`request.body()` not works

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Example Code

from fastapi.exceptions import RequestValidationError
from fastapi.requests import Request

...

@app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request,
                                       exc: RequestValidationError):
    print(await request.body())

Description

I made POST /bla-bla-bla with invalid data, when the error occurred I can’t see the body of the request, swagger endlessly loads something

Operating System

macOS

Operating System Details

MacOS 12.1 Monterey

FastAPI Version

0.70.1

Python Version

3.9.9

Additional Context

No response

[upeshphable]

Refer to issue #394

[panla]

in fastapi docs https://fastapi.tiangolo.com/advanced/custom-request-and-route/