public List <DtoNewsUrlList> NewsUrlGathering(string newsListUrl, int newsType)
{
try
{
Log.Info(newsListUrl + " 抓取开始");
var strContent = HttpHelper.GetContentByMobileAgent(newsListUrl, Encoding.GetEncoding("gb2312"));
if (string.IsNullOrWhiteSpace(strContent))
{
Log.Info(newsListUrl + " 未抓取到任何内容");
return(null);
}
//取得标题列表
var strList = XpathHelper.GetInnerHtmlListByXPath(strContent, "//div[@class='leftList']/ul/li");
if (strList != null && strList.Count > 0)
{
foreach (var item in strList)
{
try
{
var url = XpathHelper.GetAttrValueByXPath(item, "//a", "href");
var title = XpathHelper.GetInnerHtmlByXPath(item, "//a", "");
title = StrHelper.FormatHtml(title).Trim();
var isHave = DalNews.IsExistsNews(title);
//如果已存在则跳过
if (isHave)
{
continue;
}
if (newsType == 100 || newsType == 200 || newsType == 300)
{
#region === 根据详细页地址取新闻内容 ===
var news = NewsGathering(url);
if (news != null)
{
news.NewsTypeId = newsType;
news.Title = title;
news.PubTime = StrHelper.ToDateTime(StrHelper.FormatPubTime(news.PubTime.ToString()));
//入库
var newsId = DalNews.Insert(news);
if (newsId < 1)
{
continue;
}
//从内容中提取img,存入newsmedia
var mediaList = ImgDeal.GetImgList(news.Contents);
if (mediaList != null && mediaList.Count > 0)
{
news.Contents = mediaList[0].Description;
foreach (var picitem in mediaList)
{
picitem.NewsId = newsId;
DalNews.InsertMedia(picitem);
}
}
//休眠 控制抓取的频率
Random rnd = new Random();
var sleepSeconds = rnd.Next(30, 90);
Thread.Sleep(sleepSeconds * 1000);
}
#endregion
}
if (newsType == 400)
{
#region === 根据详细页地址取图片内容 ===
var mediaList = NewsPicGathering(url);
var news = new DtoNews()
{
Title = title,
FromUrl = url,
NewsTypeId = newsType,
};
if (mediaList != null && mediaList.Count > 0)
{
news.Contents = mediaList[0].Description;
//入库
var newsId = DalNews.Insert(news);
foreach (var picitem in mediaList)
{
picitem.NewsId = newsId;
DalNews.InsertMedia(picitem);
}
}
//休眠 控制抓取的频率
Random rnd = new Random();
var sleepSeconds = rnd.Next(30, 90);
Thread.Sleep(sleepSeconds * 1000);
#endregion
}
Log.Info(url + " 抓取完成");
}
catch (Exception ex)
{
//Log.Error("内容: " + item);
Log.Error(ex.Message + ex.StackTrace);
}
}
}
Log.Info(newsListUrl + " 抓取结束");
return(null);
}
catch (Exception ex)
{
Log.Error(ex.Message + ex.StackTrace);
}
return(null);
}