/* ==============================================================================
 * 功能描述：PutFlieContent  
 * 创 建 者：Garrett
 * 创建日期：2019/9/16 19:24:43
 * ==============================================================================*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace PackageUploader.Http
{
    /// <summary>
    /// PutFlieContent
    /// </summary>
    class PutFlieContent : FileContent
    {
        private string m_Url;
        private Stream m_Stream;
        public PutFlieContent(string url, Stream stream)
        {
            m_Url = url;
            m_Stream = stream;
        }
        /// <summary>
        /// 上传文件
        /// </summary>
        /// <returns></returns>
        public virtual string PutContent()
        {
            var url = m_Url;
            var stream = m_Stream;
            if (stream == null)
                throw new ArgumentNullException(nameof(stream));
            var responseValue = string.Empty;
            HttpWebRequest request = null;
            try
            {
                var totalLength = stream.Length;
                request = (HttpWebRequest)WebRequest.Create(url);
                request.KeepAlive = true;
                request.Timeout = Timeout;
                request.Method = "POST";
                request.ContentLength = totalLength;
                request.ContentType = "multipart/form-data; ";
                #region 请求数据

                byte[] buffer = new byte[BufferLength];

                var transLength = 0;
                using (BinaryReader r = new BinaryReader(stream))
                {
                    Stream postStream = request.GetRequestStream();
                    try
                    {
                        int size = 0;
                        do
                        {
                            size = r.Read(buffer, 0, buffer.Length);
                            postStream.Write(buffer, 0, size);
                            transLength += size;

                            #region 调用事件

                            StreamProgressArgs args = new StreamProgressArgs(size, transLength, totalLength);
                            args.TransCompleted = (size == (long)0);
                            TransferProgress?.Invoke(this, args);

                            #endregion
                        } while (size > 0);
                    }
                    finally
                    {
                        postStream?.Close();
                    }
                }

                #endregion

                #region 相应数据

                //返回数据
                using (var response = (HttpWebResponse)request.GetResponse())
                {
                    if (response.StatusCode != HttpStatusCode.OK)
                    {
                        var message = String.Format("请求失败. 获得http状态 {0}", response.StatusCode);
                        throw new ApplicationException(message);
                    }

                    using (var responseStream = response.GetResponseStream())
                    {
                        if (responseStream != null)

                            using (var reader = new StreamReader(responseStream))
                            {
                                responseValue = reader.ReadToEnd();
                            }
                    }
                }

                #endregion
            }
            catch (Exception e)
            {
                throw;
            }
            finally
            {
                //request?.dis
            }
            return responseValue;
        }
    }
}