How do I get the client id?

[CovertCode]

Let's say there are 10 clients connected to my socket server and I want to send a message to specific client from my backend. So for this I think there's need of client id or client address. But I checked the documentation there's no mention of client id of list of connected clients.

Can someone give me directions of how to achieve this? I jumped directly to uWebSocket and I'm new to this.

[hst-m]

You give it whatever ID you want, and store it to look up later however you want

store the ws by ID in a Map:

const wsMap=new Map()

open:ws=>wsMap.set(id,ws)
close:ws=>wsMap.delete(id)

wsMap.get(id).send(message)

or use Subscribe / Publish by ID:

open:ws=>ws.subscribe(id)

app.publish(id,message)

[Totalus]

How does those two solutions compare memory wise ? Any idea ?

I'm wondering if uWS already maintains an internal mapping of sockets that could be used to retreive the socket instead of creating a new mapping, which would save the additional mapping memory.

[kronos-999]

A quick example with redis would be helpful and appreciated. I do not seem able to store and retrieve the ws object to use ws.send later

[e3dio]

You store references to sockets in Objects or Maps socketsObject[id] = ws or socketsMap.set(id, ws) and send socketsObject[id].send(msg) or socketsMap.get(id).send(msg) Inserting and deleting from Map is supposed to be faster than Object

[ghost]

A quick example with redis would be helpful and appreciated. I do not seem able to store and retrieve the ws object to use ws.send later

You can't store a ws object to disk because it's not serializable and it would make no sense if it was.

[ghost]

If you're talking about some kind of session id, that's implemented as a cookie. You can get cookies like in example UpgradeSync but overall I think you're projecting past experiences on to this project. This project is somewhat less abstract.