private void GetReferences()
{
HtmlNodeCollection hrefs = _doc.DocumentNode.SelectNodes("//a[@href]");
if (hrefs.IsNull())
{
References = new string[0];
return;
}
References = hrefs.
Select(href => href.Attributes["href"].Value).
Distinct().
ToArray();
}
//得到产品的颜色和大小数据，通过在线读取，该方法主要用于以自动无干预自动上产品
public List <ProductColor> GetProductColorByOnline(RequestModel requestModelbase, HtmlDocument doc)
{
BanggoRequestModel requestModel = new BanggoRequestModel();
Util.CopyModel(requestModelbase, requestModel);
HtmlNode htmlNodeColorList = doc.GetElementbyId(Resource.SysConfig_ColorListId);
if (htmlNodeColorList.IsNull())
{
return(null);
}
HtmlNodeCollection colors = htmlNodeColorList.SelectNodes("li/a");
if (colors.IsNull())
{
return(null);
}
var colorList = new List <ProductColor>();
foreach (HtmlNode colorNode in colors)
{
string colorInfo = colorNode.Attributes["onclick"].Value;
ProductColor productColor = CreateProductColor(colorInfo);
requestModel.ColorCode = productColor.ColorCode;
productColor.SizeList = GetAvailableSize(requestModel);
foreach (var size in productColor.SizeList)
{
productColor.AvlNumForColor += size.AvlNum;
}
colorList.Add(productColor);
}
return(colorList);
}
private void GetLinks()
{
HtmlNodeCollection atts = _doc.DocumentNode.SelectNodes("//*[@background or @lowsrc or @src or @href or @action]");
if (atts.IsNull())
{
Links = new string[0];
return;
}
Links = atts.
SelectMany(n => new[]
{
ParseLink(n, "background"),
ParseLink(n, "href"),
ParseLink(n, "src"),
ParseLink(n, "lowsrc"),
ParseLink(n, "action")
}).
Distinct().
ToArray();
}
public Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define
.NotNull(crawler, nameof(crawler))
.NotNull(propertyBag, nameof(propertyBag));
if (propertyBag.StatusCode != HttpStatusCode.OK)
{
return(Task.FromResult(true));
}
if (!IsHtmlContent(propertyBag.ContentType))
{
return(Task.FromResult(true));
}
HtmlDocument htmlDoc = new HtmlDocument
{
OptionAddDebuggingAttributes = false,
OptionAutoCloseOnEnd = true,
OptionFixNestedTags = true,
OptionReadEncoding = true
};
using (MemoryStream ms = new MemoryStream(propertyBag.Response))
{
Encoding documentEncoding = htmlDoc.DetectEncoding(ms);
ms.Seek(0, SeekOrigin.Begin);
if (!documentEncoding.IsNull())
{
htmlDoc.Load(ms, documentEncoding, true);
}
else
{
htmlDoc.Load(ms, true);
}
}
string originalContent = htmlDoc.DocumentNode.OuterHtml;
if (HasTextStripRules || HasSubstitutionRules)
{
string content = StripText(originalContent);
content = Substitute(content, propertyBag.Step);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
propertyBag["HtmlDoc"].Value = htmlDoc;
HtmlNodeCollection nodes = htmlDoc.DocumentNode.SelectNodes("//title");
// Extract Title
if (!nodes.IsNull())
{
propertyBag.Title = string.Join(";", nodes.
Select(n => n.InnerText).
ToArray()).Trim();
}
// Extract Meta Data
nodes = htmlDoc.DocumentNode.SelectNodes("//meta[@content and @name]");
if (!nodes.IsNull())
{
propertyBag["Meta"].Value = (
from entry in nodes
let name = entry.Attributes["name"]
let content = entry.Attributes["content"]
where !name.IsNull() && !name.Value.IsNullOrEmpty() && !content.IsNull() && !content.Value.IsNullOrEmpty()
select $"{name.Value}: {content.Value}").ToArray();
}
// Extract text
propertyBag.Text = htmlDoc.ExtractText().Trim();
if (HasLinkStripRules || HasTextStripRules)
{
string content = StripLinks(originalContent);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
string baseUrl = propertyBag.ResponseUri.GetLeftPart(UriPartial.Path);
// Extract Head Base
nodes = htmlDoc.DocumentNode.SelectNodes("//head/base[@href]");
if (!nodes.IsNull())
{
baseUrl = nodes
.Select(entry => new { entry, href = entry.Attributes["href"] })
.Where(arg => !arg.href.IsNull() &&
!arg.href.Value.IsNullOrEmpty() &&
Uri.IsWellFormedUriString(arg.href.Value, UriKind.RelativeOrAbsolute))
.Select(t =>
{
if (Uri.IsWellFormedUriString(t.href.Value, UriKind.Relative))
{
return(propertyBag.ResponseUri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped) + t.href.Value);
}
return(t.href.Value);
})
.AddToEnd(baseUrl)
.FirstOrDefault();
}
// Extract Links
DocumentWithLinks links = htmlDoc.GetLinks();
foreach (string link in links.Links.Union(links.References))
{
if (link.IsNullOrEmpty())
{
continue;
}
string decodedLink = ExtendedHtmlUtility.HtmlEntityDecode(link);
string normalizedLink = NormalizeLink(baseUrl, decodedLink);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
crawler.Crawl(new Uri(normalizedLink), propertyBag);
}
return(Task.FromResult(true));
}
public void Process(Crawler crawler, PropertyBag propertyBag)
{
AspectF.Define.
NotNull(crawler, "crawler").
NotNull(propertyBag, "propertyBag");
if (propertyBag.StatusCode != HttpStatusCode.OK)
{
return;
}
if (!IsHtmlContent(propertyBag.ContentType))
{
return;
}
HtmlDocument htmlDoc = new HtmlDocument
{
OptionAddDebuggingAttributes = false,
OptionAutoCloseOnEnd = true,
OptionFixNestedTags = true,
OptionReadEncoding = true
};
using (MemoryStream reader = propertyBag.GetResponseStream())
{
Encoding documentEncoding = htmlDoc.DetectEncoding(reader);
reader.Seek(0, SeekOrigin.Begin);
if (!documentEncoding.IsNull())
{
htmlDoc.Load(reader, documentEncoding, true);
}
else
{
htmlDoc.Load(reader, true);
}
}
string originalContent = htmlDoc.DocumentNode.OuterHtml;
if (HasTextStripRules || HasSubstitutionRules)
{
string content = StripText(originalContent);
content = Substitute(content, propertyBag.Step);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
HtmlNodeCollection nodes = htmlDoc.DocumentNode.SelectNodes("//title");
// Extract Title
if (!nodes.IsNull())
{
propertyBag.Title = string.Join(";", nodes.
Select(n => n.InnerText).
ToArray()).Trim();
}
// Extract Meta Data
nodes = htmlDoc.DocumentNode.SelectNodes("//meta[@content and @name]");
if (!nodes.IsNull())
{
propertyBag["Meta"].Value = (
from entry in nodes
let name = entry.Attributes["name"]
let content = entry.Attributes["content"]
where !name.IsNull() && !name.Value.IsNullOrEmpty() && !content.IsNull() && !content.Value.IsNullOrEmpty()
select name.Value + ": " + content.Value).ToArray();
}
propertyBag.Text = htmlDoc.ExtractText().Trim();
if (HasLinkStripRules || HasTextStripRules)
{
string content = StripLinks(originalContent);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
// Extract Links
DocumentWithLinks links = htmlDoc.GetLinks();
foreach (string link in links.Links.Union(links.References))
{
if (link.IsNullOrEmpty())
{
continue;
}
string baseUrl = propertyBag.ResponseUri.GetLeftPart(UriPartial.Path);
string decodedLink = ExtendedHtmlUtility.HtmlEntityDecode(link);
string normalizedLink = NormalizeLink(baseUrl, decodedLink);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
crawler.AddStep(new Uri(normalizedLink), propertyBag.Step.Depth + 1,
propertyBag.Step, new Dictionary <string, object>
{
{ Resources.PropertyBagKeyOriginalUrl, link },
{ Resources.PropertyBagKeyOriginalReferrerUrl, propertyBag.ResponseUri }
});
}
}
public override void Process(Crawler crawler, PropertyBag propertyBag)
{
AspectF.Define.
NotNull(crawler, "crawler").
NotNull(propertyBag, "propertyBag");
if (propertyBag.StatusCode != HttpStatusCode.OK)
{
return;
}
if (!IsHtmlContent(propertyBag.ContentType))
{
return;
}
HtmlDocument htmlDoc = new HtmlDocument
{
OptionAddDebuggingAttributes = false,
OptionAutoCloseOnEnd = true,
OptionFixNestedTags = true,
OptionReadEncoding = true
};
using (Stream reader = propertyBag.GetResponse())
{
Encoding documentEncoding = htmlDoc.DetectEncoding(reader);
reader.Seek(0, SeekOrigin.Begin);
if (!documentEncoding.IsNull())
{
htmlDoc.Load(reader, documentEncoding, true);
}
else
{
htmlDoc.Load(reader, true);
}
}
string originalContent = htmlDoc.DocumentNode.OuterHtml;
if (HasTextStripRules || HasSubstitutionRules)
{
string content = StripText(originalContent);
content = Substitute(content, propertyBag.Step);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
propertyBag["HtmlDoc"].Value = htmlDoc;
HtmlNodeCollection nodes = htmlDoc.DocumentNode.SelectNodes("//title");
// Extract Title
if (!nodes.IsNull())
{
propertyBag.Title = string.Join(";", nodes.
Select(n => n.InnerText).
ToArray()).Trim();
}
// Extract Meta Data
nodes = htmlDoc.DocumentNode.SelectNodes("//meta[@content and @name]");
if (!nodes.IsNull())
{
propertyBag["Meta"].Value = (
from entry in nodes
let name = entry.Attributes["name"]
let content = entry.Attributes["content"]
where !name.IsNull() && !name.Value.IsNullOrEmpty() && !content.IsNull() && !content.Value.IsNullOrEmpty()
select name.Value + ": " + content.Value).ToArray();
}
// Extract text
propertyBag.Text = htmlDoc.ExtractText().Trim();
if (HasLinkStripRules || HasTextStripRules)
{
string content = StripLinks(originalContent);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
string baseUrl = propertyBag.ResponseUri.GetLeftPart(UriPartial.Path);
// Extract Head Base
nodes = htmlDoc.DocumentNode.SelectNodes("//head/base[@href]");
if (!nodes.IsNull())
{
baseUrl =
nodes.
Select(entry => new { entry, href = entry.Attributes["href"] }).
Where(@t => [email protected]() && [email protected]() &&
Uri.IsWellFormedUriString(@t.href.Value, UriKind.RelativeOrAbsolute)).
Select(@t => @t.href.Value).
AddToEnd(baseUrl).
FirstOrDefault();
}
// Extract Links
DocumentWithLinks links = htmlDoc.GetLinks();
foreach (string link in links.Links.Union(links.References))
{
if (link.IsNullOrEmpty())
{
continue;
}
string decodedLink = ExtendedHtmlUtility.HtmlEntityDecode(link);
try
{
string normalizedLink = NormalizeLink(baseUrl, decodedLink);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
AddStepToCrawler(crawler, propertyBag, normalizedLink, link);
}
catch (UriFormatException)
{
//When the link is not propper formatted the link mist be ignored
}
}
}
