using System;

using System.Net;

using System.Security.Cryptography;

using System.Text;

using System.Text.RegularExpressions;

using RestSharp;

public class Program

{

    private static readonly Encoding encoding = Encoding.UTF8;

    private static string format = "XML"; //XML, JSON

    private static string userId = "rcondomina@bizlogit.net";

    private static string apiKey = "b7b2a60ba4ecc17739a0172a9b2ae7be975e9b71";

    private static string version = "1.0";

    public static void Main()

    {

        string action = "SetStatusToPackedByMarketplace";

        string deliveryType = "dropship";

        string orderItemIds = "1234,5678"; // prueba

        string shippingProvider = "";

        string timeStamp = DateTime.Now.ToString("yyyy-MM-dd") + DateTime.Now.ToString("THH") + DateTime.Now.ToString(":mm") + DateTime.Now.ToString(":ss");

        string requestParams = "Action=" + action +

            "&DeliveryType=" + deliveryType +

            "&Format=" + format +

            "&OrderItemIds=[" + orderItemIds +

            "]&ShippingProvider=" + shippingProvider +

            "&Timestamp=" + timeStamp +

            "&UserID=" + userId +

            "&Version=" + version;

        // Encode for url and replace needed characters

        string escapedSignature = WebUtility.UrlEncode(requestParams);

        escapedSignature = Regex.Replace(escapedSignature, "(%[0-9a-f]{2})", c => c.Value.ToLowerInvariant());

        escapedSignature = Regex.Replace(escapedSignature, "(%3d|%3D)", c => "=");

        escapedSignature = Regex.Replace(escapedSignature, "(%26)", c => "&");

        string signature = GetSignature(escapedSignature);

​

        // URL for the request

        var url = string.Format("https://sellercenter-api.dafiti.com.ar/?{0}&Signature={1}", requestParams, signature);

        // Send request

        try {

            RestRequest request = new RestRequest(Method.GET);

            RestClient client = new RestClient(url);

            string response = client.Execute(request).Content;

            Console.WriteLine(response);

        } catch (Exception e) {

            Console.WriteLine(e.ToString());

        }

    }

    static string GetSignature(string escapedSignature)

    {

        // Generate hash 

        var keyByte = encoding.GetBytes(apiKey);

        string generatedSignature;

        using (var hmacsha256 = new HMACSHA256(keyByte)) {

            hmacsha256.ComputeHash(encoding.GetBytes(escapedSignature));

            generatedSignature = ByteToString(hmacsha256.Hash).ToLower();

        }

        return generatedSignature;

    }

    // Convert bytes to string 

    static string ByteToString(byte[] buff)

    {

        string sbinary = "";

        for (int i = 0; i < buff.Length; i++)

            sbinary += buff[i].ToString("X2"); // hex

        return sbinary;

    }

}