Question

我正在尝试使用WCF代码中的TCP套接字连接到远程外部服务器我的WCF服务是客户端，其代码使用套接字连接到外部服务器。此代码将请求发送到外部服务器并接收服务器响应

int byteCount = 0;
        Socket m_socClient;
        try
        {

            string query = "My Request String";
            m_socClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            System.Net.IPAddress remoteIPAddress = System.Net.IPAddress.Parse("127:0:0:0");
            System.Net.IPEndPoint remoteEndPoint = new System.Net.IPEndPoint(remoteIPAddress, 1234);
            EVCommon.Log("COnnecting to" + IPSelected + Port);
            m_socClient.Connect(remoteEndPoint);
            try
            {
            if (m_socClient.Connected)
            {
                EVCommon.Log("Connected to" + IPSelected + Port);   
                var reQuestToSend = string.Format("POST /ZZZZZ HTTP/1.1\r\nContent-Length:{0}\r\n\r\n{1}", query.Length, query);
                byte[] bytesToSend = Encoding.ASCII.GetBytes(reQuestToSend);
                byteCount = m_socClient.Send(bytesToSend, SocketFlags.None);
                byte[] bytesReceived = new byte[1024];
                byteCount = m_socClient.Receive(bytesReceived, SocketFlags.None);
                Response271 = Encoding.ASCII.GetString(bytesReceived);
                m_socClient.Disconnect(false);
                m_socClient.Close(5000);
            }
            }
            catch(Exception ex)
            {
                EVCommon.Log(ex.Message);

            }


        }

如果我使用相同的客户端代码创建一个Windows应用程序来连接到远程服务器，那么它是成功的。我能够连接，发送和接收仅当我将WCF带入图片时才会出现此错误。代码在if（m_socket.Connected）处失败。所以它无法成功连接。

A request to send or receive data was disallowed because the socket 
is not connected and (when sending on a datagram socket using a sendto call) no address was supplied.

谢谢

Answer 1

不同之处在于，Windows应用程序以登录用户的身份运行，WCF服务以应用程序池的标识运行。

可能发生的情况是应用程序池作为NETWORK SERVICE运行，无法打开端口。

尝试将应用池的标识更改为您的用户，以检查这是否是问题。

由于未连接套接字，因此不允许发送或接收数据的请求

1 个答案: