[🐛 Bug]: TypeError: This ReadableStream is disturbed (has already been read from) and cannot be used as a body.

[amorey]

next-on-pages environment related information

System:
Platform: darwin
Arch: x64
Version: Darwin Kernel Version 24.1.0: Thu Oct 10 21:02:27 PDT 2024; root:xnu-11215.41.3~2/RELEASE_X86_64
CPU: (8) x64 Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
Memory: 32 GB
Shell: /bin/zsh
Package Manager Used: pnpm (9.14.2)

Relevant Packages:
@cloudflare/next-on-pages: 1.13.7
vercel: N/A
next: 15.0.3

Description

Using @edge-csrf/nextjs in middleware produces the error:

TypeError: This ReadableStream is disturbed (has already been read from) and cannot be used as a body.

Presumably this is because @edge-csrf/nextjs the parses the request body but it's still unexpected because the library only uses edge API methods to parse the request:
https://github.com/kubetail-org/edge-csrf/blob/main/shared/src/util.ts#L64-L122

I created a version of @edge-csrf/nextjs that clones the request before parsing it but I'm still getting the same error:
https://github.com/kubetail-org/edge-csrf/blob/2.5.3-cloudflare/packages/nextjs/src/index.ts#L66

Reproduction

This example project uses next@15 and @edge-csrf/[email protected]:
https://github.com/kubetail-org/edge-csrf/tree/2.5.3-cloudflare/examples/next15-cloudflare-pages

Pages Deployment Method

Direct Upload (wrangler pages publish or the @cloudflare/pages-action GitHub Action)

Pages Deployment ID

No response

Additional Information

No response

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