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C#实现土豆优酷等网站视频的缩略图

2012-03-27 16:01 387 查看
  第一次写博客,心里有点小激动!前一段时间做一个ASP.NET网站时涉及到发布视频的功能。这个功能要求给一个连接地址,然后生成视频缩略图,并提供播放功能!

  我是从百度找到谷歌都没有找到好的解决方案,包括CSDN上面提供一些案例代码,下载下来全是忽悠人,赚取我的积分啊!坑爹呀!你妹呀!好了,现在开始介绍我自己在优酷和土豆地址中找到的一些规律,做出的一点点东西!可能不是很全!

发布视频的时候可以发布视频的网页地址(.html),也可以发布视频(.swf)地址

  优酷视频:

  第一种情况: 

  http://v.youku.com/v_show/id_XMzY3NzExNjgw.html

  http://player.youku.com/player.php/sid/XMzY3NzExNjgw/v.swf

  第二种情况:

  http://v.youku.com/v_playlist/f17213424o1p0.html      

  http://player.youku.com/player.php/Type/Folder/Fid/17213424/Ob/1/Pt/0/sid/XMzE2MzI5MDMy/v.swf

重要的一个地址:http://v.youku.com/player/getPlayList/VideoIDS/{0}/version/5/source/out?onData=%5Btype%20Function%5D&n=3 此地址是获取视频缩略图的!我们可以模仿http请求该地址获取存有缩略图的源文件!其中{0}是参数,该参数是从.swf视频地址中获取的。比如以上第一种情况中XMzY3NzExNjgw或者是第二中情况中XMzE2MzI5MDMy都是视频的唯一标识值。以下分析图



给出优酷网页地址:

//根据输入的网页地址截取出唯一id,根据id拼出视频地址
string hyouKuVideoUrlById = "http://player.youku.com/player.php/sid/{0}/v.swf";
//根据视频地址提供的唯一id,请求出缩略图所在地址  string syouKuPicUrlById = "http://v.youku.com/player/getPlayList/VideoIDS/{0}/version/5/source/out?onData=%5Btype%20Function%5D&n=3";
string htmlRegxStr = "id=\"link[0-9]+\"[ ]+value=\"http://([\\w]+[.])+[/.\\w_]+";

public override string[] GetVideoInfo(string url)
{
Result[0] = url;
string videoName = GetVideoIdFromUrl(url);

#region //http://v.youku.com/v_show/id_XMjkwMzAwMzY4.html
if (videoName.ToLower().StartsWith("id_"))
{

videoName = videoName.Trim().Remove(0, 3);
Result[1] = CombineStr(hyouKuVideoUrlById, videoName);
Result[2] = GetSomething(
GetResultFromUrl(CombineStr(syouKuPicUrlById, videoName)).Replace(@"\/", "/"),
imgLinkRegxStr
);//"(http://[^\"]+)[\\w\\W]+\"title\":\"([^\"]+)\""
}
#endregion

#region //http://v.youku.com/v_playlist/f17213424o1p0.html
else if (videoName.ToLower().StartsWith("f"))
{
string info = GetResultFromUrl(url);
MatchCollection cc = GetSomethingCollection(info, htmlRegxStr);

for (int i = 0; i < cc.Count; i++)
{
Result[1] = GetSomething(cc[i].Value, hypeLinkRegxStr);
if (Result[1].ToLower().EndsWith(".swf"))
{
break;
}
}
if (Result[1] != "")
{
string getIed = GetVideoId(Result[1], '/', 1);
if (getIed != "")
{
Result[2] = GetSomething(GetResultFromUrl(CombineStr(syouKuPicUrlById, getIed)).Replace(@"\/", "/"), imgLinkRegxStr);
}
}
}
#endregion

#region else
else
{
//扩展其他情况:
}
#endregion

return Result;
}

给出优酷视频地址:

//根据视频地址提供的唯一id,请求出缩略图所在地址
string syouKuPicUrlById = "http://v.youku.com/player/getPlayList/VideoIDS/{0}/version/5/source/out?onData=%5Btype%20Function%5D&n=3";
public override string[] GetVideoInfo(string url)
{
Result[0] = Result[1] = url;

//http://player.youku.com/player.php/sid/XMzY3NzExNjgw/v.swf
//http://player.youku.com/player.php/Type/Folder/Fid/17213424/Ob/1/Pt/0/sid/XMzE2MzI5MDMy/v.swf
string videoId = GetVideoId(url,'/',1);
Result[2] = GetSomething(GetResultFromUrl(CombineStr(syouKuPicUrlById, videoId)).Replace(@"\/", "/"), imgLinkRegxStr);
return Result;

}


土豆视频



给出土豆网页地址:



//一、输入视频网页(html页面)
//1.带.html(规则的网页)
static string htuDouThumUrl = "http://www.tudou.com/playlist/service/getPlaylists.html?lids={0}";//---根据lid查询缩略图地址
static string htuDouVideoUrlId = "http://v2.tudou.com/v?vn=02&st=1%2C2&it={0}";//-------根据lid查询视频地址需要的id
static string htuDouVideoUrlById = "http://www.tudou.com/l/{0}";//-------根据查出来的视频id拼出视频地址
//2.不带.html(不规则的网页)
static string htuDouContainUrl = "http://www.tudou.com/programs/view/";//-------------不规则的网页地址里面包含此内容
static string htuDouVideoUrlByKey = "http://www.tudou.com/v/{0}";//----------根据网页地址截取其中的视频唯一值key,获得视频地址
public override string[] GetVideoInfo(string url)
{
Result[0] = url;//网页地址
string lid = "";
//1.规则的网页地址:即带html后缀
if (url.ToLower().Contains(".html"))
{
string fileName = string.Empty;
if (url.IndexOf('?') > 0)
{
fileName = System.IO.Path.GetFileName(url.Remove(url.IndexOf('?')));
}
else
{
fileName = System.IO.Path.GetFileName(url);
}
fileName = fileName.Replace(".html", string.Empty);
int iindex = fileName.ToLower().IndexOf("i");
if (iindex < 0) iindex = fileName.Length - 1;
int lindex = fileName.ToLower().IndexOf("l");
if (lindex >= 0)
{
lid = fileName.Substring(lindex + 1, iindex - lindex - 1);
}
else
{
lid = "";
}
//获取视频地址

string vedioSl = GetSomething(GetResultFromUrl(CombineStr(htuDouVideoUrlId, lid)), "cd=\"[\\S]+\"");
if (vedioSl != "")
{
Result[1] = CombineStr(htuDouVideoUrlById, vedioSl.Remove(0, 4).Replace("\"", ""));
}
else
{
Result[1] = url;
}
//获取缩略图
string newurl = CombineStr(htuDouThumUrl, lid);
string picUrl = GetSomething(GetResultFromUrl(newurl).Replace(@"\/", "/"), "http://([\\w]+[./]*)+");
//if (System.IO.Path.GetFileNameWithoutExtension(picUrl).ToLower() == "p")
//{
if (picUrl != "")
{
Result[2] = picUrl.Replace(System.IO.Path.GetFileName(picUrl), string.Empty) + "w" + System.IO.Path.GetExtension(picUrl);
}
else
{
Result[2] = "服务器没有该视频的缩略图";
}
//}
//else
//{
//    Result[2] = "";
//}
}
else if (url.ToLower().StartsWith(htuDouContainUrl))
{
int paIndex = url.IndexOf('?');
string[] directs = url.Remove(paIndex > 0 ? paIndex : url.Length - 1).Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
string param = string.Empty;//获取地址中的id比如获取http://www.tudou.com/programs/view/uuxZVpkDtUw/?union_id=100493_100001_02_01中uuxZVpkDtUw
if (directs.Length > 0)
param = directs[directs.Length - 1];
//-----------------------------------得到视频地址---------------------------------
Result[1] = CombineStr(htuDouVideoUrlByKey, param);
//接下来得到缩略图,调用方法获取视频缩略图
TuDouSwf ts = new TuDouSwf();

Result[2]=ts.GetVideoInfo(CombineStr(htuDouVideoUrlByKey, param))[2];
}
else //其他情况
{
//
}
return Result;
}

[/code]

给出土豆视频地址:

//二、输入视频地址(不带.swf)
//1.根据视频地址请求的地址中含有lid,不含snap_pic图片地址
static string stuDouThumUrl = "http://www.tudou.com/playlist/service/getPlaylists.html?lids={0}";//-------------如果传入路径中包含lid,根据截取出的lid得到缩略图地址
static string stuDouHtmlUrl1 = "http://www.tudou.com/playlist/p/l{0}.html";//----根据视频lid值得到视频的网页地址
//2.根据视频地址请求的地址中不含lid,含有snap_pic图片地址
static string stuDouRemove = "http://www.tudou.com/v/";//----截取视频唯一值时用到的一段
static string stuDouHtmlUrl2 = "http://www.tudou.com/programs/view/{0}/";//------根据传入的视频地址截取唯一值拼出网页地址

public override string[] GetVideoInfo(string url)
{
Result[1] = url;//视频地址
string mc = GetParamFromUrl(url);
string[] str = mc.Split('&');
string strlid = "";//获取路径中的lid
string snap_pic = "";//获取缩略图路径
foreach (var item in str)
{
if (item.Contains("lid="))
{
if (item.StartsWith("lid="))
{
strlid = item.ToString();
}
}
else if (item.Contains("snap_pic="))
{
if (item.StartsWith("snap_pic="))
{
snap_pic = item.ToString();
}
}
}

//两种获取缩略图的方式:
//1.含有lid的
if (strlid != "")
{
string newurl = CombineStr(stuDouThumUrl, strlid.Replace("lid=", ""));
Result[0] = CombineStr(stuDouHtmlUrl1, strlid.Replace("lid=", ""));
string picUrl = GetSomething(GetResultFromUrl(newurl).Replace(@"\/", "/"), "http://([\\w]+[./]*)+");
Result[2] = picUrl.Replace(System.IO.Path.GetFileName(picUrl), string.Empty) + "w" + System.IO.Path.GetExtension(picUrl);

}
//2.不含lid,含有缩略图路径
else if(snap_pic!="")
{
string uml = url.Replace(stuDouRemove,"");
if (uml.IndexOf("/") > 0)
{
uml = uml.Remove(uml.IndexOf("/"));
}
Result[0] = CombineStr(stuDouHtmlUrl2,uml);

Result[2] = System.Web.HttpContext.Current.Server.UrlDecode(snap_pic.Replace("snap_pic=",""));

}

return Result;
}

[/code]

如有不足的地方请多多指教,如果有友友在开发中遇到这样的问题,希望可以帮助你!

源码地址:

源代码
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