Blazor server logout on SignalR connection break

Question

My Blazor server-side application logs out the user whenever the SignalR connection breaks. For example, when I lock my phone for half an hour and then return to the site, I'm logged out. How can I prevent this from happening?

Answer 1

you can't. on lost connection, the server Blazor instance hangs around for a little while waiting for a reconnect, but it exits as it don't know if the user will every reconnect. The client code just reloads the Blazor app if the Signal/R session can not reconnect.

if you need the Blazor app to recover from a Signal/R disconnect (and mobile browser are very aggressive at disconnecting, switching tabs will do it) you need to make the app recoverable. The app should save the state to a persistent store (server or local storage). on app load, it should check for the saved state and reset values. each page should check for saved state at init. it must also clear saved state (say when navigating away). a seamless recovery requires saving every keystroke, but this is pretty expensive.