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next-server.ts
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next-server.ts
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import compression from 'next/dist/compiled/compression'
import fs from 'fs'
import chalk from 'chalk'
import { IncomingMessage, ServerResponse } from 'http'
import Proxy from 'next/dist/compiled/http-proxy'
import { join, relative, resolve, sep } from 'path'
import {
parse as parseQs,
stringify as stringifyQs,
ParsedUrlQuery,
} from 'querystring'
import { format as formatUrl, parse as parseUrl, UrlWithParsedQuery } from 'url'
import { PrerenderManifest } from '../../build'
import {
getRedirectStatus,
Header,
Redirect,
Rewrite,
RouteType,
CustomRoutes,
} from '../../lib/load-custom-routes'
import { withCoalescedInvoke } from '../../lib/coalesced-function'
import {
BUILD_ID_FILE,
CLIENT_PUBLIC_FILES_PATH,
CLIENT_STATIC_FILES_PATH,
CLIENT_STATIC_FILES_RUNTIME,
PAGES_MANIFEST,
PERMANENT_REDIRECT_STATUS,
PRERENDER_MANIFEST,
ROUTES_MANIFEST,
SERVERLESS_DIRECTORY,
SERVER_DIRECTORY,
STATIC_STATUS_PAGES,
TEMPORARY_REDIRECT_STATUS,
} from '../lib/constants'
import {
getRouteMatcher,
getRouteRegex,
getSortedRoutes,
isDynamicRoute,
} from '../lib/router/utils'
import * as envConfig from '../lib/runtime-config'
import { isResSent, NextApiRequest, NextApiResponse } from '../lib/utils'
import {
apiResolver,
setLazyProp,
getCookieParser,
tryGetPreviewData,
__ApiPreviewProps,
} from './api-utils'
import { DomainLocales, isTargetLikeServerless, NextConfig } from './config'
import pathMatch from '../lib/router/utils/path-match'
import { recursiveReadDirSync } from './lib/recursive-readdir-sync'
import {
loadComponents,
LoadComponentsReturnType,
loadDefaultErrorComponents,
} from './load-components'
import { normalizePagePath } from './normalize-page-path'
import { RenderOpts, RenderOptsPartial, renderToHTML } from './render'
import { getPagePath, requireFontManifest } from './require'
import Router, {
DynamicRoutes,
PageChecker,
Params,
route,
Route,
} from './router'
import prepareDestination, {
compileNonPath,
} from '../lib/router/utils/prepare-destination'
import { sendPayload, setRevalidateHeaders } from './send-payload'
import { serveStatic } from './serve-static'
import { IncrementalCache } from './incremental-cache'
import { execOnce } from '../lib/utils'
import { isBlockedPage } from './utils'
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 '../lib/router/utils/get-route-from-asset-path'
import { FontManifest } from './font-utils'
import { denormalizePagePath } from './denormalize-page-path'
import accept from '@hapi/accept'
import { normalizeLocalePath } from '../lib/i18n/normalize-locale-path'
import { detectLocaleCookie } from '../lib/i18n/detect-locale-cookie'
import * as Log from '../../build/output/log'
import { imageOptimizer } from './image-optimizer'
import { detectDomainLocale } from '../lib/i18n/detect-domain-locale'
import cookie from 'next/dist/compiled/cookie'
import escapePathDelimiters from '../lib/router/utils/escape-path-delimiters'
import { getUtils } from '../../build/webpack/loaders/next-serverless-loader/utils'
import { PreviewData } from 'next/types'
import HotReloader from '../../server/hot-reloader'
const getCustomRouteMatcher = pathMatch(true)
type Middleware = (
req: IncomingMessage,
res: ServerResponse,
next: (err?: Error) => void
) => void
type FindComponentsResult = {
components: LoadComponentsReturnType
query: ParsedUrlQuery
}
type DynamicRouteItem = {
page: string
match: ReturnType<typeof getRouteMatcher>
}
export type ServerConstructor = {
/**
* Where the Next project is located - @default '.'
*/
dir?: string
/**
* Hide error messages containing server information - @default false
*/
quiet?: boolean
/**
* Object what you would use in next.config.js - @default {}
*/
conf?: NextConfig | null
dev?: boolean
customServer?: boolean
}
export default class Server {
protected dir: string
protected quiet: boolean
protected nextConfig: NextConfig
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?: DomainLocales
distDir: string
}
private compression?: Middleware
private incrementalCache: IncrementalCache
protected router: Router
protected dynamicRoutes?: DynamicRoutes
protected customRoutes: CustomRoutes
public constructor({
dir = '.',
quiet = false,
conf,
dev = false,
minimalMode = false,
customServer = true,
}: ServerConstructor & { conf: NextConfig; minimalMode?: boolean }) {
this.dir = resolve(dir)
this.quiet = quiet
loadEnvConfig(this.dir, dev, Log)
this.nextConfig = conf
this.distDir = join(this.dir, this.nextConfig.distDir)
this.publicDir = join(this.dir, CLIENT_PUBLIC_FILES_PATH)
this.hasStaticDir = !minimalMode && fs.existsSync(join(this.dir, 'static'))
// 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.readBuildId()
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,
}
// 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 Middleware
}
// Initialize next/config with the environment configuration
envConfig.setConfig({
serverRuntimeConfig,
publicRuntimeConfig,
})
this.serverBuildDir = join(
this.distDir,
this._isLikeServerless ? SERVERLESS_DIRECTORY : SERVER_DIRECTORY
)
const pagesManifestPath = join(this.serverBuildDir, PAGES_MANIFEST)
if (!dev) {
this.pagesManifest = require(pagesManifestPath)
}
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,
flushToDisk: !minimalMode && this.nextConfig.experimental.sprFlushToDisk,
})
/**
* 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?: UrlWithParsedQuery
): Promise<void> {
setLazyProp({ req: req as any }, 'cookies', getCookieParser(req))
// Parse url if parsedUrl not provided
if (!parsedUrl || typeof parsedUrl !== 'object') {
const url: any = req.url
parsedUrl = parseUrl(url, true)
}
const { basePath, i18n } = this.nextConfig
// Parse the querystring ourselves if the user doesn't handle querystring parsing
if (typeof parsedUrl.query === 'string') {
parsedUrl.query = parseQs(parsedUrl.query)
}
;(req as any).__NEXT_INIT_QUERY = Object.assign({}, parsedUrl.query)
if (basePath && req.url?.startsWith(basePath)) {
// store original URL to allow checking if basePath was
// provided or not
;(req as any)._nextHadBasePath = true
req.url = req.url!.replace(basePath, '') || '/'
}
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
)
const { pathname, query } = parsedPath
let matchedPathname = pathname as string
let matchedPathnameNoExt = isDataUrl
? matchedPathname.replace(/\.json$/, '')
: matchedPathname
if (i18n) {
const localePathResult = normalizeLocalePath(
matchedPathname || '/',
i18n.locales
)
if (localePathResult.detectedLocale) {
parsedUrl.query.__nextLocale = localePathResult.detectedLocale
}
}
if (isDataUrl) {
matchedPathname = denormalizePagePath(matchedPathname)
matchedPathnameNoExt = denormalizePagePath(matchedPathnameNoExt)
}
const pageIsDynamic = isDynamicRoute(matchedPathnameNoExt)
const combinedRewrites: Rewrite[] = []
combinedRewrites.push(...this.customRoutes.rewrites.beforeFiles)
combinedRewrites.push(...this.customRoutes.rewrites.afterFiles)
combinedRewrites.push(...this.customRoutes.rewrites.fallback)
const utils = getUtils({
pageIsDynamic,
page: matchedPathnameNoExt,
i18n: this.nextConfig.i18n,
basePath: this.nextConfig.basePath,
rewrites: combinedRewrites,
})
utils.handleRewrites(req, parsedUrl)
// interpolate dynamic params and normalize URL if needed
if (pageIsDynamic) {
let params: ParsedUrlQuery | false = {}
Object.assign(parsedUrl.query, query)
const paramsResult = utils.normalizeDynamicRouteParams(parsedUrl.query)
if (paramsResult.hasValidParams) {
params = paramsResult.params
} else if (req.headers['x-now-route-matches']) {
const opts: Record<string, string> = {}
params = utils.getParamsFromRouteMatches(
req,
opts,
(parsedUrl.query.__nextLocale as string | undefined) || ''
)
if (opts.locale) {
parsedUrl.query.__nextLocale = opts.locale
}
} else {
params = utils.dynamicRouteMatcher!(matchedPathnameNoExt)
}
if (params) {
params = utils.normalizeDynamicRouteParams(params).params
matchedPathname = utils.interpolateDynamicPath(
matchedPathname,
params
)
req.url = utils.interpolateDynamicPath(req.url!, params)
}
if (reqUrlIsDataUrl && matchedPathIsDataUrl) {
req.url = formatUrl({
...parsedPath,
pathname: matchedPathname,
})
}
Object.assign(parsedUrl.query, params)
utils.normalizeVercelUrl(req, true)
}
parsedUrl.pathname = `${basePath || ''}${
matchedPathname === '/' && basePath ? '' : matchedPathname
}`
}
if (i18n) {
// get pathname from URL with basePath stripped for locale detection
let { pathname, ...parsed } = parseUrl(req.url || '/')
pathname = pathname || '/'
let defaultLocale = i18n.defaultLocale
let detectedLocale = detectLocaleCookie(req, i18n.locales)
let acceptPreferredLocale =
i18n.localeDetection !== false
? accept.language(req.headers['accept-language'], i18n.locales)
: detectedLocale
const { host } = req?.headers || {}
// remove port from host if present
const hostname = host?.split(':')[0].toLowerCase()
const detectedDomain = detectDomainLocale(i18n.domains, hostname)
if (detectedDomain) {
defaultLocale = detectedDomain.defaultLocale
detectedLocale = defaultLocale
;(req as any).__nextIsLocaleDomain = true
}
// if not domain specific locale use accept-language preferred
detectedLocale = detectedLocale || acceptPreferredLocale
let localeDomainRedirect: string | undefined
;(req as any).__nextHadTrailingSlash = pathname!.endsWith('/')
if (pathname === '/') {
;(req as any).__nextHadTrailingSlash = this.nextConfig.trailingSlash
}
const localePathResult = normalizeLocalePath(pathname!, i18n.locales)
if (localePathResult.detectedLocale) {
detectedLocale = localePathResult.detectedLocale
req.url = formatUrl({
...parsed,
pathname: localePathResult.pathname,
})
;(req as any).__nextStrippedLocale = true
}
// If a detected locale is a domain specific locale and we aren't already
// on that domain and path prefix redirect to it to prevent duplicate
// content from multiple domains
if (detectedDomain && pathname === '/') {
const localeToCheck = acceptPreferredLocale
// const localeToCheck = localePathResult.detectedLocale
// ? detectedLocale
// : acceptPreferredLocale
const matchedDomain = detectDomainLocale(
i18n.domains,
undefined,
localeToCheck
)
if (
matchedDomain &&
(matchedDomain.domain !== detectedDomain.domain ||
localeToCheck !== matchedDomain.defaultLocale)
) {
localeDomainRedirect = `http${matchedDomain.http ? '' : 's'}://${
matchedDomain.domain
}/${
localeToCheck === matchedDomain.defaultLocale ? '' : localeToCheck
}`
}
}
const denormalizedPagePath = denormalizePagePath(pathname || '/')
const detectedDefaultLocale =
!detectedLocale ||
detectedLocale.toLowerCase() === defaultLocale.toLowerCase()
const shouldStripDefaultLocale = false
// detectedDefaultLocale &&
// denormalizedPagePath.toLowerCase() ===
// `/${i18n.defaultLocale.toLowerCase()}`
const shouldAddLocalePrefix =
!detectedDefaultLocale && denormalizedPagePath === '/'
detectedLocale = detectedLocale || i18n.defaultLocale
if (
i18n.localeDetection !== false &&
(localeDomainRedirect ||
shouldAddLocalePrefix ||
shouldStripDefaultLocale)
) {
// set the NEXT_LOCALE cookie when a user visits the default locale
// with the locale prefix so that they aren't redirected back to
// their accept-language preferred locale
if (
shouldStripDefaultLocale &&
acceptPreferredLocale !== defaultLocale
) {
const previous = res.getHeader('set-cookie')
res.setHeader('set-cookie', [
...(typeof previous === 'string'
? [previous]
: Array.isArray(previous)
? previous
: []),
cookie.serialize('NEXT_LOCALE', defaultLocale, {
httpOnly: true,
path: '/',
}),
])
}
res.setHeader(
'Location',
localeDomainRedirect
? localeDomainRedirect
: formatUrl({
// make sure to include any query values when redirecting
...parsed,
pathname: shouldStripDefaultLocale
? basePath || `/`
: `${basePath || ''}/${detectedLocale}`,
})
)
res.statusCode = TEMPORARY_REDIRECT_STATUS
res.end()
return
}
parsedUrl.query.__nextDefaultLocale =
detectedDomain?.defaultLocale || i18n.defaultLocale
if (!this.minimalMode || !parsedUrl.query.__nextLocale) {
parsedUrl.query.__nextLocale =
localePathResult.detectedLocale ||
detectedDomain?.defaultLocale ||
defaultLocale
}
}
res.statusCode = 200
try {
return await this.run(req, res, parsedUrl)
} catch (err) {
if (this.minimalMode) {
throw err
}
this.logError(err)
res.statusCode = 500
res.end('Internal Server Error')
}
}
public getRequestHandler() {
return this.handleRequest.bind(this)
}
public setAssetPrefix(prefix?: string): void {
this.renderOpts.assetPrefix = prefix ? prefix.replace(/\/$/, '') : ''
}
// 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 generateRoutes(): {
basePath: string
headers: Route[]
rewrites: {
beforeFiles: Route[]
afterFiles: Route[]
fallback: Route[]
}
fsRoutes: Route[]
redirects: Route[]
catchAllRoute: Route
pageChecker: PageChecker
useFileSystemPublicRoutes: boolean
dynamicRoutes: DynamicRoutes | undefined
locales: string[]
} {
const server: Server = this
const publicRoutes = fs.existsSync(this.publicDir)
? 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] === '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()
// show 404 if it doesn't end with .json
if (!params.path[params.path.length - 1].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')
const { i18n } = this.nextConfig
if (i18n) {
const { host } = req?.headers || {}
// remove port from host and remove port if present
const hostname = host?.split(':')[0].toLowerCase()
const localePathResult = normalizeLocalePath(pathname, i18n.locales)
const { defaultLocale } =
detectDomainLocale(i18n.domains, hostname) || {}
let detectedLocale = ''
if (localePathResult.detectedLocale) {
pathname = localePathResult.pathname
detectedLocale = localePathResult.detectedLocale
}
_parsedUrl.query.__nextLocale = detectedLocale!
_parsedUrl.query.__nextDefaultLocale =
defaultLocale || 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) =>
imageOptimizer(
server,
req,
res,
parsedUrl,
server.nextConfig,
server.distDir
),
},
{
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 getCustomRoute = (
r: Rewrite | Redirect | Header,
type: RouteType
) => {
const match = getCustomRouteMatcher(r.source)
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')
return {
match: headerRoute.match,
has: headerRoute.has,
type: headerRoute.type,
name: `${headerRoute.type} ${headerRoute.source} header route`,
fn: async (_req, res, params, _parsedUrl) => {
const hasParams = Object.keys(params).length > 0
for (const header of (headerRoute as Header).headers) {
let { key, value } = header
if (hasParams) {
key = compileNonPath(key, params)
value = compileNonPath(value, params)
}
res.setHeader(key, value)
}
return { finished: false }
},
} as Route
})
// since initial query values are decoded by querystring.parse
// we need to re-encode them here but still allow passing through
// values from rewrites/redirects
const stringifyQuery = (req: IncomingMessage, query: ParsedUrlQuery) => {
const initialQueryValues = Object.values((req as any).__NEXT_INIT_QUERY)
return stringifyQs(query, undefined, undefined, {
encodeURIComponent(value) {
if (initialQueryValues.some((val) => val === value)) {
return encodeURIComponent(value)
}
return value
},
})
}
const redirects = this.minimalMode
? []
: this.customRoutes.redirects.map((redirect) => {
const redirectRoute = getCustomRoute(redirect, 'redirect')
return {
internal: redirectRoute.internal,
type: redirectRoute.type,
match: redirectRoute.match,
has: redirectRoute.has,
statusCode: redirectRoute.statusCode,
name: `Redirect route ${redirectRoute.source}`,
fn: async (req, res, params, parsedUrl) => {
const { parsedDestination } = prepareDestination(
redirectRoute.destination,
params,
parsedUrl.query,
false
)
const { query } = parsedDestination
delete (parsedDestination as any).query
parsedDestination.search = stringifyQuery(req, query)
const updatedDestination = formatUrl(parsedDestination)
res.setHeader('Location', updatedDestination)
res.statusCode = getRedirectStatus(redirectRoute as Redirect)
// Since IE11 doesn't support the 308 header add backwards
// compatibility using refresh header
if (res.statusCode === 308) {
res.setHeader('Refresh', `0;url=${updatedDestination}`)
}
res.end()
return {
finished: true,
}
},
} as Route
})
const buildRewrite = (rewrite: Rewrite, check = true) => {
const rewriteRoute = getCustomRoute(rewrite, 'rewrite')
return {
...rewriteRoute,
check,
type: rewriteRoute.type,
name: `Rewrite route ${rewriteRoute.source}`,
match: rewriteRoute.match,
fn: async (req, res, params, parsedUrl) => {
const { newUrl, parsedDestination } = prepareDestination(
rewriteRoute.destination,
params,
parsedUrl.query,
true
)
// external rewrite, proxy it
if (parsedDestination.protocol) {
const { query } = parsedDestination
delete (parsedDestination as any).query
parsedDestination.search = stringifyQuery(req, query)
const target = formatUrl(parsedDestination)
const proxy = new Proxy({
target,
changeOrigin: true,
ignorePath: true,
proxyTimeout: 30_000, // limit proxying to 30 seconds
})
await new Promise((proxyResolve, proxyReject) => {
let finished = false
proxy.on('proxyReq', (proxyReq) => {
proxyReq.on('close', () => {
if (!finished) {
finished = true
proxyResolve(true)
}
})
})
proxy.on('error', (err) => {
if (!finished) {
finished = true
proxyReject(err)
}
})
proxy.web(req, res)
})
return {
finished: true,
}
}
;(req as any)._nextRewroteUrl = newUrl
;(req as any)._nextDidRewrite =
(req as any)._nextRewroteUrl !== req.url
return {
finished: false,
pathname: newUrl,
query: parsedDestination.query,
}
},
} as Route
}
let beforeFiles: Route[] = []
let afterFiles: Route[] = []
let fallback: Route[] = []
if (!this.minimalMode) {
if (Array.isArray(this.customRoutes.rewrites)) {
afterFiles = this.customRoutes.rewrites.map((r) => buildRewrite(r))
} else {
beforeFiles = this.customRoutes.rewrites.beforeFiles.map((r) =>
buildRewrite(r, false)
)
afterFiles = this.customRoutes.rewrites.afterFiles.map((r) =>
buildRewrite(r)
)
fallback = this.customRoutes.rewrites.fallback.map((r) =>
buildRewrite(r)
)
}
}
const catchAllRoute: Route = {
match: route('/:path*'),
type: 'route',
name: 'Catchall render',
fn: async (req, res, _params, parsedUrl) => {
let { pathname, query } = parsedUrl
if (!pathname) {
throw new Error('pathname is undefined')
}