public IEnumerable <ShellNode> StartCrawlForSubwayRoom(string shellLineNumber, string shellLineName)
{
List <ShellNode> shellNodes = new List <ShellNode>();
int totalNumber = GetTotalShellNumberForSubwayType(shellLineNumber);
int pages = totalNumber / 30;
if (totalNumber % 30 > 0)
{
pages += 1;
}
Console.WriteLine($"{DateTime.Now}: Total page: {pages}.");
if (pages > 100)
{
pages = 100; // Only show 100 pages.
}
for (int i = 1; i <= pages; i++)
{
string pageUrl = BuildSubwayUrl(i, shellLineNumber);
ShellPageModel pageModel = CrawlOnePageInfo(pageUrl);
Console.WriteLine($"{DateTime.Now}: <{shellLineName}> start to crawl page: {pageUrl}.");
IEnumerable <ShellNode> pageNodes = ShellModelToNodes(pageModel, shellLineName);
shellNodes.AddRange(pageNodes);
Thread.Sleep(1000);
}
return(shellNodes);
}
private IEnumerable <ShellNode> ShellModelToNodes(ShellPageModel shellPageModel, string villageName)
{
List <ShellNode> nodes = new List <ShellNode>();
int count = shellPageModel.Floors.Count();
for (int i = 0; i < count; i++)
{
ShellNode node = new ShellNode();
node.VillageName = villageName;
node.Position = shellPageModel.Positions[i];
node.Floor = shellPageModel.Floors[i];
node.Orientation = shellPageModel.Orientations[i];
node.Price = shellPageModel.Prices[i];
node.Title = shellPageModel.Titles[i];
node.AreaNumber = shellPageModel.AreaNumbers[i];
node.AreaStr = shellPageModel.AreaStrings[i];
node.FollowDay = shellPageModel.FollowDays[i];
node.FollowNumber = shellPageModel.FollowNumbers[i];
node.UnitPrice = shellPageModel.UnitPrices[i];
node.YearInfo = shellPageModel.YearInfos[i];
node.CrawlDate = DateTime.Now;
node.LinkUrl = shellPageModel.LinkUrls[i];
nodes.Add(node);
}
return(nodes);
}
public IEnumerable <ShellNode> StartCrawlForOneVillage(string villageName)
{
List <ShellNode> shellNodes = new List <ShellNode>();
int totalNumber = GetTotalSellNumber(villageName);
int pages = totalNumber / 30;
if (totalNumber % 30 > 0)
{
pages += 1;
}
Console.WriteLine($"{DateTime.Now}: Total page: {pages}");
for (int i = 1; i <= pages; i++)
{
string pageUrl = BuildCrawlerUrl(i, villageName);
ShellPageModel pageModel = CrawlOnePageInfo(pageUrl);
Console.WriteLine($"{DateTime.Now}: start to crawl page: {pageUrl}.");
IEnumerable <ShellNode> pageNodes = ShellModelToNodes(pageModel, villageName);
shellNodes.AddRange(pageNodes);
Thread.Sleep(1000);
}
return(shellNodes);
}
private ShellPageModel CrawlOnePageInfo(string pageUrl)
{
ShellPageModel pageInfoModel = new ShellPageModel();
var doc = _web.Load(pageUrl);
var itemTitles = doc.DocumentNode.SelectNodes("//a[@class='img VIEWDATA CLICKDATA maidian-detail']");
pageInfoModel.Titles = itemTitles.Select(node => node.Attributes["title"].Value).ToList();
var linkUrls = doc.DocumentNode.SelectNodes("//a[@class='img VIEWDATA CLICKDATA maidian-detail']");
pageInfoModel.LinkUrls = linkUrls.Select(node => node.Attributes["href"].Value).ToList();
var positions = doc.DocumentNode.SelectNodes("//div[@class='positionInfo']");
pageInfoModel.Positions = positions.Select(node => node.InnerText.Trim()).ToList();
var houseInfos = doc.DocumentNode.SelectNodes("//div[@class='houseInfo']");
List <string> floor = new List <string>();
List <string> yearInfo = new List <string>();
List <string> areaStr = new List <string>();
List <string> areaNumber = new List <string>();
List <string> orientation = new List <string>();
foreach (HtmlNode node in houseInfos)
{
string allInfo = node.InnerText;
string[] infoArray = allInfo.Split('|');
if (infoArray.Length != 5)
{
floor.Add(null);
yearInfo.Add(null);
areaStr.Add(null);
areaNumber.Add(null);
orientation.Add(null);
}
else
{
floor.Add(infoArray[0].Trim());
yearInfo.Add(infoArray[1].Trim());
areaStr.Add(infoArray[2].Trim());
areaNumber.Add(infoArray[3].Trim());
orientation.Add(infoArray[4].Trim());
}
}
var followInfos = doc.DocumentNode.SelectNodes("//div[@class='followInfo']");
List <string> followNumber = new List <string>();
List <string> followDay = new List <string>();
foreach (HtmlNode node in followInfos)
{
string followStr = node.InnerText;
string[] infoArray = followStr.Split('/');
followNumber.Add(infoArray[0].Trim());
followDay.Add(infoArray[1].Trim());
}
var totalPrices = doc.DocumentNode.SelectNodes("//div[@class='totalPrice']");
pageInfoModel.Prices = totalPrices.Select(node => node.InnerText.Trim()).ToList();
var unitPrices = doc.DocumentNode.SelectNodes("//div[@class='unitPrice']");
pageInfoModel.UnitPrices = unitPrices.Select(node => node.InnerText.Trim()).ToList();
pageInfoModel.Floors = floor;
pageInfoModel.YearInfos = yearInfo;
pageInfoModel.AreaStrings = areaStr;
pageInfoModel.AreaNumbers = areaNumber;
pageInfoModel.Orientations = orientation;
pageInfoModel.FollowNumbers = followNumber;
pageInfoModel.FollowDays = followDay;
return(pageInfoModel);
}