291 lines
8.6 KiB
JavaScript
291 lines
8.6 KiB
JavaScript
import url from 'url'
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import { extname, join, dirname, sep } from 'path'
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import { renderToHTML } from '../next-server/server/render'
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import { promises } from 'fs'
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import AmpHtmlValidator from 'next/dist/compiled/amphtml-validator'
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import { loadComponents } from '../next-server/server/load-components'
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import { isDynamicRoute } from '../next-server/lib/router/utils/is-dynamic'
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import { getRouteMatcher } from '../next-server/lib/router/utils/route-matcher'
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import { getRouteRegex } from '../next-server/lib/router/utils/route-regex'
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import { normalizePagePath } from '../next-server/server/normalize-page-path'
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import { SERVER_PROPS_EXPORT_ERROR } from '../lib/constants'
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import fetch from 'next/dist/compiled/node-fetch'
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// @ts-ignore fetch exists globally
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if (!global.fetch) {
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// Polyfill fetch() in the Node.js environment
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// @ts-ignore fetch exists globally
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global.fetch = fetch
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}
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const envConfig = require('../next-server/lib/runtime-config')
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global.__NEXT_DATA__ = {
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nextExport: true,
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}
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export default async function({
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path,
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pathMap,
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distDir,
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buildId,
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outDir,
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pagesDataDir,
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renderOpts,
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buildExport,
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serverRuntimeConfig,
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subFolders,
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serverless,
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}) {
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let results = {
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ampValidations: [],
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}
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try {
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const { query: originalQuery = {} } = pathMap
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const { page } = pathMap
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const filePath = normalizePagePath(path)
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const ampPath = `${filePath}.amp`
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let query = { ...originalQuery }
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let params
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// We need to show a warning if they try to provide query values
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// for an auto-exported page since they won't be available
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const hasOrigQueryValues = Object.keys(originalQuery).length > 0
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const queryWithAutoExportWarn = () => {
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if (hasOrigQueryValues) {
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throw new Error(
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`\nError: you provided query values for ${path} which is an auto-exported page. These can not be applied since the page can no longer be re-rendered on the server. To disable auto-export for this page add \`getInitialProps\`\n`
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)
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}
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}
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// Check if the page is a specified dynamic route
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if (isDynamicRoute(page) && page !== path) {
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params = getRouteMatcher(getRouteRegex(page))(path)
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if (params) {
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// we have to pass these separately for serverless
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if (!serverless) {
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query = {
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...query,
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...params,
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}
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}
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} else {
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throw new Error(
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`The provided export path '${path}' doesn't match the '${page}' page.\nRead more: https://err.sh/zeit/next.js/export-path-mismatch`
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)
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}
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}
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const headerMocks = {
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headers: {},
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getHeader: () => ({}),
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setHeader: () => {},
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hasHeader: () => false,
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removeHeader: () => {},
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getHeaderNames: () => [],
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}
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const req = {
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url: path,
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...headerMocks,
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}
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const res = {
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...headerMocks,
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}
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envConfig.setConfig({
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serverRuntimeConfig,
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publicRuntimeConfig: renderOpts.runtimeConfig,
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})
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let htmlFilename = `${filePath}${sep}index.html`
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if (!subFolders) htmlFilename = `${filePath}.html`
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const pageExt = extname(page)
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const pathExt = extname(path)
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// Make sure page isn't a folder with a dot in the name e.g. `v1.2`
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if (pageExt !== pathExt && pathExt !== '') {
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// If the path has an extension, use that as the filename instead
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htmlFilename = path
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} else if (path === '/') {
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// If the path is the root, just use index.html
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htmlFilename = 'index.html'
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}
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const baseDir = join(outDir, dirname(htmlFilename))
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let htmlFilepath = join(outDir, htmlFilename)
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await promises.mkdir(baseDir, { recursive: true })
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let html
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let curRenderOpts = {}
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let renderMethod = renderToHTML
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const renderedDuringBuild = getStaticProps => {
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return !buildExport && getStaticProps && !isDynamicRoute(path)
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}
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if (serverless) {
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const curUrl = url.parse(req.url, true)
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req.url = url.format({
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...curUrl,
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query: {
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...curUrl.query,
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...query,
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},
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})
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const { Component: mod, getServerSideProps } = await loadComponents(
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distDir,
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buildId,
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page,
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serverless
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)
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if (getServerSideProps) {
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throw new Error(`Error for page ${page}: ${SERVER_PROPS_EXPORT_ERROR}`)
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}
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// if it was auto-exported the HTML is loaded here
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if (typeof mod === 'string') {
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html = mod
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queryWithAutoExportWarn()
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} else {
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// for non-dynamic SSG pages we should have already
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// prerendered the file
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if (renderedDuringBuild(mod.getStaticProps)) return results
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if (mod.getStaticProps && !htmlFilepath.endsWith('.html')) {
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// make sure it ends with .html if the name contains a dot
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htmlFilename += '.html'
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htmlFilepath += '.html'
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}
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renderMethod = mod.renderReqToHTML
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const result = await renderMethod(
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req,
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res,
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'export',
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{ ampPath },
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params
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)
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curRenderOpts = result.renderOpts || {}
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html = result.html
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}
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if (!html) {
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throw new Error(`Failed to render serverless page`)
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}
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} else {
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const components = await loadComponents(
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distDir,
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buildId,
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page,
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serverless
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)
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if (components.getServerSideProps) {
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throw new Error(`Error for page ${page}: ${SERVER_PROPS_EXPORT_ERROR}`)
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}
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// for non-dynamic SSG pages we should have already
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// prerendered the file
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if (renderedDuringBuild(components.getStaticProps)) {
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return results
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}
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// TODO: de-dupe the logic here between serverless and server mode
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if (components.getStaticProps && !htmlFilepath.endsWith('.html')) {
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// make sure it ends with .html if the name contains a dot
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htmlFilepath += '.html'
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htmlFilename += '.html'
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}
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if (typeof components.Component === 'string') {
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html = components.Component
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queryWithAutoExportWarn()
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} else {
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curRenderOpts = { ...components, ...renderOpts, ampPath, params }
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html = await renderMethod(req, res, page, query, curRenderOpts)
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}
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}
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const validateAmp = async (html, page, validatorPath) => {
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const validator = await AmpHtmlValidator.getInstance(validatorPath)
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const result = validator.validateString(html)
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const errors = result.errors.filter(e => e.severity === 'ERROR')
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const warnings = result.errors.filter(e => e.severity !== 'ERROR')
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if (warnings.length || errors.length) {
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results.ampValidations.push({
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page,
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result: {
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errors,
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warnings,
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},
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})
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}
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}
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if (curRenderOpts.inAmpMode && !curRenderOpts.ampSkipValidation) {
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await validateAmp(html, path, curRenderOpts.ampValidatorPath)
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} else if (curRenderOpts.hybridAmp) {
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// we need to render the AMP version
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let ampHtmlFilename = `${ampPath}${sep}index.html`
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if (!subFolders) {
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ampHtmlFilename = `${ampPath}.html`
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}
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const ampBaseDir = join(outDir, dirname(ampHtmlFilename))
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const ampHtmlFilepath = join(outDir, ampHtmlFilename)
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try {
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await promises.access(ampHtmlFilepath)
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} catch (_) {
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// make sure it doesn't exist from manual mapping
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let ampHtml
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if (serverless) {
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req.url += (req.url.includes('?') ? '&' : '?') + 'amp=1'
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ampHtml = (await renderMethod(req, res, 'export')).html
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} else {
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ampHtml = await renderMethod(
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req,
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res,
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page,
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{ ...query, amp: 1 },
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curRenderOpts
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)
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}
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if (!curRenderOpts.ampSkipValidation) {
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await validateAmp(ampHtml, page + '?amp=1')
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}
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await promises.mkdir(ampBaseDir, { recursive: true })
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await promises.writeFile(ampHtmlFilepath, ampHtml, 'utf8')
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}
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}
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if (curRenderOpts.pageData) {
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const dataFile = join(
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pagesDataDir,
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htmlFilename.replace(/\.html$/, '.json')
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)
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await promises.mkdir(dirname(dataFile), { recursive: true })
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await promises.writeFile(
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dataFile,
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JSON.stringify(curRenderOpts.pageData),
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'utf8'
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)
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}
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results.fromBuildExportRevalidate = curRenderOpts.revalidate
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await promises.writeFile(htmlFilepath, html, 'utf8')
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return results
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} catch (error) {
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console.error(
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`\nError occurred prerendering page "${path}". Read more: https://err.sh/next.js/prerender-error:\n` +
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error
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)
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return { ...results, error: true }
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}
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}
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