Socket Io Rooms

Now that we are well acquainted with socket io let us write a chat application which we can use to chat on different chat rooms.

Socket io rooms.

For your convenience each socket automatically joins a room identified by its id see socket id. Each socket in socket io is identified by a random unguessable unique identifier socket id for your convenience each socket automatically joins a room identified by its own id. If you are using some db o nosql you can save it for distributed environments. 296 opened nov 19 2018 by cschwaderer the function that takes a list of sockets in a room takes a long time.

The mechanics of joining rooms are handled by the adapter that has been configured see server adapter above defaulting to socket io adapter. One thing to keep in mind while using rooms is. These channels are called rooms. We will allow users to choose a username and allow them to chat using them.

A client library that loads on the browser side socket io client. A server that integrates with or mounts on the node js http server socket io. Sending to all clients in game room including sender io in game emit big announcement the game will start soon. Sending to a specific room in a specific namespace including.

Socket io is composed of two parts. Rooms are used to further separate concerns. In that case every socket in the room excluding the sender will get the event. Sending to all clients in namespace mynamespace including sender io of mynamespace emit bigger announcement the tournament will start soon.

During development socket io serves the client automatically for us as we ll see so for now we only have to install one module. Where you can save socket id or other identifier with rooms. Rooms also share the same socket connection like namespaces. In disconnect event you can query this object to know the rooms you have to leave.

Within each namespace you can also define arbitrary channels that sockets can join and leave. Additonally if rooms list is temporary you can clean it whit controlled event after disconnecting.