Options Other than SignalR to push info to a specific Client via .Net Core?

Question

Scenario: I am waiting for webhook to hit my controller endpoint in .Net Core thereby confirming a payment by the customer to a third party. Ideally I would like this controller to trigger a message I send specifically to the customer who paid.

Problem: From what I'm reading I cannot call a hub method (SignalR) from my controller unless I intend to send to all clients. While my hub is tracking users via a dictionary of unique ids, I'm assuming that injecting a hub context as stated here will create a new instance of the hub without access to the existing ids in the hub that's running. Are there any other options for pushing a message to a specific client after receiving the webhook confirmation to my controller?

@PeterBons this is just me reading here: https://stackoverflow.com/questions/46904678/call-signalr-core-hub-method-from-controller — Jonny Mac, Sep 11 '21 at 18:41
@JonnyMac can you add the customer to a group on connecting and only send the message to that signalr group? — 97ldave, Sep 21 '21 at 10:37

score 0 · Accepted Answer · answered Sep 29 '21 at 16:05

Looks like the solution for me is to create the payment through the hub (instead of a normal rest API) and pass the connectionId (The hub has a dictionary of userId and connectionId) for the client as information to be passed back by the third party webhook. This way when I receive the webhook call I also get the connectionId to reference when I call the hub service like this:

await _hubContext.Clients.Client(connectionID).SendAsync("CompletePayment", transactionId);

Options Other than SignalR to push info to a specific Client via .Net Core?

1 Answers1