Merge pull request #4013 from crobibero/dynamic-cors

Allow CORS domains to be configured

1 files changed, 49 insertions, 0 deletions

diff --git a/Jellyfin.Server/Configuration/CorsPolicyProvider.cs b/Jellyfin.Server/Configuration/CorsPolicyProvider.cs
new file mode 100644
index 000000000..0d04b6bb1
--- /dev/null
+++ b/Jellyfin.Server/Configuration/CorsPolicyProvider.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Configuration;
+using Microsoft.AspNetCore.Cors.Infrastructure;
+using Microsoft.AspNetCore.Http;
+
+namespace Jellyfin.Server.Configuration
+{
+    /// <summary>
+    /// Cors policy provider.
+    /// </summary>
+    public class CorsPolicyProvider : ICorsPolicyProvider
+    {
+        private readonly IServerConfigurationManager _serverConfigurationManager;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CorsPolicyProvider"/> class.
+        /// </summary>
+        /// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
+        public CorsPolicyProvider(IServerConfigurationManager serverConfigurationManager)
+        {
+            _serverConfigurationManager = serverConfigurationManager;
+        }
+
+        /// <inheritdoc />
+        public Task<CorsPolicy> GetPolicyAsync(HttpContext context, string policyName)
+        {
+            var corsHosts = _serverConfigurationManager.Configuration.CorsHosts;
+            var builder = new CorsPolicyBuilder()
+                .AllowAnyMethod()
+                .AllowAnyHeader();
+
+            // No hosts configured or only default configured.
+            if (corsHosts.Length == 0
+                || (corsHosts.Length == 1
+                    && string.Equals(corsHosts[0], CorsConstants.AnyOrigin, StringComparison.Ordinal)))
+            {
+                builder.AllowAnyOrigin();
+            }
+            else
+            {
+                builder.WithOrigins(corsHosts)
+                    .AllowCredentials();
+            }
+
+            return Task.FromResult(builder.Build());
+        }
+    }
+}