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/
base-server.ts
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/
base-server.ts
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import type { __ApiPreviewProps } from './api-utils'
import type { CustomRoutes, Header } from '../lib/load-custom-routes'
import type { DomainLocale } from './config'
import type { DynamicRoutes, PageChecker, Params, Route } from './router'
import type { FetchEventResult } from './web/types'
import type { FontManifest } from './font-utils'
import type { IncomingMessage, ServerResponse } from 'http'
import type { LoadComponentsReturnType } from './load-components'
import type { MiddlewareManifest } from '../build/webpack/plugins/middleware-plugin'
import type { NextApiRequest, NextApiResponse } from '../shared/lib/utils'
import type { NextConfig, NextConfigComplete } from './config-shared'
import type { NextParsedUrlQuery, NextUrlWithParsedQuery } from './request-meta'
import type { ParsedNextUrl } from '../shared/lib/router/utils/parse-next-url'
import type { ParsedUrl } from '../shared/lib/router/utils/parse-url'
import type { ParsedUrlQuery } from 'querystring'
import type { PrerenderManifest } from '../build'
import type { Redirect, Rewrite, RouteType } from '../lib/load-custom-routes'
import type { RenderOpts, RenderOptsPartial } from './render'
import type { ResponseCacheEntry, ResponseCacheValue } from './response-cache'
import type { UrlWithParsedQuery } from 'url'
import compression from 'next/dist/compiled/compression'
import Proxy from 'next/dist/compiled/http-proxy'
import { join, relative, resolve, sep } from 'path'
import { parse as parseQs, stringify as stringifyQs } from 'querystring'
import { format as formatUrl, parse as parseUrl } from 'url'
import { getRedirectStatus, modifyRouteRegex } from '../lib/load-custom-routes'
import {
CLIENT_PUBLIC_FILES_PATH,
CLIENT_STATIC_FILES_PATH,
CLIENT_STATIC_FILES_RUNTIME,
PERMANENT_REDIRECT_STATUS,
PRERENDER_MANIFEST,
ROUTES_MANIFEST,
SERVERLESS_DIRECTORY,
SERVER_DIRECTORY,
STATIC_STATUS_PAGES,
TEMPORARY_REDIRECT_STATUS,
MIDDLEWARE_MANIFEST,
} from '../shared/lib/constants'
import {
getRouteMatcher,
getRouteRegex,
getSortedRoutes,
isDynamicRoute,
getMiddlewareRegex,
} from '../shared/lib/router/utils'
import * as envConfig from '../shared/lib/runtime-config'
import {
DecodeError,
isResSent,
normalizeRepeatedSlashes,
} from '../shared/lib/utils'
import {
apiResolver,
setLazyProp,
getCookieParser,
tryGetPreviewData,
} from './api-utils'
import { isTargetLikeServerless } from './config'
import pathMatch from '../shared/lib/router/utils/path-match'
import { loadComponents } from './load-components'
import { normalizePagePath } from './normalize-page-path'
import { renderToHTML } from './render'
import { getPagePath, requireFontManifest } from './require'
import Router, { replaceBasePath, route } from './router'
import {
compileNonPath,
prepareDestination,
} from '../shared/lib/router/utils/prepare-destination'
import { sendRenderResult, setRevalidateHeaders } from './send-payload'
import { serveStatic } from './serve-static'
import { IncrementalCache } from './incremental-cache'
import { execOnce } from '../shared/lib/utils'
import { isBlockedPage, isBot } from './utils'
import RenderResult from './render-result'
import { loadEnvConfig } from '@next/env'
import './node-polyfill-fetch'
import { PagesManifest } from '../build/webpack/plugins/pages-manifest-plugin'
import { removePathTrailingSlash } from '../client/normalize-trailing-slash'
import getRouteFromAssetPath from '../shared/lib/router/utils/get-route-from-asset-path'
import { denormalizePagePath } from './denormalize-page-path'
import { normalizeLocalePath } from '../shared/lib/i18n/normalize-locale-path'
import * as Log from '../build/output/log'
import { detectDomainLocale } from '../shared/lib/i18n/detect-domain-locale'
import escapePathDelimiters from '../shared/lib/router/utils/escape-path-delimiters'
import { getUtils } from '../build/webpack/loaders/next-serverless-loader/utils'
import { PreviewData } from 'next/types'
import ResponseCache from './response-cache'
import { parseNextUrl } from '../shared/lib/router/utils/parse-next-url'
import isError from '../lib/is-error'
import { getMiddlewareInfo } from './require'
import { MIDDLEWARE_ROUTE } from '../lib/constants'
import { run } from './web/sandbox'
import { addRequestMeta, getRequestMeta } from './request-meta'
import { toNodeHeaders } from './web/utils'
import { relativizeURL } from '../shared/lib/router/utils/relativize-url'
const getCustomRouteMatcher = pathMatch(true)
type ExpressMiddleware = (
req: IncomingMessage,
res: ServerResponse,
next: (err?: Error) => void
) => void
export type FindComponentsResult = {
components: LoadComponentsReturnType
query: NextParsedUrlQuery
}
interface RoutingItem {
page: string
match: ReturnType<typeof getRouteMatcher>
ssr?: boolean
}
export interface Options {
/**
* Object containing the configuration next.config.js
*/
conf: NextConfig
/**
* Set to false when the server was created by Next.js
*/
customServer?: boolean
/**
* Tells if Next.js is running in dev mode
*/
dev?: boolean
/**
* Where the Next project is located
*/
dir?: string
/**
* Tells if Next.js is running in a Serverless platform
*/
minimalMode?: boolean
/**
* Hide error messages containing server information
*/
quiet?: boolean
/**
* The hostname the server is running behind
*/
hostname?: string
/**
* The port the server is running behind
*/
port?: number
}
export interface RequestHandler {
(
req: IncomingMessage,
res: ServerResponse,
parsedUrl?: NextUrlWithParsedQuery | undefined
): Promise<void>
}
type RequestContext = {
req: IncomingMessage
res: ServerResponse
pathname: string
query: NextParsedUrlQuery
renderOpts: RenderOptsPartial
}
export default abstract class Server {
protected dir: string
protected quiet: boolean
protected nextConfig: NextConfigComplete
protected distDir: string
protected pagesDir?: string
protected publicDir: string
protected hasStaticDir: boolean
protected serverBuildDir: string
protected pagesManifest?: PagesManifest
protected buildId: string
protected minimalMode: boolean
protected renderOpts: {
poweredByHeader: boolean
buildId: string
generateEtags: boolean
runtimeConfig?: { [key: string]: any }
assetPrefix?: string
canonicalBase: string
dev?: boolean
previewProps: __ApiPreviewProps
customServer?: boolean
ampOptimizerConfig?: { [key: string]: any }
basePath: string
optimizeFonts: boolean
images: string
fontManifest: FontManifest
optimizeImages: boolean
disableOptimizedLoading?: boolean
optimizeCss: any
locale?: string
locales?: string[]
defaultLocale?: string
domainLocales?: DomainLocale[]
distDir: string
concurrentFeatures?: boolean
crossOrigin?: string
}
private compression?: ExpressMiddleware
private incrementalCache: IncrementalCache
private responseCache: ResponseCache
protected router: Router
protected dynamicRoutes?: DynamicRoutes
protected customRoutes: CustomRoutes
protected middlewareManifest?: MiddlewareManifest
protected middleware?: RoutingItem[]
public readonly hostname?: string
public readonly port?: number
protected abstract getHasStaticDir(): boolean
protected abstract getPagesManifest(): PagesManifest | undefined
protected abstract getBuildId(): string
protected abstract generatePublicRoutes(): Route[]
protected abstract getFilesystemPaths(): Set<string>
public constructor({
dir = '.',
quiet = false,
conf,
dev = false,
minimalMode = false,
customServer = true,
hostname,
port,
}: Options) {
this.dir = resolve(dir)
this.quiet = quiet
loadEnvConfig(this.dir, dev, Log)
// TODO: should conf be normalized to prevent missing
// values from causing issues as this can be user provided
this.nextConfig = conf as NextConfigComplete
this.hostname = hostname
this.port = port
this.distDir = join(this.dir, this.nextConfig.distDir)
this.publicDir = join(this.dir, CLIENT_PUBLIC_FILES_PATH)
this.hasStaticDir = !minimalMode && this.getHasStaticDir()
// Only serverRuntimeConfig needs the default
// publicRuntimeConfig gets it's default in client/index.js
const {
serverRuntimeConfig = {},
publicRuntimeConfig,
assetPrefix,
generateEtags,
compress,
} = this.nextConfig
this.buildId = this.getBuildId()
this.minimalMode = minimalMode
this.renderOpts = {
poweredByHeader: this.nextConfig.poweredByHeader,
canonicalBase: this.nextConfig.amp.canonicalBase || '',
buildId: this.buildId,
generateEtags,
previewProps: this.getPreviewProps(),
customServer: customServer === true ? true : undefined,
ampOptimizerConfig: this.nextConfig.experimental.amp?.optimizer,
basePath: this.nextConfig.basePath,
images: JSON.stringify(this.nextConfig.images),
optimizeFonts: !!this.nextConfig.optimizeFonts && !dev,
fontManifest:
this.nextConfig.optimizeFonts && !dev
? requireFontManifest(this.distDir, this._isLikeServerless)
: null,
optimizeImages: !!this.nextConfig.experimental.optimizeImages,
optimizeCss: this.nextConfig.experimental.optimizeCss,
disableOptimizedLoading:
this.nextConfig.experimental.disableOptimizedLoading,
domainLocales: this.nextConfig.i18n?.domains,
distDir: this.distDir,
concurrentFeatures: this.nextConfig.experimental.concurrentFeatures,
crossOrigin: this.nextConfig.crossOrigin
? this.nextConfig.crossOrigin
: undefined,
}
// Only the `publicRuntimeConfig` key is exposed to the client side
// It'll be rendered as part of __NEXT_DATA__ on the client side
if (Object.keys(publicRuntimeConfig).length > 0) {
this.renderOpts.runtimeConfig = publicRuntimeConfig
}
if (compress && this.nextConfig.target === 'server') {
this.compression = compression() as ExpressMiddleware
}
// Initialize next/config with the environment configuration
envConfig.setConfig({
serverRuntimeConfig,
publicRuntimeConfig,
})
this.serverBuildDir = join(
this.distDir,
this._isLikeServerless ? SERVERLESS_DIRECTORY : SERVER_DIRECTORY
)
this.pagesManifest = this.getPagesManifest()
this.middlewareManifest = this.getMiddlewareManifest()
this.customRoutes = this.getCustomRoutes()
this.router = new Router(this.generateRoutes())
this.setAssetPrefix(assetPrefix)
this.incrementalCache = new IncrementalCache({
dev,
distDir: this.distDir,
pagesDir: join(
this.distDir,
this._isLikeServerless ? SERVERLESS_DIRECTORY : SERVER_DIRECTORY,
'pages'
),
locales: this.nextConfig.i18n?.locales,
max: this.nextConfig.experimental.isrMemoryCacheSize,
flushToDisk: !minimalMode && this.nextConfig.experimental.isrFlushToDisk,
})
this.responseCache = new ResponseCache(this.incrementalCache)
/**
* This sets environment variable to be used at the time of SSR by head.tsx.
* Using this from process.env allows targeting both serverless and SSR by calling
* `process.env.__NEXT_OPTIMIZE_IMAGES`.
* TODO(atcastle@): Remove this when experimental.optimizeImages are being cleaned up.
*/
if (this.renderOpts.optimizeFonts) {
process.env.__NEXT_OPTIMIZE_FONTS = JSON.stringify(true)
}
if (this.renderOpts.optimizeImages) {
process.env.__NEXT_OPTIMIZE_IMAGES = JSON.stringify(true)
}
if (this.renderOpts.optimizeCss) {
process.env.__NEXT_OPTIMIZE_CSS = JSON.stringify(true)
}
}
public logError(err: Error): void {
if (this.quiet) return
console.error(err)
}
private async handleRequest(
req: IncomingMessage,
res: ServerResponse,
parsedUrl?: NextUrlWithParsedQuery
): Promise<void> {
try {
const urlParts = (req.url || '').split('?')
const urlNoQuery = urlParts[0]
if (urlNoQuery?.match(/(\\|\/\/)/)) {
const cleanUrl = normalizeRepeatedSlashes(req.url!)
res.setHeader('Location', cleanUrl)
res.setHeader('Refresh', `0;url=${cleanUrl}`)
res.statusCode = 308
res.end(cleanUrl)
return
}
setLazyProp({ req: req as any }, 'cookies', getCookieParser(req.headers))
// Parse url if parsedUrl not provided
if (!parsedUrl || typeof parsedUrl !== 'object') {
parsedUrl = parseUrl(req.url!, true)
}
// Parse the querystring ourselves if the user doesn't handle querystring parsing
if (typeof parsedUrl.query === 'string') {
parsedUrl.query = parseQs(parsedUrl.query)
}
// When there are hostname and port we build an absolute URL
const initUrl =
this.hostname && this.port
? `http://${this.hostname}:${this.port}${req.url}`
: req.url
addRequestMeta(req, '__NEXT_INIT_URL', initUrl)
addRequestMeta(req, '__NEXT_INIT_QUERY', { ...parsedUrl.query })
const url = parseNextUrl({
headers: req.headers,
nextConfig: this.nextConfig,
url: req.url?.replace(/^\/+/, '/'),
})
if (url.basePath) {
req.url = replaceBasePath(req.url!, this.nextConfig.basePath)
addRequestMeta(req, '_nextHadBasePath', true)
}
if (
this.minimalMode &&
req.headers['x-matched-path'] &&
typeof req.headers['x-matched-path'] === 'string'
) {
const reqUrlIsDataUrl = req.url?.includes('/_next/data')
const matchedPathIsDataUrl =
req.headers['x-matched-path']?.includes('/_next/data')
const isDataUrl = reqUrlIsDataUrl || matchedPathIsDataUrl
let parsedPath = parseUrl(
isDataUrl ? req.url! : (req.headers['x-matched-path'] as string),
true
)
let matchedPathname = parsedPath.pathname!
let matchedPathnameNoExt = isDataUrl
? matchedPathname.replace(/\.json$/, '')
: matchedPathname
if (this.nextConfig.i18n) {
const localePathResult = normalizeLocalePath(
matchedPathname || '/',
this.nextConfig.i18n.locales
)
if (localePathResult.detectedLocale) {
parsedUrl.query.__nextLocale = localePathResult.detectedLocale
}
}
if (isDataUrl) {
matchedPathname = denormalizePagePath(matchedPathname)
matchedPathnameNoExt = denormalizePagePath(matchedPathnameNoExt)
}
const pageIsDynamic = isDynamicRoute(matchedPathnameNoExt)
const combinedRewrites: Rewrite[] = []
combinedRewrites.push(...this.customRoutes.rewrites.beforeFiles)
combinedRewrites.push(...this.customRoutes.rewrites.afterFiles)
combinedRewrites.push(...this.customRoutes.rewrites.fallback)
const utils = getUtils({
pageIsDynamic,
page: matchedPathnameNoExt,
i18n: this.nextConfig.i18n,
basePath: this.nextConfig.basePath,
rewrites: combinedRewrites,
})
try {
// ensure parsedUrl.pathname includes URL before processing
// rewrites or they won't match correctly
if (this.nextConfig.i18n && !url.locale?.path.detectedLocale) {
parsedUrl.pathname = `/${url.locale?.locale}${parsedUrl.pathname}`
}
utils.handleRewrites(req, parsedUrl)
// interpolate dynamic params and normalize URL if needed
if (pageIsDynamic) {
let params: ParsedUrlQuery | false = {}
Object.assign(parsedUrl.query, parsedPath.query)
const paramsResult = utils.normalizeDynamicRouteParams(
parsedUrl.query
)
if (paramsResult.hasValidParams) {
params = paramsResult.params
} else if (req.headers['x-now-route-matches']) {
const opts: Record<string, string> = {}
params = utils.getParamsFromRouteMatches(
req,
opts,
parsedUrl.query.__nextLocale || ''
)
if (opts.locale) {
parsedUrl.query.__nextLocale = opts.locale
}
} else {
params = utils.dynamicRouteMatcher!(matchedPathnameNoExt)
}
if (params) {
params = utils.normalizeDynamicRouteParams(params).params
matchedPathname = utils.interpolateDynamicPath(
matchedPathname,
params
)
req.url = utils.interpolateDynamicPath(req.url!, params)
}
if (reqUrlIsDataUrl && matchedPathIsDataUrl) {
req.url = formatUrl({
...parsedPath,
pathname: matchedPathname,
})
}
Object.assign(parsedUrl.query, params)
utils.normalizeVercelUrl(req, true)
}
} catch (err) {
if (err instanceof DecodeError) {
res.statusCode = 400
return this.renderError(null, req, res, '/_error', {})
}
throw err
}
parsedUrl.pathname = `${this.nextConfig.basePath || ''}${
matchedPathname === '/' && this.nextConfig.basePath
? ''
: matchedPathname
}`
url.pathname = parsedUrl.pathname
}
addRequestMeta(req, '__nextHadTrailingSlash', url.locale?.trailingSlash)
if (url.locale?.domain) {
addRequestMeta(req, '__nextIsLocaleDomain', true)
}
if (url.locale?.path.detectedLocale) {
req.url = formatUrl(url)
addRequestMeta(req, '__nextStrippedLocale', true)
if (url.pathname === '/api' || url.pathname.startsWith('/api/')) {
return this.render404(req, res, parsedUrl)
}
}
if (!this.minimalMode || !parsedUrl.query.__nextLocale) {
if (url?.locale?.locale) {
parsedUrl.query.__nextLocale = url.locale.locale
}
}
if (url?.locale?.defaultLocale) {
parsedUrl.query.__nextDefaultLocale = url.locale.defaultLocale
}
if (url.locale?.redirect) {
res.setHeader('Location', url.locale.redirect)
res.statusCode = TEMPORARY_REDIRECT_STATUS
res.end()
return
}
res.statusCode = 200
return await this.run(req, res, parsedUrl)
} catch (err: any) {
if (
(err && typeof err === 'object' && err.code === 'ERR_INVALID_URL') ||
err instanceof DecodeError
) {
res.statusCode = 400
return this.renderError(null, req, res, '/_error', {})
}
if (this.minimalMode || this.renderOpts.dev) {
throw err
}
this.logError(isError(err) ? err : new Error(err + ''))
res.statusCode = 500
res.end('Internal Server Error')
}
}
public getRequestHandler(): RequestHandler {
return this.handleRequest.bind(this)
}
public setAssetPrefix(prefix?: string): void {
this.renderOpts.assetPrefix = prefix ? prefix.replace(/\/$/, '') : ''
}
// Backwards compatibility
public async prepare(): Promise<void> {}
// Backwards compatibility
protected async close(): Promise<void> {}
protected setImmutableAssetCacheControl(res: ServerResponse): void {
res.setHeader('Cache-Control', 'public, max-age=31536000, immutable')
}
protected getCustomRoutes(): CustomRoutes {
const customRoutes = require(join(this.distDir, ROUTES_MANIFEST))
let rewrites: CustomRoutes['rewrites']
// rewrites can be stored as an array when an array is
// returned in next.config.js so massage them into
// the expected object format
if (Array.isArray(customRoutes.rewrites)) {
rewrites = {
beforeFiles: [],
afterFiles: customRoutes.rewrites,
fallback: [],
}
} else {
rewrites = customRoutes.rewrites
}
return Object.assign(customRoutes, { rewrites })
}
private _cachedPreviewManifest: PrerenderManifest | undefined
protected getPrerenderManifest(): PrerenderManifest {
if (this._cachedPreviewManifest) {
return this._cachedPreviewManifest
}
const manifest = require(join(this.distDir, PRERENDER_MANIFEST))
return (this._cachedPreviewManifest = manifest)
}
protected getPreviewProps(): __ApiPreviewProps {
return this.getPrerenderManifest().preview
}
protected getMiddlewareManifest(): MiddlewareManifest | undefined {
if (!this.minimalMode) {
const middlewareManifestPath = join(
join(this.distDir, SERVER_DIRECTORY),
MIDDLEWARE_MANIFEST
)
return require(middlewareManifestPath)
}
return undefined
}
protected getMiddleware() {
const middleware = this.middlewareManifest?.middleware || {}
return (
this.middlewareManifest?.sortedMiddleware.map((page) => ({
match: getRouteMatcher(
getMiddlewareRegex(page, MIDDLEWARE_ROUTE.test(middleware[page].name))
),
page,
})) || []
)
}
protected async hasMiddleware(
pathname: string,
_isSSR?: boolean
): Promise<boolean> {
try {
return (
getMiddlewareInfo({
dev: this.renderOpts.dev,
distDir: this.distDir,
page: pathname,
serverless: this._isLikeServerless,
}).paths.length > 0
)
} catch (_) {}
return false
}
protected async ensureMiddleware(_pathname: string, _isSSR?: boolean) {}
private middlewareBetaWarning = execOnce(() => {
Log.warn(
`using beta Middleware (not covered by semver) - https://nextjs.org/docs/messages/beta-middleware`
)
})
protected async runMiddleware(params: {
request: IncomingMessage
response: ServerResponse
parsedUrl: ParsedNextUrl
parsed: UrlWithParsedQuery
onWarning?: (warning: Error) => void
}): Promise<FetchEventResult | null> {
this.middlewareBetaWarning()
// For middleware to "fetch" we must always provide an absolute URL
const url = getRequestMeta(params.request, '__NEXT_INIT_URL')!
if (!url.startsWith('http')) {
throw new Error(
'To use middleware you must provide a `hostname` and `port` to the Next.js Server'
)
}
const page: { name?: string; params?: { [key: string]: string } } = {}
if (await this.hasPage(params.parsedUrl.pathname)) {
page.name = params.parsedUrl.pathname
} else if (this.dynamicRoutes) {
for (const dynamicRoute of this.dynamicRoutes) {
const matchParams = dynamicRoute.match(params.parsedUrl.pathname)
if (matchParams) {
page.name = dynamicRoute.page
page.params = matchParams
break
}
}
}
const allHeaders = new Headers()
let result: FetchEventResult | null = null
for (const middleware of this.middleware || []) {
if (middleware.match(params.parsedUrl.pathname)) {
if (!(await this.hasMiddleware(middleware.page, middleware.ssr))) {
console.warn(`The Edge Function for ${middleware.page} was not found`)
continue
}
await this.ensureMiddleware(middleware.page, middleware.ssr)
const middlewareInfo = getMiddlewareInfo({
dev: this.renderOpts.dev,
distDir: this.distDir,
page: middleware.page,
serverless: this._isLikeServerless,
})
result = await run({
name: middlewareInfo.name,
paths: middlewareInfo.paths,
request: {
headers: params.request.headers,
method: params.request.method || 'GET',
nextConfig: {
basePath: this.nextConfig.basePath,
i18n: this.nextConfig.i18n,
trailingSlash: this.nextConfig.trailingSlash,
},
url: url,
page: page,
},
useCache: !this.nextConfig.experimental.concurrentFeatures,
onWarning: (warning: Error) => {
if (params.onWarning) {
warning.message += ` "./${middlewareInfo.name}"`
params.onWarning(warning)
}
},
})
for (let [key, value] of result.response.headers) {
if (key !== 'x-middleware-next') {
allHeaders.append(key, value)
}
}
if (!this.renderOpts.dev) {
result.waitUntil.catch((error) => {
console.error(`Uncaught: middleware waitUntil errored`, error)
})
}
if (!result.response.headers.has('x-middleware-next')) {
break
}
}
}
if (!result) {
this.render404(params.request, params.response, params.parsed)
} else {
for (let [key, value] of allHeaders) {
result.response.headers.set(key, value)
}
}
return result
}
protected generateRoutes(): {
basePath: string
headers: Route[]
rewrites: {
beforeFiles: Route[]
afterFiles: Route[]
fallback: Route[]
}
fsRoutes: Route[]
redirects: Route[]
catchAllRoute: Route
catchAllMiddleware?: Route
pageChecker: PageChecker
useFileSystemPublicRoutes: boolean
dynamicRoutes: DynamicRoutes | undefined
locales: string[]
} {
const server: Server = this
const publicRoutes = this.generatePublicRoutes()
const staticFilesRoute = this.hasStaticDir
? [
{
// It's very important to keep this route's param optional.
// (but it should support as many params as needed, separated by '/')
// Otherwise this will lead to a pretty simple DOS attack.
// See more: https://github.com/vercel/next.js/issues/2617
match: route('/static/:path*'),
name: 'static catchall',
fn: async (req, res, params, parsedUrl) => {
const p = join(this.dir, 'static', ...params.path)
await this.serveStatic(req, res, p, parsedUrl)
return {
finished: true,
}
},
} as Route,
]
: []
const fsRoutes: Route[] = [
{
match: route('/_next/static/:path*'),
type: 'route',
name: '_next/static catchall',
fn: async (req, res, params, parsedUrl) => {
// make sure to 404 for /_next/static itself
if (!params.path) {
await this.render404(req, res, parsedUrl)
return {
finished: true,
}
}
if (
params.path[0] === CLIENT_STATIC_FILES_RUNTIME ||
params.path[0] === 'chunks' ||
params.path[0] === 'css' ||
params.path[0] === 'image' ||
params.path[0] === 'media' ||
params.path[0] === this.buildId ||
params.path[0] === 'pages' ||
params.path[1] === 'pages'
) {
this.setImmutableAssetCacheControl(res)
}
const p = join(
this.distDir,
CLIENT_STATIC_FILES_PATH,
...(params.path || [])
)
await this.serveStatic(req, res, p, parsedUrl)
return {
finished: true,
}
},
},
{
match: route('/_next/data/:path*'),
type: 'route',
name: '_next/data catchall',
fn: async (req, res, params, _parsedUrl) => {
// Make sure to 404 for /_next/data/ itself and
// we also want to 404 if the buildId isn't correct
if (!params.path || params.path[0] !== this.buildId) {
await this.render404(req, res, _parsedUrl)
return {
finished: true,
}
}
// remove buildId from URL
params.path.shift()
const lastParam = params.path[params.path.length - 1]
// show 404 if it doesn't end with .json
if (typeof lastParam !== 'string' || !lastParam.endsWith('.json')) {
await this.render404(req, res, _parsedUrl)
return {
finished: true,
}
}
// re-create page's pathname
let pathname = `/${params.path.join('/')}`
pathname = getRouteFromAssetPath(pathname, '.json')
if (this.nextConfig.i18n) {
const { host } = req?.headers || {}
// remove port from host and remove port if present
const hostname = host?.split(':')[0].toLowerCase()
const localePathResult = normalizeLocalePath(
pathname,
this.nextConfig.i18n.locales
)
const { defaultLocale } =
detectDomainLocale(this.nextConfig.i18n.domains, hostname) || {}
let detectedLocale = ''
if (localePathResult.detectedLocale) {
pathname = localePathResult.pathname
detectedLocale = localePathResult.detectedLocale
}
_parsedUrl.query.__nextLocale = detectedLocale
_parsedUrl.query.__nextDefaultLocale =
defaultLocale || this.nextConfig.i18n.defaultLocale
if (!detectedLocale) {
_parsedUrl.query.__nextLocale =
_parsedUrl.query.__nextDefaultLocale
await this.render404(req, res, _parsedUrl)
return { finished: true }
}
}
const parsedUrl = parseUrl(pathname, true)
await this.render(
req,
res,
pathname,
{ ..._parsedUrl.query, _nextDataReq: '1' },
parsedUrl
)
return {
finished: true,
}
},
},
{
match: route('/_next/image'),
type: 'route',
name: '_next/image catchall',
fn: (req, res, _params, parsedUrl) => {
if (this.minimalMode) {
res.statusCode = 400
res.end('Bad Request')
return {
finished: true,
}
}
const { imageOptimizer } =
require('./image-optimizer') as typeof import('./image-optimizer')
return imageOptimizer(
server,
req,
res,
parsedUrl,
server.nextConfig,
server.distDir,
this.renderOpts.dev
)
},
},
{
match: route('/_next/:path*'),
type: 'route',
name: '_next catchall',
// This path is needed because `render()` does a check for `/_next` and the calls the routing again
fn: async (req, res, _params, parsedUrl) => {
await this.render404(req, res, parsedUrl)
return {
finished: true,
}
},
},
...publicRoutes,
...staticFilesRoute,
]
const restrictedRedirectPaths = ['/_next'].map((p) =>
this.nextConfig.basePath ? `${this.nextConfig.basePath}${p}` : p
)
const getCustomRoute = (
r: Rewrite | Redirect | Header,
type: RouteType
) => {
const match = getCustomRouteMatcher(
r.source,
!(r as any).internal
? (regex: string) =>
modifyRouteRegex(
regex,
type === 'redirect' ? restrictedRedirectPaths : undefined
)
: undefined
)
return {
...r,
type,
match,
name: type,
fn: async (_req, _res, _params, _parsedUrl) => ({ finished: false }),
} as Route & Rewrite & Header
}
// Headers come very first
const headers = this.minimalMode
? []
: this.customRoutes.headers.map((r) => {
const headerRoute = getCustomRoute(r, 'header')