From 410871e14882fe8622c4d992658eb30f0c850a3e Mon Sep 17 00:00:00 2001
From: Joshua Boniface <joshua@boniface.me>
Date: Sun, 24 Jul 2022 12:35:46 -0400
Subject: Backport pull request #7732 from jellyfin/release-10.8.z

Fix to make web sockets close gracefully on server shutdown

Authored-by: luke brown <luke92brown@gmail.com>

Merged-by: Cody Robibero <cody@robibe.ro>

Original-merge: ee22feb89a34632a4cc3a350733dd57c6be863ec
---
 Emby.Server.Implementations/ApplicationHost.cs | 46 +++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

(limited to 'Emby.Server.Implementations/ApplicationHost.cs')

diff --git a/Emby.Server.Implementations/ApplicationHost.cs b/Emby.Server.Implementations/ApplicationHost.cs
index 32289625fe..bc55dc6b48 100644
--- a/Emby.Server.Implementations/ApplicationHost.cs
+++ b/Emby.Server.Implementations/ApplicationHost.cs
@@ -111,7 +111,7 @@ namespace Emby.Server.Implementations
     /// <summary>
     /// Class CompositionRoot.
     /// </summary>
-    public abstract class ApplicationHost : IServerApplicationHost, IDisposable
+    public abstract class ApplicationHost : IServerApplicationHost, IAsyncDisposable, IDisposable
     {
         /// <summary>
         /// The environment variable prefixes to log at server startup.
@@ -1232,5 +1232,49 @@ namespace Emby.Server.Implementations
 
             _disposed = true;
         }
+
+        public async ValueTask DisposeAsync()
+        {
+            await DisposeAsyncCore().ConfigureAwait(false);
+            Dispose(false);
+            GC.SuppressFinalize(this);
+        }
+
+        /// <summary>
+        /// Used to perform asynchronous cleanup of managed resources or for cascading calls to <see cref="DisposeAsync"/>.
+        /// </summary>
+        /// <returns>A ValueTask.</returns>
+        protected virtual async ValueTask DisposeAsyncCore()
+        {
+            var type = GetType();
+
+            Logger.LogInformation("Disposing {Type}", type.Name);
+
+            foreach (var (part, _) in _disposableParts)
+            {
+                var partType = part.GetType();
+                if (partType == type)
+                {
+                    continue;
+                }
+
+                Logger.LogInformation("Disposing {Type}", partType.Name);
+
+                try
+                {
+                    part.Dispose();
+                }
+                catch (Exception ex)
+                {
+                    Logger.LogError(ex, "Error disposing {Type}", partType.Name);
+                }
+            }
+
+            // used for closing websockets
+            foreach (var session in _sessionManager.Sessions)
+            {
+                await session.DisposeAsync().ConfigureAwait(false);
+            }
+        }
     }
 }
-- 
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