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fix: use a reentrant lock when accessing active connections (#11256)

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This commit is contained in:
Claus Vium 2024-03-30 17:30:00 +01:00 committed by GitHub
parent fe88a484d1
commit 4201079b34
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2 changed files with 18 additions and 41 deletions
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22
Emby.Server.Implementations/HttpServer/WebSocketManager.cs
View File

@ -48,7 +48,7 @@ namespace Emby.Server.Implementations.HttpServer
WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync().ConfigureAwait(false);
using var connection = new WebSocketConnection(
var connection = new WebSocketConnection(
_loggerFactory.CreateLogger<WebSocketConnection>(),
webSocket,
authorizationInfo,
@ -56,17 +56,19 @@ namespace Emby.Server.Implementations.HttpServer
{
OnReceive = ProcessWebSocketMessageReceived
};
var tasks = new Task[_webSocketListeners.Length];
for (var i = 0; i < _webSocketListeners.Length; ++i)
await using (connection.ConfigureAwait(false))
{
tasks[i] = _webSocketListeners[i].ProcessWebSocketConnectedAsync(connection, context);
var tasks = new Task[_webSocketListeners.Length];
for (var i = 0; i < _webSocketListeners.Length; ++i)
{
tasks[i] = _webSocketListeners[i].ProcessWebSocketConnectedAsync(connection, context);
}
await Task.WhenAll(tasks).ConfigureAwait(false);
await connection.ReceiveAsync().ConfigureAwait(false);
_logger.LogInformation("WS {IP} closed", context.Connection.RemoteIpAddress);
}
await Task.WhenAll(tasks).ConfigureAwait(false);
await connection.ReceiveAsync().ConfigureAwait(false);
_logger.LogInformation("WS {IP} closed", context.Connection.RemoteIpAddress);
}
catch (Exception ex) // Otherwise ASP.Net will ignore the exception
{

37
MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
View File

@ -33,7 +33,7 @@ namespace MediaBrowser.Controller.Net
SingleWriter = false
});
private readonly SemaphoreSlim _lock = new(1, 1);
private readonly object _activeConnectionsLock = new();
/// <summary>
/// The _active connections.
@ -126,15 +126,10 @@ namespace MediaBrowser.Controller.Net
InitialDelayMs = dueTimeMs
};
_lock.Wait();
try
lock (_activeConnectionsLock)
{
_activeConnections.Add((message.Connection, cancellationTokenSource, state));
}
finally
{
_lock.Release();
}
}
protected void SendData(bool force)
@ -153,8 +148,7 @@ namespace MediaBrowser.Controller.Net
(IWebSocketConnection Connection, CancellationTokenSource CancellationTokenSource, TStateType State)[] tuples;
var now = DateTime.UtcNow;
await _lock.WaitAsync().ConfigureAwait(false);
try
lock (_activeConnectionsLock)
{
if (_activeConnections.Count == 0)
{
@ -174,10 +168,6 @@ namespace MediaBrowser.Controller.Net
})
.ToArray();
}
finally
{
_lock.Release();
}
if (tuples.Length == 0)
{
@ -240,8 +230,7 @@ namespace MediaBrowser.Controller.Net
/// <param name="message">The message.</param>
private void Stop(WebSocketMessageInfo message)
{
_lock.Wait();
try
lock (_activeConnectionsLock)
{
var connection = _activeConnections.FirstOrDefault(c => c.Connection == message.Connection);
@ -250,10 +239,6 @@ namespace MediaBrowser.Controller.Net
DisposeConnection(connection);
}
}
finally
{
_lock.Release();
}
}
/// <summary>
@ -283,15 +268,10 @@ namespace MediaBrowser.Controller.Net
Logger.LogError(ex, "Error disposing websocket");
}
_lock.Wait();
try
lock (_activeConnectionsLock)
{
_activeConnections.Remove(connection);
}
finally
{
_lock.Release();
}
}
protected virtual async ValueTask DisposeAsyncCore()
@ -306,18 +286,13 @@ namespace MediaBrowser.Controller.Net
Logger.LogError(ex, "Disposing the message consumer failed");
}
await _lock.WaitAsync().ConfigureAwait(false);
try
lock (_activeConnectionsLock)
{
foreach (var connection in _activeConnections.ToArray())
{
DisposeConnection(connection);
}
}
finally
{
_lock.Release();
}
}
/// <inheritdoc />