I have an ASP.NET Core 5 MVC app, with the default/root route set like this inside PageController:
[AllowAnonymous]
[Route("/")]
public IActionResult __Home(int? parent)
{
return View();
}
This worked fine until I added OpenIdConnect authentication. After that, the root (/) page no longer routes to __Home in the PageController, it just returns a blank page. All other pages route just fine.
When I comment out this:
services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
.AddMicrosoftIdentityWebApp(Configuration, "AzureAdB2C");
then / works again, so I know it's something to do with the authentication. As you can see, I have added [AllowAnonymous] to that action.
I have this in my startup:
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}"
);
});
Any ideas on how to fix this? I know it's unconventional to have the default/root route in a weird controller/action like that, but there are reasons for it, so I'm hoping it can still work.
More Info:
I found that if I move app.UseEndpoints above app.UseAuthentication, then the home page shows. After logging in (with B2C), however, it goes into an infinite loop (i.e. the authentication token doesn't stick?).
EDIT: My Startup.cs class
using Blank.Models;
using Microsoft.AspNetCore.Authentication.OpenIdConnect;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Authorization;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Identity.Web;
namespace Blank
{
public class Startup
{
private readonly AppSettings appSettings = null;
public Startup(IConfiguration configuration)
{
Configuration = configuration;
this.appSettings = new AppSettings();
this.Configuration.Bind(this.appSettings);
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
.AddMicrosoftIdentityWebApp(Configuration, "AzureAdB2C");
services.AddSession();
services.Configure<OpenIdConnectOptions>(Configuration.GetSection("AzureAdB2C"));
services.AddControllersWithViews(options =>
{
var policy = new AuthorizationPolicyBuilder()
.RequireAuthenticatedUser()
.Build();
options.Filters.Add(new AuthorizeFilter(policy));
});
services.Configure<AppSettings>(this.Configuration);
services.AddEntityFrameworkSqlServer().AddDbContext<BlankDBContext>(
Options => Options.UseSqlServer(Microsoft.Extensions.Configuration.ConfigurationExtensions.GetConnectionString(this.Configuration, "BlankDatabase"))
);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseSession();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Page}/{action=Index}/{id?}");
});
}
}
}
Edit 2
I think that app.UseAuthentication() is breaking/returning the blank page, because when I put the following code before app.UseAuthentication() I get something on the home page, and if it's after then blank:
app.Use(async (context, next) =>
{
var endpoint = context.GetEndpoint();
if (endpoint != null)
{
await context.Response.WriteAsync("<html> Endpoint :" + endpoint.DisplayName + " <br>");
if (endpoint is RouteEndpoint routeEndpoint)
{
await context.Response.WriteAsync("RoutePattern :" + routeEndpoint.RoutePattern.RawText + " <br>");
}
}
else
{
await context.Response.WriteAsync("End point is null");
}
await context.Response.WriteAsync("</html>");
await next();
});
So perhaps it has to do with my authentication? Here's my appsettings.json:
"AzureAdB2C": {
"Instance": "https://abc.b2clogin.com",
"Domain": "abc.onmicrosoft.com",
"ClientId": "62...f1",
"TenantId": "7e...ae",
"SignUpSignInPolicyId": "B2C_1_SUSI",
"SignedOutCallbackPath": "/"
},
