Blazor Server project not registering hangfire route in IIS production environment

bug?
,
1

When deploying a release build of my Blazor Server app and hosting it with IIS, the /hangfire endpoint is caught by the default Blazor routing as “not found”. However, it is working locally, in debug mode, using IIS Express.

How do I get the hangfire dashboard to work on a Blazor Server app in IIS on a server?

Implementation

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddHangfire(x =>
{
    x.UseSqlServerStorage(builder.Configuration.GetConnectionString("DefaultConnection"), new SqlServerStorageOptions
    {
        PrepareSchemaIfNecessary = true,
    });
    x.UseConsole();
});

builder.Services.AddHangfireServer();

var app = builder.Build();
app.UseHangfireDashboard("/hangfire", new DashboardOptions
{
    Authorization = new[]
    {
        new HangfireCustomBasicAuthenticationFilter{
            User = "test",
            Pass = "test"
        }
    }
});

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
    endpoints.MapBlazorHub();
    endpoints.MapHangfireDashboard();
    endpoints.MapFallbackToPage("/_Host");
});
2

Just a guess, since I don’t code in Blazor, but this line is probably overwriting your UseHangfireDashboard settings:

endpoints.MapHangfireDashboard();

Everything else in your configuration seems correct, based on how I have Hangfire configured in an ASP.NET 6 app.

I’m basing this assumption off a very quick glance at the source code for this extension method, for here: https://github.com/HangfireIO/Hangfire/blob/98193fa12d2681661fe852eed72e16eb57653fc0/src/Hangfire.AspNetCore/HangfireEndpointRouteBuilderExtensions.cs#L30

3

I used only endpoints.MapHangfireDashboard(). then only app.UseHangfireDashboard() and vice versa, did not fix the issue.

Setting IgnoreAntiforgeryToken = true for the dashboard seems to have fixed the issue. Perhaps Blazor Server and Hangfire use conflicting or different Anti Forgery Tokens when enabling security?

  • Removed using endpoints
  • Added IgnoreAntiforgeryToken = true
  • Removed Authorization for Dashboard as this was also not working

Working implementation Blazor Server

app.UseHttpsRedirection();

app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();
app.MapBlazorHub();
app.MapFallbackToPage("/_Host");

app.UseHangfireDashboard("/hangfire", new DashboardOptions
{
    IgnoreAntiforgeryToken = true,
});