使用該 URL http://localhost/WebApplicationX/WebForm1.aspx 在 Flashget 中下載
切換 暫停/開始 , 並增加下載的塊數 測試!
原理參見上一篇 blog JSP/Servlet 實現版:
http://blog.csdn.net/playyuer/archive/2004/07/30/56538.aspx
利用該原理不難實現支援資料庫大欄位的斷點續傳多線程連結的下載!
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
public class WebForm1 : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
string s = @"e:/northwind.mdb";
s = @"I://SetupRes//Sun//j2re-1_4_2_05-windows-i586-p.exe";
System.IO.Stream S = new System.IO.FileStream(s, System.IO.FileMode.Open, System.IO.FileAccess.Read,System.IO.FileShare.Read);
long p = 0;
long l = new System.IO.FileInfo(s).Length;
if (Request.Headers["Range"] != null)
{
Response.StatusCode = 206;
p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));
}
Response.AddHeader("Content-Length", ((long)(l - p)).ToString() );
if (p != 0)
{
//不是從最開始下載,
//響應的格式是:
//Content-Range: bytes [檔案塊的開始位元組]-[檔案的總大小 - 1]/[檔案的總大小]
Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(l - p)).ToString() + "/" + l.ToString());
}
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + System.IO.Path.GetFileName(s));
S.Position = p;
int i = 1;
byte[] b = new Byte[1024];
while (i > 0)
{
i = S.Read(b, 0, b.Length);
Response.OutputStream.Write(b, 0, i);
}
S.Close();
Response.End();
}
#region Web Form設計器產生的程式碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 該調用是 ASP.NET Web Form設計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
///
/// 設計器支援所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
///
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}