urlbox c#

urlbox.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;

public class Urlbox
{
  public string urlGenerator(string url)
  {
    var urlboxApiKey = "xxx-xxx";
    var urlboxApiSecret = "xxx-xxx";

    var encodedUrl = System.Uri.EscapeDataString(url);
    byte[] key = Encoding.UTF8.GetBytes(urlboxApiSecret);

    var queryString = string.Format("url={0}", encodedUrl);
    var uniqueHash = generateHash(queryString, key);
    return string.Format("https://api.urlbox.io/v1/{0}/{1}/png?{2}", urlboxApiKey, uniqueHash, queryString );
   }
  
   public static string generateHash(string input, byte[] key)
   {
     HMACSHA1 myhmacsha1 = new HMACSHA1(key);
     byte[] byteArray = Encoding.UTF8.GetBytes(input);
     MemoryStream stream = new MemoryStream(byteArray);
     return myhmacsha1.ComputeHash(stream).Aggregate("", (s, e) => s + String.Format("{0:x2}", e), s => s);
   }
}