prevent erroneous route interception during lazy fetch #64692

ztanner · 2024-04-17T23:44:15Z

When the router cache can't find a cache node for the requested segment, it performs a request to the server to get the missing data. This request to the server currently will always include the next-url header, and on soft-navigations, the router will route the request to the intercepted handler. This lazy fetch is treated as a soft navigation by the server, and will incorrectly return data for the intercepted route.

Similar to the handling in router.refresh, and the server action reducer, we should not include the next-url header if there's no interception route currently in the tree, as otherwise we'll be erroneously triggering the intercepted route.

Fixes #64676
Closes NEXT-3146

ztanner · 2024-04-17T23:44:30Z

prevent erroneous route interception during lazy fetch #64692 👈
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ijjk · 2024-04-17T23:51:52Z

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js 04-17-prevent_erroneous_route_interception_during_lazy_fetch	Change
buildDuration	16s	16s	N/A
buildDurationCached	9.9s	7.4s	N/A
nodeModulesSize	199 MB	199 MB	⚠️ +1.46 kB
nextStartRea..uration (ms)	437ms	436ms	N/A

Client Bundles (main, webpack)

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webpack-HASH.js gzip	1.64 kB	1.65 kB	N/A
Overall change	45.4 kB	45.4 kB	✓

Legacy Client Bundles (polyfills)

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Client Pages

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Rendered Page Sizes

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index.html gzip	528 B	528 B	✓
link.html gzip	540 B	541 B	N/A
withRouter.html gzip	522 B	523 B	N/A
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Edge SSR bundle Size

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edge-ssr.js gzip	94.5 kB	94.5 kB	N/A
page.js gzip	3.05 kB	3.04 kB	N/A
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Middleware size

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middleware.js gzip	25.5 kB	25.5 kB	N/A
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Overall change	839 B	839 B	✓

Next Runtimes

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app-page-exp..prod.js gzip	97.5 kB	97.5 kB	✓
app-page-tur..prod.js gzip	99.2 kB	99.2 kB	✓
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server.runti..prod.js gzip	51.6 kB	51.6 kB	✓
Overall change	945 kB	945 kB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js 04-17-prevent_erroneous_route_interception_during_lazy_fetch	Change
0.pack gzip	1.59 MB	1.59 MB	⚠️ +188 B
index.pack gzip	107 kB	107 kB	N/A
Overall change	1.59 MB	1.59 MB	⚠️ +188 B

Diff details

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Diff for 2453-HASH.js

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Diff for main-HASH.js

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Commit: ff22032

…_during_lazy_fetch

ijjk · 2024-04-18T13:08:27Z

Failing test suites

Commit: ff22032

__NEXT_EXPERIMENTAL_PPR=true pnpm test-dev test/e2e/app-dir/metadata/metadata.test.ts (PPR)

app dir - metadata > react cache > should have same title and page value when navigating

Expand output

● app dir - metadata › react cache › should have same title and page value when navigating

expect(received).toBe(expected) // Object.is equality

Expected: "0.16012099107658795"
Received: "0.3894233674949976"

  1006 |         const obj = JSON.parse(title)
  1007 |         // Check `cache()`
> 1008 |         expect(obj.val.toString()).toBe(value)
       |                                    ^
  1009 |         // Check `fetch()`
  1010 |         // TODO-APP: Investigate why fetch deduping doesn't apply but cache() does.
  1011 |         if (!isNextDev) {

  at Object.toBe (e2e/app-dir/metadata/metadata.test.ts:1008:36)

Read more about building and testing Next.js in contributing.md.

When the router cache can't find a cache node for the requested segment, it performs a request to the server to get the missing data. This request to the server currently will always include the `next-url` header, and on soft-navigations, the router will route the request to the intercepted handler. This lazy fetch is treated as a soft navigation by the server, and will incorrectly return data for the intercepted route. Similar to the handling in `router.refresh`, and the server action reducer, we should not include the `next-url` header if there's no interception route currently in the tree, as otherwise we'll be erroneously triggering the intercepted route. Fixes #64676 Closes NEXT-3146

prevent erroneous route interception during lazy fetch

eee7203

ijjk added created-by: Next.js team PRs by the Next.js team. tests type: next labels Apr 17, 2024

ztanner marked this pull request as ready for review April 18, 2024 00:10

ztanner requested review from timneutkens, ijjk, shuding, huozhi, feedthejim and wyattjoh as code owners April 18, 2024 00:10

ijjk approved these changes Apr 18, 2024

View reviewed changes

Merge branch 'canary' into 04-17-prevent_erroneous_route_interception…

ff22032

…_during_lazy_fetch

ztanner enabled auto-merge (squash) April 18, 2024 13:17

ztanner merged commit 3966181 into canary Apr 18, 2024
74 of 79 checks passed

ztanner deleted the 04-17-prevent_erroneous_route_interception_during_lazy_fetch branch April 18, 2024 13:22

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prevent erroneous route interception during lazy fetch #64692

prevent erroneous route interception during lazy fetch #64692

ztanner commented Apr 17, 2024 •

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ztanner commented Apr 17, 2024

ijjk commented Apr 17, 2024 •

edited

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ijjk commented Apr 18, 2024

prevent erroneous route interception during lazy fetch #64692

prevent erroneous route interception during lazy fetch #64692

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ztanner commented Apr 17, 2024 • edited Loading

ztanner commented Apr 17, 2024

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ijjk commented Apr 18, 2024

Failing test suites

ztanner commented Apr 17, 2024 •

edited

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ijjk commented Apr 17, 2024 •

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