修复None 导致的 xss filter 工作异常
修复None 导致的 xss filter 工作异常

Timeship/OnlineJudge-QDU,Timeship/OnlineJudge-1,Timeship/OnlineJudge-QDU,Timeship/OnlineJudge-QDU,wangmingjob/OnlineJudge,Timeship/OnlineJudge-QDU,Timeship/OnlineJudge-1,wangmingjob/OnlineJudge,wangmingjob/OnlineJudge,Timeship/OnlineJudge-1,wangmingjob/OnlineJudge,Timeship/OnlineJudge-1