Workaround oauth2-redirect.html not working due tu "window.opener is null"

[Aeris1One]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to FastAPI but to Pydantic.
• I already checked if it is not related to FastAPI but to Swagger UI (I know it is -> please see note below).
• I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

• I commit to help with one of those options 👆

Example Code

from fastapi import Depends, HTTPException, status, FastAPI
from fastapi.security import OAuth2
from jose import JWTError, ExpiredSignatureError, jwt

app = FastAPI()

# We're using OAuth2 for authentication with authorization code flow
oauth2_scheme = OAuth2(
    flows={
        "authorizationCode": {
            "authorizationUrl": "https://authserver.tld/oidc/auth",
            "tokenUrl": "https://authserver.tld/oidc/token",
            "scopes": {
                "openid": "OpenID Connect",
                "profile": "Profile infos",
                "email": "Email"
            }
        }
    }
)

jwk_set = something

# dummy function that just return the decoded jwt
def get_jwt(token: str = Depends(oauth2_scheme)) -> dict:
    try:
        payload = jwt.decode(token, jwk_set, algorithms=["HS256"])
    except JWTError:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")
    except ExpiredSignatureError:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Token expired")

    return payload

# dummy endpoint to simply return the decoded jwt
@app.get("/")
async def root(jwt: dict = Depends(get_jwt)):
    return {"payload": jwt}

Description

NOTE : This is kinda unrelated to FastAPI, it is an issue with SwaggerUI but there's a workaround decribed in the issue on GitHub, I would like to apply this workaround using FastAPI. Please, do not respond/close this due to it being unrelated.

• Open /docs
• Try to use the "Authorize" button
• You're successfully redirected to your authentication provider
• Login on you auth provider
• You're redirected back to /docs/oauth2-redirect.html?someparams
• You're on a blank page, with an error in the console

Related issue on Swagger UI Github : swagger-api/swagger-ui#8030.

Is there a way to apply the workaround using FastAPI ?

Operating System

Linux, Windows

Operating System Details

No response

FastAPI Version

0.100.0

Python Version

3.11.1

Additional Context

No response