No connection could be made because the target mac

Question

I'm using the WCF4.0 template -REST. I'm trying to make a method that uploads a file using a stream.

The problem always occur at

Stream serverStream = request.GetRequestStream();

Class for streaming:

namespace LogicClass
{
    public class StreamClass : IStreamClass
    {
        public bool UploadFile(string filename, Stream fileStream)
        {
            try
            {
                FileStream fileToupload = new FileStream(filename, FileMode.Create);
                byte[] bytearray = new byte[10000];
                int bytesRead, totalBytesRead = 0;
                do
                {
                    bytesRead = fileStream.Read(bytearray, 0, bytearray.Length);
                    totalBytesRead += bytesRead;
                } while (bytesRead > 0);

                fileToupload.Write(bytearray, 0, bytearray.Length);
                fileToupload.Close();
                fileToupload.Dispose();
            }
            catch (Exception ex) { throw new Exception(ex.Message); }
            return true;
        }
    }
}

REST project:

[WebInvoke(UriTemplate = "AddStream/{filename}", Method = "POST", BodyStyle = WebMessageBodyStyle.Bare)]
public bool AddStream(string filename, System.IO.Stream fileStream)
{
    LogicClass.FileComponent rest = new LogicClass.FileComponent();
    return rest.AddStream(filename, fileStream);
}

Windows Form project: for testing

private void button24_Click(object sender, EventArgs e)
{
    byte[] fileStream;
    using (FileStream fs = new FileStream("E:\\stream.txt", FileMode.Open, FileAccess.Read, FileShare.Read))
    {
        fileStream = new byte[fs.Length];
        fs.Read(fileStream, 0, (int)fs.Length);
        fs.Close();
        fs.Dispose();
    }

    string baseAddress = "http://localhost:3446/File/AddStream/stream.txt";
    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(baseAddress);
    request.Method = "POST";
    request.ContentType = "text/plain";
    Stream serverStream = request.GetRequestStream();
    serverStream.Write(fileStream, 0, fileStream.Length);
    serverStream.Close();
    using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
    {
        int statusCode = (int)response.StatusCode;
        StreamReader reader = new StreamReader(response.GetResponseStream());
    }
}

I've turned off the firewall and my Internet connection, but the error still exists. Is there a better way of testing the uploading method?

Stack trace:

at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)

Answer 1

Check whether the port number in file Web.config of your webpage is the same as the one that is hosted on IIS.

Answer 2

I got a similar error message like TCP error code 10061: No connection could be made because the target machine actively refused it in my current project. I find this 10061 error code cannot distinguish the case that the service endpoint is not started and the case that it is blocked by the firewall. Often, the firewall can be switched off, but the problem is still there.

You can test your code in the below two ways.

1. Insert code to get time A that service is started and time B that client sends the request to the server. If B is earlier than A, it can cause this problem.
2. Change your server port to another port that is also available in the system. You will find the same error code reported.

Above is my fix. It works on my machine. I hope it helps!