public void clearQ()
{
getReference g = new getReference();
CloudQueue queue = g.getQueue();
queue.Clear();
}
private HashSet <String> getAllHtml(List <String> o)
{
List <String> oldList = o;
HashSet <String> htmlList = new HashSet <String>();
int count = 0;
getReference g = new getReference();
CloudQueue queue = g.getQueue();
while (count < oldList.Count)
{
WebClient web = new WebClient();
String html = web.DownloadString(oldList.ElementAt(count));
MatchCollection m1 = Regex.Matches(html, @"<loc>\s*(.+?)\s*</loc>", RegexOptions.Singleline);
String index = oldList.ElementAt(count);
foreach (Match m in m1)
{
String url = m.Groups[1].Value;
if (url.Contains("xml") && ((url.Contains("2015") || !url.Contains("-20"))))
{
oldList.Add(url);
}
if (!url.Contains("xml"))
{
CloudQueueMessage message = new CloudQueueMessage(url);
queue.AddMessageAsync(message);
htmlList.Add(url);
}
}
count++;
}
return(htmlList);
}
public void crawlRobots()
{
List <String> noRobots = new List <String>();
HashSet <String> allHtml = new HashSet <String>();
var wc = new WebClient();
String robot = "http://www.cnn.com/robots.txt";
int count = 0;
List <String> yesRobots = new List <String>();
getReference g = new getReference();
CloudQueue queue = g.getQueue();
for (int i = 0; i < 2; i++)
{
using (var sourceStream = wc.OpenRead(robot))
{
using (var reader = new StreamReader(sourceStream))
{
while (reader.EndOfStream == false)
{
string line = reader.ReadLine();
if (!line.Contains("User-Agent"))
{
if (line.Contains("Sitemap:"))
{
String newUrl = line.Replace("Sitemap:", "").Trim();
if (robot.Contains("bleacher") && newUrl.Contains("nba"))
{
yesRobots.Add(newUrl);
}
else if (robot.Contains("cnn"))
{
yesRobots.Add(newUrl);
}
}
if (line.Contains("Disallow:"))
{
String newUrl = line.Replace("Disallow:", "").Trim();
if (robot.Contains("bleacher"))
{
newUrl = "http://bleacherreport.com" + newUrl + "/";
}
else
{
newUrl = "http://cnn.com" + newUrl + "/";
}
noRobots.Add(newUrl);
}
}
}
}
}
count++;
robot = "http://www.cnn.com/robots.txt";
}
allHtml = getAllHtml(yesRobots);
crawlerUrls(allHtml, noRobots);
}
public String getQueueCount()
{
getReference g = new getReference();
CloudQueue queue = g.getQueue();
queue.CreateIfNotExists();
queue.FetchAttributes();
int approximateMessagesCount = queue.ApproximateMessageCount.Value;
return("" + approximateMessagesCount);
}
public void stopCrawl()
{
getReference g = new getReference();
CloudQueue queue = g.commandQueue();
queue.CreateIfNotExists();
CloudQueueMessage message = new CloudQueueMessage("stop");
queue.AddMessage(message);
CloudQueue storage = g.getQueue();
storage.Clear();
CloudTable table = g.getTable();
table.Delete();
}
private HashSet <String> getAllHtml(List <String> o)
{
List <String> oldList = o;
HashSet <String> htmlList = new HashSet <String>();
int count = 0;
getReference g = new getReference();
CloudQueue queue = g.getQueue();
CloudTable table = g.getTable();
while (count < oldList.Count)
{
WebClient web = new WebClient();
String html = web.DownloadString(oldList.ElementAt(count));
MatchCollection m1 = Regex.Matches(html, @"<loc>\s*(.+?)\s*</loc>", RegexOptions.Singleline);
String index = oldList.ElementAt(count);
foreach (Match m in m1)
{
String url = m.Groups[1].Value;
if (url.Contains("xml") && ((url.Contains("2015") || !url.Contains("-20"))))
{
oldList.Add(url);
}
if (!url.Contains("xml"))
{
crawledTable dashboard = new crawledTable("dash", null, null, null, null, null, "rowkey", 0, null, null, "loading");
TableOperation insertOrReplaceOperation1 = TableOperation.InsertOrReplace(dashboard);
table.Execute(insertOrReplaceOperation1);
CloudQueueMessage message = new CloudQueueMessage(url);
queue.AddMessageAsync(message);
htmlList.Add(url);
}
}
count++;
}
return(htmlList);
}
public void crawlerUrls(HashSet <String> duplicateList, List <String> noRobots)
{
List <String> lastten = new List <String>();
List <String> errorList = new List <String>();
getReference g = new getReference();
CloudQueue queue = g.getQueue();
CloudTable table = g.getTable();
CloudQueue cmd = g.commandQueue();
queue.FetchAttributes();
var limitCount = queue.ApproximateMessageCount.Value;
int tableSize = 0;
while (0 < limitCount)
{
CloudQueueMessage retrievedMessage = queue.GetMessage();
try
{
if (retrievedMessage != null)
{
HtmlWeb web = new HtmlWeb();
HtmlDocument document = web.Load(retrievedMessage.AsString);
String title = "";
HtmlNode node = document.DocumentNode.SelectSingleNode("//title");
if (node != null)
{
HtmlAttribute desc;
desc = node.Attributes["content"];
title = node.InnerHtml;
}
HtmlNode dateNode = document.DocumentNode.SelectSingleNode("//meta[(@itemprop='dateCreated')]");
String date = "";
if (dateNode != null)
{
date = dateNode.GetAttributeValue("content", "");
}
String tenUrls = "";
lastten.Add(retrievedMessage.AsString);
if (lastten.Count == 11)
{
lastten.RemoveAt(0);
tenUrls = String.Join(",", lastten);
}
queue.DeleteMessage(retrievedMessage);
String encodeUrl = EncodeUrlInKey(retrievedMessage.AsString);
float memory = this.theMemCounter.NextValue();
float cpuUtilization = this.cpuload.NextValue();
tableSize++;
String errors = String.Join(",", errorList);
crawledTable ct = new crawledTable("index", retrievedMessage.AsString, title, date, null, null, encodeUrl, 0, null, null, null);
crawledTable dashboard = new crawledTable("dash", retrievedMessage.AsString, title, date, errors, tenUrls, "rowkey", tableSize, memory.ToString(), cpuUtilization + "%", "crawling");
TableOperation insertOrReplaceOperation = TableOperation.InsertOrReplace(ct);
TableOperation insertOrReplaceOperation1 = TableOperation.InsertOrReplace(dashboard);
table.Execute(insertOrReplaceOperation);
table.Execute(insertOrReplaceOperation1);
String root = "";
if (retrievedMessage.AsString.Contains("bleacher"))
{
root = "bleacherreport.com";
}
else if (retrievedMessage.AsString.Contains("cnn"))
{
root = "cnn.com";
}
var rows = document.DocumentNode.SelectNodes("//a[@href]");
if (rows != null && rows.Count > 0)
{
foreach (var link in rows)
{
String url = link.Attributes["href"].Value;
if (url.StartsWith("//"))
{
url = "http:" + url;
}
else if (url.StartsWith("/"))
{
url = "http://" + root + url;
}
Boolean isAllowed = true;
for (int i = 0; i < noRobots.Count; i++)
{
String disallowedUrl = noRobots[i];
if (url.Contains(disallowedUrl))
{
isAllowed = false;
break;
}
}
if (!duplicateList.Contains(url) && isAllowed && (url.Contains(root + "/")))
{
duplicateList.Add(url);
CloudQueueMessage message = new CloudQueueMessage(url);
queue.AddMessageAsync(message);
}
}
}
}
}
catch (Exception e)
{
string errorMessage = "Url: " + retrievedMessage.AsString + " problem is: " + e.Message;
if (!errorList.Contains(errorMessage))
{
errorList.Add(e.Message);
}
}
queue.FetchAttributes();
limitCount = queue.ApproximateMessageCount.Value;
}
}
public void crawlerUrls(HashSet <String> duplicateList, List <String> noRobots)
{
HashSet <String> urlList = duplicateList;
List <String> lastten = new List <String>();
getReference g = new getReference();
CloudQueue queue = g.getQueue();
CloudTable table = g.getTable();
CloudQueue cmd = g.commandQueue();
queue.FetchAttributes();
var limitCount = queue.ApproximateMessageCount.Value;
int count = 0;
while (0 < limitCount)
{
CloudQueueMessage retrievedMessage = queue.GetMessage();
try
{
if (retrievedMessage != null)
{
HtmlWeb web = new HtmlWeb();
HtmlDocument document = web.Load(retrievedMessage.AsString);
String title = "";
HtmlNode node = document.DocumentNode.SelectSingleNode("//title");
if (node != null)
{
HtmlAttribute desc;
desc = node.Attributes["content"];
title = node.InnerHtml;
}
HtmlNode dateNode = document.DocumentNode.SelectSingleNode("//meta[(@itemprop='dateCreated')]");
String date = "";
if (dateNode != null)
{
date = dateNode.GetAttributeValue("content", "");
}
String tenUrls = "";
lastten.Add(retrievedMessage.AsString);
if (lastten.Count == 11)
{
lastten.RemoveAt(0);
tenUrls = String.Join(",", lastten);
}
queue.DeleteMessage(retrievedMessage);
String encodeUrl = EncodeUrlInKey(retrievedMessage.AsString);
crawledTable ct = new crawledTable("index", retrievedMessage.AsString, null, date, null, null, encodeUrl, 0, null, null, null);
crawledTable dashboard = new crawledTable("dash", retrievedMessage.AsString, title, date, "DASHBOARD", tenUrls, "rowkey", 0, null, null, null);
TableOperation insertOrReplaceOperation = TableOperation.InsertOrReplace(ct);
TableOperation insertOrReplaceOperation1 = TableOperation.InsertOrReplace(dashboard);
table.Execute(insertOrReplaceOperation);
table.Execute(insertOrReplaceOperation1);
String root = "";
if (retrievedMessage.AsString.Contains("bleacher"))
{
root = "bleacherreport.com";
}
else if (retrievedMessage.AsString.Contains("cnn"))
{
root = "cnn.com";
}
var rows = document.DocumentNode.SelectNodes("//a[@href]");
if (rows != null && rows.Count > 0)
{
foreach (var link in rows)
{
String url = link.Attributes["href"].Value;
if (url.StartsWith("//"))
{
url = "http:" + url;
}
else if (url.StartsWith("/"))
{
url = "http://" + root + url;
}
if (!urlList.Contains(url) && !noRobots.Contains(url) && (url.Contains(root + "/")))
{
urlList.Add(url);
CloudQueueMessage message = new CloudQueueMessage(url);
queue.AddMessageAsync(message);
}
}
}
queue.FetchAttributes();
limitCount = queue.ApproximateMessageCount.Value;
}
}
catch (WebException e)
{
queue.DeleteMessage(retrievedMessage);
crawledTable ct = new crawledTable("error", retrievedMessage.AsString, "No Title", "No date", e.Status.ToString(), null, "error url", 0, null, null, null);
TableOperation insertOrReplaceOperation = TableOperation.InsertOrReplace(ct);
table.Execute(insertOrReplaceOperation);
}
}
}