static routes need their root directory on startup

[Pike]

Hi, I'm having a little pet project where I want to serve data from multiple discs, including USB drives.

aiohttp/aiohttp/web_urldispatcher.py

Lines 537 to 538 in 3edc43c

	if not directory.is_dir():
	raise ValueError("Not a directory")

errors when the drives aren't mounted. And does so in a way that's non-trivial to work around.

I've tried to track down if that's just convenience or for security-related functionality, but that code changed a number of times, and I've lost track.

I wonder if it'd be OK to just drop that check?