socket-redis | WebSocket pub/sub server | Websocket library

I needed to set

TL;DR: you have to override default Redis connection settings of ws4redis

I've bumped into this when I was implementing custom Django command, which was supposed to send a websocket message on certain server-side events.

If you look at the source code of RedisPublisher class, you will notice this line at the very top:

redis_connection_pool = ConnectionPool(**settings.WS4REDIS_CONNECTION)

while comments for ConnectionPool.__init__() state following:

By default, TCP connections are created connection_class is specified. Use redis.UnixDomainSocketConnection for unix sockets.

So when you're instantiating RedisPublisher it uses ConnectionPool which, by default, does not know anything about sockets. Therefore 2 approaches are possible:

1. Switch default Connection to UnixDomainSocketConnection in ConnectionPool instantiation or
2. Substitute ConnectionPool with StrictRedis connection which has built-in capabilities to use unix socket (named argument unix_socket_path).

This is how I solved it using 2nd approach (it appears cleaner for me):