[BUG] using yield in route

Describe the bug

I am not sure if it is a bug, or a feature request. Perhaps using yield in a route is not intended by fastapi.

To Reproduce

1. Create a file with:

@app.get("/")
async def root():
    print('hello')
    yield JSONResponse({'some': 'text'})
    print('world')

1. Open the browser and call the endpoint /.

Expected behaviour

The {‘some’: ‘text’} as json.

Screenshots

But this is what I get.

Environment

• Linux Mint 19
• Fastapi 0.54.1

[HuiiBuh]

@tiangolo Just out of interest. Do you consider supporting yield as response?

[Dustyposa]

If you want to do something after send a response. You can try background task