[Modify] Polish it

8 years ago · 098a10ca4e
parent e3f19c6157
commit 098a10ca4e
1 changed files with 2 additions and 2 deletions
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@ -823,8 +823,8 @@ namespace WebSocketSharp.Server
        throw new InvalidOperationException (msg);
      }
-      if (message == null)
+      if (message.IsNullOrEmpty ())
-        throw new ArgumentNullException ("message");
+        return broadping (WebSocketFrame.EmptyPingBytes, _waitTime);
      byte[] bytes;
      if (!message.TryGetUTF8EncodedBytes (out bytes)) {