Vite proxy error : socket hang up

[cassepipe]

I am trying to conigure a vite proxy to make a basic https redirect to my backend like this :

import { sveltekit } from "@sveltejs/kit/vite"
import { defineConfig } from "vitest/config"

export default defineConfig({
    plugins: [sveltekit()],
    //...
    server: {
        https: {
            key: "../secrets/key.pem",
            cert: "../secrets/cert.pem",
        },
        proxy: {
            "/api": "http://localhost:3000",
        },
    },
})

But I get this error.

1:12:35 PM [vite] http proxy error at /api/auth/login:
Error: socket hang up
    at connResetException (node:internal/errors:717:14)
    at Socket.socketOnEnd (node:_http_client:519:23)
    at Socket.emit (node:events:525:35)
    at endReadableNT (node:internal/streams/readable:1359:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)

This works when I fetch the backend address directly with CORS enabled so I don't think the issue comes from my backend plus I see nothing in my backend's log.
What I am doing wrong ?

I have tried to use the more elaborate ProxyOptions object and tweaking secure or changeOrigin but it does not seem to change anything. I get the exact same error.

[cassepipe]

I updated vite and now I have this error that has a little bir more information:

8:21:53 PM [vite] Failed to load source map for /src/lib/global.js.
8:21:53 PM [vite] Failed to load source map for /src/lib/stores.js.
Error: Not found: /src/lib/global.js.map
    at resolve (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/respond.js:397:13)
    at resolve (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/respond.js:246:5)
    at #options.hooks.handle (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/index.js:43:56)
    at Module.respond (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/respond.js:243:40)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
Error: Not found: /src/lib/stores.js.map
    at resolve (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/respond.js:397:13)
    at resolve (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/respond.js:246:5)
    at #options.hooks.handle (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/index.js:43:56)
    at Module.respond (/node_modules/.pnpm/@[email protected][email protected][email protected]/node_modules/@sveltejs/kit/src/runtime/server/respond.js:243:40)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
8:22:06 PM [vite] http proxy error at /api/auth/login:
Error: socket hang up
    at connResetException (node:internal/errors:717:14)
    at Socket.socketOnEnd (node:_http_client:519:23)
    at Socket.emit (node:events:525:35)
    at endReadableNT (node:internal/streams/readable:1359:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)

[cassepipe]

Well, it seems it stems for having set https or cors because it works in plain html

[wootex]

did you find a solution for this? I am having the same problem

[SylvainFI]

same...