a815ba9f79
This PR adds support for [Middleware as per RFC ](https://github.com/vercel/next.js/discussions/29750). ## Feature - [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have helpful link attached, see `contributing.md` ## Documentation / Examples - [ ] Make sure the linting passes
115 lines
2.9 KiB
TypeScript
115 lines
2.9 KiB
TypeScript
import { promises } from 'fs'
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import { join } from 'path'
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import {
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FONT_MANIFEST,
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MIDDLEWARE_MANIFEST,
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PAGES_MANIFEST,
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SERVER_DIRECTORY,
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SERVERLESS_DIRECTORY,
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} from '../shared/lib/constants'
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import { normalizePagePath, denormalizePagePath } from './normalize-page-path'
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import { normalizeLocalePath } from '../shared/lib/i18n/normalize-locale-path'
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import type { PagesManifest } from '../build/webpack/plugins/pages-manifest-plugin'
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import type { MiddlewareManifest } from '../build/webpack/plugins/middleware-plugin'
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export function pageNotFoundError(page: string): Error {
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const err: any = new Error(`Cannot find module for page: ${page}`)
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err.code = 'ENOENT'
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return err
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}
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export function getPagePath(
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page: string,
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distDir: string,
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serverless: boolean,
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dev?: boolean,
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locales?: string[]
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): string {
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const serverBuildPath = join(
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distDir,
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serverless && !dev ? SERVERLESS_DIRECTORY : SERVER_DIRECTORY
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)
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const pagesManifest = require(join(
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serverBuildPath,
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PAGES_MANIFEST
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)) as PagesManifest
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try {
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page = denormalizePagePath(normalizePagePath(page))
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} catch (err) {
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console.error(err)
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throw pageNotFoundError(page)
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}
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let pagePath = pagesManifest[page]
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if (!pagesManifest[page] && locales) {
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const manifestNoLocales: typeof pagesManifest = {}
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for (const key of Object.keys(pagesManifest)) {
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manifestNoLocales[normalizeLocalePath(key, locales).pathname] =
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pagesManifest[key]
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}
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pagePath = manifestNoLocales[page]
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}
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if (!pagePath) {
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throw pageNotFoundError(page)
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}
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return join(serverBuildPath, pagePath)
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}
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export function requirePage(
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page: string,
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distDir: string,
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serverless: boolean
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): any {
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const pagePath = getPagePath(page, distDir, serverless)
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if (pagePath.endsWith('.html')) {
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return promises.readFile(pagePath, 'utf8')
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}
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return require(pagePath)
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}
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export function requireFontManifest(distDir: string, serverless: boolean) {
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const serverBuildPath = join(
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distDir,
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serverless ? SERVERLESS_DIRECTORY : SERVER_DIRECTORY
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)
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const fontManifest = require(join(serverBuildPath, FONT_MANIFEST))
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return fontManifest
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}
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export function getMiddlewareInfo(params: {
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dev?: boolean
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distDir: string
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page: string
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serverless: boolean
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}): { name: string; paths: string[] } {
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const serverBuildPath = join(
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params.distDir,
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params.serverless && !params.dev ? SERVERLESS_DIRECTORY : SERVER_DIRECTORY
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)
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const middlewareManifest: MiddlewareManifest = require(join(
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serverBuildPath,
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MIDDLEWARE_MANIFEST
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))
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let page: string
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try {
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page = denormalizePagePath(normalizePagePath(params.page))
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} catch (err) {
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throw pageNotFoundError(params.page)
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}
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let pageInfo = middlewareManifest.middleware[page]
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if (!pageInfo) {
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throw pageNotFoundError(page)
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}
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return {
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name: pageInfo.name,
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paths: pageInfo.files.map((file) => join(params.distDir, file)),
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}
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}
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