[Modify] Throw exception

2018-05-23 19:02:37 +09:00
parent 612ea7f7e2
commit 74cd02dace
1 changed files with 6 additions and 2 deletions
--- a/websocket-sharp/Server/WebSocketBehavior.cs
+++ b/websocket-sharp/Server/WebSocketBehavior.cs
@@ -596,8 +596,12 @@ namespace WebSocketSharp.Server
    /// </param>
    protected void SendAsync (FileInfo file, Action<bool> completed)
    {
-      if (_websocket != null)
-        _websocket.SendAsync (file, completed);
+      if (_websocket == null) {
+        var msg = "The current state of the connection is not Open.";
+        throw new InvalidOperationException (msg);
+      }
+
+      _websocket.SendAsync (file, completed);
    }

    /// <summary>