using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.Net;
using System.IO;
 
namespace ConsoleApplication1
{
    class Program
    {
        private static string GetMd5Hash(string input)
        {
            MD5 md5Hasher = new MD5CryptoServiceProvider();
            byte[] computedHashBytes = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
            StringBuilder sBuilder = new StringBuilder();
            for (int i = 0; i < computedHashBytes.Length; i++)
            {
                sBuilder.Append(computedHashBytes[i].ToString("x2"));
            }
            return sBuilder.ToString();
        }
        private static string GetTimeStamp()
        {
            DateTime beginUTC = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
            DateTime nowUTC = DateTime.UtcNow;
            TimeSpan elapsedSpanUTC = nowUTC.Subtract(beginUTC);
            return ((long)elapsedSpanUTC.TotalMilliseconds).ToString();
        }
        private static string GetSig(string HTTPmethod, string requestURI, string timeStamp)
        {
            string myAppId = "YOUR_APPID_HERE";
            string mySecret = "YOUR_SECRET_HERE";
            StringBuilder buff = new StringBuilder();
            buff.Append(myAppId).Append("\n");
            buff.Append(HTTPmethod).Append("\n");
            buff.Append(mySecret).Append("\n");
            buff.Append(timeStamp).Append("\n");
            buff.Append(requestURI).Append("\n");
            String src = buff.ToString().ToLower();
            return GetMd5Hash(src);
        }
        private static void GetData()
        {
            HttpWebResponse httpWebResponse = null;
            StreamReader streamReader = null;
            StreamWriter streamWriter = null;
            try
            {
                string timeStamp = GetTimeStamp();
                string webQuery = string.Format("http://apiv1.cruvee.com/search/wines/all?appId=YOUR_APPID_HERE&sig={0}&timestamp={1}&fmt=html&page=1&rpp=10,", GetSig("GET", "/search/wines/all", timeStamp), timeStamp);
                HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(webQuery);
                httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                // Get the stream associated with the response.
                Stream responseStream = httpWebResponse.GetResponseStream();
                // Pipes the stream to a higher level stream reader with the required encoding format. 
                streamReader = new StreamReader(responseStream, Encoding.UTF8);
                streamWriter = new StreamWriter(@"c:\temp\cruvee_wines_page1.html");
                streamWriter.Write(streamReader.ReadToEnd());
                Console.WriteLine("File c:\\temp\\cruvee_wines_page1.html created.");
            }
            catch (Exception exception)
            {
                Console.WriteLine(exception.ToString());
            }
            finally
            {
                if (streamWriter != null) streamWriter.Close();
                if (httpWebResponse != null) httpWebResponse.Close();
                if (streamReader != null) streamReader.Close();
            }
            Console.WriteLine("Press a key to exit...");
            Console.ReadKey();
        }
 
        static void Main(string[] args)
        {
            GetData();
        }
    }
}