[Python] How to add body content to FastAPI's RedirectResponse?

I would like to use an audio file inside the /check_base endpoint in the example below. However, I can't send the file in FastAPI's RedirectResponse body. The /check endpoint returns a RedirectResponse, which only accepts a URL parameter.

Here is my code:

@router.post("/check")
async def check(
request: Request
):
file = StarletteUploadFile(filename="/home/hello.wav")
redirect_url = app.url_path_for("check_base", **{'audio':file)

response = RedirectResponse(url=redirect_url)
return response


@router.post("/check_base")
async def check_base(
request: Request,
audio: UploadFile = File(...)
):

Continue reading...