Fix getServerSideProps hanging in dev on early end

[ijjk]

This fixes the case where calling res.end() is getServerSideProps would cause the request to hang in development due to our Proxy around res causing internal ServerResponse fields to not be available (related post). I also migrated our getServerSideProps test suite to an e2e suite with a test for this case.

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Fixes: #15118
Fixes: #32824
Closes: #33129

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
buildDuration	17.9s	18.4s	⚠️ +412ms
buildDurationCached	3.9s	4s	⚠️ +132ms
nodeModulesSize	355 MB	355 MB	⚠️ +598 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.618	3.684	⚠️ +0.07
/ avg req/sec	690.94	678.55	⚠️ -12.39
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.657	1.722	⚠️ +0.06
/error-in-render avg req/sec	1509.14	1452.21	⚠️ -56.93

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	27.2 kB	27.2 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71 kB	71 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
_app-HASH.js gzip	1.37 kB	1.37 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	326 B	326 B	✓
dynamic-HASH.js gzip	2.37 kB	2.37 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	919 B	919 B	✓
image-HASH.js gzip	4.7 kB	4.7 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.13 kB	2.13 kB	✓
routerDirect..HASH.js gzip	321 B	321 B	✓
script-HASH.js gzip	383 B	383 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.1 kB	14.1 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
buildDuration	18.8s	19.2s	⚠️ +456ms
buildDurationCached	3.8s	4.2s	⚠️ +345ms
nodeModulesSize	355 MB	355 MB	⚠️ +598 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.509	3.561	⚠️ +0.05
/ avg req/sec	712.55	702.14	⚠️ -10.41
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.71	1.617	-0.09
/error-in-render avg req/sec	1461.68	1545.94	+84.26

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	27.3 kB	27.3 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71.3 kB	71.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	305 B	305 B	✓
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.36 kB	2.36 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	911 B	911 B	✓
image-HASH.js gzip	4.73 kB	4.73 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.19 kB	2.19 kB	✓
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	375 B	375 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.1 kB	14.1 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js fix/gssp-early-end	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: d9d4bb0