发送一个文本信息，在日志里面打印出来是 [2022-02-22 19:58:15] EasyWeChat.DEBUG: Request received: {"method":"POST","uri":"http://xxxxxxxxxxxxxxxx/wechat/serve?nonce=481552807&openid=xxxxxxxxxxxxxxxxxxxxxxx&signature=c38c3305b96d09c216cf9851502b46d0e8412f9f&timestamp=1645531095","content-type":"xml","content":""} [] 不知道是什么原因？