[Bug]: Advanced Middleware does not work with Next 13.0.1

[orinokai]

Summary

Next 13.0.1 introduces a breaking change that adds a ResponseCookies class. This new class uses the deprecated method, getAll, which is not implemented in Deno's fetch and thus throws a 500 error.

I imagine the solution will be to polyfill the method in the @netlify/next middleware response object.

Steps to reproduce

1. Clone repro site
2. Run ntl dev

A link to a reproduction repository

https://github.com/orinokai/test-next-adv-middleware

Next Runtime version

4.28.3

More information about your build

• I am building using the CLI
• I am building using file-based configuration (netlify.toml)

What OS are you using?

Mac OS

Your netlify.toml file

`netlify.toml`

# Paste content of your `netlify.toml` file here

Your public/_redirects file

`_redirects`

# Paste content of your `_redirects` file here

Your next.config.js file

`next.config.js`

# Paste content of your `next.config.js` file here. Check there is no private info in there.

Builds logs (or link to your logs)

Build logs

# Paste logs here

Function logs

Function logs

# Paste logs here

.next JSON files

generated .next JSON files

# Paste file contents here. Please check there isn't any private info in them
# You can either build locally, or download the deploy from Netlify by clicking the arrow next to the deploy time.

[SeanMcTernan]

Hey team, any update on this one?

[nickytonline]

It's been prioritized, but work hasn't started on this yet.

[ascorbic]

Referring to whatwg/fetch#973, this could be implemented using headers.entries(), which returns multiple entries for set-cookie if found.