public void ParseRecursively(List <string> urlList)
{
urlList.ForEach(url =>
{
try
{
if (!CrawlStatusManager.IsWebsiteRecentlyIndexed(url))
{
CrawlStatusManager.MarkAsVisited(url);
var htmlDoc = Utils.LoadWebsite(url);
var retrievedInfo = Utils.RetrieveWebsiteInfo(url, htmlDoc);
crawledWebsites.OutputEntry(retrievedInfo);
var relatedWebsiteUrls = Utils.RetrieveRelatedWebsitesUrls(url, htmlDoc);
//if (relatedWebsiteUrls != null && relatedWebsiteUrls.Count() > 0)
// ParseRecursively(relatedWebsiteUrls);
}
else
{
Console.WriteLine("Website --> ALREADY VISITED -->" + url);
}
}
catch (Exception)
{
Console.WriteLine("Untreated error appeared. Skipping ---> " + url);
}
});
}
public void ParseQueue(List <string> urlList, ESWriteWebsitesManager outputManager)
{
int i = 0;
while (i < urlList.Count)
{
string url = urlList[i++];
try
{
if (!CrawlStatusManager.IsWebsiteRecentlyIndexed(url))
{
CrawlStatusManager.MarkAsVisited(url);
var htmlDoc = Utils.LoadWebsite(url);
var retrievedInfo = Utils.RetrieveWebsiteInfo(url, htmlDoc);
outputManager.OutputEntry(retrievedInfo);
var relatedWebsiteUrls = Utils.RetrieveRelatedWebsitesUrls(url, htmlDoc);
Console.WriteLine(i);
if (relatedWebsiteUrls != null && relatedWebsiteUrls.Count() > 0)
{
urlList.AddRange(relatedWebsiteUrls);
}
}
else
{
Console.WriteLine("Website --> ALREADY VISITED -->" + url + i);
}
}
catch (Exception ex)
{
Console.WriteLine("Untreated error appeared. Skipping ---> " + url);
}
}
}
public async Task ParseWebsiteRecursivelyAsync(string currentUrl)
{
if (!CrawlStatusManager.IsWebsiteRecentlyIndexed(currentUrl))
{
try
{
Console.WriteLine("New website" + currentUrl);
Stopwatch stopwatch;
stopwatch = Stopwatch.StartNew();
CrawlStatusManager.MarkAsVisited(currentUrl);
var htmlDoc = await UtilsAsync.LoadWebsiteAsync(currentUrl);
var retrievedInfo = await UtilsAsync.RetrieveWebsiteInfoAsync(currentUrl, htmlDoc);
await crawledWebsites.IndexEntryAsync(retrievedInfo);
var relatedWebsiteUrls = await UtilsAsync.RetrieveRelatedWebsitesUrlsAsync(currentUrl, htmlDoc);
stopwatch.Stop();
Console.WriteLine($@"Time Elapsed: {stopwatch.ElapsedMilliseconds} for crawling {currentUrl} with another {relatedWebsiteUrls.Count} referenced websites.");
foreach (var relatedWebsiteUrl in relatedWebsiteUrls)
{
//Task.Run(() => ParseWebsiteRecursivelyAsync(relatedWebsiteUrl));
}
}
catch (Exception ex)
{
Console.WriteLine("Untreated error appeared. Skipping ---> " + currentUrl);
}
}
}
