anurag.peshne
Phoenix websocket: how to send message to one user
Hello,
I’m new to Phoenix and I’m following this tutorial Channels — Phoenix v1.8.8 to implement something similar to chat application as described in that tutorial.
That article talks about how to broadcast a message, I want to send a message to a particular user. And I couldn’t find something similar to send. How I can do that.
Also, to do this, do I have to save all the connected socket objects in another process’s state, maybe using a map which maps username → socket.
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kokolegorille
The trick is to broadcast to a specific user with
socket.endpoint.broadcast!(“user:#{id}”, message, payload)
amnu3387
AFAIK the phoenix team is not yet charging for creating topics, so it’s free.
(j/k)
The cost will probably be one entry with one term in an ETS table? How that translates into “really” useful information I’m not sure.
axelson
Quite cheap, I wouldn’t worry about it at this point.
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