Improve type imports in server/render and optimize the Edge SSR loader

packages/next/build/webpack/loaders/next-middleware-ssr-loader/render.ts

@@ -4,28 +4,13 @@ import type { BuildManifest } from '../../../../server/get-page-files'
 import type { ReactLoadableManifest } from '../../../../server/load-components'
 
 import { NextRequest } from '../../../../server/web/spec-extension/request'
-import { toNodeHeaders } from '../../../../server/web/utils'
 
 import WebServer from '../../../../server/web-server'
 import {
   WebNextRequest,
   WebNextResponse,
 } from '../../../../server/base-http/web'
 
-const createHeaders = (args?: any) => ({
-  ...args,
-  'x-middleware-ssr': '1',
-  'Cache-Control': 'no-cache, no-store, max-age=0, must-revalidate',
-})
-
-function sendError(req: any, error: Error) {
-  const defaultMessage = 'An error occurred while rendering ' + req.url + '.'
-  return new Response((error && error.message) || defaultMessage, {
-    status: 500,
-    headers: createHeaders(),
-  })
-}
-
 // Polyfilled for `path-browserify` inside the Web Server.
 process.cwd = () => ''
 
@@ -123,31 +108,20 @@ export function getRender({
   const requestHandler = server.getRequestHandler()
 
   return async function render(request: NextRequest) {
-    const { nextUrl: url, cookies, headers } = request
-    const { pathname, searchParams } = url
-
+    const { nextUrl: url } = request
+    const { searchParams } = url
     const query = Object.fromEntries(searchParams)
-    const req = {
-      url: pathname,
-      cookies,
-      headers: toNodeHeaders(headers),
-    }
 
     // Preflight request
     if (request.method === 'HEAD') {
+      // Hint the client that the matched route is a SSR page.
       return new Response(null, {
-        headers: createHeaders(),
+        headers: {
+          'x-middleware-ssr': '1',
+        },
       })
     }
 
-    // @TODO: We should move this into server/render.
-    if (Document.getInitialProps) {
-      const err = new Error(
-        '`getInitialProps` in Document component is not supported with the Edge Runtime.'
-      )
-      return sendError(req, err)
-    }
-
     const renderServerComponentData = isServerComponent
       ? query.__flight__ !== undefined
       : false

packages/next/server/dev/hot-reloader.ts

@@ -336,6 +336,8 @@ export default class HotReloader {
           )
         )
 
+      const hasEdgeRuntimePages = this.runtime === 'edge'
+
       return webpackConfigSpan
         .traceChild('generate-webpack-config')
         .traceAsyncFn(() =>
@@ -363,7 +365,7 @@ export default class HotReloader {
               }),
               // For the edge runtime, we need an extra compiler to generate the
               // web-targeted server bundle for now.
-              this.runtime === 'edge'
+              hasEdgeRuntimePages
                 ? getBaseWebpackConfig(this.dir, {
                     dev: true,
                     isServer: true,

packages/next/server/render.tsx

@@ -1,10 +1,29 @@
-import { IncomingMessage, ServerResponse } from 'http'
-import { ParsedUrlQuery, stringify as stringifyQuery } from 'querystring'
+import type { IncomingMessage, ServerResponse } from 'http'
+import type { NextRouter } from '../shared/lib/router/router'
+import type { HtmlProps } from '../shared/lib/html-context'
+import type { DomainLocale } from './config'
+import type {
+  AppType,
+  DocumentInitialProps,
+  DocumentProps,
+  DocumentContext,
+  NextComponentType,
+  RenderPage,
+  RenderPageResult,
+} from '../shared/lib/utils'
+import type { ImageConfigComplete } from './image-config'
+import type { Redirect } from '../lib/load-custom-routes'
+import type { NextApiRequestCookies, __ApiPreviewProps } from './api-utils'
+import type { FontManifest } from './font-utils'
+import type { LoadComponentsReturnType, ManifestItem } from './load-components'
+import type { GetServerSideProps, GetStaticProps, PreviewData } from '../types'
+import type { UnwrapPromise } from '../lib/coalesced-function'
+
 import React from 'react'
+import { ParsedUrlQuery, stringify as stringifyQuery } from 'querystring'
 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,
@@ -15,56 +34,38 @@ import {
   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 { isSerializableProps } from '../lib/is-serializable-props'
+import { isInAmpMode } from '../shared/lib/amp'
+import { AmpStateContext } from '../shared/lib/amp-context'
 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,
   getDisplayName,
   isResSent,
   loadGetInitialProps,
-  NextComponentType,
-  RenderPage,
-  RenderPageResult,
 } from '../shared/lib/utils'
-
 import { HtmlContext } from '../shared/lib/html-context'
-import type { HtmlProps } from '../shared/lib/html-context'
-
-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'
 import { ImageConfigContext } from '../shared/lib/image-config-context'
-import { ImageConfigComplete } from './image-config'
 import { FlushEffectsContext } from '../shared/lib/flush-effects'
 
 let optimizeAmp: typeof import('./optimize-amp').default
@@ -1248,6 +1249,13 @@ export async function renderToHTML(
    */
   const generateStaticHTML = supportsDynamicHTML !== true
   const renderDocument = async () => {
+    if (runtime === 'edge' && Document.getInitialProps) {
+      // In the Edge runtime, Document.getInitialProps isn't supported.
+      throw new Error(
+        '`getInitialProps` in Document component is not supported with the Edge Runtime.'
+      )
+    }
+
     if (!runtime && Document.getInitialProps) {
       const renderPage: RenderPage = (
         options: ComponentsEnhancer = {}

test/integration/react-streaming-and-server-components/test/index.test.js

@@ -247,12 +247,7 @@ const documentSuite = {
   runTests: (context) => {
     it('should error when custom _document has getInitialProps method', async () => {
       const res = await fetchViaHTTP(context.appPort, '/')
-      const html = await res.text()
-
       expect(res.status).toBe(500)
-      expect(html).toContain(
-        '`getInitialProps` in Document component is not supported with the Edge Runtime.'
-      )
     })
   },
   beforeAll: () => documentPage.write(documentWithGip),