MARKUS

using System;

using System.Net.Http;

using System.Text;

using System.Threading.Tasks;

namespace KCOM.Common

{

    public class Commons

    {

        public static string ShortGuid()

        {

            char[] chars = "ABCDEF1234567890".ToCharArray();

            byte[] data = new byte[1];

            System.Security.Cryptography.RNGCryptoServiceProvider crypto = new System.Security.Cryptography.RNGCryptoServiceProvider();

            crypto.GetNonZeroBytes(data);

            data = new byte[32];

            crypto.GetNonZeroBytes(data);

            StringBuilder result = new StringBuilder(32);

            foreach (byte b in data)

            {

                result.Append(chars[b % (chars.Length - 1)]);

            }

            return result.ToString();

        }

        //강인구 추가 

        public static string ShortFileKey()

        {

            //byte[] bytes = new byte[3];

            //using (var provider = System.IO.Path.GetRandomFileName())

            //{

            //    provider.GetBytes(bytes);

            //}

            return System.IO.Path.GetRandomFileName();

        }

        /// <summary>

        /// url의 파일이 존재하는지 검사하여 결과를 리턴한다.

        /// </summary>

        /// <param name="url"></param>

        /// <returns></returns>

        public static async Task<bool> DoesFileExist(string url)

        {

            using (HttpClient client = new HttpClient())

            {

                var restponse = await client.GetAsync(url);

                return restponse.StatusCode == System.Net.HttpStatusCode.OK;

            }

        }

    }

}