2023-02-23 10:46:36,023: System.Net.WebException: 无法连接到远程服务器 ---> System.Net.Sockets.SocketException: 由于目标计算机积极拒绝，无法连接。 172.16.21.112:8080
   在 System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   在 System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- 内部异常堆栈跟踪的结尾 ---
   在 System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
   在 System.Net.HttpWebRequest.GetRequestStream()
   在 ARI.EAP.HOST.Utilities.HttpUtils.sentPOST(String url, String content) 位置 D:\工作\瑞昌碲化镉\EAP\LEDE\EAP\Utilities\HttpUtils.cs:行号 45