public void Crawl(int depth, string url)
{
if (depth > _depth)
{
return;
}
var node = GetNode(url);
var status = OpenPage(node);
node.MakeVisited()
.SetStatusCode(status);
_pages[url] = node;
var urls = GetAttributes("a", "href").ToList();
urls = Sanitizer.SanitizeUrls(urls, _baseUrl, _pages).ToList();
var urlsToDelete = AddParentNode(url, urls);
urls = urls.Except(urlsToDelete).ToList();
Parallel.ForEach(urls,
new ParallelOptions {
MaxDegreeOfParallelism = 2
},
url =>
{
if (_pages[url].GetVisited())
{
return;
}
if (!url.StartsWith(_baseUrl))
{
return;
}
Crawl(depth + 1, url);
});
}