forked from vercel/next.js
/
base-server.ts
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/
base-server.ts
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import type { __ApiPreviewProps } from './api-utils'
import type { CustomRoutes } from '../lib/load-custom-routes'
import type { DomainLocale } from './config'
import type { DynamicRoutes, PageChecker, Route } from './router'
import type { FontManifest, FontConfig } from './font-utils'
import type { LoadComponentsReturnType } from './load-components'
import type { RouteMatch } from '../shared/lib/router/utils/route-matcher'
import type { MiddlewareRouteMatch } from '../shared/lib/router/utils/middleware-route-matcher'
import type { Params } from '../shared/lib/router/utils/route-matcher'
import type { NextConfig, NextConfigComplete } from './config-shared'
import type { NextParsedUrlQuery, NextUrlWithParsedQuery } from './request-meta'
import type { ParsedUrlQuery } from 'querystring'
import type { RenderOpts, RenderOptsPartial } from './render'
import type {
ResponseCacheBase,
ResponseCacheEntry,
ResponseCacheValue,
} from './response-cache'
import type { UrlWithParsedQuery } from 'url'
import {
NormalizeError,
DecodeError,
normalizeRepeatedSlashes,
MissingStaticPage,
} from '../shared/lib/utils'
import type { PreviewData, ServerRuntime } from 'next/types'
import type { PagesManifest } from '../build/webpack/plugins/pages-manifest-plugin'
import type { BaseNextRequest, BaseNextResponse } from './base-http'
import type { PayloadOptions } from './send-payload'
import type { PrerenderManifest } from '../build'
import { parse as parseQs } from 'querystring'
import { format as formatUrl, parse as parseUrl } from 'url'
import { getRedirectStatus } from '../lib/redirect-status'
import {
NEXT_BUILTIN_DOCUMENT,
STATIC_STATUS_PAGES,
TEMPORARY_REDIRECT_STATUS,
} from '../shared/lib/constants'
import { getSortedRoutes, isDynamicRoute } from '../shared/lib/router/utils'
import {
setLazyProp,
getCookieParser,
checkIsManualRevalidate,
} from './api-utils'
import * as envConfig from '../shared/lib/runtime-config'
import Router from './router'
import { setRevalidateHeaders } from './send-payload/revalidate-headers'
import { execOnce } from '../shared/lib/utils'
import { isBlockedPage } from './utils'
import { isBot } from '../shared/lib/router/utils/is-bot'
import RenderResult from './render-result'
import { removeTrailingSlash } from '../shared/lib/router/utils/remove-trailing-slash'
import { denormalizePagePath } from '../shared/lib/page-path/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 isError, { getProperError } from '../lib/is-error'
import { addRequestMeta, getRequestMeta } from './request-meta'
import { ImageConfigComplete } from '../shared/lib/image-config'
import { removePathPrefix } from '../shared/lib/router/utils/remove-path-prefix'
import { normalizeAppPath } from '../shared/lib/router/utils/app-paths'
import { getRouteMatcher } from '../shared/lib/router/utils/route-matcher'
import { getRouteRegex } from '../shared/lib/router/utils/route-regex'
import { getLocaleRedirect } from '../shared/lib/i18n/get-locale-redirect'
import { getHostname } from '../shared/lib/get-hostname'
import { parseUrl as parseUrlUtil } from '../shared/lib/router/utils/parse-url'
import { getNextPathnameInfo } from '../shared/lib/router/utils/get-next-pathname-info'
import { MiddlewareMatcher } from '../build/analysis/get-page-static-info'
export type FindComponentsResult = {
components: LoadComponentsReturnType
query: NextParsedUrlQuery
}
export interface RoutingItem {
page: string
match: RouteMatch
re?: RegExp
}
export interface MiddlewareRoutingItem {
page: string
match: MiddlewareRouteMatch
matchers?: MiddlewareMatcher[]
}
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
/**
* The HTTP Server that Next.js is running behind
*/
httpServer?: import('http').Server
}
export interface BaseRequestHandler {
(
req: BaseNextRequest,
res: BaseNextResponse,
parsedUrl?: NextUrlWithParsedQuery | undefined
): Promise<void>
}
export type RequestContext = {
req: BaseNextRequest
res: BaseNextResponse
pathname: string
query: NextParsedUrlQuery
renderOpts: RenderOptsPartial
}
export class NoFallbackError extends Error {}
// Internal wrapper around build errors at development
// time, to prevent us from propagating or logging them
export class WrappedBuildError extends Error {
innerError: Error
constructor(innerError: Error) {
super()
this.innerError = innerError
}
}
type ResponsePayload = {
type: 'html' | 'json'
body: RenderResult
revalidateOptions?: any
}
export function prepareServerlessUrl(
req: BaseNextRequest,
query: ParsedUrlQuery
): void {
const curUrl = parseUrl(req.url!, true)
req.url = formatUrl({
...curUrl,
search: undefined,
query: {
...curUrl.query,
...query,
},
})
}
export default abstract class Server<ServerOptions extends Options = Options> {
protected dir: string
protected quiet: boolean
protected nextConfig: NextConfigComplete
protected distDir: string
protected publicDir: string
protected hasStaticDir: boolean
protected pagesManifest?: PagesManifest
protected appPathsManifest?: 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: FontConfig
images: ImageConfigComplete
fontManifest?: FontManifest
disableOptimizedLoading?: boolean
optimizeCss: any
nextScriptWorkers: any
locale?: string
locales?: string[]
defaultLocale?: string
domainLocales?: DomainLocale[]
distDir: string
runtime?: ServerRuntime
serverComponents?: boolean
crossOrigin?: string
supportsDynamicHTML?: boolean
serverComponentManifest?: any
serverCSSManifest?: any
renderServerComponentData?: boolean
serverComponentProps?: any
largePageDataBytes?: number
}
protected serverOptions: ServerOptions
private responseCache: ResponseCacheBase
protected router: Router
protected dynamicRoutes?: DynamicRoutes
protected appPathRoutes?: Record<string, string[]>
protected customRoutes: CustomRoutes
protected serverComponentManifest?: any
protected serverCSSManifest?: any
public readonly hostname?: string
public readonly port?: number
protected abstract getPublicDir(): string
protected abstract getHasStaticDir(): boolean
protected abstract getPagesManifest(): PagesManifest | undefined
protected abstract getAppPathsManifest(): PagesManifest | undefined
protected abstract getBuildId(): string
protected abstract getFilesystemPaths(): Set<string>
protected abstract findPageComponents(params: {
pathname: string
query: NextParsedUrlQuery
params: Params
isAppPath: boolean
appPaths?: string[] | null
sriEnabled?: boolean
}): Promise<FindComponentsResult | null>
protected abstract getFontManifest(): FontManifest | undefined
protected abstract getPrerenderManifest(): PrerenderManifest
protected abstract getServerComponentManifest(): any
protected abstract getServerCSSManifest(): any
protected abstract attachRequestMeta(
req: BaseNextRequest,
parsedUrl: NextUrlWithParsedQuery
): void
protected abstract getFallback(page: string): Promise<string>
protected abstract getCustomRoutes(): CustomRoutes
protected abstract hasPage(pathname: string): Promise<boolean>
protected abstract generateRoutes(): {
headers: Route[]
rewrites: {
beforeFiles: Route[]
afterFiles: Route[]
fallback: Route[]
}
fsRoutes: Route[]
redirects: Route[]
catchAllRoute: Route
catchAllMiddleware: Route[]
pageChecker: PageChecker
useFileSystemPublicRoutes: boolean
dynamicRoutes: DynamicRoutes | undefined
nextConfig: NextConfig
}
protected abstract sendRenderResult(
req: BaseNextRequest,
res: BaseNextResponse,
options: {
result: RenderResult
type: 'html' | 'json'
generateEtags: boolean
poweredByHeader: boolean
options?: PayloadOptions
}
): Promise<void>
protected abstract runApi(
req: BaseNextRequest,
res: BaseNextResponse,
query: ParsedUrlQuery,
params: Params | undefined,
page: string,
builtPagePath: string
): Promise<boolean>
protected abstract renderHTML(
req: BaseNextRequest,
res: BaseNextResponse,
pathname: string,
query: NextParsedUrlQuery,
renderOpts: RenderOpts
): Promise<RenderResult | null>
protected abstract handleCompression(
req: BaseNextRequest,
res: BaseNextResponse
): void
protected abstract getResponseCache(options: {
dev: boolean
}): ResponseCacheBase
protected abstract loadEnvConfig(params: {
dev: boolean
forceReload?: boolean
}): void
public constructor(options: ServerOptions) {
const {
dir = '.',
quiet = false,
conf,
dev = false,
minimalMode = false,
customServer = true,
hostname,
port,
} = options
this.serverOptions = options
this.dir =
process.env.NEXT_RUNTIME === 'edge' ? dir : require('path').resolve(dir)
this.quiet = quiet
this.loadEnvConfig({ dev })
// 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 =
process.env.NEXT_RUNTIME === 'edge'
? this.nextConfig.distDir
: require('path').join(this.dir, this.nextConfig.distDir)
this.publicDir = this.getPublicDir()
this.hasStaticDir = !minimalMode && this.getHasStaticDir()
// Only serverRuntimeConfig needs the default
// publicRuntimeConfig gets it's default in client/index.js
const {
serverRuntimeConfig = {},
publicRuntimeConfig,
assetPrefix,
generateEtags,
} = this.nextConfig
this.buildId = this.getBuildId()
this.minimalMode = minimalMode || !!process.env.NEXT_PRIVATE_MINIMAL_MODE
const serverComponents = this.nextConfig.experimental.serverComponents
this.serverComponentManifest = serverComponents
? this.getServerComponentManifest()
: undefined
this.serverCSSManifest = serverComponents
? this.getServerCSSManifest()
: undefined
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: this.nextConfig.images,
optimizeFonts: this.nextConfig.optimizeFonts,
fontManifest:
this.nextConfig.optimizeFonts &&
this.nextConfig.optimizeFonts.inlineFonts &&
!dev
? this.getFontManifest()
: undefined,
optimizeCss: this.nextConfig.experimental.optimizeCss,
nextScriptWorkers: this.nextConfig.experimental.nextScriptWorkers,
disableOptimizedLoading: this.nextConfig.experimental.runtime
? true
: this.nextConfig.experimental.disableOptimizedLoading,
domainLocales: this.nextConfig.i18n?.domains,
distDir: this.distDir,
runtime: this.nextConfig.experimental.runtime,
serverComponents,
crossOrigin: this.nextConfig.crossOrigin
? this.nextConfig.crossOrigin
: undefined,
largePageDataBytes: this.nextConfig.experimental.largePageDataBytes,
}
// 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
}
// Initialize next/config with the environment configuration
envConfig.setConfig({
serverRuntimeConfig,
publicRuntimeConfig,
})
this.pagesManifest = this.getPagesManifest()
this.appPathsManifest = this.getAppPathsManifest()
this.customRoutes = this.getCustomRoutes()
this.router = new Router(this.generateRoutes())
this.setAssetPrefix(assetPrefix)
this.responseCache = this.getResponseCache({ dev })
}
public logError(err: Error): void {
if (this.quiet) return
console.error(err)
}
private async handleRequest(
req: BaseNextRequest,
res: BaseNextResponse,
parsedUrl?: NextUrlWithParsedQuery
): Promise<void> {
try {
const urlParts = (req.url || '').split('?')
const urlNoQuery = urlParts[0]
// this normalizes repeated slashes in the path e.g. hello//world ->
// hello/world or backslashes to forward slashes, this does not
// handle trailing slash as that is handled the same as a next.config.js
// redirect
if (urlNoQuery?.match(/(\\|\/\/)/)) {
const cleanUrl = normalizeRepeatedSlashes(req.url!)
res.redirect(cleanUrl, 308).body(cleanUrl).send()
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)
}
this.attachRequestMeta(req, parsedUrl)
const domainLocale = detectDomainLocale(
this.nextConfig.i18n?.domains,
getHostname(parsedUrl, req.headers)
)
const defaultLocale =
domainLocale?.defaultLocale || this.nextConfig.i18n?.defaultLocale
const url = parseUrlUtil(req.url.replace(/^\/+/, '/'))
const pathnameInfo = getNextPathnameInfo(url.pathname, {
nextConfig: this.nextConfig,
})
url.pathname = pathnameInfo.pathname
if (pathnameInfo.basePath) {
req.url = removePathPrefix(req.url!, this.nextConfig.basePath)
addRequestMeta(req, '_nextHadBasePath', true)
}
if (
this.minimalMode &&
typeof req.headers['x-matched-path'] === 'string'
) {
try {
// x-matched-path is the source of truth, it tells what page
// should be rendered because we don't process rewrites in minimalMode
let matchedPath = new URL(
req.headers['x-matched-path'],
'http://localhost'
).pathname
let urlPathname = new URL(req.url, 'http://localhost').pathname
// For ISR the URL is normalized to the prerenderPath so if
// it's a data request the URL path will be the data URL,
// basePath is already stripped by this point
if (urlPathname.startsWith(`/_next/data/`)) {
parsedUrl.query.__nextDataReq = '1'
}
const normalizedUrlPath = this.stripNextDataPath(urlPathname)
matchedPath = this.stripNextDataPath(matchedPath, false)
if (this.nextConfig.i18n) {
const localeResult = normalizeLocalePath(
matchedPath,
this.nextConfig.i18n.locales
)
matchedPath = localeResult.pathname
if (localeResult.detectedLocale) {
parsedUrl.query.__nextLocale = localeResult.detectedLocale
}
}
matchedPath = denormalizePagePath(matchedPath)
let srcPathname = matchedPath
if (
!isDynamicRoute(srcPathname) &&
!(await this.hasPage(removeTrailingSlash(srcPathname)))
) {
for (const dynamicRoute of this.dynamicRoutes || []) {
if (dynamicRoute.match(srcPathname)) {
srcPathname = dynamicRoute.page
break
}
}
}
const pageIsDynamic = isDynamicRoute(srcPathname)
const utils = getUtils({
pageIsDynamic,
page: srcPathname,
i18n: this.nextConfig.i18n,
basePath: this.nextConfig.basePath,
rewrites: this.customRoutes.rewrites,
})
// ensure parsedUrl.pathname includes URL before processing
// rewrites or they won't match correctly
if (defaultLocale && !pathnameInfo.locale) {
parsedUrl.pathname = `/${defaultLocale}${parsedUrl.pathname}`
}
const pathnameBeforeRewrite = parsedUrl.pathname
const rewriteParams = utils.handleRewrites(req, parsedUrl)
const rewriteParamKeys = Object.keys(rewriteParams)
const didRewrite = pathnameBeforeRewrite !== parsedUrl.pathname
if (didRewrite) {
addRequestMeta(req, '_nextRewroteUrl', parsedUrl.pathname!)
addRequestMeta(req, '_nextDidRewrite', true)
}
// interpolate dynamic params and normalize URL if needed
if (pageIsDynamic) {
let params: ParsedUrlQuery | false = {}
let paramsResult = utils.normalizeDynamicRouteParams(
parsedUrl.query
)
// for prerendered ISR paths we attempt parsing the route
// params from the URL directly as route-matches may not
// contain the correct values due to the filesystem path
// matching before the dynamic route has been matched
if (
!paramsResult.hasValidParams &&
pageIsDynamic &&
!isDynamicRoute(normalizedUrlPath)
) {
let matcherParams = utils.dynamicRouteMatcher?.(normalizedUrlPath)
if (matcherParams) {
utils.normalizeDynamicRouteParams(matcherParams)
Object.assign(paramsResult.params, matcherParams)
paramsResult.hasValidParams = true
}
}
if (paramsResult.hasValidParams) {
params = paramsResult.params
}
if (
req.headers['x-now-route-matches'] &&
isDynamicRoute(matchedPath) &&
!paramsResult.hasValidParams
) {
const opts: Record<string, string> = {}
const routeParams = utils.getParamsFromRouteMatches(
req,
opts,
parsedUrl.query.__nextLocale || ''
)
if (opts.locale) {
parsedUrl.query.__nextLocale = opts.locale
}
paramsResult = utils.normalizeDynamicRouteParams(
routeParams,
true
)
if (paramsResult.hasValidParams) {
params = paramsResult.params
}
}
// handle the actual dynamic route name being requested
if (
pageIsDynamic &&
utils.defaultRouteMatches &&
normalizedUrlPath === srcPathname &&
!paramsResult.hasValidParams &&
!utils.normalizeDynamicRouteParams({ ...params }, true)
.hasValidParams
) {
params = utils.defaultRouteMatches
}
if (params) {
matchedPath = utils.interpolateDynamicPath(srcPathname, params)
req.url = utils.interpolateDynamicPath(req.url!, params)
}
Object.assign(parsedUrl.query, params)
}
if (pageIsDynamic || didRewrite) {
utils.normalizeVercelUrl(req, true, [
...rewriteParamKeys,
...Object.keys(utils.defaultRouteRegex?.groups || {}),
])
}
parsedUrl.pathname = `${this.nextConfig.basePath || ''}${
matchedPath === '/' && this.nextConfig.basePath ? '' : matchedPath
}`
url.pathname = parsedUrl.pathname
} catch (err) {
if (err instanceof DecodeError || err instanceof NormalizeError) {
res.statusCode = 400
return this.renderError(null, req, res, '/_error', {})
}
throw err
}
}
addRequestMeta(req, '__nextHadTrailingSlash', pathnameInfo.trailingSlash)
addRequestMeta(req, '__nextIsLocaleDomain', Boolean(domainLocale))
parsedUrl.query.__nextDefaultLocale = defaultLocale
if (pathnameInfo.locale) {
req.url = formatUrl(url)
addRequestMeta(req, '__nextStrippedLocale', true)
}
if (!this.minimalMode || !parsedUrl.query.__nextLocale) {
if (pathnameInfo.locale || defaultLocale) {
parsedUrl.query.__nextLocale = pathnameInfo.locale || defaultLocale
}
}
if (!this.minimalMode && defaultLocale) {
const redirect = getLocaleRedirect({
defaultLocale,
domainLocale,
headers: req.headers,
nextConfig: this.nextConfig,
pathLocale: pathnameInfo.locale,
urlParsed: {
...url,
pathname: pathnameInfo.locale
? `/${pathnameInfo.locale}${url.pathname}`
: url.pathname,
},
})
if (redirect) {
return res
.redirect(redirect, TEMPORARY_REDIRECT_STATUS)
.body(redirect)
.send()
}
}
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 ||
err instanceof NormalizeError
) {
res.statusCode = 400
return this.renderError(null, req, res, '/_error', {})
}
if (this.minimalMode || this.renderOpts.dev) {
throw err
}
this.logError(getProperError(err))
res.statusCode = 500
res.body('Internal Server Error').send()
}
}
public getRequestHandler(): BaseRequestHandler {
return this.handleRequest.bind(this)
}
protected async handleUpgrade(
_req: BaseNextRequest,
_socket: any,
_head?: any
): Promise<void> {}
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 getPreviewProps(): __ApiPreviewProps {
return this.getPrerenderManifest().preview
}
protected async _beforeCatchAllRender(
_req: BaseNextRequest,
_res: BaseNextResponse,
_params: Params,
_parsedUrl: UrlWithParsedQuery
): Promise<boolean> {
return false
}
protected getDynamicRoutes(): Array<RoutingItem> {
const addedPages = new Set<string>()
return getSortedRoutes(
[
...Object.keys(this.appPathRoutes || {}),
...Object.keys(this.pagesManifest!),
].map(
(page) =>
normalizeLocalePath(page, this.nextConfig.i18n?.locales).pathname
)
)
.map((page) => {
if (addedPages.has(page) || !isDynamicRoute(page)) return null
addedPages.add(page)
return {
page,
match: getRouteMatcher(getRouteRegex(page)),
}
})
.filter((item): item is RoutingItem => Boolean(item))
}
protected getAppPathRoutes(): Record<string, string[]> {
const appPathRoutes: Record<string, string[]> = {}
Object.keys(this.appPathsManifest || {}).forEach((entry) => {
const normalizedPath = normalizeAppPath(entry) || '/'
if (!appPathRoutes[normalizedPath]) {
appPathRoutes[normalizedPath] = []
}
appPathRoutes[normalizedPath].push(entry)
})
return appPathRoutes
}
protected async run(
req: BaseNextRequest,
res: BaseNextResponse,
parsedUrl: UrlWithParsedQuery
): Promise<void> {
this.handleCompression(req, res)
try {
const matched = await this.router.execute(req, res, parsedUrl)
if (matched) {
return
}
} catch (err) {
if (err instanceof DecodeError || err instanceof NormalizeError) {
res.statusCode = 400
return this.renderError(null, req, res, '/_error', {})
}
throw err
}
await this.render404(req, res, parsedUrl)
}
private async pipe(
fn: (ctx: RequestContext) => Promise<ResponsePayload | null>,
partialContext: {
req: BaseNextRequest
res: BaseNextResponse
pathname: string
query: NextParsedUrlQuery
}
): Promise<void> {
const isBotRequest = isBot(partialContext.req.headers['user-agent'] || '')
const ctx = {
...partialContext,
renderOpts: {
...this.renderOpts,
supportsDynamicHTML: !isBotRequest,
},
} as const
const payload = await fn(ctx)
if (payload === null) {
return
}
const { req, res } = ctx
const { body, type, revalidateOptions } = payload
if (!res.sent) {
const { generateEtags, poweredByHeader, dev } = this.renderOpts
if (dev) {
// In dev, we should not cache pages for any reason.
res.setHeader('Cache-Control', 'no-store, must-revalidate')
}
return this.sendRenderResult(req, res, {
result: body,
type,
generateEtags,
poweredByHeader,
options: revalidateOptions,
})
}
}
private async getStaticHTML(
fn: (ctx: RequestContext) => Promise<ResponsePayload | null>,
partialContext: {
req: BaseNextRequest
res: BaseNextResponse
pathname: string
query: ParsedUrlQuery
}
): Promise<string | null> {
const payload = await fn({
...partialContext,
renderOpts: {
...this.renderOpts,
supportsDynamicHTML: false,
},
})
if (payload === null) {
return null
}
return payload.body.toUnchunkedString()
}
public async render(
req: BaseNextRequest,
res: BaseNextResponse,
pathname: string,
query: NextParsedUrlQuery = {},
parsedUrl?: NextUrlWithParsedQuery,
internalRender = false
): Promise<void> {
if (!pathname.startsWith('/')) {
console.warn(
`Cannot render page with path "${pathname}", did you mean "/${pathname}"?. See more info here: https://nextjs.org/docs/messages/render-no-starting-slash`
)
}
if (
this.renderOpts.customServer &&
pathname === '/index' &&
!(await this.hasPage('/index'))
) {
// maintain backwards compatibility for custom server
// (see custom-server integration tests)
pathname = '/'
}
// we allow custom servers to call render for all URLs
// so check if we need to serve a static _next file or not.
// we don't modify the URL for _next/data request but still
// call render so we special case this to prevent an infinite loop
if (
!internalRender &&
!this.minimalMode &&
!query.__nextDataReq &&
(req.url?.match(/^\/_next\//) ||
(this.hasStaticDir && req.url!.match(/^\/static\//)))
) {
return this.handleRequest(req, res, parsedUrl)
}
// Custom server users can run `app.render()` which needs compression.
if (this.renderOpts.customServer) {
this.handleCompression(req, res)
}
if (isBlockedPage(pathname)) {
return this.render404(req, res, parsedUrl)
}
return this.pipe((ctx) => this.renderToResponse(ctx), {
req,
res,
pathname,
query,
})
}
protected async getStaticPaths(pathname: string): Promise<{
staticPaths: string[] | undefined
fallbackMode: 'static' | 'blocking' | false
}> {
// `staticPaths` is intentionally set to `undefined` as it should've
// been caught when checking disk data.
const staticPaths = undefined
// Read whether or not fallback should exist from the manifest.
const fallbackField =
this.getPrerenderManifest().dynamicRoutes[pathname].fallback
return {
staticPaths,
fallbackMode:
typeof fallbackField === 'string'
? 'static'
: fallbackField === null
? 'blocking'
: false,
}
}
private async renderToResponseWithComponents(
{ req, res, pathname, renderOpts: opts }: RequestContext,
{ components, query }: FindComponentsResult
): Promise<ResponsePayload | null> {
const is404Page = pathname === '/404'
const is500Page = pathname === '/500'
const isLikeServerless =
typeof components.ComponentMod === 'object' &&
typeof (components.ComponentMod as any).renderReqToHTML === 'function'
const hasServerProps = !!components.getServerSideProps
const hasStaticPaths = !!components.getStaticPaths
const hasGetInitialProps = !!components.Component?.getInitialProps
const isServerComponent = !!components.ComponentMod?.__next_rsc__
const isSSG =
!!components.getStaticProps ||
// For static server component pages, we currently always consider them
// as SSG since we also need to handle the next data (flight JSON).
(isServerComponent &&
!hasServerProps &&
!hasGetInitialProps &&
process.env.NEXT_RUNTIME !== 'edge')
// Toggle whether or not this is a Data request
const isDataReq =
!!(
query.__nextDataReq ||
(req.headers['x-nextjs-data'] &&
(this.serverOptions as any).webServerConfig)
) &&
(isSSG || hasServerProps || isServerComponent)
delete query.__nextDataReq
// normalize req.url for SSG paths as it is not exposed
// to getStaticProps and the asPath should not expose /_next/data
if (
isSSG &&
this.minimalMode &&
req.headers['x-matched-path'] &&
req.url.startsWith('/_next/data')
) {
req.url = this.stripNextDataPath(req.url)
}
if (
!isServerComponent &&
!!req.headers['x-nextjs-data'] &&
(!res.statusCode || res.statusCode === 200)
) {
res.setHeader(
'x-nextjs-matched-path',
`${query.__nextLocale ? `/${query.__nextLocale}` : ''}${pathname}`
)
}
// Don't delete query.__flight__ yet, it still needs to be used in renderToHTML later
const isFlightRequest = Boolean(
this.serverComponentManifest && query.__flight__
)