static function OnBeforeRequest(oSession: Session) {

        if (oSession.RequestHeaders.ExistsAndContains ("Sec-WebSocket-Extensions", "permessage-deflate")) {
            oSession.RequestHeaders.Remove ( "Sec-WebSocket-Extensions");
        }

在 OnBeforeRequest 后面 加上

static function OnWebSocketMessage(oMsg: WebSocketMessage) {
        // Log Message to the LOG tab
        FiddlerApplication.Log.LogString(oMsg.ToString());
    }