Transferring to ftp site using HttpWebRequest

Question

I'm trying to transfer an Excel file to an sftp site and my code executes properly, but I do not see the file on the site.

private static void SendFile(string FileName)
{
    FileStream rdr = new FileStream(FileName + ".csv", FileMode.Open);
    HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://sftp.somesite.com");
    HttpWebResponse resp;
    req.Method = "Post";
    req.Credentials = new NetworkCredential("UN", "PW", "Domain");

    req.ContentLength = rdr.Length;
    req.AllowWriteStreamBuffering = true;
    Stream reqStream = req.GetRequestStream();
    byte[] inData = new byte[rdr.Length];
    int bytesRead = rdr.Read(inData, 0, Convert.ToInt32(rdr.Length));

    reqStream.Write(inData, 0, Convert.ToInt32(rdr.Length));
    rdr.Close();
}

What am I doing wrong in the code above?

Answer 1

Why don't you use FtpWebRequest instead?

using System.Net;
using System.IO;

public class Ftp
{
  private static void ftpUpload(string filename, string destinationURI)
  {
        FileInfo fileInfo = new FileInfo(filename);
        FtpWebRequest reqFTP = CreateFtpRequest(new Uri(destinationURI));

        reqFTP.KeepAlive = false;

        // Specify the command to be executed.
        reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

        // use binary 
        reqFTP.UseBinary = true;

        reqFTP.ContentLength = fileInfo.Length;

        // Buffer size set to 2kb
        const int buffLength = 2048;
        byte[] buff = new byte[buffLength];

        // Stream to which the file to be upload is written
        Stream strm = reqFTP.GetRequestStream();

        FileStream fs = fileInfo.OpenRead();

        // Read from the file stream 2kb at a time
        int cLen = fs.Read(buff, 0, buffLength);

        // Do a while till the stream ends
        while (cLen != 0)
        {
            // FTP Upload Stream
            strm.Write(buff, 0, cLen);
            cLen = fs.Read(buff, 0, buffLength);
        }

        // Close 
        strm.Close();
        fs.Close();
   }
 }

Answer 2

1. Post doesn't put files. It sends data to server-side scripts.
2. Is that the complete URL? Domain name prepended with "http://" doesn't make a valid URI, which must include a path and the name of the resource.
3. "sftp" in the URL might suggest that SSH File Transfer Protocol (SFTP) must be used, and not FTP or HTTP
4. Who said that uploading to the FTP resource would work this way?

Answer 3

As Eugene said in #3

When you say "SFTP" do you mean FTP over SSL or SSH File Transfer Protocol. They require different approaches. IF you are indeed using SFTP, as in SSH File Transfer, I think you'd be better off using a third party library (if you can) like sharpSSH.(http://sshnet.codeplex.com/ )

Wiki on SFTP - http://en.wikipedia.org/wiki/SSH_File_Transfer_Protocol