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Creating Torrents

Version 8 (Alan McGovern, 07/30/2009 12:34 AM) → Version 9/13 (Alan McGovern, 07/30/2009 12:38 AM)

h1. Creating Torrents

[[Creating Torrents#Example-1|Example 1]] shows how to create a simple torrent.
[[Creating Torrents#Example-2|Example 2]] shows how to create a torrent asynchronously asynchronouslym so that it does not block the main thread in your application.
[[Creating Torrents#Example-3|Example 3]] shows how to abort the creation of a torrent after it has started

h2. Example 1

<pre><code class="java">
// 'path' is the location of the file/folder which is going to be converted
// to a torrent. 'savePath' is where the .torrent file will be saved.
void CreateTorrent(string path, string savePath)
{
// The class used for creating the torrent
TorrentCreator c = new TorrentCreator();

// Add one tier which contains two trackers
List<string> tier = new List<string>();
tier.Add("http://www.example.com/announce");
tier.Add("http://backup.example.com/announce");

c.Announces.Add(tier);
c.Comment = "This is the comment";
c.CreatedBy = "Alan using " + VersionInfo.ClientVersion;
c.Publisher = "www.homepage.com";

// Set the torrent as private so it will not use DHT or peer exchange
// Generally you will not want to set this.
c.Private = true;

// Path can be either a directory *or* a file.
c.Path = path;

// Every time a piece has been hashed, this event will fire. It is an
// asynchronous event, so you have to handle threading yourself.
c.Hashed += delegate (object o, TorrentCreatorEventArgs e) {
Console.WriteLine("Current File is {0}% hashed", e.FileCompletion);
Console.WriteLine("Overall {0}% hashed", e.OverallCompletion);
Console.WriteLine("Total data to hash: {0}", e.OverallSize);
};

// Create the torrent file and save it to the specified path
c.Create(save_path);
}
</code></pre>



h2. Example 2

<pre><code class="java">
// 'path' is the location of the file/folder which is going to be converted
// to a torrent. 'savePath' is where the .torrent file will be saved.
void CreateTorrent(string path, string savePath)
{
// The class used for creating the torrent
TorrentCreator c = new TorrentCreator();

// Fill in the path, trackers as in Example 1
FillInStandardInformation(c);

// Create the torrent asynchronously
c.BeginCreate(c, TorrentCreated);
}

void TorrentCreated(IAsyncResult result)
{
TorrentCreator c = (TorrentCreator)result.AsyncState;

// If any errors occured while creating the torrent, they
// will be rethrown here.
try
{
// Open the destination file and use the EndCreate overload which
// writes the data directly to the Stream.
using (FileStream stream = File.OpenWrite(savePath))
c.EndCreate(result, stream);
}
catch (Exception ex)
{
Console.WriteLine("Error creating torrent: {0}", ex);
}
}
</code></pre>

h2. Example 3

<pre><code class="java">
// 'path' is the location of the file/folder which is going to be converted
// to a torrent. 'savePath' is where the .torrent file will be saved.
void CreateTorrent(string path, string savePath)
{
// The class used for creating the torrent
TorrentCreator c = new TorrentCreator();

// Fill in the path, trackers as in Example 1
FillInStandardInformation(c);

// Create the torrent asynchronously and keep a reference to the
// IAsyncResult it returns
TorrentCreatorAsyncResult result = c.BeginCreate(c, TorrentCreated);

// Abort creation of the torrent (can be called at any stage). Note, you
// can only abort the creation if the torrent is created asynchronously
result.Abort();
}
</code></pre>