Catch `Exception` globally in FastAPI

In case you want to capture all unhandled exceptions (internal server error), there’s a very simple way of doing it. Documentation

from fastapi import FastAPI
from starlette.requests import Request
from starlette.responses import Response
from traceback import print_exception

app = FastAPI()

async def catch_exceptions_middleware(request: Request, call_next):
    try:
        return await call_next(request)
    except Exception:
        # you probably want some kind of logging here
        print_exception(e)
        return Response("Internal server error", status_code=500)

app.middleware('http')(catch_exceptions_middleware)

Make sure you place this middleware before everything else.