using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.SessionState;
using Business = SuperMap.RealEstate.Coop.Merchant.Business;

namespace Coop.Merchant.Handler
{
    /// <summary>
    /// Filehelper 的摘要说明
    /// </summary>
    public class Filehelper : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            string action_type = string.Empty;
            string action_data = string.Empty;
            if(HttpContext.Current.Request.HttpMethod == "GET")
            {
                action_type = HttpContext.Current.Request.QueryString["action_type"];
                action_data = HttpContext.Current.Request.QueryString["action_data"];
            }
            else
            {
                 action_type = HttpContext.Current.Request.Form["action_type"];
                action_data = HttpContext.Current.Request.Form["action_data"];
            }
            //文件操作

            action_data = "24".ToEncrypt();
            string RetString = string.Empty;
            SuperMap.RealEstate.ServiceModel.Transaction _Transaction = new SuperMap.RealEstate.ServiceModel.Transaction();
            Business.IMAGE _IMAGE = new Business.IMAGE(_Transaction);

            switch (action_type)
            {
                case "downloadfile":
                    #region 下载文件
                    _IMAGE.ResetProperty();
                    _IMAGE.AddSearchParameter("IMAGE_ID", action_data.ToDecrypt());
                    if (_IMAGE.Search())
                    {
                        string uploadPath = HttpContext.Current.Server.MapPath("~/UploadImageDir/PROINST/") + _IMAGE.IMAGE_CONTENT;
                        if (!System.IO.File.Exists(uploadPath))
                        {
                            context.Response.Write("error:服务器上该文件已被删除或不存在！");
                            return;
                        }

                        context.Response.Clear();
                        context.Response.Buffer = true;
                        context.Response.Charset = "utf-8";
                        context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");//设置输出流为简体中文   
                        context.Response.AddHeader("Content-Disposition", string.Format("attachment; filename=" +
                            (!string.IsNullOrEmpty(_IMAGE.IMAGE_TITLE) ? _IMAGE.IMAGE_TITLE : _IMAGE.IMAGE_CONTENT),
                            DateTime.Now.ToString("yyyyMMddHHmmssfff")));
                        context.Response.AddHeader("Content-length", System.IO.File.ReadAllBytes(uploadPath).Length.ToString());
                        //context.Response.BinaryWrite(System.IO.File.ReadAllBytes(uploadPath));

                        System.IO.FileInfo lFileInfo = new System.IO.FileInfo(uploadPath);
                        context.Response.WriteFile(lFileInfo.FullName);
                        context.Response.ContentType = "application/octet-stream";//设置输出文件类型为excel文件。
                        context.Response.Flush();
                        context.Response.End();
                    }
                    #endregion
                    break;
                case "deletefilebycode":
                    _IMAGE.ResetProperty();
                    _IMAGE.AddSearchParameter("IMAGE_ID", action_data.ToDecrypt());
                    if (_IMAGE.Search())
                    {
                        _IMAGE.Delete();
                        RetString = "1";
                    }
                    break;
            }
            _Transaction.AutoCommit();
            context.Response.ContentType = "text/plain";
            context.Response.Write(RetString);
            context.Response.End();
        }


        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}