public WebCrawler(List <string> CNNRules, List <string> BleacherReportRules)
{
LoadQueue = CloudConfiguration.GetLoadingQueue();
CrawlQueue = CloudConfiguration.GetCrawlingQueue();
Table = CloudConfiguration.GetTable();
this.CNNRules = CNNRules;
this.BleacherReportRules = BleacherReportRules;
this.VisitedLinks = new HashSet <string>();
OldestAllowed = new DateTime(2016, 12, 1);
BadExtensions = new List <string> {
".jpg"
};
}
public override void Run()
{
CloudQueue LoadQueue = CloudConfiguration.GetLoadingQueue();
CloudQueue CrawlQueue = CloudConfiguration.GetCrawlingQueue();
CloudQueue StopQueue = CloudConfiguration.GetStopQueue();
CloudTable Table = CloudConfiguration.GetTable();
List <string> CNNRules = ProcessRobots("http://www.cnn.com/robots.txt");
List <string> BleacherReportRules = ProcessRobots("http://www.bleacherreport.com/robots.txt");
WebCrawler Crawler = new WebCrawler(CNNRules, BleacherReportRules);
State = "Idle";
Thread.Sleep(10000);
CloudQueueMessage stopMessage = StopQueue.GetMessage();
CPUCount = new PerformanceCounter("Processor", "% Processor Time", "_Total");
MemCount = new PerformanceCounter("Memory", "Available MBytes");
while (true)
{
while (stopMessage == null)
{
// Get the next message
CloudQueueMessage loadMessage = LoadQueue.GetMessage();
if (loadMessage != null)
{
State = "Loading";
string message = loadMessage.AsString;
Crawler.ProcessURL(message);
LoadQueue.DeleteMessage(loadMessage);
}
else if (State.Equals("Loading") || State.Equals("Crawling"))
{
CloudQueueMessage crawlMessage = CrawlQueue.GetMessage();
// dequeue crawl message
if (crawlMessage != null)
{
State = "Crawling";
Crawler.ProcessURL(crawlMessage.AsString);
CrawlQueue.DeleteMessage(crawlMessage);
}
}
stopMessage = StopQueue.GetMessage();
}
State = "Idle";
}
}
public string StartCrawler()
{
StopQueue = CloudConfiguration.GetStopQueue();
StateQueue = CloudConfiguration.GetStateQueue();
if (StopQueue.PeekMessage() == null)
{
LoadQueue = CloudConfiguration.GetLoadingQueue();
CloudQueueMessage startMessage =
new CloudQueueMessage("http://www.cnn.com/robots.txt http://www.bleacherreport.com/robots.txt");
LoadQueue.AddMessage(startMessage);
CloudQueueMessage state = new CloudQueueMessage("Loading");
}
else
{
StopQueue.DeleteMessage(StopQueue.GetMessage());
}
return("start crawler method executed");
}
public string StartCrawler()
{
StopQueue = CloudConfiguration.GetStopQueue();
CloudQueueMessage stopMessage = StopQueue.GetMessage();
while (stopMessage != null)
{
StopQueue.DeleteMessage(stopMessage);
stopMessage = StopQueue.GetMessage();
}
LoadQueue = CloudConfiguration.GetLoadingQueue();
//Add message
CloudQueueMessage cnnRobots = new CloudQueueMessage("http://www.cnn.com/robots.txt");
LoadQueue.AddMessage(cnnRobots);
CloudQueueMessage bleacherReportRobots = new CloudQueueMessage("http://www.bleacherreport.com/robots.txt");
LoadQueue.AddMessage(bleacherReportRobots);
return(LoadQueue.Name + " " + cnnRobots.AsString + " " + bleacherReportRobots.AsString);
}
public override void Run()
{
Storage = new AzureStorage();
LoadQueue = CloudConfiguration.GetLoadingQueue();
CrawlQueue = CloudConfiguration.GetCrawlingQueue();
StopQueue = CloudConfiguration.GetStopQueue();
SiteDataTable = CloudConfiguration.GetSiteDataTable();
AdminStatusTable = CloudConfiguration.GetAdminStatusTable();
StateQueue = CloudConfiguration.GetStateQueue();
State = "Idle";
CPUCount = new PerformanceCounter("Processor", "% Processor Time", "_Total");
MemCount = new PerformanceCounter("Memory", "Available MBytes");
Status = new AdminStatus(State, (int)CPUCount.NextValue(), (int)MemCount.NextValue());
string[] robots = { "http://www.cnn.com/robots.txt", "http://www.bleacherreport.com/robots.txt" };
Crawler = new WebCrawler(robots, Storage);
Thread.Sleep(10000);
string url = "";
while (true)
{
CloudQueueMessage stopMessage = StopQueue.GetMessage();
while (stopMessage == null)
{
// Get the next message
CloudQueueMessage loadMessage = LoadQueue.GetMessage();
State = "Loading";
if (loadMessage != null)
{
State = "Loading";
url = loadMessage.AsString;
if (url.Contains("robots.txt"))
{
string[] robotLinks = url.Split(null);
foreach (string link in robotLinks)
{
Crawler.ProcessURL(link);
}
LoadQueue.DeleteMessage(loadMessage);
}
else
{
Crawler.ProcessURL(url);
}
}
else if (State.Equals("Loading") || State.Equals("Crawling"))
{
CloudQueueMessage crawlMessage = CrawlQueue.GetMessage();
// dequeue crawl message
if (crawlMessage != null)
{
State = "Crawling";
url = crawlMessage.AsString;
Crawler.ProcessURL(url);
CrawlQueue.DeleteMessage(crawlMessage);
}
}
stopMessage = StopQueue.GetMessage();
UpdateDashboard(url);
}
State = "Idle";
}
}