alert('System.Net.WebException: 基础连接已经关闭: 发送时发生错误。 ---> System.IO.IOException: 无法从传输连接中读取数据: 远程主机强迫关闭了一个现有的连接。。 ---> System.Net.Sockets.SocketException: 远程主机强迫关闭了一个现有的连接。 在 System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) --- 内部异常堆栈跟踪的结尾 --- 在 System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) 在 System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) 在 System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) 在 System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) 在 System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) 在 System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) 在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 在 System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) 在 System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) 在 System.Net.ConnectStream.WriteHeaders(Boolean async) --- 内部异常堆栈跟踪的结尾 --- 在 System.Net.HttpWebRequest.GetResponse() 在 SRPCorrecting_COM.HTTP_DownLoad.HttpDownload(Page context, String httpUrl)')