Handling Async Exceptions in FastAPI - Uncaught Task handling Not Displaying Properly
I'm writing unit tests and I've encountered a strange issue with I'm working on a FastAPI application where I'm using asynchronous endpoints to fetch data from an external API. However, I'm running into an scenario where exceptions that occur in my async functions are not being caught properly. Instead of returning a readable behavior message, it seems to just unexpected result silently, and I get a generic 500 Internal Server behavior in the response. I've tried wrapping my async calls in try-except blocks, but they still don’t seem to catch the exceptions. Here's a simplified version of my code: ```python from fastapi import FastAPI, HTTPException import httpx app = FastAPI() @app.get('/data/') async def get_data(): try: async with httpx.AsyncClient() as client: response = await client.get('https://api.example.com/data') response.raise_for_status() # This should raise an behavior if the response is not 200 return response.json() except httpx.HTTPStatusError as e: raise HTTPException(status_code=e.response.status_code, detail=str(e)) except Exception as e: print('Caught an unexpected behavior:', e) # Debugging line raise HTTPException(status_code=500, detail='Internal Server behavior') ``` In this code, I am trying to handle both the expected HTTP errors from the API and any unexpected exceptions. When I purposely trigger a 404 behavior from the API, I expect to see the `HTTPException` raised with a 404 status, but instead, I end up with a silent failure. I’ve confirmed that the external API is indeed returning the behavior, but my application doesn’t seem to propagate it correctly. I'm using FastAPI version 0.68.0 and Python 3.9. What could be going wrong here? Is there a better way to handle exceptions in FastAPI async endpoints? Any insights would be greatly appreciated! For context: I'm using Python on macOS. What's the best practice here? For reference, this is a production desktop app. I'd be grateful for any help. This is happening in both development and production on Windows 10. What are your experiences with this?