Download next.js/packages/next/src/export/routes/app-page.ts from Devendra174/react-code-dataset: direct link, hf CLI and curl.
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| import type { OutgoingHttpHeaders } from 'node:http' | |
| import type { ExportRouteResult } from '../types' | |
| import type { RenderOpts } from '../../server/app-render/types' | |
| import type { NextParsedUrlQuery } from '../../server/request-meta' | |
| import type { RouteMetadata } from './types' | |
| import type { | |
| MockedRequest, | |
| MockedResponse, | |
| } from '../../server/lib/mock-request' | |
| import { isDynamicUsageError } from '../helpers/is-dynamic-usage-error' | |
| import { | |
| NEXT_CACHE_TAGS_HEADER, | |
| NEXT_META_SUFFIX, | |
| RSC_PREFETCH_SUFFIX, | |
| RSC_SUFFIX, | |
| RSC_SEGMENTS_DIR_SUFFIX, | |
| RSC_SEGMENT_SUFFIX, | |
| } from '../../lib/constants' | |
| import { hasNextSupport } from '../../server/ci-info' | |
| import { lazyRenderAppPage } from '../../server/route-modules/app-page/module.render' | |
| import { isBailoutToCSRError } from '../../shared/lib/lazy-dynamic/bailout-to-csr' | |
| import { NodeNextRequest, NodeNextResponse } from '../../server/base-http/node' | |
| import { NEXT_IS_PRERENDER_HEADER } from '../../client/components/app-router-headers' | |
| import type { FetchMetrics } from '../../server/base-http' | |
| import type { WorkStore } from '../../server/app-render/work-async-storage.external' | |
| import type { FallbackRouteParams } from '../../server/request/fallback-params' | |
| import { AfterRunner } from '../../server/after/run-with-after' | |
| import type { RequestLifecycleOpts } from '../../server/base-server' | |
| import type { AppSharedContext } from '../../server/app-render/app-render' | |
| import type { MultiFileWriter } from '../../lib/multi-file-writer' | |
| import { stringifyResumeDataCache } from '../../server/resume-data-cache/resume-data-cache' | |
| /** | |
| * Renders & exports a page associated with the /app directory | |
| */ | |
| export async function exportAppPage( | |
| req: MockedRequest, | |
| res: MockedResponse, | |
| page: string, | |
| path: string, | |
| pathname: string, | |
| query: NextParsedUrlQuery, | |
| fallbackRouteParams: FallbackRouteParams | null, | |
| partialRenderOpts: Omit<RenderOpts, keyof RequestLifecycleOpts>, | |
| htmlFilepath: string, | |
| debugOutput: boolean, | |
| isDynamicError: boolean, | |
| fileWriter: MultiFileWriter, | |
| sharedContext: AppSharedContext | |
| ): Promise<ExportRouteResult> { | |
| const afterRunner = new AfterRunner() | |
| const renderOpts: RenderOpts = { | |
| ...partialRenderOpts, | |
| waitUntil: afterRunner.context.waitUntil, | |
| onClose: afterRunner.context.onClose, | |
| onAfterTaskError: afterRunner.context.onTaskError, | |
| } | |
| let isDefaultNotFound = false | |
| // If the page is `/_not-found`, then we should update the page to be `/404`. | |
| // UNDERSCORE_NOT_FOUND_ROUTE value used here, however we don't want to import it here as it causes constants to be inlined which we don't want here. | |
| if (page === '/_not-found/page') { | |
| isDefaultNotFound = true | |
| pathname = '/404' | |
| } | |
| try { | |
| const result = await lazyRenderAppPage( | |
| new NodeNextRequest(req), | |
| new NodeNextResponse(res), | |
| pathname, | |
| query, | |
| fallbackRouteParams, | |
| renderOpts, | |
| undefined, | |
| false, | |
| sharedContext | |
| ) | |
| const html = result.toUnchunkedString() | |
| // TODO(after): if we abort a prerender because of an error in an after-callback | |
| // we should probably communicate that better (and not log the error twice) | |
| await afterRunner.executeAfter() | |
| const { metadata } = result | |
| const { | |
| flightData, | |
| cacheControl = { revalidate: false, expire: undefined }, | |
| postponed, | |
| fetchTags, | |
| fetchMetrics, | |
| segmentData, | |
| renderResumeDataCache, | |
| } = metadata | |
| // Ensure we don't postpone without having PPR enabled. | |
| if (postponed && !renderOpts.experimental.isRoutePPREnabled) { | |
| throw new Error('Invariant: page postponed without PPR being enabled') | |
| } | |
| if (cacheControl.revalidate === 0) { | |
| if (isDynamicError) { | |
| throw new Error( | |
| `Page with dynamic = "error" encountered dynamic data method on ${path}.` | |
| ) | |
| } | |
| const { staticBailoutInfo = {} } = metadata | |
| if (debugOutput && staticBailoutInfo?.description) { | |
| logDynamicUsageWarning({ | |
| path, | |
| description: staticBailoutInfo.description, | |
| stack: staticBailoutInfo.stack, | |
| }) | |
| } | |
| return { cacheControl, fetchMetrics } | |
| } | |
| // If page data isn't available, it means that the page couldn't be rendered | |
| // properly so long as we don't have unknown route params. When a route doesn't | |
| // have unknown route params, there will not be any flight data. | |
| if ( | |
| !flightData && | |
| (!fallbackRouteParams || fallbackRouteParams.size === 0) | |
| ) { | |
| throw new Error(`Invariant: failed to get page data for ${path}`) | |
| } | |
| if (flightData) { | |
| // If PPR is enabled, we want to emit a prefetch rsc file for the page | |
| // instead of the standard rsc. This is because the standard rsc will | |
| // contain the dynamic data. We do this if any routes have PPR enabled so | |
| // that the cache read/write is the same. | |
| if (renderOpts.experimental.isRoutePPREnabled) { | |
| // If PPR is enabled, we should emit the flight data as the prefetch | |
| // payload. | |
| // TODO: This will eventually be replaced by the per-segment prefetch | |
| // output below. | |
| fileWriter.append( | |
| htmlFilepath.replace(/\.html$/, RSC_PREFETCH_SUFFIX), | |
| flightData | |
| ) | |
| } else { | |
| // Writing the RSC payload to a file if we don't have PPR enabled. | |
| fileWriter.append( | |
| htmlFilepath.replace(/\.html$/, RSC_SUFFIX), | |
| flightData | |
| ) | |
| } | |
| } | |
| let segmentPaths | |
| if (segmentData) { | |
| // Emit the per-segment prefetch data. We emit them as separate files | |
| // so that the cache handler has the option to treat each as a | |
| // separate entry. | |
| segmentPaths = [] | |
| const segmentsDir = htmlFilepath.replace( | |
| /\.html$/, | |
| RSC_SEGMENTS_DIR_SUFFIX | |
| ) | |
| for (const [segmentPath, buffer] of segmentData) { | |
| segmentPaths.push(segmentPath) | |
| const segmentDataFilePath = | |
| segmentsDir + segmentPath + RSC_SEGMENT_SUFFIX | |
| fileWriter.append(segmentDataFilePath, buffer) | |
| } | |
| } | |
| const headers: OutgoingHttpHeaders = { ...metadata.headers } | |
| // If we're writing the file to disk, we know it's a prerender. | |
| headers[NEXT_IS_PRERENDER_HEADER] = '1' | |
| if (fetchTags) { | |
| headers[NEXT_CACHE_TAGS_HEADER] = fetchTags | |
| } | |
| // Writing static HTML to a file. | |
| fileWriter.append(htmlFilepath, html) | |
| const isParallelRoute = /\/@\w+/.test(page) | |
| const isNonSuccessfulStatusCode = res.statusCode > 300 | |
| // When PPR is enabled, we don't always send 200 for routes that have been | |
| // pregenerated, so we should grab the status code from the mocked | |
| // response. | |
| let status: number | undefined = renderOpts.experimental.isRoutePPREnabled | |
| ? res.statusCode | |
| : undefined | |
| if (isDefaultNotFound) { | |
| // Override the default /_not-found page status code to 404 | |
| status = 404 | |
| } else if (isNonSuccessfulStatusCode && !isParallelRoute) { | |
| // If it's parallel route the status from mock response is 404 | |
| status = res.statusCode | |
| } | |
| // Writing the request metadata to a file. | |
| const meta: RouteMetadata = { | |
| status, | |
| headers, | |
| postponed, | |
| segmentPaths, | |
| } | |
| fileWriter.append( | |
| htmlFilepath.replace(/\.html$/, NEXT_META_SUFFIX), | |
| JSON.stringify(meta, null, 2) | |
| ) | |
| return { | |
| // Filter the metadata if the environment does not have next support. | |
| metadata: hasNextSupport | |
| ? meta | |
| : { | |
| segmentPaths: meta.segmentPaths, | |
| }, | |
| hasEmptyStaticShell: Boolean(postponed) && html === '', | |
| hasPostponed: Boolean(postponed), | |
| cacheControl, | |
| fetchMetrics, | |
| renderResumeDataCache: renderResumeDataCache | |
| ? await stringifyResumeDataCache(renderResumeDataCache) | |
| : undefined, | |
| } | |
| } catch (err) { | |
| if (!isDynamicUsageError(err)) { | |
| throw err | |
| } | |
| // We should fail rendering if a client side rendering bailout | |
| // occurred at the page level. | |
| if (isBailoutToCSRError(err)) { | |
| throw err | |
| } | |
| let fetchMetrics: FetchMetrics | undefined | |
| if (debugOutput) { | |
| const store = (renderOpts as any).store as WorkStore | |
| const { dynamicUsageDescription, dynamicUsageStack } = store | |
| fetchMetrics = store.fetchMetrics | |
| logDynamicUsageWarning({ | |
| path, | |
| description: dynamicUsageDescription ?? '', | |
| stack: dynamicUsageStack, | |
| }) | |
| } | |
| return { cacheControl: { revalidate: 0, expire: undefined }, fetchMetrics } | |
| } | |
| } | |
| function logDynamicUsageWarning({ | |
| path, | |
| description, | |
| stack, | |
| }: { | |
| path: string | |
| description: string | |
| stack?: string | |
| }) { | |
| const errMessage = new Error( | |
| `Static generation failed due to dynamic usage on ${path}, reason: ${description}` | |
| ) | |
| if (stack) { | |
| errMessage.stack = errMessage.message + stack.substring(stack.indexOf('\n')) | |
| } | |
| console.warn(errMessage) | |
| } | |