private void ProcessXML(string URL)
{
HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(URL);
httpRequest.Timeout = 10000; // 10 secs
httpRequest.UserAgent = "Code Sample Web Client";
HttpWebResponse webResponse = (HttpWebResponse)httpRequest.GetResponse();
var stream = new StreamReader(webResponse.GetResponseStream());
XmlDocument xmlDoc = new XmlDocument(); // Create an XML document object
xmlDoc.Load(stream);
// Get elements
XmlNodeList elements = xmlDoc.GetElementsByTagName("sitemap");
if (elements.Count == 0)
{
elements = xmlDoc.GetElementsByTagName("url");
}
for (int i = 0; i < elements.Count; i++)
{
var link = elements[i].ChildNodes[0].InnerText;
bool correctDate = true;
if (elements[i].LastChild.InnerText != link)
{
var date = elements[i].ChildNodes[1].InnerText;
correctDate = CheckLinkIsRecent(link, date);
}
if (CheckLinkDomain(link) && CheckLinkIsCorrectType(link) && CheckIfAllowed(link) && correctDate)
{
CloudQueueMessage linkMessage = new CloudQueueMessage(link);
if (link.EndsWith("xml"))
{
LoadQueue.AddMessage(linkMessage);
}
else
{
CrawlQueue.AddMessage(linkMessage);
}
}
}
}
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");
}
private void ProcessTxt(string URL)
{
WebClient client = new WebClient();
string file = client.DownloadString(URL);
string[] lines = file.Split('\n');
HashSet <string> links = new HashSet <string>
(lines.Where(x => x.ToLower().StartsWith("sitemap:"))
.Select(x => x.Substring(x.IndexOf("http"))));
foreach (string link in links)
{
if (CheckLinkDomain(link))
{
CloudQueueMessage message = new CloudQueueMessage(link);
LoadQueue.AddMessage(message);
}
}
}
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);
}
