Support reverse proxies.

Author: hajekj

Web/Program.cs

@@ -10,6 +10,7 @@
 using Microsoft.Identity.Web.TokenCacheProviders.InMemory;
 using System.Net.Http.Headers;
 using System.Security.Claims;
+using Microsoft.AspNetCore.HttpOverrides;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -94,6 +95,14 @@
     app.UseHsts();
 }
 
+// https://learn.microsoft.com/en-us/dotnet/core/compatibility/aspnet-core/8.0/forwarded-headers-unknown-proxies
+app.UseForwardedHeaders(new ForwardedHeadersOptions()
+{
+    KnownNetworks = { },
+    KnownProxies = { },
+    ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
+});
+
 app.UseHttpsRedirection();
 app.UseStaticFiles();