public static List <string> GetAllLinks(HtmlSource html)
{
var doc = new HtmlDocument();
//await GetHtmlSource(html);
doc.LoadHtml(html.source);
var result = doc.DocumentNode.Descendants("a").Select(node => node.GetAttributeValue("href", "null")).ToList();
var links = GetRightLinks(result, html);
return(links);
}
public static async Task GetHtmlSource(HtmlSource html)
{
using (var client = new HttpClient())
{
var response = await client.GetAsync(html.url);
string result = null;
if (response != null && response.StatusCode == HttpStatusCode.OK)
{
result = await response.Content.ReadAsStringAsync();
}
html.source = result;
html.body = GetBody(result);
html.domain = GetDomain(html.url);
}
}
public async Task <List <HtmlSource> > Walk(int currentDepth, List <string> currentLinks, List <HtmlSource> resultLinks)
{
foreach (var link in currentLinks)
{
if (!addedLinks.Contains(link))
{
addedLinks.Add(link);
var html = new HtmlSource()
{
url = link
};
await HtmlSourceMethods.GetHtmlSource(html);
resultLinks.Add(html);
if (depth > currentDepth)
{
await Walk(currentDepth + 1, HtmlSourceMethods.GetAllLinks(html), resultLinks);
}
}
}
return(resultLinks);
}
private static List <string> GetRightLinks(List <string> links, HtmlSource html)
{
var result = new List <string>();
string modifiedLink = null;
foreach (var link in links)
{
if (link.StartsWith("https://", StringComparison.InvariantCulture))
{
modifiedLink = link;
}
else if (link.StartsWith('/'))
{
modifiedLink = html.domain + link;
}
else
{
break;
}
result.Add(modifiedLink);
}
return(result);
}
