Enable CORS and Authentication.

Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs

@@ -11,6 +11,7 @@ using Jellyfin.Api.Auth.RequiresElevationPolicy;
 using Jellyfin.Api.Constants;
 using Jellyfin.Api.Controllers;
 using Jellyfin.Server.Formatters;
+using Jellyfin.Server.Models;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.Extensions.DependencyInjection;
@@ -71,7 +72,12 @@ namespace Jellyfin.Server.Extensions
         /// <returns>The MVC builder.</returns>
         public static IMvcBuilder AddJellyfinApi(this IServiceCollection serviceCollection, string baseUrl)
         {
-            return serviceCollection.AddMvc(opts =>
+            return serviceCollection
+                .AddCors(options =>
+                {
+                    options.AddPolicy(ServerCorsPolicy.DefaultPolicyName, ServerCorsPolicy.DefaultPolicy);
+                })
+                .AddMvc(opts =>
                 {
                     opts.UseGeneralRoutePrefix(baseUrl);
                     opts.OutputFormatters.Insert(0, new CamelCaseJsonProfileFormatter());

Jellyfin.Server/Models/ServerCorsPolicy.cs

@@ -0,0 +1,30 @@
+using Microsoft.AspNetCore.Cors.Infrastructure;
+
+namespace Jellyfin.Server.Models
+{
+    /// <summary>
+    /// Server Cors Policy.
+    /// </summary>
+    public static class ServerCorsPolicy
+    {
+        /// <summary>
+        /// Default policy name.
+        /// </summary>
+        public const string DefaultPolicyName = "DefaultCorsPolicy";
+
+        /// <summary>
+        /// Default Policy. Allow Everything.
+        /// </summary>
+        public static readonly CorsPolicy DefaultPolicy = new CorsPolicy
+        {
+            // Allow any origin
+            Origins = { "*" },
+
+            // Allow any method
+            Methods = { "*" },
+
+            // Allow any header
+            Headers = { "*" }
+        };
+    }
+}

Jellyfin.Server/Startup.cs

@@ -1,5 +1,6 @@
 using Jellyfin.Server.Extensions;
 using Jellyfin.Server.Middleware;
+using Jellyfin.Server.Models;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Configuration;
 using Microsoft.AspNetCore.Builder;
@@ -68,9 +69,10 @@ namespace Jellyfin.Server
             // TODO app.UseMiddleware<WebSocketMiddleware>();
             app.Use(serverApplicationHost.ExecuteWebsocketHandlerAsync);
 
-            // TODO use when old API is removed: app.UseAuthentication();
+            app.UseAuthentication();
             app.UseJellyfinApiSwagger(_serverConfigurationManager);
             app.UseRouting();
+            app.UseCors(ServerCorsPolicy.DefaultPolicyName);
             app.UseAuthorization();
             app.UseEndpoints(endpoints =>
             {