Steps for detecting a 401 Unauthorized error in SignalR when the token has expired

I have created a dynamic page that continuously fetches real-time information from my Azure functions backend using SignalR. If I am on the page for an hour and experience a disconnect, the signalr client will attempt to reconnect automatically, which usually works well. However, there is a possibility that the JWT token may expire during this reconnection process, resulting in a 401 error being thrown from the signalr client.

Is there a way to capture this 401 error from the signalr client when a reconnect is triggered?

Many users tend to use .onclose() or obtain a new JWT token every time they connect, which could be a potential solution. But I am wondering if there is a way to handle this scenario more effectively without necessarily fetching a new token each time. Any insights would be highly appreciated!

var connection = new signalR.HubConnectionBuilder()
                .configureLogging(signalR.LogLevel.Information)
                .withUrl(config.default.hostname + "/api/v1/core/signalr",
                    { accessTokenFactory: () => store.state.accessToken })
                .withAutomaticReconnect([0, 0, 10000])
                .build();

connection.start();

I hope my query is clear! Thank you!

Answer №1

It's important to implement a function like

{ accessTokenFactory: () => store.state.accessToken }
in order to ensure seamless token refreshing. Storing the token in store.state.accessToken is not recommended as it may lead to complications when the token expires.

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