/// 测试导出excel代码
private void TestExcelExport()
{
var homePageNode = HtmlCacheParser.LoadHtmlNode("http://www.bavc.com.cn/c44167.htm");
// 内容页 /html/body/table[4]/tbody/tr/td[3]/p[3]/table[1]
var mainContent = homePageNode.SelectSingleNode("/html/body/table[4]/tbody/tr/td[3]/table[3]");
List <string> urls = new List <string>();
foreach (var link in mainContent.SelectNodes(".//a"))
{
var navPath = link.Attributes["href"].Value;
var title = link.InnerText;
var address = "http://www.bavc.com.cn" + navPath;
urls.Add(address);
System.Console.WriteLine($"{title}, {address}");
}
ExcelSheetModel model = new ExcelSheetModel
{
Name = "test",
MediaItems = urls.Select(x => new MediaItem
{
Title = x
}).ToList()
};
ExcelHelper.Save("test.xlsx", new ExcelSheetModel[] { model });
return;
}
/// <summary>
/// 部分页面没有MP3, 只有MP4视频, 需要检测MP4实际地址 (如： 乌盆记-1 言菊朋 http://www.bavc.com.cn/w10279097.htm?page=1)
/// 找到播放器id部分, 根据id推测出下载地址
/// player id: <div id="piv_d69fff2eae3766ef7aff664b0ab2b61d_d"></div>
/// 下载地址模板: http://mpv.videocc.net/d69fff2eae/{0}/{1}_1.mp4
/// </summary>
///
/// 以 piv_d69fff2eae3766ef7aff664b0ab2b61d_d 为例
/// id部分只要两个_之间的字符 d69fff2eae3766ef7aff664b0ab2b61d
/// mp4地址模板中:
/// {0} 为 "d69fff2eae3766ef7aff664b0ab2b61d" 最后一个字母d
/// {1} 为 ”d69fff2eae3766ef7aff664b0ab2b61d“
/// 则实际MP4地址为: https://mpv.videocc.net/d69fff2eae/d/d69fff2eae3766ef7aff664b0ab2b61d_1.mp4
public static string GuessMp4DownloadUrl(string title, string mp3InfoUrl)
{
// 复制Program.LoadMp3Info
var homePageNode = HtmlCacheParser.LoadHtmlNode(mp3InfoUrl);
// <div id="plv_d69fff2eae176f68eb79b5e0575cc75b_d"></div>
var main2 = homePageNode.SelectSingleNode("/html/body/table[4]/tbody/tr");
var targetNode = main2.SelectNodes(".//div").FirstOrDefault(x => x.Attributes["id"] != null && x.Attributes["id"].Value.StartsWith("plv_"));
if (targetNode == null)
{
HtmlParseLogger.Error($"mp4 解析错误 {title}({mp3InfoUrl})页面信息不存在");
}
var mp4UrlTemplate = "https://mpv.videocc.net/d69fff2eae/{0}/{1}_1.mp4";
var idVal = targetNode.Attributes["id"].Value;
var first_ = idVal.IndexOf("_");
var last_ = idVal.LastIndexOf("_");
if (first_ > -1 && last_ > -1 && first_ < last_)
{
//"plv_d69fff2eae176f68eb79b5e0575cc75b_d"
// d69fff2eae176f68eb79b5e0575cc75b
var mp4ItemKey = idVal.Substring(first_ + 1, last_ - first_ - 1);
return(string.Format(mp4UrlTemplate, mp4ItemKey[mp4ItemKey.Length - 1], mp4ItemKey));
}
return(string.Empty);
}
// 下载某个具体专辑信息
// 如：1.《评剧皇后白玉霜 》第一集 http://www.bavc.com.cn/c44169.htm
static MediaItem ParseMediaItem(string title, string url)
{
MediaItem item = new MediaItem();
item.Title = title;
item.Url = url;
DebugInfo($"读取专辑: {item.Title}");
var homePageNode = HtmlCacheParser.LoadHtmlNode(url);
// 主要内容的node
var mainNode = homePageNode.SelectSingleNode("/html/body/table[7]");
//发布时间: /html/body/table[7]/tbody/tr[1]/td/p[2]/font/span
item.PublishTime = mainNode.SelectSingleNode(".//font/span")?.InnerText;
//简介 /html/body/table[7]/tbody/tr[3]/td/div/p[1]
item.Description = mainNode.SelectSingleNode(".//div[@class='article']")?.InnerText;
// 封面图片 /html/body/table[7]/tbody/tr[3]/td/div/p[2]/img
var imageAttr = mainNode.SelectSingleNode(".//div[@class='article']//img")?.Attributes["src"]?.Value;
if (!string.IsNullOrEmpty(imageAttr))
{
item.ImageUrl = StaticVariables.HOST_NAME.TrimEnd('/') + imageAttr;
}
// MP3列表 /html/body/table[7]/tbody/tr[7]/td/p/table/tbody/tr[1]/td[2]/a
foreach (var link in mainNode.SelectNodes(".//a"))
{
var href = link.Attributes["href"].Value;
var mp3Title = link.InnerText;
// http://www.bavc.com.cn/xxxx.htm
var address = StaticVariables.HOST_NAME.TrimEnd('/') + href;
var mp3Info = new Mp3Info
{
Title = mp3Title,
Url = address
};
// DebugInfo($"\t读取专辑下曲目: {mp3Title}");
LoadMp3Info(mp3Info);
item.Mp3Items.Add(mp3Info);
}
return(item);
}
///<summary>
/// 返回当前分类下每个专辑的名称, url
/// http://www.bavc.com.cn/c44169.htm
///</summary>
static List <MediaItem> ParseMediaItems(string url)
{
var homePageNode = HtmlCacheParser.LoadHtmlNode(url);
// 内容页 /html/body/table[4]/tbody/tr/td[3]/p[3]/table[1]
// /html/body/table[4]
var mainNode = homePageNode.SelectSingleNode("/html/body/table[4]/tbody/tr/td[3]/table[3]");
var mediaItemDic = new Dictionary <string, MediaItem>();
foreach (var link in mainNode.SelectNodes(".//p/a"))
{
var navPath = link.Attributes["href"].Value;
var title = link.InnerText;
// http://www.bavc.com.cn/xxxx.htm
var address = StaticVariables.HOST_NAME.TrimEnd('/') + navPath;
if (mediaItemDic.ContainsKey(title))
{
//HtmlParseLogger.Error($"已经下载过{title}: {address}");
//System.Console.WriteLine($"已经下载过{title}: {address}");
continue;
}
try
{
MediaItem item = ParseMediaItem(title, address);
mediaItemDic.Add(title, item);
}
catch (Exception ex)
{
DebugInfo(ex.Message);
}
}
return(mediaItemDic.Values.ToList());
}
/// url为某个具体MP3播放页面
/// 从url中读取MP3相关信息
static void LoadMp3Info(Mp3Info mp3Info)
{
if (mp3Info == null || string.IsNullOrEmpty(mp3Info.Url))
{
throw new ArgumentException(nameof(mp3Info));
}
// 播放页面左侧有导航栏的情况（少数是这样）
// 无导航： http://www.bavc.com.cn/w10276740.htm?page=1
// 有导航： http://www.bavc.com.cn/w10276738.htm?page=1
var homePageNode = HtmlCacheParser.LoadHtmlNode(mp3Info.Url);
var tdNodes = homePageNode.SelectNodes("/html/body/table[4]/tbody/tr/td");
if (tdNodes == null || tdNodes.Count == 0)
{
HtmlParseLogger.Error($"{mp3Info.Title}({mp3Info.Url})页面信息不存在");
}
// 音频页面有导航栏xpath不同
bool hasSidebar = tdNodes.Count > 1;
HtmlNode mainNode = null;
if (!hasSidebar)
{
mainNode = homePageNode.SelectSingleNode("/html/body/table[4]/tbody/tr/td/table[4]");
}
else
{
mainNode = homePageNode.SelectSingleNode("/html/body/table[4]/tbody/tr/td[3]/center/table[last()]");
}
if (mainNode == null)
{
HtmlParseLogger.Error($"{mp3Info.Title}({mp3Info.Url})页面信息不存在");
}
// 标题(列表页已经获取了) /html/body/table[4]/tbody/tr/td/table[4]/tbody/tr[2]/td/table/tbody/tr[1]/td/p[1]/span
// 当前读取方式会显示‘Your browser does not support’，<a>写出了地址
mp3Info.Mp3DownloadUrl = mainNode.SelectSingleNode(".//table[1]//table[1]//a")?.Attributes["href"]?.Value;
// 如果没有MP3, 检测MP4
if (string.IsNullOrEmpty(mp3Info.Mp3DownloadUrl))
{
mp3Info.Mp4DownloadUrl = GuessMp4DownloadUrl(mp3Info.Title, mp3Info.Url);
}
// 歌词标题和歌词在一个td里, 标题带有<strong>
// /html/body/table[4]/tbody/tr/td/table[4]/tbody/tr[2]/td/table/tbody/tr[5]/td/strong
// /html/body/table[4]/tbody/tr/td/table[4]/tbody/tr[2]/td/table/tbody/tr[4]/td
// 歌词部分有两种可能
HtmlNode lyricNode = mainNode.SelectSingleNode("./tbody/tr[last()-1]/td/table/tbody/tr[last()]");
if (lyricNode == null)
{
lyricNode = mainNode.SelectSingleNode("./tbody/tr[last()-2]/td/table/tbody/tr[last()]");
}
if (lyricNode == null)
{
HtmlParseLogger.Error($"{mp3Info.Title}({mp3Info.Url})歌词信息不存在, 跳过");
}
// 大部分标题在<p><strong>{Title}</strong></p>中
// 目前只发现13. 《梨园名票唱腔选》第三集 "06.武家坡-2 夏山楼主 高亭"没有<strong>, 标题<p>{Title}</p>中
var lyricTitle = (lyricNode?.SelectSingleNode(".//strong") ??
lyricNode?.SelectSingleNode(".//p"))?.InnerText;
var lyric = lyricNode?.InnerText;
// .Replace(" ", "")
lyric = lyric?.Replace("\r\n", "");
// 歌词去掉标题部分
if (!string.IsNullOrEmpty(lyricTitle) &&
!string.IsNullOrEmpty(lyric))
{
var titleIndex = lyric.IndexOf(lyricTitle);
// 标题出现在开头
if (titleIndex == 0 && lyric.Length > lyricTitle.Length)
{
lyric = lyric.Substring(lyricTitle.Length);
}
}
mp3Info.Lyric = lyric;
mp3Info.LyricTitle = lyricTitle;
}