Cache No-Revalidate Pages (#9170)

* Cache No-Revalidate Pages

* Specifically check for `false`

packages/next/next-server/server/next-server.ts

@@ -4,6 +4,7 @@ import { IncomingMessage, ServerResponse } from 'http'
 import { join, resolve, sep } from 'path'
 import { parse as parseQs, ParsedUrlQuery } from 'querystring'
 import { parse as parseUrl, UrlWithParsedQuery } from 'url'
+
 import { withCoalescedInvoke } from '../../lib/coalesced-function'
 import {
   BUILD_ID_FILE,
@@ -22,7 +23,7 @@ import {
   isDynamicRoute,
 } from '../lib/router/utils'
 import * as envConfig from '../lib/runtime-config'
-import { NextApiRequest, NextApiResponse, isResSent } from '../lib/utils'
+import { isResSent, NextApiRequest, NextApiResponse } from '../lib/utils'
 import { apiResolver } from './api-utils'
 import loadConfig, { isTargetLikeServerless } from './config'
 import { recursiveReadDirSync } from './lib/recursive-readdir-sync'
@@ -32,9 +33,8 @@ import { getPagePath } from './require'
 import Router, { Params, route, Route, RouteMatch } from './router'
 import { sendHTML } from './send-html'
 import { serveStatic } from './serve-static'
+import { getSprCache, initializeSprCache, setSprCache } from './spr-cache'
 import { isBlockedPage, isInternalUrl } from './utils'
-import { findPagesDir } from '../../lib/find-pages-dir'
-import { initializeSprCache, getSprCache, setSprCache } from './spr-cache'
 
 type NextConfig = any
 
@@ -542,12 +542,18 @@ export default class Server {
     // TODO: ETag? Cache-Control headers? Next-specific headers?
     res.setHeader('Content-Type', type)
     res.setHeader('Content-Length', Buffer.byteLength(payload))
-
-    if (revalidate) {
-      res.setHeader(
-        'Cache-Control',
-        `s-maxage=${revalidate}, stale-while-revalidate`
-      )
+    if (!this.renderOpts.dev) {
+      if (revalidate) {
+        res.setHeader(
+          'Cache-Control',
+          `s-maxage=${revalidate}, stale-while-revalidate`
+        )
+      } else if (revalidate === false) {
+        res.setHeader(
+          'Cache-Control',
+          `s-maxage=31536000, stale-while-revalidate`
+        )
+      }
     }
     res.end(payload)
   }

test/integration/prerender/test/index.test.js

@@ -5,6 +5,7 @@ import { join } from 'path'
 import webdriver from 'next-webdriver'
 import {
   renderViaHTTP,
+  fetchViaHTTP,
   findPort,
   launchApp,
   killApp,
@@ -202,14 +203,20 @@ const runTests = (dev = false) => {
 
   if (dev) {
     it('should always call getStaticProps without caching in dev', async () => {
-      const initialHtml = await renderViaHTTP(appPort, '/something')
+      const initialRes = await fetchViaHTTP(appPort, '/something')
+      expect(initialRes.headers.get('cache-control')).toBeFalsy()
+      const initialHtml = await initialRes.text()
       expect(initialHtml).toMatch(/hello.*?world/)
 
-      const newHtml = await renderViaHTTP(appPort, '/something')
+      const newRes = await fetchViaHTTP(appPort, '/something')
+      expect(newRes.headers.get('cache-control')).toBeFalsy()
+      const newHtml = await newRes.text()
       expect(newHtml).toMatch(/hello.*?world/)
       expect(initialHtml !== newHtml).toBe(true)
 
-      const newerHtml = await renderViaHTTP(appPort, '/something')
+      const newerRes = await fetchViaHTTP(appPort, '/something')
+      expect(newerRes.headers.get('cache-control')).toBeFalsy()
+      const newerHtml = await newerRes.text()
       expect(newerHtml).toMatch(/hello.*?world/)
       expect(newHtml !== newerHtml).toBe(true)
     })
@@ -230,6 +237,15 @@ const runTests = (dev = false) => {
       }
     })
   } else {
+    it('should should use correct caching headers for a no-revalidate page', async () => {
+      const initialRes = await fetchViaHTTP(appPort, '/something')
+      expect(initialRes.headers.get('cache-control')).toBe(
+        's-maxage=31536000, stale-while-revalidate'
+      )
+      const initialHtml = await initialRes.text()
+      expect(initialHtml).toMatch(/hello.*?world/)
+    })
+
     it('outputs a prerender-manifest correctly', async () => {
       const manifest = JSON.parse(
         await fs.readFile(join(appDir, '.next/prerender-manifest.json'), 'utf8')