Address WebSocket Byte Array handling

src/FishyFlip/ATWebSocketProtocol.cs

@@ -169,6 +169,12 @@ private void Dispose(bool disposing)
 
     private void HandleMessage(byte[] byteArray)
     {
+        if (byteArray.Length == 0)
+        {
+            this.logger?.LogDebug("WSS: ATError reading message. Empty byte array.");
+            return;
+        }
+
         using var stream = new MemoryStream(byteArray);
         CBORObject[]? objects = null;
         try
@@ -286,25 +292,21 @@ private async Task ReceiveMessages(ClientWebSocket webSocket, CancellationToken
             try
             {
 #if NETSTANDARD
-                var result =
-                    await webSocket.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), token);
+                var result = await webSocket.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), token);
                 if (result is not { MessageType: WebSocketMessageType.Binary, EndOfMessage: true })
                 {
                     continue;
                 }
 
-                byte[] newArray = new byte[result.Count];
-                Array.Copy(receiveBuffer, 0, newArray, 0, result.Count);
+                var newArray = receiveBuffer.AsSpan(0, result.Count).ToArray();
 #else
-                var result =
-                    await webSocket.ReceiveAsync(new Memory<byte>(receiveBuffer), token);
+                var result = await webSocket.ReceiveAsync(receiveBuffer, token);
                 if (result is not { MessageType: WebSocketMessageType.Binary, EndOfMessage: true })
                 {
                     continue;
                 }
 
-                byte[] newArray = new byte[result.Count];
-                Array.Copy(receiveBuffer, 0, newArray, 0, result.Count);
+                var newArray = receiveBuffer.AsSpan(0, result.Count).ToArray();
 #endif
 
                 Task.Run(() => this.HandleMessage(newArray)).FireAndForgetSafeAsync(this.logger);

src/FishyFlip/Models/FrameHeader.cs

@@ -15,6 +15,11 @@ public class FrameHeader
     /// <param name="obj">The CBOR Object.</param>
     public FrameHeader(CBORObject obj)
     {
+        if (obj.Count <= 0)
+        {
+            return;
+        }
+
         this.Operation = (FrameHeaderOperation)(obj["op"]?.AsInt32() ?? 0);
         this.Type = obj["t"]?.AsString();
     }