/// <summary>
/// Recursive method to go through all the link
/// </summary>
/// <param name="url"></param>
public static void CrawlPage(Uri url)
{
if (!PageHasBeenCrawled(url))
{
var htmlText = getPageContent(url);
var linkParser = new LinkParser();
_pages.Add(url);
linkParser.ParseLinks(htmlText, url);
AddRangeButNoDuplicates(_sameDomainPage, linkParser.ValidUrls);
AddRangeButNoDuplicates(_externalPages, linkParser.ExternalUrls);
AddRangeButNoDuplicates(_staticContent, linkParser.OtherUrls);
//Crawl all the links found on the page.
foreach (Uri link in linkParser.ValidUrls)
{
try
{
if (link.ToString() != String.Empty && link.ToString() != ConfigurationManager.AppSettings["url"] &&
link != url)
{
CrawlPage(link);
}
}
catch (Exception)
{
// add code to find the list of broken url's
}
}
}
}
/// <summary>
/// Crawls a page.
/// </summary>
/// <param name="url">The url to crawl.</param>
private void CrawlPage(string url)
{
if (!PageHasBeenCrawled(url))
{
var htmlText = GetWebText(url);
var linkParser = new LinkParser();
var page = new Page();
page.Text = htmlText;
page.Url = url;
_pages.Add(page);
linkParser.ParseLinks(page, url);
//Add data to main data lists
if (isCurrentPage)
{
AddRangeButNoDuplicates(_currentPageUrlRepository.List, linkParser.ExternalUrls);
}
AddRangeButNoDuplicates(_externalUrlRepository.List, linkParser.ExternalUrls);
AddRangeButNoDuplicates(_otherUrlRepository.List, linkParser.OtherUrls);
AddRangeButNoDuplicates(_failedUrlRepository.List, linkParser.BadUrls);
foreach (string exception in linkParser.Exceptions)
{
_exceptions.Add(exception);
}
isCurrentPage = false;
//Crawl all the links found on the page.
foreach (string link in _externalUrlRepository.List)
{
string formattedLink = link;
try
{
formattedLink = FixPath(url, formattedLink);
if (formattedLink != String.Empty)
{
CrawlPage(formattedLink);
}
}
catch (Exception exc)
{
_failedUrlRepository.List.Add(formattedLink + " (on page at url " + url + ") - " + exc.Message);
}
}
}
}
