Are there any ways to register some functions which will be executed when exiting daphne?

[HullQin]

I am using daphne to deploy my websocket app, without django or channels.

I hope the data in memory can be saved on disk when I exit daphne.

Do you have any good ideas? Thanks :)

[HullQin]

I thought I got the answer from the source code.

Just write this:

from twisted.internet import reactor


def before_shutdown():
    print('Succeed!')


reactor.addSystemEventTrigger("before", "shutdown", before_shutdown)


async def application(scope, receive, send):
    pass

[carltongibson]

You might also use an ASGI Lifespan middleware for this kind of thing. 🤔

[HullQin]

Thanks, it's more graceful ~

[HullQin]

Sorry, but it seems that Daphne currently does not support lifespan 😂

[carltongibson]

Ah, yes... I thought we'd knocked that one off. ... Still happy to add it with a suitable PR.