using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Work._29Tools.BLL
{
    public class HttpResponseBLL
    {

        public static string ReadResponse(HttpWebResponse response, Encoding encoding = null)
        {
            using (Stream responseStream = response.GetResponseStream())
            {
                Stream streamToRead = responseStream;
                if (response.ContentEncoding.ToLower().Contains("gzip"))
                {
                    streamToRead = new GZipStream(streamToRead, CompressionMode.Decompress);
                }
                else if (response.ContentEncoding.ToLower().Contains("deflate"))
                {
                    streamToRead = new DeflateStream(streamToRead, CompressionMode.Decompress);
                }
                if (encoding == null) encoding = Encoding.UTF8;
                using (StreamReader streamReader = new StreamReader(streamToRead, encoding))
                {
                    return streamReader.ReadToEnd();
                }
            }
        }
        public static void WriteMultipartBodyToRequest(HttpWebRequest request, string body)
        {
            string[] multiparts = Regex.Split(body, @"<!>");
            byte[] bytes;
            using (MemoryStream ms = new MemoryStream())
            {
                foreach (string part in multiparts)
                {
                    if (File.Exists(part))
                    {
                        bytes = File.ReadAllBytes(part);
                    }
                    else
                    {
                        bytes = System.Text.Encoding.UTF8.GetBytes(part.Replace("\r\n", "\n").Replace("\r", "\n").Replace("\n", "\r\n"));
                    }

                    ms.Write(bytes, 0, bytes.Length);
                }

                request.ContentLength = ms.Length;
                using (Stream stream = request.GetRequestStream())
                {
                    ms.WriteTo(stream);
                }
            }
        }
    }
}