public Spider(Frontier frontier, Index index, Filtering.Filter filter, Action<Index> callback)
{
this.frontier = frontier;
this.index = Index.CreateEmptyCopy(index);
this.filter = filter;
this.callback = callback;
}
public Spider(Frontier frontier, Index index, Filtering.Filter filter, Action <Index> callback)
{
this.frontier = frontier;
this.index = Index.CreateEmptyCopy(index);
this.filter = filter;
this.callback = callback;
}
public static void StartAndWait(Frontier frontier, Index index, Filtering.Filter filter, int pagecount)
{
int count = (int)Math.Ceiling(pagecount / (double)SPIDER_PAGE_COUNT);
Spider[] spiders = new Spider[count];
Thread[] threads = new Thread[count];
for (int i = 0; i < count; i++)
{
Spider sp = spiders[i] = new Spider(frontier, index, filter, ind =>
{
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("Merging Index of {0}", ind.SiteCount);
Console.ForegroundColor = ConsoleColor.Gray;
lock (index) { index.MergeIn(ind); }
});
threads[i] = new Thread(() => sp.Run());
threads[i].Start();
}
for (int i = 0; i < count; i++)
{
threads[i].Join();
}
}
static void Main(string[] args)
{
Console.WindowWidth += 50;
frontier = new Frontier(new Exclusions());
frontier.Add(new URL("http://en.wikipedia.org/wiki/Teenage_Mutant_Ninja_Turtles"));
Filter filter = new DomainFilter("en.wikipedia.org") & new ExtentionFilter(false, "jpg", "jpeg", "gif", "png", "rar", "zip", "exe", "pdf");
DateTime start = DateTime.Now;
Crawler.StartAndWait(frontier, index, filter, 100);
DateTime end = DateTime.Now;
Console.WriteLine("Crawler done in {0:0.00} sec ({1:0.00} pages per sec).", (end - start).TotalSeconds, index.SiteCount / (end - start).TotalSeconds);
Console.WriteLine("Press any key to start querying.");
Console.ReadKey(true);
Console.WriteLine();
start = DateTime.Now;
Ranker r = new Ranker(index, TrimmingStemmer.GetStemmer(PorterStemmer.StemTerm));
end = DateTime.Now;
Console.WriteLine("Ranker created in {0:0.00} sec.", (end - start).TotalSeconds);
string searchQuery = "";
while (true)
{
Console.WriteLine("Query for data below. Enter an empty string to quit.");
Console.Write("Search for: ");
searchQuery = Console.ReadLine();
if (searchQuery == "")
{
break;
}
start = DateTime.Now;
foreach (var doc in r.GetHits(searchQuery).OrderByDescending(x => x.Item2))
{
Console.WriteLine("Rank: {1:0.000000} for: {0}", doc.Item1.URL.Address, doc.Item2);
}
end = DateTime.Now;
Console.WriteLine("Query completed in {0:0.00} sec", (end - start).TotalSeconds);
Console.WriteLine();
}
frontier.Kill();
}
public ThreadCrawler(Frontier frontier)
{
_frontier = frontier;
// setup http
var socketsHandler = new SocketsHttpHandler
{
AllowAutoRedirect = true,
PooledConnectionLifetime = TimeSpan.FromSeconds(60),
PooledConnectionIdleTimeout = TimeSpan.FromMinutes(5),
MaxConnectionsPerServer = _maxConnectionsPerServer
};
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
_httpClient = new HttpClient(socketsHandler);
_httpClient.Timeout = TimeSpan.FromSeconds(_urlTimeout);
_httpClient.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)");
}
static void Main(string[] args)
{
Console.WindowWidth += 50;
frontier = new Frontier(new Exclusions());
frontier.Add(new URL("http://en.wikipedia.org/wiki/Teenage_Mutant_Ninja_Turtles"));
Filter filter = new DomainFilter("en.wikipedia.org") & new ExtentionFilter(false, "jpg", "jpeg", "gif", "png", "rar", "zip", "exe", "pdf");
DateTime start = DateTime.Now;
Crawler.StartAndWait(frontier, index, filter, 100);
DateTime end = DateTime.Now;
Console.WriteLine("Crawler done in {0:0.00} sec ({1:0.00} pages per sec).", (end - start).TotalSeconds, index.SiteCount / (end - start).TotalSeconds);
Console.WriteLine("Press any key to start querying.");
Console.ReadKey(true);
Console.WriteLine();
start = DateTime.Now;
Ranker r = new Ranker(index, TrimmingStemmer.GetStemmer(PorterStemmer.StemTerm));
end = DateTime.Now;
Console.WriteLine("Ranker created in {0:0.00} sec.", (end - start).TotalSeconds);
string searchQuery = "";
while (true)
{
Console.WriteLine("Query for data below. Enter an empty string to quit.");
Console.Write("Search for: ");
searchQuery = Console.ReadLine();
if (searchQuery == "")
break;
start = DateTime.Now;
foreach (var doc in r.GetHits(searchQuery).OrderByDescending(x => x.Item2))
Console.WriteLine("Rank: {1:0.000000} for: {0}", doc.Item1.URL.Address, doc.Item2);
end = DateTime.Now;
Console.WriteLine("Query completed in {0:0.00} sec", (end - start).TotalSeconds);
Console.WriteLine();
}
frontier.Kill();
}
static async System.Threading.Tasks.Task Main(string[] args)
{
// Start url
string url = "https://www.easv.dk/";
string url2 = "https://www.google.com/search?q=autonomous+agent";
// Initialize frontier and add url
Frontier frontier = new Frontier();
frontier.AddUrl(url);
// Sequential crawler
Crawler smallSpider = new Crawler(frontier);
//smallSpider.StartCrawling();
// Parallel crawler using threads
ThreadCrawler giantHouseSpider = new ThreadCrawler(frontier);
await giantHouseSpider.SendAsync();
}
public static void StartAndWait(Frontier frontier, Index index, Filtering.Filter filter, int pagecount)
{
int count = (int)Math.Ceiling(pagecount / (double)SPIDER_PAGE_COUNT);
Spider[] spiders = new Spider[count];
Thread[] threads = new Thread[count];
for (int i = 0; i < count; i++)
{
Spider sp = spiders[i] = new Spider(frontier, index, filter, ind =>
{
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("Merging Index of {0}", ind.SiteCount);
Console.ForegroundColor = ConsoleColor.Gray;
lock (index) { index.MergeIn(ind); }
});
threads[i] = new Thread(() => sp.Run());
threads[i].Start();
}
for (int i = 0; i < count; i++)
threads[i].Join();
}
public Crawler(Frontier frontier)
{
_frontier = frontier;
}
public void SetFrontier(Frontier frontier)
{
_frontier = frontier;
}
