How to call HttpContext.SignOutAsync from StartUp.cs after waitandretry fails in .net core App

[davecameos]

Summary: What are you wanting to achieve?

I would like to sign out the user if the wait and retry fails. How can I call HttpContext.SignOutAsync that is in a method in a controller, when the last attempt fails? This is the code I have got so far:

Startup.cs

static IAsyncPolicy<HttpResponseMessage> GetRetryPolicy()
{
            var jittered = Backoff.DecorrelatedJitterBackoffV2(medianFirstRetryDelay: TimeSpan.FromSeconds(6), retryCount: 3);
           
            return HttpPolicyExtensions
                .HandleTransientHttpError()
                // Handle 404 not found
                .OrResult(msg => msg.StatusCode == System.Net.HttpStatusCode.NotFound)
                // Handle 401 Unauthorized
                .OrResult(msg => msg.StatusCode == System.Net.HttpStatusCode.Unauthorized)
                // Handle Network failures, HTTP 5XX status codes (server errors) and HTTP 408 status code (request timeout)               
                .WaitAndRetryAsync(jittered, onRetry: (exception, calculatedWaitDuration) => {
                    // exception handler
                    //Debug.WriteLine("Policy Logging: {0}", exception.Exception.Message);
                    **// TODO SIGN OUT CURRENT SESSION**

                });
        } 

 public void ConfigureServices(IServiceCollection services)
{
 // code abbreviated for simplicity
  services.AddHttpClient<TSClient>("TSHttpClient", 
                x => { x.BaseAddress = new Uri(Configuration["TSAPIConfiguration:BaseAddress"]); }
                ).AddPolicyHandler(GetRetryPolicy());
} 

This works well. It tries for a number of times to execute the code and if it fails, it throws the exception. I would like to sign out the current user to force them to log in again.

I have this method to log out when clicking on a log out button. How can I call this from GetRetryPolicy() in startup? Is there an easier way?

public async Task Logout()
{                     
            await HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme, new AuthenticationProperties
            { 
                RedirectUri = Url.Action("Index","Home")
            });
 }

Thank you.

[martincostello]

Maybe it would be easier to catch the exception thrown by Polly when the retries all fail, and then do the sign-out from the catch clause? Then the Polly setup doesn't need access to the HttpContext or to make any extended business logic decisions?

[davecameos]

Thank you. I will try that and see if I can get it to work.

[github-actions[bot]]

This issue is stale because it has been open for 60 days with no activity. It will be automatically closed in 14 days if no further updates are made.

[github-actions[bot]]

This issue was closed because it has been inactive for 14 days since being marked as stale.