Class Protocols.Bittorrent.Torrent

Description

Bittorrent peer - download and share. Read more about bittorrent at http://bitconjurer.org/BitTorrent/introduction.html

Example

The smallest usable torrent downloader. As first argument,
 it expects a filename to a .torrent file.
int main(int ac,array am)
  {
     // initialize Torrent from file:
     Protocols.Bittorrent.Torrent t=Protocols.Bittorrent.Torrent();
     t->load_metainfo(am[1]);

     // Callback when download status changes:
     // t->downloads_update_status=...;

     // Callback when pieces status change (when we get new stuff):
     // t->pieces_update_status=...;

     // Callback when peer status changes (connect, disconnect, choked...):
     // t->peer_update_status=...;

     // Callback when download is completed:
     t->download_completed_callback=
        lambda()
        {
            call_out(exit,3600,0);    // share for an hour, then exit
        };

     // Callback to print warnings (same args as sprintf):
     //   t->warning=werror;

     // type of progress function used below:
     void progress(int n,int of) { /* ... */ };

     // Initiate targets from Torrent,
     // if target was created, no need to verify:
     if (t->fix_targets(1,0,progress)==1)
        t->verify_targets(progress);

     // Open port to listen on,
     // we want to do this to be able to talk to firewalled peers:
     t->open_port(6881);

     // Ok, start calling tracker to get peers,
     // and tell about us:
     t->start_update_tracker();

     // Finally, start the download:
     t->start_download();

     return -1;
  }

Variable do_we_strangle

function(.Peer, int, int:bool) Protocols.Bittorrent.Torrent.do_we_strangle

Description

Function to determine if we should strangle this peer. Default is to allow 100000 bytes of data over the ratio, which is 2:1 per default; upload twice as much as we get.

Arguments are the peer, bytes in (downloaded) and bytes out (uploaded). Return 1 to strangle and 0 to allow the peer to proceed downloading again.

Variable download_completed_callback

function(:void) Protocols.Bittorrent.Torrent.download_completed_callback

Description

If set, called when download is completed.

Variable downloads_update_status

function(:void) Protocols.Bittorrent.Torrent.downloads_update_status

Description

If set, called when we start to download another piece (no args).

Variable peer_update_status

function(:void) Protocols.Bittorrent.Torrent.peer_update_status

Description

If set, called when peer status changes.

Variable pieces_update_status

function(:void) Protocols.Bittorrent.Torrent.pieces_update_status

Description

If set, called when we got another piece downloaded (no args).

Variable warning

function(string, __unknown__ ... :void|mixed) Protocols.Bittorrent.Torrent.warning

Description

Called if there is a protocol error.