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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 服务是具有使用套接字连接到外部服务器的代码的客户端。此代码向外部服务器发送请求并接收服务器响应

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,它是成功的。我能够连接、发送和接收只有当我将 WCF 带入图片时才会出现此错误。代码在 if(m_socket.Connected) 处失败。所以无法连接成功。

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

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1 回答 1

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区别在于windows应用程序以登录用户的身份运行,而WCF服务以应用程序池的身份运行。

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

尝试将应用程序池的身份更改为您的用户,以检查这是否是问题所在。

于 2013-07-31T07:08:10.393 回答