I want to know socket connected user list on phoenix. I used Presence and it works but it notifies all connection changes to all clients. I don’t want it. The idea I have now is monitoring sockets with worker, but I want to know any better idea. Thanks!

Track all the users in Presence under a key different to the channel name. This will prevent users from receiving the diff messages.

I had another method found earlier within this forum and that is to intercept(["presence_diff"]) inside the channel module. That’s the message phoenix tries to send to provide the presence to connected clients. By intercepting you are able the change the outgoing message (even changing it to a no-o…

It surely does convey the intention quite well, but not trying to send diffs in the first place is probably the better implementation than trying to send them just to discard them on their way. I’m not sure how performance intensive a noop intercept is, but it has a warning that customizing messages…

Maybe I’m doing something wrong but no matter the key I use (e.g.: internal:users), Presence still sends the presence_diff message to all users. def handle_info(:after_join, socket) do {:ok, _ref} = Presence.track(socket, "internal:users", %{ user_id: socket.assigns.user_id, …

Are you sure the topic chosen is not one covered by a channel?

I would say so. This is the rest of my user_channel.ex file: def join("all_users", _params, socket) do user_id = socket.assigns.user_id {:ok, %{user_id: user_id}, socket} end def join("user:" <> user_id, _params, socket) when user_id == socket.assigns.user_id do send(self(), :aft…

[image] rogerweb: Presence.track(socket, "internal:users", %{ user_id: socket.assigns.user_id, online_at: inspect(System.system_time(:second)) }) You’re not changing the topic here. When you use track/3 it’s track(socket, key, metadata). You want track/4 as track(pid, t…

That was it. I was taking the term key in your comments literally, when I should have thought about it as the topic. [image] LostKobrakai: Track all the users in Presence under a key different to the channel name [image] LostKobrakai: If you track users in presence using e.g. something l…

[image] rogerweb: I was taking the term key in your comments literally, I’ve edited my post, so hopefully you’re the last one to fall for that.

Is it possible to get all connected sockets on phoenix?

Questions & Help Questions

LostKobrakai September 2, 2022, 4:12pm 11

I’ve edited my post, so hopefully you’re the last one to fall for that.