Fix bug in WinHttp WebSocket (#647)

Source/HTTP/WinHttp/winhttp_connection.cpp

@@ -396,6 +396,11 @@ HRESULT WinHttpConnection::Close(ConnectionClosedCallback callback)
             m_state = ConnectionState::WebSocketClosing;
             break;
         }
+        case ConnectionState::WebSocketClosing:
+        {
+            // Nothing to do. WinHttpClose will happen after websocket close completes
+            return S_OK;
+        }
         case ConnectionState::WinHttpClosing:
         {
             // Nothing to do 

Source/HTTP/WinHttp/winhttp_provider.cpp

@@ -242,6 +242,8 @@ HRESULT WinHttpProvider::WebSocketConnectAsync(const char* uri, const char* /*su
     m_connections.push_back(connection);
     RETURN_IF_FAILED(connection->WebSocketConnectAsync(async));
 
+    websocketHandle->impl = std::move(connection);
+
     return S_OK;
 }
 #endif