adapter-node over HTTP/2 `url.host` is `undefined`

[aradalvand]

Describe the bug

May be related to #3566

Using a custom server with adapter-node's handler.js to serve over HTTP/2 causes the reported hostname in URLs to be undefined.

Reproduction

Repo: https://github.com/aradalvand/sveltekit-adapter-node-http2-repro

Clone, run pnpm install, then pnpm run build, and finally node server.js (remember to use the custom server.js, don't run node build).

Then send a request to https://localhost:3000/test:

Check server logs (the related console.log is in src/routes/test/+server.js)::

Notice that the host, hostname and so on are undefined; they should obviously be localhost.

Logs

No response

System Info

System:
    OS: Linux 5.10 Ubuntu 22.04.1 LTS 22.04.1 LTS (Jammy Jellyfish)
    CPU: (4) x64 Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
    Memory: 17.05 GB / 18.67 GB
    Container: Yes
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 18.12.1 - /usr/bin/node
    Yarn: 1.22.19 - /usr/bin/yarn
    npm: 9.3.0 - /usr/bin/npm
  npmPackages:
    @sveltejs/adapter-node: ^1.2.4 => 1.2.4
    @sveltejs/kit: ^1.5.0 => 1.20.4
    svelte: ^3.54.0 => 3.59.1
    vite: ^4.3.0 => 4.3.9

Severity

blocking an upgrade

Additional Information

No response

[teemingc]

Closed by #12989