GET / with an Authorization header should fail if it's not valid

src/Tgstation.Server.Host/Controllers/ApiController.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
@@ -191,6 +191,12 @@ namespace Tgstation.Server.Host.Controllers
 		/// <returns>A <see cref="NotFoundObjectResult"/> with an appropriate <see cref="ErrorMessageResponse"/>.</returns>
 		protected new NotFoundObjectResult NotFound() => NotFound(new ErrorMessageResponse(ErrorCode.ResourceNeverPresent));
 
+		/// <summary>
+		/// Generic 401 response.
+		/// </summary>
+		/// <returns>An <see cref="ObjectResult"/> with <see cref="HttpStatusCode.NotFound"/>.</returns>
+		protected new ObjectResult Unauthorized() => this.StatusCode(HttpStatusCode.Unauthorized, null);
+
 		/// <summary>
 		/// Generic 501 response.
 		/// </summary>

src/Tgstation.Server.Host/Controllers/HomeController.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Linq;
 using System.Net;
 using System.Threading;
@@ -164,6 +164,8 @@ namespace Tgstation.Server.Host.Controllers
 					HeaderNames.Vary,
 					new StringValues(ApiHeaders.ApiVersionHeader));
 
+			// if they tried to authenticate in any form and failed, let them know immediately
+			bool failIfUnauthed;
 			if (ApiHeaders == null)
 			{
 				if (controlPanelConfiguration.Enable && !Request.Headers.TryGetValue(ApiHeaders.ApiVersionHeader, out _))
@@ -190,7 +192,14 @@ namespace Tgstation.Server.Host.Controllers
 				{
 					return HeadersIssue(ex);
 				}
+
+				failIfUnauthed = Request.Headers.Authorization.Any();
 			}
+			else
+				failIfUnauthed = ApiHeaders.Token != null;
+
+			if (failIfUnauthed && !AuthenticationContext.Valid)
+				return Unauthorized();
 
 			return Json(new ServerInformationResponse
 			{

tests/Tgstation.Server.Tests/Live/RawRequestTests.cs

@@ -210,6 +210,7 @@ namespace Tgstation.Server.Tests.Live
 
 			var badClient = clientFactory.CreateFromToken(serverClient.Url, newToken);
 			await ApiAssert.ThrowsException<UnauthorizedException, AdministrationResponse>(() => badClient.Administration.Read(cancellationToken));
+			await ApiAssert.ThrowsException<UnauthorizedException, ServerInformationResponse>(() => badClient.ServerInformation(cancellationToken));
 		}
 
 		static async Task TestOAuthFails(IServerClient serverClient, CancellationToken cancellationToken)