private void SetupStartingLinks()
{
List<string> urlsList = new List<string>();
urlsList.Add("http://www.cs.put.poznan.pl/rwalkowiak/");
urlsList.Add("http://www.anthonystruk.com/");
urlsList.Add("http://www.cs.put.poznan.pl/mkalewski/");
QueryLink l1 = new QueryLink(urlsList[0], 1);
QueryLink l2 = new QueryLink(urlsList[1], 1);
QueryLink l3 = new QueryLink(urlsList[2], 1);
TO_SEARCH.Add(l1);
TO_SEARCH.Add(l2);
TO_SEARCH.Add(l3);
}
private void IndexPages()
{
this.rtbServer.AppendText("starting indexing routine" + Environment.NewLine);
SQLiteConnection connection;
connection = new SQLiteConnection("Data Source=Words.sqlite;Version=3;");
connection.Open();
//clear the table
string delete = "delete from websites";
string vacuum = "vacuum";
SQLiteCommand delete_com = new SQLiteCommand(delete, connection);
delete_com.ExecuteNonQuery();
SQLiteCommand vacuum_com = new SQLiteCommand(vacuum, connection);
vacuum_com.ExecuteNonQuery();
while (TO_SEARCH.Any())
{
using (WebClient client = new WebClient())
{
string url = TO_SEARCH.First().GetUrl();
Console.WriteLine(url);
//get original html from first list element
string html;
try
{
html = client.DownloadString(url);
//get plain text without spaces
string text = GetPureTextFromHTML(html);
//remove markups and split text
text = Regex.Replace(text, @"\s+", "");
text = Regex.Replace(text, @"\t|\n|\r", @"\s");
text = Regex.Replace(text, @"'", "");
text = Regex.Replace(text, @"[\u0000-\u001F]", string.Empty); //remove non-ascii characters
List<string> rawLinks = GetLinks(html);
//good links
List<string> currPageLinks = CorrectLinks(rawLinks, url);
//depth of first element
int depth = TO_SEARCH.First().GetDepth();
Console.WriteLine(TO_SEARCH.Count);
if (depth <= SEARCH_DEPTH)
{
foreach (string link in currPageLinks)
{
QueryLink temp_link = new QueryLink(link, depth + 1);
TO_SEARCH.Add(temp_link);//append at the end
}
}
else
{
TO_SEARCH.RemoveAt(0);
}
//add to db!!
string sql = "insert or ignore into websites (url, content) values";
sql = sql + "('" + url + "', " + "'" + text + "')";
SQLiteCommand command = new SQLiteCommand(sql, connection);
command.ExecuteNonQuery();
}
catch (Exception)
{
TO_SEARCH.RemoveAt(0);
continue;
}
//remove first element - the one we worked with
if (TO_SEARCH.Any())
TO_SEARCH.RemoveAt(0);
else break;
}
}
this.rtbServer.AppendText("finished" + Environment.NewLine);
connection.Close();
}
