fix: added cache control headers for static app routes (#72521)
This pull request includes several changes to improve cache control
handling and add new test cases for verifying cache headers in the
standalone mode of the application.
Improvements to cache control handling:
*
[`packages/next/src/server/base-server.ts`](diffhunk://#diff-6f4291cc2bfc5073fdca12a014011769e840ee68583db1468acef075f037015aL3295-R3298):
Updated cache control conditions to check for `undefined` explicitly
before setting cache headers.
[[1]](diffhunk://#diff-6f4291cc2bfc5073fdca12a014011769e840ee68583db1468acef075f037015aL3295-R3298)
[[2]](diffhunk://#diff-6f4291cc2bfc5073fdca12a014011769e840ee68583db1468acef075f037015aL3318-R3324)
[[3]](diffhunk://#diff-6f4291cc2bfc5073fdca12a014011769e840ee68583db1468acef075f037015aR3354-R3365)
New test cases:
*
[`test/production/standalone-mode/required-server-files/required-server-files-app.test.ts`](diffhunk://#diff-0d083b6c7bd3a8a3e9c5ee854123ada3b72db58220d8b65912b047b082f834a2R104-R129):
Added test cases to verify that the correct cache headers are sent for
app routes and app pages.
New static and dynamic route handlers:
*
`test/production/standalone-mode/required-server-files/app/api/test/[slug]/route.js`:
Added a new dynamic route handler with forced static generation.
([test/production/standalone-mode/required-server-files/app/api/test/[slug]/route.jsR1-R7](diffhunk://#diff-1cf8a2cfdbb6473656b2456af0267556270fbbaa7ee2c37e2f3e6c6fed1e4d21R1-R7))
*
`test/production/standalone-mode/required-server-files/app/test/[slug]/page.jsx`:
Added a new static page with a revalidation interval and a function to
generate static parameters.
([test/production/standalone-mode/required-server-files/app/test/[slug]/page.jsxR1-R9](diffhunk://#diff-32038443ca3e4f28db37a6543966397682c64cf6f34e6dd03fd8096414d23022R1-R9))
- Fixes https://github.com/vercel/next.js/issues/65814
Co-authored-by: Janka Uryga <lolzatu2@gmail.com>
Co-authored-by: Sam Ko <sam@vercel.com>
