Question

I have this method to transfer files using a FTP Server:

private void TransferNeededFiles(IEnumerable<string> filenames)
{
    foreach (var filename in filenames)
    {
        var request = WebRequest.Create(new Uri(@"ftp://{0}/{1}".Fill(Config.ServerUri, filename))) as FtpWebRequest;

        if (request != null)
        {
            request.Credentials = new NetworkCredential(Config.Username, Config.Password);

            request.Method = WebRequestMethods.Ftp.DownloadFile;
            using (var streamReader = new StreamReader(request.GetResponse().GetResponseStream()))
            {
                var fileStream = new FileStream(@"{0}/{1}".Fill(Config.DestinationFolderPath, filename), FileMode.Create);

                var writer = new StreamWriter(fileStream);
                writer.Write(streamReader.ReadToEnd());
                writer.Flush();
                writer.Close();

                fileStream.Close();
            }
        }
    }
}

A .gz file, included in the list of filenames, is always corrupted. When I try to copy from ftp using windows explorer, the file is not corrupted. Do you know what is happening?

Answer 1

The problem is this line:

writer.Write(streamReader.ReadToEnd());

StreamReader.ReadToEnd() returns a Unicode encoded string. You want something that will read the stream byte for byte.