual source route, however, when dynamically appending it doesn't really matter
|
|
initialRevalidateSeconds: revalidateSeconds,
|
|
}
|
|
}
|
|
|
|
pathname = normalizePagePath(pathname)
|
|
this.cache.set(pathname, {
|
|
...data,
|
|
revalidateAfter: this.calculateRevalidate(pathname),
|
|
})
|
|
|
|
// TODO: This option needs to cease to exist unless it stops mutating the
|
|
// `next build` output's manifest.
|
|
if (this.incrementalOptions.flushToDisk && !data.isNotFound) {
|
|
try {
|
|
const seedPath = this.getSeedPath(pathname, 'html')
|
|
await promises.mkdir(path.dirname(seedPath), { recursive: true })
|
|
await promises.writeFile(seedPath, data.html, 'utf8')
|
|
await promises.writeFile(
|
|
this.getSeedPath(pathname, 'json'),
|
|
JSON.stringify(data.pageData),
|
|
'utf8'
|
|
)
|
|
} catch (error) {
|
|
// failed to flush to disk
|
|
console.warn('Failed to update prerender files for', pathname, error)
|
|
}
|
|
}
|
|
}
|
|
}
|