Deny access to unauthenticated users with django channels

Denying the connection on connect attempt is as simple as this: do not send the accept message at all if you don't want to establish a connection. Channels will close it automatically after a configured amount of time (5 seconds or smth like that by default).

def connect(self, message, **kwargs):
    if not message.user.is_anonymous:
        self.send({"accept": True})

If you do not want to wait and close the connection immediately, just send {"close": True} instead:

def connect(self, message, **kwargs):
    if not message.user.is_anonymous:
        self.send({"accept": True})
    else:
        self.send({"close": True})

For the sake of completeness, here is the explanation from the channels docs. Sadly, this information is not listed in the documentation itself, only in release notes to v1.0.

Just do this:

if user.is_authenticated():
    # allow it