Pre-render blocking cURL when using +server.js

Description

This project was created using pnpm create svelte.

When using prerender within a +server.js file and attempting to execute a SEMRush cURL command a 405 Method not allowed is returned, however when using prerender with a +page.server.js file a 200 OK is returned (which is expected).

We've also noticed then when sending the cURL request with -H 'Accept: text/html' +server.js will return 200 OK.

Expected

A 200 OK response should be returned even with +server.js.

Actual

A 405 Method not allowed is currently returned when using +server.js.

Set up

Reproducing the bug seems to be fairly easy:

• Write export const prerender = true to src/routes/+server.js
• Build website
• Preview website
• Execute cURL command

Preparing the website

echo 'export const prerender = true' > 'src/routes/+server.js'
pnpm build
pnpm preview

Testing the website

• Fail – curl http://localhost:4173
• Pass – curl -H 'Accept: text/html' http://localhost:4173