//Crawl Instance
private async static void StartCrawlSitesAsync()
{
string[] lines;
string crawledUrl = null;
string a = null;
var siteToCrawlProvider = new SiteToCrawlProvider();
var list = new List <string>();
var fileStream = new FileStream("Sites.txt", FileMode.Open, FileAccess.Read);//open Sites.txt to read websites to be crawled
using (var streamReader = new StreamReader(fileStream, Encoding.UTF8))
{
string line;
while ((line = streamReader.ReadLine()) != null)
{
siteToCrawlProvider.AddSitesToCrawl(new List <SiteToCrawl>
{
new SiteToCrawl {
Uri = new Uri(line)
}
}); // add sites to a list
Console.WriteLine(line); //display the read sites
a = line;
}
//Create the crawl engine instance
var crawlEngine = new ParallelCrawlerEngine(new ParallelImplementationContainer
{
SiteToCrawlProvider = siteToCrawlProvider
});
//Register for site level events
crawlEngine.AllCrawlsCompleted += (sender, eventArgs) =>
{
Console.WriteLine("Completed crawling all sites");
};
crawlEngine.SiteCrawlCompleted += (sender, eventArgs) =>
{
Console.WriteLine("Completed crawling site {0}", eventArgs.CrawledSite.SiteToCrawl.Uri);
WebClient webClient = new WebClient();
Console.WriteLine(line);
webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
// Create Folder
// Specify a name for your top-level folder.
string folderName = @"c:\files\";
// You can write out the path name directly instead of using the Combine
// method. Combine just makes the process easier.
string pathString = @"c:\files\CryptoCrawler\";
System.IO.Directory.CreateDirectory(pathString);
// You can extend the depth of your path if you want to.
//pathString = System.IO.Path.Combine(pathString, "SubSubFolder");
// Create the subfolder. You can verify in File Explorer that you have this
// structure in the C: drive.
// Local Disk (C:)
// Top-Level Folder
// SubFolder
//System.IO.Directory.CreateDirectory(pathString);
// Create a file name for the file you want to create.
//string fileName = System.IO.Path.GetRandomFileName();
// This example uses a random string for the name, but you also can specify
// a particular name.
string fileName = "NewFile.htm";
// Use Combine again to add the file name to the path.
//string path = NextAvailableFilename(pathString);
// Verify the path that you have constructed.
Console.WriteLine("Path to my file: {0}\n", pathString);
// Check that the file doesn't already exist. If it doesn't exist, create
// the file and write integers 0 - 99 to it.
// DANGER: System.IO.File.Create will overwrite the file if it already exists.
// This could happen even with random file names, although it is unlikely.
webClient.DownloadFileAsync((eventArgs.CrawledSite.SiteToCrawl.Uri), NextAvailableFilename(pathString +
fileName));
List <UrlInfo> eCrawlResult = new List <UrlInfo>();
DateTime date = DateTime.Now; // will give the date for today
string dateWithFormat = date.ToLongDateString();
crawledUrl = eventArgs.CrawledSite.SiteToCrawl.Uri.ToString();
eCrawlResult.AddRange(new UrlInfo[] {
new UrlInfo((eventArgs.CrawledSite.SiteToCrawl.Uri).ToString(), (eventArgs.CrawledSite.SiteToCrawl.Id).ToString(), DateTime.Now.ToString())
});
string Path = (@"c:\files\");
//Stream stream = File.OpenWrite(Environment.CurrentDirectory + "\\mytext.txt");
XmlSerializer serial = new XmlSerializer(typeof(List <UrlInfo>));// serialize addresses to xml file
System.IO.StreamWriter writer = new System.IO.StreamWriter(@"C:\files\url.xml", true);
urls = eventArgs.CrawledSite.SiteToCrawl.Uri.ToString();
serial.Serialize(writer, eCrawlResult);
writer.Close();
// Keep the console window open in debug mode.
//System.Console.WriteLine("Press any key to exit.");
//System.Console.ReadKey();
//webClient.DownloadFileAsync(eventArgs.CrawledSite.SiteToCrawl.Uri, @"c:\files\myfile.htm");
};
crawlEngine.CrawlerInstanceCreated += (sender, eventArgs) =>
{
//Register for crawler level events. These are Abot's events!!!
eventArgs.Crawler.PageCrawlCompleted += (abotSender, abotEventArgs) =>
{
Console.WriteLine("You have the crawled page here in abotEventArgs.CrawledPage...");
};
};
await crawlEngine.StartAsync();
Test(crawledUrl);
Console.WriteLine("Press enter key to stop");
Console.Read();
//crawlEngine.Stop();
Console.WriteLine(line);
}
}
public void Run()
{
var resources = SqlHelper.UnloadResources();
if (!resources.Any())
{
return;
}
var siteToCrawls = new List <SiteToCrawl>();
foreach (var res in resources)
{
for (var i = 0; i < 10; i++)
{
siteToCrawls.Add(new SiteToCrawl
{
Uri = new Uri(string.Format(_urlPattern, res, 10 * i)),
SiteBag = new { Name = res, Number = i + 1 }
});
}
}
CrawlConfigurationX config = AbotXConfigurationSectionHandler.LoadFromXml().Convert();
XmlConfigurator.Configure();//So the logger
var siteToCrawlProvider = new SiteToCrawlProvider();
siteToCrawlProvider.AddSitesToCrawl(siteToCrawls);
//Create the crawl engine instance
var impls = new ParallelImplementationOverride(
config,
new ParallelImplementationContainer
{
SiteToCrawlProvider = siteToCrawlProvider
}
);
_crawlerEngine = new ParallelCrawlerEngine(config, impls);
//Register for site level events
_crawlerEngine.AllCrawlsCompleted += (sender, eventArgs) =>
{
Console.WriteLine("Completed crawling all sites");
_crawlerEngine.Stop(true);
Run();
};
_crawlerEngine.SiteCrawlCompleted += (sender, eventArgs) =>
{
Console.WriteLine("Completed crawling site {0}", eventArgs.CrawledSite.SiteToCrawl.Uri);
};
_crawlerEngine.CrawlerInstanceCreated += (sender, eventArgs) =>
{
eventArgs.Crawler.CrawlBag = eventArgs.SiteToCrawl.SiteBag;
//Register for crawler level events. These are Abot's events!!!
eventArgs.Crawler.PageCrawlCompleted += (abotSender, abotEventArgs) =>
{
var crawlX = abotSender as CrawlerX;
CrawledPage crawledPage = abotEventArgs.CrawledPage;
if (crawledPage.WebException != null || crawledPage.HttpWebResponse.StatusCode != HttpStatusCode.OK)
{
Console.WriteLine("Crawl of page failed {0}", crawledPage.Uri.AbsoluteUri);
}
else
{
if (string.IsNullOrEmpty(crawledPage.Content.Text))
{
Console.WriteLine("Page had no content {0}", crawledPage.Uri.AbsoluteUri);
}
else
{
try
{
if (crawledPage.CrawlDepth == 1)
{
Console.WriteLine("Depth: {0} --- Crawl of page succeeded {1}", crawledPage.CrawlDepth, crawledPage.Uri.AbsoluteUri);
var item = new CrawledItem()
{
Name = crawlX.CrawlBag.Name,
PageNumber = crawlX.CrawlBag.Number,
Url = crawledPage.Uri.AbsoluteUri,
Detail = crawledPage.Content.Text
};
SqlHelper.Store(new System.Collections.Generic.List <CrawledItem>()
{
item
});
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
//var htmlAgilityPackDocument = crawledPage.HtmlDocument; //Html Agility Pack parser
//var angleSharpHtmlDocument = crawledPage.AngleSharpHtmlDocument; //AngleSharp parser
};
eventArgs.Crawler.ShouldCrawlPage((pageToCrawl, crawlContext) =>
{
CrawlDecision decision = new CrawlDecision {
Allow = true
};
var isCrawlDepth1 = pageToCrawl.CrawlDepth == 0 && !pageToCrawl.Uri.AbsoluteUri.Contains("www.baidu.com/s?wd");
var isCrawlDepth2 = pageToCrawl.CrawlDepth == 1 && !pageToCrawl.Uri.AbsoluteUri.Contains("www.baidu.com/link");
if (isCrawlDepth1 || isCrawlDepth2)
{
return new CrawlDecision {
Allow = false, Reason = "Dont want to crawl google pages"
}
}
;
return(decision);
});
};
_crawlerEngine.StartAsync();
}
