private bool is_valid_torrent(ref BENObject obj)
{
if (obj.getType() == BENObjectType.Dictionary && obj.getDictonary().ContainsKey(new BENObject("info")))
{
BENObject info = obj.getDictonary()[new BENObject("info")];
if (info.getType() == BENObjectType.Dictionary &&
info.getDictonary().ContainsKey(new BENObject("piece length")) &&
info.getDictonary().ContainsKey(new BENObject("pieces")) &&
info.getDictonary().ContainsKey(new BENObject("name")) &&
(info.getDictonary().ContainsKey(new BENObject("length")) ||
(info.getDictonary().ContainsKey(new BENObject("files")) &&
info.getDictonary()[new BENObject("files")].getType() == BENObjectType.List)))
{
return(true);
}
}
return(false);
}
protected void Page_Load(object sender, EventArgs e)
{
BENObject obj = new BENObject(new Dictionary <BENObject, BENObject>());
if (Request.QueryString["info_hash"] == null)
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Missing info_hash");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(100);
Response.Write(obj.ToString());
return;
}
if (Request.QueryString["peer_id"] == null)
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Missing peer_id");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(102);
Response.Write(obj.ToString());
return;
}
if (Request.QueryString["port"] == null)
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Missing port");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(103);
Response.Write(obj.ToString());
return;
}
string sha = bin2hex(queryBin("info_hash=", Request.RawUrl));
string peer_id = bin2hex(queryBin("peer_id=", Request.RawUrl));
if (sha != null && sha.Length != 40)
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Invalid infohash: infohash is not 20 bytes long");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(150);
Response.Write(obj.ToString());
return;
}
if (peer_id != null && peer_id.Length != 40)
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Invalid peerid: peerid is not 20 bytes long");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(151);
Response.Write(obj.ToString());
return;
}
try {
using (SqlConnection myConnection = new SqlConnection(DatabaseConnectionString))
{
string stmt;
myConnection.Open();
int interval;
if (Int32.TryParse(ConfigurationManager.AppSettings["config_interval"], out interval) == false)
{
interval = 300;
}
stmt = "DELETE FROM peers WHERE date < DATEADD(SECOND, -@interval, GETDATE())";
using (SqlCommand command = new SqlCommand(stmt, myConnection))
{
command.Parameters.AddWithValue("interval", (int)(interval * 1.2));
command.ExecuteScalar();
}
string ip;
if (Request.QueryString["ip"] != null)
{
ip = Request.QueryString["ip"];
}
else
{
ip = GetIPAddress();
}
int port;
Int32.TryParse(Request.QueryString["port"], out port);
if (Request.QueryString["event"] != null && Request.QueryString["event"].Equals("stopped"))
{
stmt = "DELETE FROM peers WHERE sha=@sha AND port=@port AND peer_id=@peer_id";
using (SqlCommand command = new SqlCommand(stmt, myConnection))
{
command.Parameters.AddWithValue("sha", sha);
command.Parameters.AddWithValue("peer_id", peer_id);
command.Parameters.AddWithValue("port", port);
command.ExecuteNonQuery();
return;
}
}
if (Request.QueryString["event"] != null && Request.QueryString["event"].Equals("completed"))
{
stmt = "UPDATE torrents SET downloaded = downloaded + 1 WHERE sha=@sha";
using (SqlCommand command = new SqlCommand(stmt, myConnection))
{
command.Parameters.AddWithValue("sha", sha);
command.ExecuteNonQuery();
}
}
int numwant;
int numwant_max;
if (Int32.TryParse(Request.QueryString["numwant"], out numwant) == false)
{
numwant = 50;
}
if (Int32.TryParse(ConfigurationManager.AppSettings["config_max_numwant"], out numwant_max) == false)
{
numwant_max = 200;
}
if (numwant > numwant_max)
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Invalid numwant.Client requested more peers than allowed by tracker.");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(152);
Response.Write(obj.ToString());
return;
}
long uploaded;
long downloaded;
long left;
Int64.TryParse(Request.QueryString["uploaded"], out uploaded);
Int64.TryParse(Request.QueryString["downloaded"], out downloaded);
Int64.TryParse(Request.QueryString["left"], out left);
stmt = "SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;\n" +
"BEGIN TRANSACTION;\n" +
"UPDATE peers SET peer_id=@peer_id, date=@date, uploaded=@uploaded, downloaded=@downloaded, dl_left=@dl_left WHERE sha=@sha AND ip=@ip AND port=@port\n" +
"IF @@ROWCOUNT = 0\n" +
"INSERT INTO peers(sha, ip, port, peer_id, uploaded, downloaded, dl_left) VALUES(@sha, @ip, @port, @peer_id, @uploaded, @downloaded, @dl_left)\n" +
"COMMIT TRANSACTION;";
try {
using (SqlCommand command = new SqlCommand(stmt, myConnection))
{
command.Parameters.AddWithValue("sha", sha);
command.Parameters.AddWithValue("peer_id", peer_id);
command.Parameters.AddWithValue("ip", ip);
command.Parameters.AddWithValue("port", port);
command.Parameters.AddWithValue("date", DateTime.Now);
command.Parameters.AddWithValue("uploaded", uploaded);
command.Parameters.AddWithValue("downloaded", downloaded);
command.Parameters.AddWithValue("dl_left", left);
command.ExecuteNonQuery();
}
}
catch
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("info_hash not found in the database");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(200);
Response.Write(obj.ToString());
return;
}
int no_peer_id;
Int32.TryParse(Request.QueryString["no_peer_id"], out no_peer_id);
no_peer_id = 0;
obj.getDictonary()[new BENObject("interval")] = new BENObject(interval);
List <BENObject> peers = new List <BENObject>();
obj.getDictonary()[new BENObject("peers")] = new BENObject(peers);
if (numwant > 0)
{
if (no_peer_id == 0)
{
stmt = String.Format("SELECT TOP {0} ip, port, peer_id FROM peers WHERE sha=@sha;", numwant);
}
else
{
stmt = String.Format("SELECT TOP {0} ip, port FROM peers WHERE sha=@sha;", numwant);
}
using (SqlCommand command = new SqlCommand(stmt, myConnection))
{
command.Parameters.AddWithValue("sha", sha);
using (SqlDataReader reader = command.ExecuteReader())
{
BENObject ben_peer_id = new BENObject("peer id");
BENObject ben_ip = new BENObject("ip");
BENObject ben_port = new BENObject("port");
while (reader.Read())
{
Dictionary <BENObject, BENObject> dic = new Dictionary <BENObject, BENObject>();
if (no_peer_id == 0)
{
dic.Add(ben_peer_id, new BENObject(hex2bin(reader.GetString(2))));
}
dic.Add(ben_ip, new BENObject(reader.GetString(0)));
dic.Add(ben_port, new BENObject(reader.GetInt32(1)));
peers.Add(new BENObject(dic));
}
}
}
}
Response.BinaryWrite(obj.ToBytes());
}
}
catch
{
obj.getDictonary()[new BENObject("failure reason")] = new BENObject("Generic error");
obj.getDictonary()[new BENObject("failure code")] = new BENObject(900);
Response.Write(obj.ToString());
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (fileToUpload.HasFile)
{
Stream fileStream;
int length = fileToUpload.PostedFile.ContentLength;
Byte[] Input = new Byte[length];
fileStream = fileToUpload.FileContent;
fileStream.Read(Input, 0, length);
BENObject obj;
try
{
obj = new BENObject(ref Input);
}
catch
{
BotLabel.Text = "Torrent parsing fail";
return;
}
if (is_valid_torrent(ref obj))
{
obj.getDictonary()[new BENObject("announce")] = new BENObject(ConfigurationManager.AppSettings["config_announce"]);
obj.getDictonary().Remove(new BENObject("announce-list"));
BENObject info = obj.getDictonary()[new BENObject("info")];
SHA1 sha_crypto = new SHA1CryptoServiceProvider();
byte[] result = sha_crypto.ComputeHash(info.ToBytes());
string sha = BitConverter.ToString(result).Replace("-", string.Empty);
BotLabel.Text = sha + "<br />";
try {
using (SqlConnection myConnection = new SqlConnection(DatabaseConnectionString))
{
myConnection.Open();
string stmt = "INSERT INTO torrents (sha, name, username) values(@sha, @name, @username);";
using (SqlCommand myCommand = new SqlCommand(stmt, myConnection))
{
myCommand.Parameters.AddWithValue("sha", sha);
myCommand.Parameters.AddWithValue("name", info.getDictonary()[new BENObject("name")].getString());
myCommand.Parameters.AddWithValue("username", (String)Session["username"]);
myCommand.ExecuteNonQuery();
}
}
}
catch (Exception ex)
{
BotLabel.Text += "Error: " + ex.Message;
return;
}
try {
string file_path = String.Format("{0}/{1}.torrent", ConfigurationManager.AppSettings["config_upload_dir"], sha);
FileInfo file = new FileInfo(Server.MapPath(file_path));
file.Directory.Create();
File.WriteAllBytes(file.FullName, obj.ToBytes());
BotLabel.Text += "New record created successfully";
}
catch (Exception ex)
{
try {
using (SqlConnection myConnection = new SqlConnection(DatabaseConnectionString))
{
myConnection.Open();
string stmt = "DELETE FROM torrents WHERE sha=@sha;";
using (SqlCommand cmdCount = new SqlCommand(stmt, myConnection))
{
cmdCount.Parameters.AddWithValue("sha", sha);
cmdCount.ExecuteNonQuery();
}
}
}
catch
{
}
BotLabel.Text += "Error: " + ex.Message;
}
}
else
{
BotLabel.Text = "Torrent validation fail";
}
}
}
private void handleRecord(string sha, SqlDataReader reader)
{
StringBuilder sb = new StringBuilder();
String user = reader.GetString(2);
sb.AppendFormat("{0}<a href=\"{1}/{2}.torrent\" download=\"{3}.torrent\">{3}</a> ", NameLabel.Text, ConfigurationManager.AppSettings["config_upload_dir"], sha, reader.GetString(0));
if (Session["login"] != null)
{
if (user == (String)Session["username"])
{
sb.AppendFormat("<a href=\"torrent.aspx?action=delete&sha={0}\">[X]</a>", sha);
}
}
NameLabel.Text = sb.ToString();
sb.Length = 0;
sb.Append(DateLabel.Text);
sb.Append(reader.GetDateTime(1));
DateLabel.Text = sb.ToString();
sb.Length = 0;
string file_path = String.Format("{0}/{1}.torrent", ConfigurationManager.AppSettings["config_upload_dir"], sha);
FileInfo file = new FileInfo(Server.MapPath(file_path));
if (file.Exists)
{
byte[] bytes = File.ReadAllBytes(file.FullName);
BENObject obj = new BENObject(ref bytes);
BENObject ben_lenght = new BENObject("length");
BENObject ben_name = new BENObject("name");
Dictionary <BENObject, BENObject> info_dict = obj.getDictonary()[new BENObject("info")].getDictonary();
if (info_dict.ContainsKey(ben_lenght) && info_dict[ben_lenght].getType() == BENObjectType.Integer &&
info_dict.ContainsKey(ben_name) && info_dict[ben_name].getType() == BENObjectType.String)
{
sb.Append(SizeLabel.Text);
sb.Append(get_format_size(info_dict[ben_lenght].getInt()));
SizeLabel.Text = sb.ToString();
sb.Length = 0;
sb.Append(FilesLabel.Text);
sb.Append(info_dict[ben_name].getString());
FilesLabel.Text = sb.ToString();
sb.Length = 0;
}
else
{
long size = 0;
List <BENObject> files_list = info_dict[new BENObject("files")].getList();
BENObject ben_length = new BENObject("length");
BENObject ben_path = new BENObject("path");
sb.Append(FilesLabel.Text);
foreach (BENObject files in files_list)
{
Dictionary <BENObject, BENObject> file_dict = files.getDictonary();
size += file_dict[ben_length].getInt();
List <BENObject> list = file_dict[ben_path].getList();
Boolean first = true;
foreach (BENObject path in list)
{
sb.Append(first ? "" : "/");
sb.Append(path.getString());
first = false;
}
sb.Append("<br>");
}
FilesLabel.Text = sb.ToString();;
sb.Length = 0;
sb.Append(SizeLabel.Text);
sb.Append(get_format_size(size));
SizeLabel.Text = sb.ToString();
sb.Length = 0;
}
}
}