/// <summary>
/// Async callback for webclients get file operation
/// ,gets called if the file was retrieved successfully
/// </summary>
/// <param name="sender">event sending webclient instance</param>
/// <param name="e">event arguments of the download operation</param>
private void DownloadFileCallback(object sender, DownloadDataCompletedEventArgs e)
{
try
{
if (e.Cancelled)
{
return;
}
if (e.Result == null || e.Result.Length == 0)
{
error_code = Connection.ErrorCodes.UrlNotFound;
Console.WriteLine("Error downloading hublist.");
if (UnableToFetch != null)
{
UnableToFetch(this);
}
return;
}
//Console.WriteLine("Error:"+e.Error.Data.Values.ToString());
//if its a bz2 uncompress the data stream
//Stream input = new StreamReader(e.Result);
byte[] input_bytes = e.Result;
ProcessDownloadedBytes(input_bytes);
}
catch (Exception ex)
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine("exception during hublist fetch: " + ex.Message);
if (UnableToFetch != null)
{
UnableToFetch(this);
}
busy = false;
}
}
/// <summary>
/// Start fetching a hublist
/// needs url to point to a valid hublist to complete successfully
/// [Non Blocking]
/// </summary>
public void FetchHubs()
{
if (!busy && !string.IsNullOrEmpty(url))
{
busy = true;
//hubs.Clear();
columns.Clear();
percentage = 0;
if (ProgressChanged != null)
{
ProgressChanged(this);
}
try
{
wc.DownloadDataAsync(new Uri(url));
}
catch (Exception ex)
{
Console.WriteLine("Exception occured during download: " + ex.Message);
error_code = Connection.ErrorCodes.Exception;
if (UnableToFetch != null)
{
UnableToFetch(this);
}
busy = false;
}
}
}
/// <summary>
/// Async callback for webclients get file operation
/// ,gets called if the file was retrieved successfully
/// </summary>
/// <param name="sender">event sending webclient instance</param>
/// <param name="e">event arguments of the download operation</param>
private void DownloadFileCallback(object sender, DownloadDataCompletedEventArgs e)
{
try
{
if (e.Cancelled) return;
//ASCIIEncoding ascii = new ASCIIEncoding();
//UTF8Encoding utf = new UTF8Encoding();
//string page_string = utf.GetString(e.Result);
if (e.Result.Length <= 0) return;
string page_string = "";
try
{
page_string = System.Text.Encoding.Default.GetString(e.Result);
}
catch (Exception ex)
{
Console.WriteLine("Exception after download: " + ex.Message);
return;
}
int start = page_string.IndexOf("<h1>Your IP address is<BR>\n");
if (start != -1)
{
string temp_ip = page_string.Substring(start + "<h1>Your IP address is<BR>".Length);
int end = temp_ip.IndexOf("</h1>");
if (end != -1)
{
temp_ip = temp_ip.Substring(0, end);
char[] trims = { '\n', ' ' };
temp_ip = temp_ip.Trim(trims);
//Console.WriteLine("temp_ip: '"+temp_ip+"'");
my_ip = temp_ip;
busy = false;
try
{
if (Completed != null)
Completed(this);
}
catch (Exception ex)
{
Console.WriteLine("Exception during callback of own external ip resolve: " + ex.Message);
}
}
}
}
catch (Exception out_ex)
{
Console.WriteLine("Exception during download of ip page: "+out_ex.Message);
error_code = Connection.ErrorCodes.Exception;
if (UnableToFetch != null)
UnableToFetch(this);
}
}
/// <summary>
/// Read a hublist from a xml string
/// </summary>
/// <param name="xml">the xml representation of a hublist</param>
private bool ReadXmlStringAsync(string xml)
{
XmlDocument doc = new XmlDocument();
bool try_again = false;
try
{
//Console.WriteLine("Starting to parse xml data.");
doc.LoadXml(xml);
//Console.WriteLine("Finished parsing.");
}
catch (XmlException xe)
{
string error_message = "Unexpected end of file has occurred. The following elements are not closed: ";
if (xe.Message.StartsWith(error_message))
{
string tags = xe.Message.Substring(error_message.Length);
int end = tags.IndexOf(".");
if (end != -1)
{
tags = tags.Substring(0, end);
int last = 0;
int split = 0;
while ((split = tags.IndexOf(",", split)) != -1)
{
string tag = tags.Substring(last, split);
last = split + 1;
split++;
//int line = xe.LineNumber;
tag = tag.Trim();
xml = xml + "</" + tag + ">\r\n";
}
string last_tag = tags.Substring(last);
last_tag = last_tag.Trim();
xml = xml + "</" + last_tag + ">\r\n";
}
try_again = true;
}
else
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine("xml exception:" + xe.Message);
if (UnableToFetch != null)
UnableToFetch(this);
busy = false;
return (false);
}
}
if (try_again)
{
try
{
//Console.WriteLine("Starting to parse xml data for a second time.");
doc.LoadXml(xml);
//Console.WriteLine("Finished parsing.");
}
catch (XmlException xe)
{
Console.WriteLine("xml exception:" + xe.Message);
return (false);
}
}
//TODO change this to a non xpath workarround version
try
{
XmlNodeList nodelist = doc.SelectNodes("/");
foreach (XmlNode node in nodelist)
{
if (node.HasChildNodes)
{
foreach (XmlNode child in node.ChildNodes)
{
if (child.Name.Equals("Hublist")) ReadHubList(child);
}
}
}
}
catch (XmlException xmle)
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine(xmle.Message);
if (UnableToFetch != null)
UnableToFetch(this);
busy = false;
return (false);
}
return (true);
}
/// <summary>
/// Process the downloaded bytes from the webserver
/// (uncompressing and reading of xml hublist)
/// </summary>
/// <param name="input_bytes">array of bytes received from a webserver</param>
private void ProcessDownloadedBytesAsync(byte[] input_bytes)
{
MemoryStream input = new MemoryStream(input_bytes);
MemoryStream output = new MemoryStream();
ASCIIEncoding ascii = new ASCIIEncoding();
UTF8Encoding utf = new UTF8Encoding();
UnicodeEncoding unicode = new UnicodeEncoding();
try
{
ICSharpCode.SharpZipLib.BZip2.BZip2.Decompress(input, output);
}
catch (Exception ex)
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine("Error uncompressing hublist: " + ex.Message);
if (UnableToFetch != null)
UnableToFetch(this);
busy = false;
return;
}
input.Flush();
byte[] out_data = output.GetBuffer();
//string hubs_string = ascii.GetString(out_data);
string hubs_string = System.Text.Encoding.Default.GetString(out_data);
//string hubs_string = utf.GetString(out_data);
int end = hubs_string.IndexOf((char)0);
if (end != -1) hubs_string = hubs_string.Remove(end);
//string hubs_string = unicode.GetString(out_data);
for (int i = 0; i < 0x1f; i++)
if (i != 0x09 && i != 0x0a && i != 0x0d) hubs_string = hubs_string.Replace((char)i, ' ');//"�"+i+";"
hubs_string = hubs_string.Replace("&", "&"); // TODO change this ---- no good solution would change & to &amp;
bool inside_quotes = false;
for (int i = 0; i < hubs_string.Length; i++)
{
if (hubs_string[i] == '\"' && inside_quotes == false)
{
inside_quotes = true;
}
else if (hubs_string[i] == '\"' && inside_quotes == true)
{
inside_quotes = false;
}
if (inside_quotes && hubs_string[i] == '<')
{
hubs_string = hubs_string.Remove(i, 1);
hubs_string = hubs_string.Insert(i, "<");
}
if (inside_quotes && hubs_string[i] == '>')
{
hubs_string = hubs_string.Remove(i, 1);
hubs_string = hubs_string.Insert(i, ">");
}
if (inside_quotes && hubs_string[i] == ' ')
{
hubs_string = hubs_string.Remove(i, 1);
hubs_string = hubs_string.Insert(i, " ");
}
}
//hubs_string = hubs_string.Replace("&", "&");
//Console.WriteLine(hubs_string);
//File.WriteAllText("hublist.uncompressed.xml", hubs_string);
//output.Position = 0;
ReadXmlStringAsync(hubs_string);
/*busy = false;
if (Completed != null)
Completed(this);*/
}
/// <summary>
/// Async callback for webclients get file operation
/// ,gets called if the file was retrieved successfully
/// </summary>
/// <param name="sender">event sending webclient instance</param>
/// <param name="e">event arguments of the download operation</param>
private void DownloadFileCallback(object sender, DownloadDataCompletedEventArgs e)
{
try
{
if (e.Cancelled) return;
if (e.Result == null || e.Result.Length == 0)
{
error_code = Connection.ErrorCodes.UrlNotFound;
Console.WriteLine("Error downloading hublist.");
if (UnableToFetch != null)
UnableToFetch(this);
return;
}
//Console.WriteLine("Error:"+e.Error.Data.Values.ToString());
//if its a bz2 uncompress the data stream
//Stream input = new StreamReader(e.Result);
byte[] input_bytes = e.Result;
ProcessDownloadedBytes(input_bytes);
}
catch (Exception ex)
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine("exception during hublist fetch: " + ex.Message);
if (UnableToFetch != null)
UnableToFetch(this);
busy = false;
}
}
/// <summary>
/// Start fetching a hublist
/// needs url to point to a valid hublist to complete successfully
/// [Non Blocking]
/// </summary>
public void FetchHubs()
{
if (!busy && !string.IsNullOrEmpty(url))
{
busy = true;
//hubs.Clear();
columns.Clear();
percentage = 0;
if (ProgressChanged != null)
ProgressChanged(this);
try
{
wc.DownloadDataAsync(new Uri(url));
}
catch (Exception ex)
{
Console.WriteLine("Exception occured during download: " + ex.Message);
error_code = Connection.ErrorCodes.Exception;
if (UnableToFetch != null)
UnableToFetch(this);
busy = false;
}
}
}
/// <summary>
/// Async callback for webclients get file operation
/// ,gets called if the file was retrieved successfully
/// </summary>
/// <param name="sender">event sending webclient instance</param>
/// <param name="e">event arguments of the download operation</param>
private void DownloadFileCallback(object sender, DownloadDataCompletedEventArgs e)
{
try
{
if (e.Cancelled) return;
if (e.Result.Length <= 0) return;
string page_string = "";
page_string = System.Text.Encoding.Default.GetString(e.Result);
//Console.WriteLine("port page: " + page_string);
int start = page_string.IndexOf("<strong class=\"");
if (start != -1)
{
string temp = page_string.Substring(start + "<strong class=\"".Length);
int end = temp.IndexOf("\"");
if (end != -1)
{
string tcp = temp.Substring(0, end);
if (tcp == "green small")
OpenPorts = Ports.Tcp;
else OpenPorts = Ports.None;
start = temp.IndexOf("<strong class=\"");
if (start != -1)
{
string temp2 = temp.Substring(start + "<strong class=\"".Length);
end = temp2.IndexOf("\"");
if (end != -1)
{
string udp = temp2.Substring(0, end);
if (udp == "green small" && OpenPorts == Ports.None)
OpenPorts = Ports.Udp;
if (udp == "green small" && OpenPorts == Ports.Tcp)
OpenPorts = Ports.UdpAndTcp;
busy = false;
if (Completed != null)
Completed(this);
}
}
}
}
}
catch (Exception out_ex)
{
Console.WriteLine("Exception during download of port page: " + out_ex.Message);
error_code = Connection.ErrorCodes.Exception;
if (UnableToFetch != null)
UnableToFetch(this);
}
}
/// <summary>
/// Read a hublist from a xml string
/// </summary>
/// <param name="xml">the xml representation of a hublist</param>
private bool ReadXmlStringAsync(string xml)
{
XmlDocument doc = new XmlDocument();
bool try_again = false;
try
{
//Console.WriteLine("Starting to parse xml data.");
doc.LoadXml(xml);
//Console.WriteLine("Finished parsing.");
}
catch (XmlException xe)
{
string error_message = "Unexpected end of file has occurred. The following elements are not closed: ";
if (xe.Message.StartsWith(error_message))
{
string tags = xe.Message.Substring(error_message.Length);
int end = tags.IndexOf(".");
if (end != -1)
{
tags = tags.Substring(0, end);
int last = 0;
int split = 0;
while ((split = tags.IndexOf(",", split)) != -1)
{
string tag = tags.Substring(last, split);
last = split + 1;
split++;
//int line = xe.LineNumber;
tag = tag.Trim();
xml = xml + "</" + tag + ">\r\n";
}
string last_tag = tags.Substring(last);
last_tag = last_tag.Trim();
xml = xml + "</" + last_tag + ">\r\n";
}
try_again = true;
}
else
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine("xml exception:" + xe.Message);
if (UnableToFetch != null)
{
UnableToFetch(this);
}
busy = false;
return(false);
}
}
if (try_again)
{
try
{
//Console.WriteLine("Starting to parse xml data for a second time.");
doc.LoadXml(xml);
//Console.WriteLine("Finished parsing.");
}
catch (XmlException xe)
{
Console.WriteLine("xml exception:" + xe.Message);
return(false);
}
}
//TODO change this to a non xpath workarround version
try
{
XmlNodeList nodelist = doc.SelectNodes("/");
foreach (XmlNode node in nodelist)
{
if (node.HasChildNodes)
{
foreach (XmlNode child in node.ChildNodes)
{
if (child.Name.Equals("Hublist"))
{
ReadHubList(child);
}
}
}
}
}
catch (XmlException xmle)
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine(xmle.Message);
if (UnableToFetch != null)
{
UnableToFetch(this);
}
busy = false;
return(false);
}
return(true);
}
/// <summary>
/// Process the downloaded bytes from the webserver
/// (uncompressing and reading of xml hublist)
/// </summary>
/// <param name="input_bytes">array of bytes received from a webserver</param>
private void ProcessDownloadedBytesAsync(byte[] input_bytes)
{
MemoryStream input = new MemoryStream(input_bytes);
MemoryStream output = new MemoryStream();
ASCIIEncoding ascii = new ASCIIEncoding();
UTF8Encoding utf = new UTF8Encoding();
UnicodeEncoding unicode = new UnicodeEncoding();
try
{
ICSharpCode.SharpZipLib.BZip2.BZip2.Decompress(input, output);
}
catch (Exception ex)
{
error_code = Connection.ErrorCodes.Exception;
Console.WriteLine("Error uncompressing hublist: " + ex.Message);
if (UnableToFetch != null)
{
UnableToFetch(this);
}
busy = false;
return;
}
input.Flush();
byte[] out_data = output.GetBuffer();
//string hubs_string = ascii.GetString(out_data);
string hubs_string = System.Text.Encoding.Default.GetString(out_data);
//string hubs_string = utf.GetString(out_data);
int end = hubs_string.IndexOf((char)0);
if (end != -1)
{
hubs_string = hubs_string.Remove(end);
}
//string hubs_string = unicode.GetString(out_data);
for (int i = 0; i < 0x1f; i++)
{
if (i != 0x09 && i != 0x0a && i != 0x0d)
{
hubs_string = hubs_string.Replace((char)i, ' '); //"�"+i+";"
}
}
hubs_string = hubs_string.Replace("&", "&"); // TODO change this ---- no good solution would change & to &amp;
bool inside_quotes = false;
for (int i = 0; i < hubs_string.Length; i++)
{
if (hubs_string[i] == '\"' && inside_quotes == false)
{
inside_quotes = true;
}
else if (hubs_string[i] == '\"' && inside_quotes == true)
{
inside_quotes = false;
}
if (inside_quotes && hubs_string[i] == '<')
{
hubs_string = hubs_string.Remove(i, 1);
hubs_string = hubs_string.Insert(i, "<");
}
if (inside_quotes && hubs_string[i] == '>')
{
hubs_string = hubs_string.Remove(i, 1);
hubs_string = hubs_string.Insert(i, ">");
}
if (inside_quotes && hubs_string[i] == ' ')
{
hubs_string = hubs_string.Remove(i, 1);
hubs_string = hubs_string.Insert(i, " ");
}
}
//hubs_string = hubs_string.Replace("&", "&");
//Console.WriteLine(hubs_string);
//File.WriteAllText("hublist.uncompressed.xml", hubs_string);
//output.Position = 0;
ReadXmlStringAsync(hubs_string);
/*busy = false;
* if (Completed != null)
* Completed(this);*/
}
/// <summary>
/// Async callback for webclients get file operation
/// ,gets called if the file was retrieved successfully
/// </summary>
/// <param name="sender">event sending webclient instance</param>
/// <param name="e">event arguments of the download operation</param>
private void DownloadFileCallback(object sender, DownloadDataCompletedEventArgs e)
{
try
{
if (e.Cancelled)
{
return;
}
if (e.Result.Length <= 0)
{
return;
}
string page_string = "";
page_string = System.Text.Encoding.Default.GetString(e.Result);
//Console.WriteLine("port page: " + page_string);
int start = page_string.IndexOf("<strong class=\"");
if (start != -1)
{
string temp = page_string.Substring(start + "<strong class=\"".Length);
int end = temp.IndexOf("\"");
if (end != -1)
{
string tcp = temp.Substring(0, end);
if (tcp == "green small")
{
OpenPorts = Ports.Tcp;
}
else
{
OpenPorts = Ports.None;
}
start = temp.IndexOf("<strong class=\"");
if (start != -1)
{
string temp2 = temp.Substring(start + "<strong class=\"".Length);
end = temp2.IndexOf("\"");
if (end != -1)
{
string udp = temp2.Substring(0, end);
if (udp == "green small" && OpenPorts == Ports.None)
{
OpenPorts = Ports.Udp;
}
if (udp == "green small" && OpenPorts == Ports.Tcp)
{
OpenPorts = Ports.UdpAndTcp;
}
busy = false;
if (Completed != null)
{
Completed(this);
}
}
}
}
}
}
catch (Exception out_ex)
{
Console.WriteLine("Exception during download of port page: " + out_ex.Message);
error_code = Connection.ErrorCodes.Exception;
if (UnableToFetch != null)
{
UnableToFetch(this);
}
}
}
/// <summary>
/// Async callback for webclients get file operation
/// ,gets called if the file was retrieved successfully
/// </summary>
/// <param name="sender">event sending webclient instance</param>
/// <param name="e">event arguments of the download operation</param>
private void DownloadFileCallback(object sender, DownloadDataCompletedEventArgs e)
{
try
{
if (e.Cancelled) return;
//ASCIIEncoding ascii = new ASCIIEncoding();
//UTF8Encoding utf = new UTF8Encoding();
//string page_string = utf.GetString(e.Result);
if (e.Result.Length <= 0) return;
string page_string = "";
try
{
page_string = System.Text.Encoding.Default.GetString(e.Result);
}
catch (Exception ex)
{
Console.WriteLine("Exception after download: " + ex.Message);
return;
}
int start = page_string.IndexOf("<h1>Your IP address is<BR>\n");
if (start != -1)
{
string temp_ip = page_string.Substring(start + "<h1>Your IP address is<BR>".Length);
int end = temp_ip.IndexOf("</h1>");
if (end != -1)
{
temp_ip = temp_ip.Substring(0, end);
char[] trims = { '\n', ' ' };
temp_ip = temp_ip.Trim(trims);
//Console.WriteLine("temp_ip: '"+temp_ip+"'");
my_ip = temp_ip;
busy = false;
try
{
if (Completed != null)
Completed(this);
}
catch (Exception ex)
{
Console.WriteLine("Exception during callback of own external ip resolve: " + ex.Message);
}
}
}
}
catch (Exception out_ex)
{
Console.WriteLine("Exception during download of ip page: "+out_ex.Message);
error_code = Connection.ErrorCodes.Exception;
if (UnableToFetch != null)
UnableToFetch(this);
}
}
