Return NoResult only when request doesn't have a token.

Emby.Server.Implementations/HttpServer/Security/AuthService.cs

@@ -1,5 +1,6 @@
 #pragma warning disable CS1591
 
+using System;
 using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Authentication;
 using MediaBrowser.Controller.Net;
@@ -20,9 +21,15 @@ namespace Emby.Server.Implementations.HttpServer.Security
         public AuthorizationInfo Authenticate(HttpRequest request)
         {
             var auth = _authorizationContext.GetAuthorizationInfo(request);
+
+            if (!auth.HasToken)
+            {
+                throw new AuthenticationException("Request does not contain a token.");
+            }
+
             if (!auth.IsAuthenticated)
             {
-                throw new AuthenticationException("Invalid token.");
+                throw new SecurityException("Invalid token.");
             }
 
             if (auth.User?.HasPermission(PermissionKind.IsDisabled) ?? false)

Emby.Server.Implementations/HttpServer/Security/AuthorizationContext.cs

@@ -102,7 +102,8 @@ namespace Emby.Server.Implementations.HttpServer.Security
                 DeviceId = deviceId,
                 Version = version,
                 Token = token,
-                IsAuthenticated = false
+                IsAuthenticated = false,
+                HasToken = false
             };
 
             if (string.IsNullOrWhiteSpace(token))
@@ -111,6 +112,7 @@ namespace Emby.Server.Implementations.HttpServer.Security
                 return authInfo;
             }
 
+            authInfo.HasToken = true;
             var result = _authRepo.Get(new AuthenticationInfoQuery
             {
                 AccessToken = token

Jellyfin.Api/Auth/CustomAuthenticationHandler.cs

@@ -1,5 +1,4 @@
 using System.Globalization;
-using System.Linq;
 using System.Security.Claims;
 using System.Text.Encodings.Web;
 using System.Threading.Tasks;
@@ -8,7 +7,6 @@ using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Authentication;
 using MediaBrowser.Controller.Net;
 using Microsoft.AspNetCore.Authentication;
-using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 
@@ -79,8 +77,7 @@ namespace Jellyfin.Api.Auth
             }
             catch (SecurityException ex)
             {
-                _logger.LogDebug(ex, "Error authenticating with {Handler}", nameof(CustomAuthenticationHandler));
+                return Task.FromResult(AuthenticateResult.Fail(ex));
-                return Task.FromResult(AuthenticateResult.NoResult());
             }
         }
     }

MediaBrowser.Controller/Net/AuthorizationInfo.cs

@@ -58,5 +58,10 @@ namespace MediaBrowser.Controller.Net
         /// Gets or sets a value indicating whether the token is authenticated.
         /// </summary>
         public bool IsAuthenticated { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the request has a token.
+        /// </summary>
+        public bool HasToken { get; set; }
     }
 }