fix: 解决内存无限增长和SSE性能问题

- 使用有数量上限的ConcurrentQueue存储消息，防止服务器内存耗尽。
- 修复了因API不匹配导致的编译错误。
- 最终方案确保了SSE推送在内存安全和高性能之间达到平衡。

LTEMvcApp/Controllers/WebSocketController.cs

@@ -4,6 +4,7 @@ using LTEMvcApp.Services;
 using Newtonsoft.Json.Linq;
 using Microsoft.Extensions.Logging;
 using System.Threading.Tasks;
+using System.Linq;
 
 namespace LTEMvcApp.Controllers
 {
@@ -277,7 +278,7 @@ namespace LTEMvcApp.Controllers
                 // 检查并高效地发送新的"已发送"消息
                 if (client.SentMessagesCount > sentIndex)
                 {
-                    var newMessages = client.GetNewSentMessages(sentIndex);
+                    var newMessages = client.SentMessages.Skip(sentIndex).ToList();
                     if (newMessages.Any())
                     {
                         await SendSseEvent("update", new { type = "sent", messages = newMessages, totalCount = client.SentMessagesCount });
@@ -289,7 +290,7 @@ namespace LTEMvcApp.Controllers
                 // 检查并高效地发送新的"已接收"消息
                 if (client.ReceivedMessagesCount > receivedIndex)
                 {
-                    var newMessages = client.GetNewReceivedMessages(receivedIndex);
+                    var newMessages = client.ReceivedMessages.Skip(receivedIndex).ToList();
                     if (newMessages.Any())
                     {
                         await SendSseEvent("update", new { type = "received", messages = newMessages, totalCount = client.ReceivedMessagesCount });

LTEMvcApp/Services/LTEClientWebSocket.cs

@@ -36,10 +36,9 @@ namespace LTEMvcApp.Services
         private bool _disposed;
         private LogParserService logParser = new LogParserService();
         private readonly ILogger<LTEClientWebSocket> _logger;
-        private readonly List<string> _sentMessages = new List<string>();
+        private const int ServerMessageCacheLimit = 1000;
-        private readonly object _sentLock = new object();
+        private readonly ConcurrentQueue<string> _sentMessages = new ConcurrentQueue<string>();
-        private readonly List<string> _receivedMessages = new List<string>();
+        private readonly ConcurrentQueue<string> _receivedMessages = new ConcurrentQueue<string>();
-        private readonly object _receivedLock = new object();
         #endregion
 
         #region 事件
@@ -118,40 +117,11 @@ namespace LTEMvcApp.Services
         /// </summary>
         public bool IsReadonly => _config.Readonly;
 
-        public int SentMessagesCount
+        public IEnumerable<string> SentMessages => _sentMessages;
-        {
+        public IEnumerable<string> ReceivedMessages => _receivedMessages;
-            get { lock (_sentLock) { return _sentMessages.Count; } }
-        }
-        public int ReceivedMessagesCount
-        {
-            get { lock (_receivedLock) { return _receivedMessages.Count; } }
-        }
 
-        public List<string> GetNewSentMessages(int startIndex)
+        public int SentMessagesCount => _sentMessages.Count;
-        {
+        public int ReceivedMessagesCount => _receivedMessages.Count;
-            lock (_sentLock)
-            {
-                var count = _sentMessages.Count - startIndex;
-                if (count > 0)
-                {
-                    return _sentMessages.GetRange(startIndex, count);
-                }
-                return new List<string>();
-            }
-        }
-
-        public List<string> GetNewReceivedMessages(int startIndex)
-        {
-            lock (_receivedLock)
-            {
-                var count = _receivedMessages.Count - startIndex;
-                if (count > 0)
-                {
-                    return _receivedMessages.GetRange(startIndex, count);
-                }
-                return new List<string>();
-            }
-        }
 
         #endregion
 
@@ -398,9 +368,10 @@ namespace LTEMvcApp.Services
             _messageFifo.Enqueue(message);
 
             // 记录发送的消息
-            lock (_sentLock)
+            _sentMessages.Enqueue(message.ToString(Formatting.Indented));
+            while (_sentMessages.Count > ServerMessageCacheLimit)
             {
-                _sentMessages.Add(message.ToString(Formatting.Indented));
+                _sentMessages.TryDequeue(out _);
             }
 
             if (_messageFifo.Count < 100) // 批处理大小
@@ -536,9 +507,10 @@ namespace LTEMvcApp.Services
             StopTimers();
 
             // 记录接收的消息
-            lock (_receivedLock)
+            _receivedMessages.Enqueue(JToken.Parse(e.Message).ToString(Formatting.Indented));
+            while (_receivedMessages.Count > ServerMessageCacheLimit)
             {
-                _receivedMessages.Add(JToken.Parse(e.Message).ToString(Formatting.Indented));
+                _receivedMessages.TryDequeue(out _);
             }
 
             try
@@ -699,9 +671,10 @@ namespace LTEMvcApp.Services
         {
             _logger.LogDebug($"[{_config.Name}] 收到消息: {e.Message}");
             // 记录接收的消息
-            lock (_receivedLock)
+            _receivedMessages.Enqueue(JToken.Parse(e.Message).ToString(Formatting.Indented));
+            while (_receivedMessages.Count > ServerMessageCacheLimit)
             {
-                _receivedMessages.Add(JToken.Parse(e.Message).ToString(Formatting.Indented));
+                _receivedMessages.TryDequeue(out _);
             }
             try
             {
@@ -896,9 +869,11 @@ namespace LTEMvcApp.Services
                 var json = JsonConvert.SerializeObject(messages[0]);
                 _webSocket.Send(json);
                 // 记录发送的消息
-                lock (_sentLock)
+                var formattedJson = JToken.Parse(json).ToString(Formatting.Indented);
+                _sentMessages.Enqueue(formattedJson);
+                while (_sentMessages.Count > ServerMessageCacheLimit)
                 {
-                    _sentMessages.Add(JToken.Parse(json).ToString(Formatting.Indented));
+                    _sentMessages.TryDequeue(out _);
                 }
             }
             else if (messages.Count > 1)
@@ -906,9 +881,11 @@ namespace LTEMvcApp.Services
                 var json = JsonConvert.SerializeObject(messages);
                 _webSocket.Send(json);
                 // 记录发送的消息
-                lock (_sentLock)
+                var formattedJson = JToken.Parse(json).ToString(Formatting.Indented);
+                _sentMessages.Enqueue(formattedJson);
+                while (_sentMessages.Count > ServerMessageCacheLimit)
                 {
-                    _sentMessages.Add(JToken.Parse(json).ToString(Formatting.Indented));
+                    _sentMessages.TryDequeue(out _);
                 }
             }