WebSocketHandlerMapping return defaultHandler when webSocketUpgradeMatch is true.

[cn19]

I register a websocket with path '/*' and also called webSocketHandlerMapping.setWebSocketUpgradeMatch(true) in my program. When I send a common http request without Upgrade header, WebSocketHandlerMapping aslo returned defaultHandler. I think webSocketUpgradeMatch should take effect for all handler include defaultHandler and getHandler() should return null when webSocketUpgradeMatch=true and no Upgrade header present.