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import { IncomingMessage, ServerResponse } from 'http'
import { ParsedUrlQuery, stringify as stringifyQuery } from 'querystring'
import React from 'react'
import { createFromReadableStream } from 'next/dist/compiled/react-server-dom-webpack'
import { renderToReadableStream } from 'next/dist/compiled/react-server-dom-webpack/writer.browser.server'
import { StyleRegistry, createStyleRegistry } from 'styled-jsx'
import { UnwrapPromise } from '../lib/coalesced-function'
import {
GSP_NO_RETURNED_VALUE,
GSSP_COMPONENT_MEMBER_ERROR,
GSSP_NO_RETURNED_VALUE,
STATIC_STATUS_PAGE_GET_INITIAL_PROPS_ERROR,
SERVER_PROPS_GET_INIT_PROPS_CONFLICT,
SERVER_PROPS_SSG_CONFLICT,
SSG_GET_INITIAL_PROPS_CONFLICT,
UNSTABLE_REVALIDATE_RENAME_ERROR,
} from '../lib/constants'
import { isSerializableProps } from '../lib/is-serializable-props'
import { GetServerSideProps, GetStaticProps, PreviewData } from '../types'
import { isInAmpMode } from '../shared/lib/amp'
import { AmpStateContext } from '../shared/lib/amp-context'
import {
SERVER_PROPS_ID,
STATIC_PROPS_ID,
STATIC_STATUS_PAGES,
} from '../shared/lib/constants'
import { defaultHead } from '../shared/lib/head'
import { HeadManagerContext } from '../shared/lib/head-manager-context'
import Loadable from '../shared/lib/loadable'
import { LoadableContext } from '../shared/lib/loadable-context'
import { RouterContext } from '../shared/lib/router-context'
import { NextRouter } from '../shared/lib/router/router'
import { isDynamicRoute } from '../shared/lib/router/utils/is-dynamic'
import {
AppType,
ComponentsEnhancer,
DocumentInitialProps,
DocumentProps,
DocumentContext,
HtmlContext,
HtmlProps,
getDisplayName,
isResSent,
loadGetInitialProps,
NextComponentType,
RenderPage,
RenderPageResult,
} from '../shared/lib/utils'
import type { NextApiRequestCookies, __ApiPreviewProps } from './api-utils'
import { denormalizePagePath } from './denormalize-page-path'
import type { FontManifest } from './font-utils'
import type { LoadComponentsReturnType, ManifestItem } from './load-components'
import { normalizePagePath } from './normalize-page-path'
import { getRequestMeta, NextParsedUrlQuery } from './request-meta'
import {
allowedStatusCodes,
getRedirectStatus,
Redirect,
} from '../lib/load-custom-routes'
import { DomainLocale } from './config'
import RenderResult from './render-result'
import isError from '../lib/is-error'
import { readableStreamTee } from './web/utils'
let optimizeAmp: typeof import('./optimize-amp').default
let getFontDefinitionFromManifest: typeof import('./font-utils').getFontDefinitionFromManifest
let tryGetPreviewData: typeof import('./api-utils').tryGetPreviewData
let warn: typeof import('../build/output/log').warn
let postProcess: typeof import('../shared/lib/post-process').default
const DOCTYPE = '<!DOCTYPE html>'
if (!process.browser) {
require('./node-polyfill-web-streams')
optimizeAmp = require('./optimize-amp').default
getFontDefinitionFromManifest =
require('./font-utils').getFontDefinitionFromManifest
tryGetPreviewData = require('./api-utils').tryGetPreviewData
warn = require('../build/output/log').warn
postProcess = require('../shared/lib/post-process').default
} else {
warn = console.warn.bind(console)
}
function noRouter() {
const message =
'No router instance found. you should only use "next/router" inside the client side of your app. https://nextjs.org/docs/messages/no-router-instance'
throw new Error(message)
}
class ServerRouter implements NextRouter {
route: string
pathname: string
query: ParsedUrlQuery
asPath: string
basePath: string
events: any
isFallback: boolean
locale?: string
isReady: boolean
locales?: string[]
defaultLocale?: string
domainLocales?: DomainLocale[]
isPreview: boolean
isLocaleDomain: boolean
constructor(
pathname: string,
query: ParsedUrlQuery,
as: string,
{ isFallback }: { isFallback: boolean },
isReady: boolean,
basePath: string,
locale?: string,
locales?: string[],
defaultLocale?: string,
domainLocales?: DomainLocale[],
isPreview?: boolean,
isLocaleDomain?: boolean
) {
this.route = pathname.replace(/\/$/, '') || '/'
this.pathname = pathname
this.query = query
this.asPath = as
this.isFallback = isFallback
this.basePath = basePath
this.locale = locale
this.locales = locales
this.defaultLocale = defaultLocale
this.isReady = isReady
this.domainLocales = domainLocales
this.isPreview = !!isPreview
this.isLocaleDomain = !!isLocaleDomain
}
push(): any {
noRouter()
}
replace(): any {
noRouter()
}
reload() {
noRouter()
}
back() {
noRouter()
}
prefetch(): any {
noRouter()
}
beforePopState() {
noRouter()
}
}
function enhanceComponents(
options: ComponentsEnhancer,
App: AppType,
Component: NextComponentType
): {
App: AppType
Component: NextComponentType
} {
// For backwards compatibility
if (typeof options === 'function') {
return {
App,
Component: options(Component),
}
}
return {
App: options.enhanceApp ? options.enhanceApp(App) : App,
Component: options.enhanceComponent
? options.enhanceComponent(Component)
: Component,
}
}
function renderFlight(
App: AppType,
Component: React.ComponentType,
props: any
) {
const AppServer = (App as any).__next_rsc__
? (App as React.ComponentType)
: React.Fragment
return (
<AppServer>
<Component {...props} />
</AppServer>
)
}
export type RenderOptsPartial = {
buildId: string
canonicalBase: string
runtimeConfig?: { [key: string]: any }
assetPrefix?: string
err?: Error | null
nextExport?: boolean
dev?: boolean
ampPath?: string
ErrorDebug?: React.ComponentType<{ error: Error }>
ampValidator?: (html: string, pathname: string) => Promise<void>
ampSkipValidation?: boolean
ampOptimizerConfig?: { [key: string]: any }
isDataReq?: boolean
params?: ParsedUrlQuery
previewProps: __ApiPreviewProps
basePath: string
unstable_runtimeJS?: false
unstable_JsPreload?: false
optimizeFonts: boolean
fontManifest?: FontManifest
optimizeImages: boolean
optimizeCss: any
devOnlyCacheBusterQueryString?: string
resolvedUrl?: string
resolvedAsPath?: string
serverComponentManifest?: any
renderServerComponentData?: boolean
serverComponentProps?: any
distDir?: string
locale?: string
locales?: string[]
defaultLocale?: string
domainLocales?: DomainLocale[]
disableOptimizedLoading?: boolean
supportsDynamicHTML?: boolean
runtime?: 'nodejs' | 'edge'
serverComponents?: boolean
customServer?: boolean
crossOrigin?: string
reactRoot: boolean
}
export type RenderOpts = LoadComponentsReturnType & RenderOptsPartial
const invalidKeysMsg = (methodName: string, invalidKeys: string[]) => {
return (
`Additional keys were returned from \`${methodName}\`. Properties intended for your component must be nested under the \`props\` key, e.g.:` +
`\n\n\treturn { props: { title: 'My Title', content: '...' } }` +
`\n\nKeys that need to be moved: ${invalidKeys.join(', ')}.` +
`\nRead more: https://nextjs.org/docs/messages/invalid-getstaticprops-value`
)
}
function checkRedirectValues(
redirect: Redirect,
req: IncomingMessage,
method: 'getStaticProps' | 'getServerSideProps'
) {
const { destination, permanent, statusCode, basePath } = redirect
let errors: string[] = []
const hasStatusCode = typeof statusCode !== 'undefined'
const hasPermanent = typeof permanent !== 'undefined'
if (hasPermanent && hasStatusCode) {
errors.push(`\`permanent\` and \`statusCode\` can not both be provided`)
} else if (hasPermanent && typeof permanent !== 'boolean') {
errors.push(`\`permanent\` must be \`true\` or \`false\``)
} else if (hasStatusCode && !allowedStatusCodes.has(statusCode!)) {
errors.push(
`\`statusCode\` must undefined or one of ${[...allowedStatusCodes].join(
', '
)}`
)
}
const destinationType = typeof destination
if (destinationType !== 'string') {
errors.push(
`\`destination\` should be string but received ${destinationType}`
)
}
const basePathType = typeof basePath
if (basePathType !== 'undefined' && basePathType !== 'boolean') {
errors.push(
`\`basePath\` should be undefined or a false, received ${basePathType}`
)
}
if (errors.length > 0) {
throw new Error(
`Invalid redirect object returned from ${method} for ${req.url}\n` +
errors.join(' and ') +
'\n' +
`See more info here: https://nextjs.org/docs/messages/invalid-redirect-gssp`
)
}
}
const rscCache = new Map()
function createRSCHook() {
const decoder = new TextDecoder()
const encoder = new TextEncoder()
return (
writable: WritableStream,
id: string,
req: ReadableStream,
bootstrap: boolean
) => {
let entry = rscCache.get(id)
if (!entry) {
const [renderStream, forwardStream] = readableStreamTee(req)
entry = createFromReadableStream(renderStream)
rscCache.set(id, entry)
let bootstrapped = false
const forwardReader = forwardStream.getReader()
const writer = writable.getWriter()
function process() {
forwardReader.read().then(({ done, value }) => {
if (bootstrap && !bootstrapped) {
bootstrapped = true
writer.write(
encoder.encode(
`<script>(self.__next_s=self.__next_s||[]).push(${JSON.stringify(
[0, id]
)})</script>`
)
)
}
if (done) {
rscCache.delete(id)
writer.close()
} else {
writer.write(
encoder.encode(
`<script>(self.__next_s=self.__next_s||[]).push(${JSON.stringify(
[1, id, decoder.decode(value)]
)})</script>`
)
)
process()
}
})
}
process()
}
return entry
}
}
const useRSCResponse = createRSCHook()
// Create the wrapper component for a Flight stream.
function createServerComponentRenderer(
App: AppType,
OriginalComponent: React.ComponentType,
{
cachePrefix,
transformStream,
serverComponentManifest,
runtime,
}: {
cachePrefix: string
transformStream: TransformStream
serverComponentManifest: NonNullable<RenderOpts['serverComponentManifest']>
runtime: 'nodejs' | 'edge'
}
) {
if (runtime === 'nodejs') {
// For the nodejs runtime, we need to expose the `__webpack_require__` API
// globally for react-server-dom-webpack.
// This is a hack until we find a better way.
// @ts-ignore
globalThis.__webpack_require__ = OriginalComponent.__webpack_require__
}
const writable = transformStream.writable
const ServerComponentWrapper = (props: any) => {
const id = (React as any).useId()
const reqStream = renderToReadableStream(
renderFlight(App, OriginalComponent, props),
serverComponentManifest
)
const response = useRSCResponse(
writable,
cachePrefix + ',' + id,
reqStream,
true
)
const root = response.readRoot()
rscCache.delete(id)
return root
}
const Component = (props: any) => {
return (
<React.Suspense fallback={null}>
<ServerComponentWrapper {...props} />
</React.Suspense>
)
}
// Although it's not allowed to attach some static methods to Component,
// we still re-assign all the component APIs to keep the behavior unchanged.
for (const methodName of [
'getInitialProps',
'getStaticProps',
'getServerSideProps',
'getStaticPaths',
]) {
const method = (OriginalComponent as any)[methodName]
if (method) {
;(Component as any)[methodName] = method
}
}
return Component
}
export async function renderToHTML(
req: IncomingMessage,
res: ServerResponse,
pathname: string,
query: NextParsedUrlQuery,
renderOpts: RenderOpts
): Promise<RenderResult | null> {
// In dev we invalidate the cache by appending a timestamp to the resource URL.
// This is a workaround to fix https://github.com/vercel/next.js/issues/5860
// TODO: remove this workaround when https://bugs.webkit.org/show_bug.cgi?id=187726 is fixed.
renderOpts.devOnlyCacheBusterQueryString = renderOpts.dev
? renderOpts.devOnlyCacheBusterQueryString || `?ts=${Date.now()}`
: ''
// don't modify original query object
query = Object.assign({}, query)
const {
err,
dev = false,
ampPath = '',
App,
Document,
pageConfig = {},
buildManifest,
fontManifest,
reactLoadableManifest,
ErrorDebug,
getStaticProps,
getStaticPaths,
getServerSideProps,
serverComponentManifest,
serverComponentProps,
isDataReq,
params,
previewProps,
basePath,
devOnlyCacheBusterQueryString,
supportsDynamicHTML,
reactRoot,
runtime,
} = renderOpts
const hasConcurrentFeatures = !!runtime
const isServerComponent = !!serverComponentManifest && hasConcurrentFeatures
const OriginalComponent = renderOpts.Component
let Component: React.ComponentType<{}> | ((props: any) => JSX.Element) =
renderOpts.Component
let serverComponentsInlinedTransformStream: TransformStream<any, any> | null =
null
if (isServerComponent) {
serverComponentsInlinedTransformStream = new TransformStream()
Component = createServerComponentRenderer(App, OriginalComponent, {
cachePrefix: pathname + '?' + stringifyQuery(query),
transformStream: serverComponentsInlinedTransformStream,
serverComponentManifest,
runtime,
})
}
const getFontDefinition = (url: string): string => {
if (fontManifest) {
return getFontDefinitionFromManifest(url, fontManifest)
}
return ''
}
let { renderServerComponentData } = renderOpts
if (isServerComponent && query.__flight__) {
renderServerComponentData = true
delete query.__flight__
}
const callMiddleware = async (method: string, args: any[], props = false) => {
let results: any = props ? {} : []
if ((Document as any)[`${method}Middleware`]) {
let middlewareFunc = await (Document as any)[`${method}Middleware`]
middlewareFunc = middlewareFunc.default || middlewareFunc
const curResults = await middlewareFunc(...args)
if (props) {
for (const result of curResults) {
results = {
...results,
...result,
}
}
} else {
results = curResults
}
}
return results
}
const headTags = (...args: any) => callMiddleware('headTags', args)
const isFallback = !!query.__nextFallback
delete query.__nextFallback
delete query.__nextLocale
delete query.__nextDefaultLocale
const isSSG = !!getStaticProps
const isBuildTimeSSG = isSSG && renderOpts.nextExport
const defaultAppGetInitialProps =
App.getInitialProps === (App as any).origGetInitialProps
const hasPageGetInitialProps = !!(Component as any).getInitialProps
const pageIsDynamic = isDynamicRoute(pathname)
const isAutoExport =
!hasPageGetInitialProps &&
defaultAppGetInitialProps &&
!isSSG &&
!getServerSideProps &&
!hasConcurrentFeatures
for (const methodName of [
'getStaticProps',
'getServerSideProps',
'getStaticPaths',
]) {
if ((Component as any)[methodName]) {
throw new Error(
`page ${pathname} ${methodName} ${GSSP_COMPONENT_MEMBER_ERROR}`
)
}
}
if (hasPageGetInitialProps && isSSG) {
throw new Error(SSG_GET_INITIAL_PROPS_CONFLICT + ` ${pathname}`)
}
if (hasPageGetInitialProps && getServerSideProps) {
throw new Error(SERVER_PROPS_GET_INIT_PROPS_CONFLICT + ` ${pathname}`)
}
if (getServerSideProps && isSSG) {
throw new Error(SERVER_PROPS_SSG_CONFLICT + ` ${pathname}`)
}
if (getStaticPaths && !pageIsDynamic) {
throw new Error(
`getStaticPaths is only allowed for dynamic SSG pages and was found on '${pathname}'.` +
`\nRead more: https://nextjs.org/docs/messages/non-dynamic-getstaticpaths-usage`
)
}
if (!!getStaticPaths && !isSSG) {
throw new Error(
`getStaticPaths was added without a getStaticProps in ${pathname}. Without getStaticProps, getStaticPaths does nothing`
)
}
if (isSSG && pageIsDynamic && !getStaticPaths) {
throw new Error(
`getStaticPaths is required for dynamic SSG pages and is missing for '${pathname}'.` +
`\nRead more: https://nextjs.org/docs/messages/invalid-getstaticpaths-value`
)
}
let asPath: string = renderOpts.resolvedAsPath || (req.url as string)
if (dev) {
const { isValidElementType } = require('next/dist/compiled/react-is')
if (!isValidElementType(Component)) {
throw new Error(
`The default export is not a React Component in page: "${pathname}"`
)
}
if (!isValidElementType(App)) {
throw new Error(
`The default export is not a React Component in page: "/_app"`
)
}
if (!isValidElementType(Document)) {
throw new Error(
`The default export is not a React Component in page: "/_document"`
)
}
if (isAutoExport || isFallback) {
// remove query values except ones that will be set during export
query = {
...(query.amp
? {
amp: query.amp,
}
: {}),
}
asPath = `${pathname}${
// ensure trailing slash is present for non-dynamic auto-export pages
req.url!.endsWith('/') && pathname !== '/' && !pageIsDynamic ? '/' : ''
}`
req.url = pathname
}
if (pathname === '/404' && (hasPageGetInitialProps || getServerSideProps)) {
throw new Error(
`\`pages/404\` ${STATIC_STATUS_PAGE_GET_INITIAL_PROPS_ERROR}`
)
}
if (
STATIC_STATUS_PAGES.includes(pathname) &&
(hasPageGetInitialProps || getServerSideProps)
) {
throw new Error(
`\`pages${pathname}\` ${STATIC_STATUS_PAGE_GET_INITIAL_PROPS_ERROR}`
)
}
}
await Loadable.preloadAll() // Make sure all dynamic imports are loaded
let isPreview
let previewData: PreviewData
if ((isSSG || getServerSideProps) && !isFallback && !process.browser) {
// Reads of this are cached on the `req` object, so this should resolve
// instantly. There's no need to pass this data down from a previous
// invoke, where we'd have to consider server & serverless.
previewData = tryGetPreviewData(req, res, previewProps)
isPreview = previewData !== false
}
// url will always be set
const routerIsReady = !!(
getServerSideProps ||
hasPageGetInitialProps ||
(!defaultAppGetInitialProps && !isSSG)
)
const router = new ServerRouter(
pathname,
query,
asPath,
{
isFallback: isFallback,
},
routerIsReady,
basePath,
renderOpts.locale,
renderOpts.locales,
renderOpts.defaultLocale,
renderOpts.domainLocales,
isPreview,
getRequestMeta(req, '__nextIsLocaleDomain')
)
const jsxStyleRegistry = createStyleRegistry()
const ctx = {
err,
req: isAutoExport ? undefined : req,
res: isAutoExport ? undefined : res,
pathname,
query,
asPath,
locale: renderOpts.locale,
locales: renderOpts.locales,
defaultLocale: renderOpts.defaultLocale,
AppTree: (props: any) => {
return (
<AppContainerWithIsomorphicFiberStructure>
<App {...props} Component={Component} router={router} />
</AppContainerWithIsomorphicFiberStructure>
)
},
defaultGetInitialProps: async (
docCtx: DocumentContext,
options: { nonce?: string } = {}
): Promise<DocumentInitialProps> => {
const enhanceApp = (AppComp: any) => {
return (props: any) => <AppComp {...props} />
}
const { html, head } = await docCtx.renderPage({ enhanceApp })
const styles = jsxStyleRegistry.styles({ nonce: options.nonce })
return { html, head, styles }
},
}
let props: any
const ampState = {
ampFirst: pageConfig.amp === true,
hasQuery: Boolean(query.amp),
hybrid: pageConfig.amp === 'hybrid',
}
// Disable AMP under the web environment
const inAmpMode = !process.browser && isInAmpMode(ampState)
const reactLoadableModules: string[] = []
let head: JSX.Element[] = defaultHead(inAmpMode)
let scriptLoader: any = {}
const nextExport =
!isSSG && (renderOpts.nextExport || (dev && (isAutoExport || isFallback)))
const AppContainer = ({ children }: { children: JSX.Element }) => (
<RouterContext.Provider value={router}>
<AmpStateContext.Provider value={ampState}>
<HeadManagerContext.Provider
value={{
updateHead: (state) => {
head = state
},
updateScripts: (scripts) => {
scriptLoader = scripts
},
scripts: {},
mountedInstances: new Set(),
}}
>
<LoadableContext.Provider
value={(moduleName) => reactLoadableModules.push(moduleName)}
>
<StyleRegistry registry={jsxStyleRegistry}>
{children}
</StyleRegistry>
</LoadableContext.Provider>
</HeadManagerContext.Provider>
</AmpStateContext.Provider>
</RouterContext.Provider>
)
// The `useId` API uses the path indexes to generate an ID for each node.
// To guarantee the match of hydration, we need to ensure that the structure
// of wrapper nodes is isomorphic in server and client.
// TODO: With `enhanceApp` and `enhanceComponents` options, this approach may
// not be useful.
// https://github.com/facebook/react/pull/22644
const Noop = () => null
const AppContainerWithIsomorphicFiberStructure: React.FC<{
children: JSX.Element
}> = ({ children }) => {
return (
<>
{/* <Head/> */}
<Noop />
<AppContainer>
<>
{/* <ReactDevOverlay/> */}
{dev ? (
<>
{children}
<Noop />
</>
) : (
children
)}
{/* <RouteAnnouncer/> */}
<Noop />
</>
</AppContainer>
</>
)
}
props = await loadGetInitialProps(App, {
AppTree: ctx.AppTree,
Component,
router,
ctx,
})
if ((isSSG || getServerSideProps) && isPreview) {
props.__N_PREVIEW = true
}
if (isSSG) {
props[STATIC_PROPS_ID] = true
}
if (isSSG && !isFallback) {
let data: UnwrapPromise<ReturnType<GetStaticProps>>
try {
data = await getStaticProps!({
...(pageIsDynamic ? { params: query as ParsedUrlQuery } : undefined),
...(isPreview
? { preview: true, previewData: previewData }
: undefined),
locales: renderOpts.locales,
locale: renderOpts.locale,
defaultLocale: renderOpts.defaultLocale,
})
} catch (staticPropsError: any) {
// remove not found error code to prevent triggering legacy
// 404 rendering
if (staticPropsError && staticPropsError.code === 'ENOENT') {
delete staticPropsError.code
}
throw staticPropsError
}
if (data == null) {
throw new Error(GSP_NO_RETURNED_VALUE)
}
const invalidKeys = Object.keys(data).filter(
(key) =>
key !== 'revalidate' &&
key !== 'props' &&
key !== 'redirect' &&
key !== 'notFound'
)
if (invalidKeys.includes('unstable_revalidate')) {
throw new Error(UNSTABLE_REVALIDATE_RENAME_ERROR)
}
if (invalidKeys.length) {
throw new Error(invalidKeysMsg('getStaticProps', invalidKeys))
}
if (process.env.NODE_ENV !== 'production') {
if (
typeof (data as any).notFound !== 'undefined' &&
typeof (data as any).redirect !== 'undefined'
) {
throw new Error(
`\`redirect\` and \`notFound\` can not both be returned from ${
isSSG ? 'getStaticProps' : 'getServerSideProps'
} at the same time. Page: ${pathname}\nSee more info here: https://nextjs.org/docs/messages/gssp-mixed-not-found-redirect`
)
}
}
if ('notFound' in data && data.notFound) {
if (pathname === '/404') {
throw new Error(
`The /404 page can not return notFound in "getStaticProps", please remove it to continue!`
)
}
;(renderOpts as any).isNotFound = true
}
if (
'redirect' in data &&
data.redirect &&
typeof data.redirect === 'object'
) {
checkRedirectValues(data.redirect as Redirect, req, 'getStaticProps')
if (isBuildTimeSSG) {
throw new Error(
`\`redirect\` can not be returned from getStaticProps during prerendering (${req.url})\n` +
`See more info here: https://nextjs.org/docs/messages/gsp-redirect-during-prerender`
)
}
;(data as any).props = {
__N_REDIRECT: data.redirect.destination,
__N_REDIRECT_STATUS: getRedirectStatus(data.redirect),
}
if (typeof data.redirect.basePath !== 'undefined') {
;(data as any).props.__N_REDIRECT_BASE_PATH = data.redirect.basePath
}
;(renderOpts as any).isRedirect = true
}
if (
(dev || isBuildTimeSSG) &&
!(renderOpts as any).isNotFound &&
!isSerializableProps(pathname, 'getStaticProps', (data as any).props)
) {
// this fn should throw an error instead of ever returning `false`
throw new Error(
'invariant: getStaticProps did not return valid props. Please report this.'
)
}
if ('revalidate' in data) {
if (typeof data.revalidate === 'number') {
if (!Number.isInteger(data.revalidate)) {
throw new Error(
`A page's revalidate option must be seconds expressed as a natural number for ${req.url}. Mixed numbers, such as '${data.revalidate}', cannot be used.` +
`\nTry changing the value to '${Math.ceil(
data.revalidate
)}' or using \`Math.ceil()\` if you're computing the value.`
)
} else if (data.revalidate <= 0) {
throw new Error(
`A page's revalidate option can not be less than or equal to zero for ${req.url}. A revalidate option of zero means to revalidate after _every_ request, and implies stale data cannot be tolerated.` +
`\n\nTo never revalidate, you can set revalidate to \`false\` (only ran once at build-time).` +
`\nTo revalidate as soon as possible, you can set the value to \`1\`.`
)
} else if (data.revalidate > 31536000) {
// if it's greater than a year for some reason error
console.warn(
`Warning: A page's revalidate option was set to more than a year for ${req.url}. This may have been done in error.` +
`\nTo only run getStaticProps at build-time and not revalidate at runtime, you can set \`revalidate\` to \`false\`!`
)
}
} else if (data.revalidate === true) {
// When enabled, revalidate after 1 second. This value is optimal for
// the most up-to-date page possible, but without a 1-to-1
// request-refresh ratio.
data.revalidate = 1
} else if (
data.revalidate === false ||
typeof data.revalidate === 'undefined'
) {
// By default, we never revalidate.
data.revalidate = false
} else {
throw new Error(
`A page's revalidate option must be seconds expressed as a natural number. Mixed numbers and strings cannot be used. Received '${JSON.stringify(
data.revalidate
)}' for ${req.url}`
)
}
} else {
// By default, we never revalidate.
;(data as any).revalidate = false
}
props.pageProps = Object.assign(
{},
props.pageProps,
'props' in data ? data.props : undefined
)
// pass up revalidate and props for export
// TODO: change this to a different passing mechanism
;(renderOpts as any).revalidate =
'revalidate' in data ? data.revalidate : undefined
;(renderOpts as any).pageData = props
// this must come after revalidate is added to renderOpts
if ((renderOpts as any).isNotFound) {
return null
}
}
if (getServerSideProps) {
props[SERVER_PROPS_ID] = true
}
if (getServerSideProps && !isFallback) {
let data: UnwrapPromise<ReturnType<GetServerSideProps>>
let canAccessRes = true
let resOrProxy = res
let deferredContent = false
if (process.env.NODE_ENV !== 'production') {
resOrProxy = new Proxy<ServerResponse>(res, {
get: function (obj, prop, receiver) {
if (!canAccessRes) {
const message =
`You should not access 'res' after getServerSideProps resolves.` +
`\nRead more: https://nextjs.org/docs/messages/gssp-no-mutating-res`
if (deferredContent) {
throw new Error(message)
} else {
warn(message)
}
}
const value = Reflect.get(obj, prop, receiver)
// since ServerResponse uses internal fields which
// proxy can't map correctly we need to ensure functions
// are bound correctly while being proxied
if (typeof value === 'function') {
return value.bind(obj)
}
return value
},
})
}
try {
data = await getServerSideProps({