Customizable serverTimeoutInMilliseconds in Server-Side Blazor #18840
Description
When debugging a server-side blazor app we often see this error pop up in the client (browser) while stepping through code:
Error: Connection disconnected with error 'Error: Server timeout elapsed without receiving a message from the server.'.
This can be pretty disruptive, requiring a refresh of the browser to recover after continuing the debug session.
Presumably, this happens because the server isn't sending keepalives on the SignalR connection while I'm stepping through code in the debugger. When running in a 'development' environment, I'd like to be able to customize the serverTimeoutInMilliseconds on the HubConnection to prevent this. I see examples of how to customize the SignalR settings for a server-side Blazor app using code like this:
<environment exclude="Development">
<script src="_framework/blazor.server.js"></script>
</environment>
<environment include="Development">
<script src="_framework/blazor.server.js" autostart="false"></script>
<script>
(function start() {
Blazor.start({
logLevel: 1, // LogLevel.Debug
configureSignalR: builder => builder.configureLogging("debug") // LogLevel.Debug
});
})();
</script>
</environment>
However, I'm unable to change the serverTimeoutInMilliseconds setting. This setting is available on the HubConnection object, but I don't have access to that object. I only have access to HubConnectionBuilder. And HubConnectionBuilder doesn't have a serverTimeoutInMilliseconds property.
It seems like adding support for configuring the serverTimeoutInMilliseconds via HubConnectionBuilder would be the simplest solution.
Even nicer would be some way to configure this setting in my Startup.cs, probably with a new property available somewhere under the AddServerSideBlazor call, similar to how I can customize the server-side hub settings via AddServerSideBlazor().AddHubOptions(options => ... ).