文件写入文件分布式系统(asp.net C#)

 public JsonResult HandleImgUpload(User user, System.Web.HttpPostedFileBase fileData, long shopId = )
         {
              try
             {
                  System.Drawing.Image img = System.Drawing.Image.FromStream(fileData.InputStream);
                  if (img.Height <=  && img.Width <= )
                  {
                      // 设置参数
                      HttpWebRequest request = WebRequest.Create(Settings.GetSettingByKey("uploadUrl_img") + user.UserID) as HttpWebRequest;
                      CookieContainer cookieContainer = new CookieContainer();
                      request.CookieContainer = cookieContainer;
                      request.AllowAutoRedirect = true;
                      request.Method = "POST";

                      string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
                      request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
                      byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
                      byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");

                      //请求头部信息
                      StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileData.FileName));
                      byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());

                      byte[] bytes = new byte[fileData.InputStream.Length];
                      fileData.InputStream.Seek(, SeekOrigin.Begin);
                      fileData.InputStream.Read(bytes, , bytes.Length);

                      Stream postStream = request.GetRequestStream();
                      postStream.Write(itemBoundaryBytes, , itemBoundaryBytes.Length);
                      postStream.Write(postHeaderBytes, , postHeaderBytes.Length);
                      postStream.Write(bytes, , bytes.Length);
                      postStream.Write(endBoundaryBytes, , endBoundaryBytes.Length);
                      postStream.Close();
                      //发送请求并获取相应回应数据
                      HttpWebResponse response = request.GetResponse() as HttpWebResponse;
                      //直到request.GetResponse()程序才开始向目标网页发送Post请求
                      Stream instream = response.GetResponseStream();
                      StreamReader sr = new StreamReader(instream, Encoding.UTF8);
                      //返回结果网页（html）代码
                      string content = sr.ReadToEnd();
                      var info = Newtonsoft.Json.JsonConvert.DeserializeObject<UploadFileResult>(content);

                      if (info.Result ==  && info.Info != null)
                      {
                          return Json(new { error = , url = info.Info.Url }, JsonRequestBehavior.AllowGet);
                      }
                      else
                      {
                          return Json(new { error = , message = info.Msg }, JsonRequestBehavior.AllowGet);
                      }
                  }
                  else
                  {
                      return Json(new { error = , message = "文件尺寸超过限制(高：800，宽：600)" }, JsonRequestBehavior.AllowGet);
                  }
             }
             catch
             {
                 return Json(new { error = , message = "上传失败" }, JsonRequestBehavior.AllowGet);
             }
         }

   class UploadFileResult
     {
         public int Result { set; get; }
         public int ErrorCode { set; get; }
         public string Msg { set; get; }
         public UploadFileResultInfo Info { set; get; }
     }

     class UploadFileResultInfo
     {
         public string FileName { set; get; }
         public string Surfix { set; get; }
         public string Url { set; get; }
         public long FileSize { set; get; }

     }