public static int GetPageLastIndex(string pageUrl) { var doc = WebpageHelper.GetHttpRequestDocument(pageUrl); var nodes = doc.DocumentNode.SelectNodes("//div[@class='page-mod']/ul/li"); if (nodes == null) { return(100); } int lastIndex = 0; foreach (var node in nodes) { string indexString = node.InnerText; int tempIndex; if (int.TryParse(indexString, out tempIndex)) { if (lastIndex < tempIndex) { lastIndex = tempIndex; } } } return(lastIndex); }
public static void GetForumsList(BufferBlock <string> imageTargetBlock) { var block = new BufferBlock <string>(); var task = GetNewsDetail.GenerateForumDetail(block, imageTargetBlock); int errorTime = 0; var firstPage = "http://www.ihchina.cn/luntan/p/1.html"; var lastPageNumber = DebugHelperTools.IsDebugMode() ? 2 : WebpageHelper.GetPageLastIndex(firstPage); for (int i = 1; i < lastPageNumber && errorTime < 10; i++) { var listUrl = string.Format("http://www.ihchina.cn/luntan/p/{0}.html", i); Console.WriteLine("starting process page:{0}", listUrl); var doc = WebpageHelper.GetHttpRequestDocument(listUrl); var listNodes = doc.DocumentNode.SelectNodes("//div[@id='datalist']/div[@class='list-item']"); if (listNodes == null) { errorTime++; continue; } List <BsonDocument> result = new List <BsonDocument>(); foreach (var node in listNodes) { if (errorTime == 10) { break; } var bson = WebpageHelper.AnalizeGeneralListInformation(node, MongodbChecker.CheckForumsListExist, imageTargetBlock); if (bson == null) { errorTime++; Console.WriteLine("duplicated url: page {0}", i); continue; } if (bson != null) { var link = bson.GetElement("link").Value.ToString(); block.Post(link); result.Add(bson); } //每10条进行一次数据库插入,减少内存负担 if (result.Count == 10) { MongodbSaver.SaveForumsList(result); result.Clear(); } } if (result.Count > 0) { MongodbSaver.SaveForumsList(result); } } block.Complete(); task.Wait(); }
private static BsonDocument processDetailPage(string url, BufferBlock<string> imageBlock) { Console.WriteLine("starting process: " + url + "...."); var doc = WebpageHelper.GetHttpRequestDocument(url); var titleNode = doc.DocumentNode.SelectSingleNode("//div[@class='article-title']"); if (titleNode == null) return null; bson.Clear(); bson.Add("link", url); var titleNameNode = titleNode.SelectSingleNode(".//div[@class='h24']"); if (titleNameNode != null) { bson.Add("title", titleNameNode.InnerText.Replace("\t", "")); //规格化文字,TODO 未完成 } var titleSubItemsNodes = titleNode.SelectNodes(".//div[@class='sub']/span[@class='sub-item']"); if(titleSubItemsNodes==null) { return null; } var subTitleList = new BsonArray(); foreach (var subItemNode in titleSubItemsNodes) { if (subItemNode.SelectSingleNode(".//div[@class='en']") != null) //日期的要单独处理 { var dateNode = subItemNode.SelectSingleNode(".//div[@class='en'"); subTitleList.Add(dateNode.InnerText); } else { subTitleList.Add(subItemNode.InnerText); } } bson.Add("subtitle", subTitleList); //开始读取内容 var contentList = new BsonArray(); var contentNodes = doc.DocumentNode.SelectNodes("//div[@class='article-cont']/p"); if(contentNodes==null) { return null; } foreach (var node in contentNodes) { var lineDic = new BsonDocument(); var picNode = node.SelectSingleNode(".//img"); if (picNode != null) { var imgUrl = WebpageHelper.GetSubUrl(picNode.Attributes["src"].Value); lineDic["type"] = "img"; lineDic["content"] = imgUrl; lineDic["compressImg"] = WebImageSaver.Instance.GetComressImageName(imgUrl); imageBlock.Post(GetIhChina.MainPage + picNode.Attributes["src"].Value); } else { lineDic["type"] = "text"; lineDic["content"] = node.InnerText; } contentList.Add(lineDic); } bson.Add("content", contentList); var authorNode = doc.DocumentNode.SelectSingleNode("//div[@class='author']"); if (authorNode != null) { bson.Add("author", authorNode.InnerText); } //爬取底部相关阅读 var relativeNews = doc.DocumentNode.SelectNodes("//div[@class='list-mod4']/a"); if (relativeNews != null) { var relativeNewsList = new BsonArray(); foreach (var node in relativeNews) { var newsDic = new BsonDocument(); newsDic["link"] = node.Attributes["href"].Value; var date = node.SelectSingleNode(".//div[@class='date']"); if (date != null) { newsDic["date"] = date.InnerText; } var title = node.SelectSingleNode(".//div[@class='p']"); if (title != null) { newsDic["title"] = title.InnerText; } relativeNewsList.Add(newsDic); } if (relativeNewsList.Count > 0) { bson.Add("relativeNews", relativeNewsList); } } Console.WriteLine(bson); return bson; }