Root path behind a proxy

[efficks]

I have a litestar API behind a proxy (traefik). The API is served at /api/2 and the proxy is responsible to strip the path so litestar serve the API on the root path /. The API works fine.
The OpenAPI plugin are configured to be served at /docs. But the openapi plugin are searching at /docs/openapi.json for the schema instead of /api/2.
My HTTP proxy add the HTTP header X-Script-Name to the request header with the root URL server. How could I intercept this header to dynamically set the root path for the OpenAPI plugin? Is it possible?
For the moment, the only solution I see is to prevent the proxy to strip the root URL and statically tell Litestar it's root url behind /api/2. Is it possible to make this dynamic?

[provinzkraut]

How are you running the app? Sounds like you could make use of e.g. uvicorn's root-path setting

[efficks]

I'm running litestar with uvicorn. Using uvicorn's root-path, open-api is not served on the right path.
What's actually working is setting the Litestar rootpath (via Litestar(path=os.env.get("ROOT_PATH")).
What i'm looking for is a way for litestar to dynamically detect this root path via the X-SCRIPT-NAME request header the proxy is sending with every request. But it needs to work with the API and OpenApi plugins.
Should I transform this discutions to a feature request?

[euri10]

isnt this issue related ? #2077