Can't run sample project that uses ISR on Cloudflare via @vinext/cloudflare 1.0.0-beta.6

[grabmateusz]

Steps to reproduce:

1. Clone project https://github.com/grabmateusz/isr-on-demand-revalidate-issue
2. Migrate it to vinext as per vinext README.md
   OR
   Take code that already went through that route:
   Vinext approach grabmateusz/isr-on-demand-revalidate-issue#3
3. Try to deploy this code to Cloudflare Workers
4. Visit /isr

Expected:
ISR version of the route is rendered without a problem

Current:
500 response code, no root cause in logs

[james-elicx]

For what it's worth, the issue in your demo doesn't appear to be related to ISR. This looks like a bug in the workerd runtime with how it is treating your demo API's response. The API is returning a double-encoded response, and the runtime doesn't appear to fully support decoding responses when there are multiple content-encoding headers.

I've put together an example here demonstrating this - https://github.com/cloudflare/vinext/blob/codex%2Fworkerd-stacked-content-encoding-repro/repros/workerd-stacked-content-encoding/README.md

I'll see if there's a possibility of extending support in workerd before adding a workaround here.

[james-elicx]

I would recommend changing the API your example app is using to one that isn't returning double-compressed responses to continue with testing for now.

[james-elicx]

For reference, I've opened an issue on the workerd repo for this - cloudflare/workerd#7051