迅雷，快車，旋風鏈接編碼解碼C#源代碼

這篇是我之前做項目時用到的，寫了個小demo，發在原來的一個博客裏。因爲博客空間在國外經常被牆，今天把之前寫的一些東西搬到這裏來。

迅雷，快車旋風鏈接編碼解碼C#源代碼

在做一個項目時，有要求用到下載工具下載，於是上網找了找，找到了這些鏈接的加密規則，自己寫了幾個轉換方法

寫的有點急，可能不太完善，若您在使用中發現問題，煩請留言給我指出，謝謝！

using System;
using System.Text;
/*
 * Author:大寶http://dabao.im,http://dabao2010.blog.51cto.com
 * Desc:迅雷，快車，旋風鏈接編碼解碼
 */
namespace Base64Url
{
class Program
{
        #region 靜態常量
/// <summary>迅雷 thunder://</summary>
publicconststring _thunder = "Thunder://";
/// <summary>快車 flashget://</summary>
publicconststring _flashget = "Flashget://";
/// <summary>QQ旋風 qqdl://</summary>
publicconststring _qqdl = "Qqdl://";
        #endregion
staticvoid Main(string[] args)
{
string url = "";
url = "thunder://QUFmdHA6Ly82OjZAZnRwLjY2eXMub3JnOjQ1MDgv44CQ6L+F6Zu35LiL6L29d3d3LmR5MTMxLmNvbeOAkVjmiJjorabliY3kvKDvvJrph5HliJrni7xCROS4reiLseWPjOWtlzEyODDpq5jmuIUucm12Ylpa";
//url = "Flashget://W0ZMQVNIR0VUXWh0dHA6Ly9ibG9nLnhpYW9odW9jaGFpLm5ldFtGTEFTSEdFVF0=&xiaohuochai";
//url="Qqdl://aHR0cDovL2Jsb2cueGlhb2h1b2NoYWkubmV0";
string url2 = "http://xiaohuochai.net";
string thunder = "";
string flashget = "";
string qqdl = "";
//編碼
thunder = EncodeUrlToBase64(url2, LinkType.Thunder);
flashget = EncodeUrlToBase64(url2, LinkType.Flashget);
qqdl = EncodeUrlToBase64(url2, LinkType.Qqdl);
Console.Write(thunder + "\r\n" + flashget + "\r\n" + qqdl + "\r\n");
//解碼
string result = "您輸入的地址可能不是迅雷，快車，旋風中的任何一種！";
if (url.StartsWith(_thunder, true, null))//迅雷
result = DecodeUrlFromBase64(url.Remove(0, _thunder.Length), LinkType.Thunder);
if (url.StartsWith(_flashget, true, null))//快車
result = DecodeUrlFromBase64(url.Remove(0, _flashget.Length), LinkType.Flashget);
if (url.StartsWith(_qqdl, true, null))//QQ旋風
result = DecodeUrlFromBase64(url.Remove(0, _qqdl.Length), LinkType.Qqdl);
Console.Write(result);
Console.ReadLine();
}
        #region 編碼&解碼
        #region 編碼
/// <summary>
/// 編碼URL
/// </summary>
/// <param name="url">原生URL</param>
protectedstaticstring EncodeUrlToBase64(string url, LinkType linktype)
{
string enurl = "";
string tempUrl = "";
switch (linktype)
{
case LinkType.Thunder:
tempUrl = "AA" + url + "ZZ";
enurl = _thunder + EnCodeUrl(tempUrl);
break;
case LinkType.Flashget:
tempUrl = "[FLASHGET]" + url + "[FLASHGET]";
enurl = _flashget + EnCodeUrl(tempUrl) + "&xiaohuochai";//&後爲用戶自定義信息，具體什麼用還不清楚
break;
case LinkType.Qqdl:
enurl = _qqdl + EnCodeUrl(url);
break;
default:
break;
}
return enurl;
}
privatestaticstring EnCodeUrl(string tempUrl)
{
byte[] bytes; string enurl;
bytes = Encoding.Default.GetBytes(tempUrl);
enurl = Convert.ToBase64String(bytes);
return enurl;
}
        #endregion
        #region 解碼
/// <summary>
/// 鏈接解碼
/// </summary>
/// <param name="baseurl">鏈接</param>
protectedstaticstring DecodeUrlFromBase64(string baseurl, LinkType linktype)
{
string deurl = "";
switch (linktype)
{
case LinkType.Thunder:
deurl = DecodeUrl(baseurl);
deurl = deurl.Remove(0, 2);
deurl = deurl.Remove(deurl.Length - 2);
break;
case LinkType.Flashget:
deurl = DecodeUrl(baseurl.Remove(baseurl.LastIndexOf('&')));
deurl = deurl.Remove(0, 10);
deurl = deurl.Remove(deurl.Length - 10);
break;
case LinkType.Qqdl:
deurl = DecodeUrl(baseurl);
break;
default:
break;
}
return deurl;
}
privatestaticstring DecodeUrl(string baseurl)
{
byte[] bytes;
string deurl;
bytes = Convert.FromBase64String(baseurl);
deurl = Encoding.UTF8.GetString(bytes);
return deurl;
}
        #endregion
        #endregion
}
/// <summary>
/// 鏈接類型
/// </summary>
enum LinkType
{
/// <summary>迅雷</summary>
Thunder,
/// <summary>快車</summary>
Flashget,
/// <summary>QQ旋風</summary>
Qqdl
}
}