private CircuitHost GetOrCreateCircuitHost(HttpContext context, CircuitNavigationStatus navigationStatus)
{
if (context.Items.TryGetValue(CircuitHostKey, out var existingHost))
{
return((CircuitHost)existingHost);
}
else
{
var result = _circuitFactory.CreateCircuitHost(
context,
client: new CircuitClientProxy(), // This creates an "offline" client.
GetFullUri(context.Request),
GetFullBaseUri(context.Request));
result.UnhandledException += CircuitHost_UnhandledException;
context.Response.OnCompleted(() =>
{
result.UnhandledException -= CircuitHost_UnhandledException;
if (!navigationStatus.Navigated)
{
_registry.RegisterDisconnectedCircuit(result);
}
return(Task.CompletedTask);
});
context.Items.Add(CircuitHostKey, result);
return(result);
}
}
private CircuitNavigationStatus GetOrCreateNavigationStatus(HttpContext context)
{
if (context.Items.TryGetValue(NavigationStatusKey, out var existingHost))
{
return((CircuitNavigationStatus)existingHost);
}
else
{
var navigationStatus = new CircuitNavigationStatus();
context.Items[NavigationStatusKey] = navigationStatus;
return(navigationStatus);
}
}
private static async Task CleanupCircuitState(HttpContext context, CircuitNavigationStatus navigationStatus, CircuitHost circuitHost)
{
navigationStatus.Navigated = true;
context.Items.Remove(CircuitHostKey);
await circuitHost.DisposeAsync();
}