public static string GetTextNode(this HtmlNode node)
{
var para = new ParaClass();
node.GetTextRootProbability(para);
return(XPath.SubXPath(para.Path, -2));
}
public static string GetTextNode(this HtmlNode node)
{
var para = new ParaClass();
node.GetTextRootProbability(para);
var path = new XPath(para.Path);
return(path.SubXPath(0, path.Count - 2).ToString());
}
public static IEnumerable <CrawTarget> SearchPropertiesSmart(this HtmlDocument doc2,
ICollection <CrawlItem> existItems = null, string rootPath = null, bool isAttrEnabled = false)
{
if (existItems == null)
{
existItems = new List <CrawlItem>();
}
var shortv = "";
var dict = new Dictionary <string, double>();
if (string.IsNullOrEmpty(rootPath))
{
var isForceItemOne = false; //强制进入只有一个属性的模式
if (existItems.Count > 1)
{
shortv =
XPath.GetMaxCompareXPath(existItems.Select(d => d.XPath));
var nodes = doc2.DocumentNode.SelectNodes(shortv);
if (nodes == null || nodes.Count == 0)
{
yield break;
}
if (nodes.Count == 1)
{
isForceItemOne = true;
}
else
{
var items = GetDiffNodes(doc2, shortv, isAttrEnabled, existItems, 1);
var target = getCrawTarget(items, shortv);
if (target != null)
{
yield return(target);
}
}
}
if (isForceItemOne || existItems.Count == 1)
{
var realPath = existItems.First().XPath;
var items = XPath.Split(realPath);
var array =
items.SelectAll(d => true)
.Select(d => XPath.SubXPath(realPath, d)).ToList();
foreach (var item in array)
{
GetTableRootProbability(
doc2.DocumentNode.SelectSingleNode(item)
.ChildNodes.Where(d2 => d2.Name.Contains("#") == false)
.ToList(), dict, false);
}
}
else
{
GetTableRootProbability(
doc2.DocumentNode.ChildNodes.Where(d => d.Name.Contains("#") == false).ToList(), dict, true);
}
if (isForceItemOne || existItems.Count < 2)
{
IEnumerable <KeyValuePair <string, double> > p = dict.OrderByDescending(d => d.Value);
foreach (var keyValuePair in p)
{
var items = GetDiffNodes(doc2, keyValuePair.Key, isAttrEnabled, existItems, 4);
if (items.Count == 0)
{
continue;
}
var target = getCrawTarget(items, keyValuePair.Key);
var rootNode = doc2.DocumentNode.SelectSingleNode(keyValuePair.Key).ParentNode;
if (rootNode == null)
{
continue;
}
target.Html = rootNode.InnerHtml;
target.Text = rootNode.InnerText;
target.NodeCount = doc2.DocumentNode.SelectNodes(keyValuePair.Key).Count;
target.Score = keyValuePair.Value;
target.ColumnCount = items.Count;
yield return(target);
}
}
}
else
{
var items = GetDiffNodes(doc2, rootPath, isAttrEnabled, new List <CrawlItem>());
if (items.Count > 0)
{
var root = doc2.DocumentNode.SelectSingleNode(rootPath);
var xpath = XPath.RemoveFinalNum(root.XPath);
var target = getCrawTarget(items, xpath);
target.RootXPath = rootPath;
yield return(target);
}
}
}
public static IEnumerable <CrawTarget> SearchPropertiesSmart(this HtmlDocument doc2,
ICollection <CrawlItem> existItems = null, string rootPath = null, bool isAttrEnabled = false)
{
if (existItems == null)
{
existItems = new List <CrawlItem>();
}
var shortv = "";
var dict = new Dictionary <string, double>();
if (string.IsNullOrEmpty(rootPath))
{
if (existItems.Count > 1)
{
shortv =
XPath.GetMaxCompareXPath(existItems.Select(d => d.XPath));
var items = GetDiffNodes(doc2, shortv, isAttrEnabled, existItems, 1);
var target = getCrawTarget(items, shortv);
if (target != null)
{
yield return(target);
}
yield break;
}
if (existItems.Count == 1)
{
var realPath = existItems.First().XPath;
var items = XPath.Split(realPath);
var array =
items.SelectAll(d => true)
.Select(d => XPath.SubXPath(realPath, d)).ToList();
foreach (var item in array)
{
GetTableRootProbability(
doc2.DocumentNode.SelectSingleNode(item)
.ChildNodes.Where(d2 => d2.Name.Contains("#") == false)
.ToList(), dict, false);
}
}
else
{
GetTableRootProbability(
doc2.DocumentNode.ChildNodes.Where(d => d.Name.Contains("#") == false).ToList(), dict, true);
}
if (existItems.Count < 2)
{
IEnumerable <KeyValuePair <string, double> > p = dict.OrderByDescending(d => d.Value);
foreach (var keyValuePair in p)
{
var items = GetDiffNodes(doc2, keyValuePair.Key, isAttrEnabled, existItems, 4);
var target = getCrawTarget(items, keyValuePair.Key);
if (target != null)
{
yield return(target);
}
}
}
}
else
{
var items = GetDiffNodes(doc2, rootPath, isAttrEnabled, new List <CrawlItem>());
if (items.Count > 0)
{
var root = doc2.DocumentNode.SelectSingleNode(rootPath);
foreach (var crawlItem in items)
{
crawlItem.XPath = XPath.TakeOff(crawlItem.XPath, root.XPath);
}
var target = getCrawTarget(items, rootPath);
if (target != null)
{
yield return(target);
}
}
}
}
