Cloudflare context is not avaiable in middleware on 404 route

[TorbjornHoltmon]

Astro Info

Astro                    v5.1.1
Node                     v22.3.0
System                   macOS (arm64)
Package Manager          pnpm
Output                   server
Adapter                  @astrojs/cloudflare
Integrations             none

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

When in development, when returning a 404 response on an Astro page, the Cloudflare context is not available inside middleware.

It works fine when deployed to Cloudflare.

I know this is an adapter issue, but I have experienced similar issues in the past ( #10421 ) and it might be related to how 404 pages ( 404 rewrites? ) are handled internally in Astro.

The repro is not stackblitz because I am not sure if the Cloudflare proxy even works there.

I also created an issue on the adapter repo ( withastro/adapters#492 )

What's the expected result?

The cloudflare context should be available in middleware on 404 pages

Link to Minimal Reproducible Example

https://github.com/TorbjornHoltmon/missing-cloudflare-context-repro

Participation

• I am willing to submit a pull request for this issue.