Upload / Download via HTTPS

HttpClient

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;

public class HTTPClient
{
    private string url = null;
    private string username = null;
    private string password = null;
    /* Construct Object */
    public HTTPClient(
        string hostIP,
        string userName,
        string Password)
    {
        url = hostIP;
        username = userName;
        password = Password;
    }


    public void LoginAndUpload(string localfile)
    {

        WebClient wc = new WebClient();
        using (var client = new CookieAwareWebClient())
        {
            var values = new NameValueCollection
            {
                { "start-url", @"/~" },
                { "user", username },
                { "password", password },
                { "switch", "Log In" },
            };
            client.UploadValues("https://sdfiltran.adp.com/login", values);
            // If the previous call succeeded we now have a valid authentication cookie
            // so we could download the protected page

            var upload_values = new NameValueCollection
            {
                { "SUBMIT", "Upload File" },
            };

            // HttpUploadFile("https://sdfiltran.adp.com/?T", @"d:\AEGISDOWNLOAD.csv", "file", "application/vnd.ms-excel", upload_values, client.CookieContainer);
            HttpUploadFile(url + "/?T", localfile, "file", "text/html", upload_values, client.CookieContainer);
        }
        //wc.UploadFile(url, "post", file);
    }

    public void LoginAndDownload(string remote_file, string local_file)
    {
        try
        {
            WebClient wc = new WebClient();
            using (var client = new CookieAwareWebClient())
            {
                var values = new NameValueCollection
            {
                { "start-url", @"/~" },
                //{ "user", "yt4_etime" },
                //{ "password", "Aegis-66x" },
                  { "user", username },
                { "password", password },
                { "switch", "Log In" },
            };
                client.UploadValues("https://sdfiltran.adp.com/login", values);
                // If the previous call succeeded we now have a valid authentication cookie
                // so we could download the protected page
                //client.DownloadFile("https://sdfiltran.adp.com/aegisimport.csv?B", @"d:\AEGISDOWNLOAD.csv");
                client.DownloadFile(url + @"/" + remote_file + "?B", local_file);
                int i = 0;
            }
        }
        catch (Exception ex)
        {

        }

    }

    private class CookieAwareWebClient : WebClient
    {
        public CookieAwareWebClient()
            : this(new CookieContainer())
        { }
        public CookieAwareWebClient(CookieContainer c)
        {
            this.CookieContainer = c;
        }
        public CookieContainer CookieContainer { get; set; }

        protected override WebRequest GetWebRequest(Uri address)
        {
            WebRequest request = base.GetWebRequest(address);

            var castRequest = request as HttpWebRequest;
            if (castRequest != null)
            {
                castRequest.CookieContainer = this.CookieContainer;
            }

            return request;
        }
    }

    public void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc, CookieContainer cookies)
    {


        string user = "yt4_etime";
        string password = "Aegis-66x";
        Debug.WriteLine(string.Format("Uploading {0} to {1}", file, url));
        string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
        byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");

        HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);

        wr.ContentType = "multipart/form-data; boundary=" + boundary;
        wr.Method = "POST";
        wr.KeepAlive = true;
        wr.CookieContainer = cookies;
        //wr.PreAuthenticate = true;
        //wr.Credentials = new NetworkCredential(user, password, "https://sdfiltran.adp.com");
        //using (StreamWriter writer = new StreamWriter(wr.GetRequestStream(), Encoding.ASCII))
        //{
        //    writer.Write("user=" + user + "&password=" + password);
        //}

        Stream rs = wr.GetRequestStream();

        string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\r{1}";
        foreach (string key in nvc.Keys)
        {
            rs.Write(boundarybytes, 0, boundarybytes.Length);
            string formitem = string.Format(formdataTemplate, key, nvc[key]);
            byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            rs.Write(formitembytes, 0, formitembytes.Length);
        }
        rs.Write(boundarybytes, 0, boundarybytes.Length);

        string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\r";
        string header = string.Format(headerTemplate, paramName, file, contentType);
        byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
        rs.Write(headerbytes, 0, headerbytes.Length);

        FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
        byte[] buffer = new byte[4096];
        int bytesRead = 0;
        while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
        {
            rs.Write(buffer, 0, bytesRead);
        }
        fileStream.Close();

        byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r--" + boundary + "--\r");
        rs.Write(trailer, 0, trailer.Length);
        rs.Close();

        WebResponse wresp = null;
        try
        {
            wresp = wr.GetResponse();
            Stream stream2 = wresp.GetResponseStream();
            StreamReader reader2 = new StreamReader(stream2);
            Debug.WriteLine(string.Format("File uploaded, server response is: {0}", reader2.ReadToEnd()));
        }
        catch (Exception ex)
        {
            Debug.WriteLine("Error uploading file", ex);
            if (wresp != null)
            {
                wresp.Close();
                wresp = null;
            }
        }
        finally
        {
            wr = null;
        }
    }

}