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); }