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RSC caching redirect behavior fix via Vary header #79363

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abhi12299
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Fixes #79346

When RSC response is received by the browser for a page, the CDN can cache it and the payload is shown to the user as-is if they close and re-open the tab. This behavior is fixed by adding a Vary header to the response and setting it to the value RSC, Next-Router-State-Tree, Next-Url, Accept-Encoding so that the response is not cached by the CDN when the user closes and opens the tab again.

Demo:

fix.rsc.behaviour.mov

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changeset-bot bot commented May 19, 2025

⚠️ No Changeset found

Latest commit: 866d83b

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@ijjk
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ijjk commented May 19, 2025

Allow CI Workflow Run

  • approve CI run for commit: 866d83b

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

@adhhamsafwan
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This should be it. Please fix this soon.

@andreiursan23
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Also having this issue. Please bring this fix sooner

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Redirects drop _rsc & lead to dirty cache in Chrome
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