protected override bool IsLinkExist(string l)
{
if (ReferenceEquals(LinksPool, null) || LinksPool.Count.Equals(0))
{
return(false);
}
try {
var link = LinksPool.Where(e => e.Equals(l)).FirstOrDefault();
if (!ReferenceEquals(link, null))
{
return(true);
}
return(false);
} catch (Exception) {
return(false);
}
}
protected override void LinksScrapperThread(string l)
{
_l.info("Processor thread");
if (ValidationService.Validate(l))
{
ScrapingBrowser _b = new ScrapingBrowser();
try {
var htmlNode = _b.NavigateToPage(new Uri(l)).Html;
if (!ReferenceEquals(htmlNode, null))
{
//var links = htmlNode.SelectNodes("//body//a/@href");
var links = htmlNode.CssSelect("a");
if (!ReferenceEquals(links, null))
{
try {
var productNameNode = htmlNode.CssSelect(requestScrappingSite.SiteProductPageIndicationSelector);
if (!ReferenceEquals(productNameNode, null) && !ReferenceEquals(productNameNode.First(), null))
{
var preparedLink = PrepareLink(l);
_l.info($"Link {preparedLink} is a valid link, adding it to collection!");
LinksPool.Add(preparedLink);
}
else
{
_l.warn("Node selection error: not a product name");
}
} catch (Exception) {
// _l.warn($"Url {l} is not a valid product page, skip it");
}
foreach (var link in links)
{
var linkValue = link.GetAttributeValue("href", "").Trim();
if (ValidationService.Validate(linkValue))
{
var preparedLink = PrepareLink(linkValue);
if (!IsLinkExist(preparedLink) && IsNotExcluded(preparedLink))
{
LinksPool.Add(preparedLink);
TurnableLinksList.Add(preparedLink);
}
else
{
// _l.warn($"Link {preparedLink} already scrapped, skip it...");
}
}
else
{
// _l.warn($"Link {linkValue} is not our required link!");
}
}
}
else
{
_l.warn($"Any links on the page {l}");
}
}
else
{
_l.warn($"Nothing to scrap from url {l}");
}
} catch (AggregateException e) {
_l.error(String.Concat(e.Message, " -> ", l));
}
}
else
{
if (ReferenceEquals(ValidationService.GetExceptMessage(), null))
{
// _l.warn($"Link {l} already processed, skipping it...");
}
else
{
_l.warn(ValidationService.GetExceptMessage());
}
}
}
