/** Read a torrent from raw data */
public static function read($data)
{
$pos = 1;
$len = strlen($data);
if ($data[0] !== 'd') {
throw new Exception("Torrent data doesn't contain bencoding");
}
$meta = array();
$hash = null;
while ($pos < $len) {
if ($data[$pos] === 'e') {
$pos++;
break;
}
$key = Bencode::decodeString($data, $pos);
if ($key === 'info') {
$start = $pos;
$value = Bencode::decodeValue($data, $pos);
$end = $pos;
$hash = sha1(substr($data, $start, $end - $start), true);
} else {
$value = Bencode::decodeValue($data, $pos);
}
$meta[$key] = $value;
}
if (!isset($hash)) {
throw new Exception("Torrent doesn't contain 'info' data");
}
return new self($hash, $meta);
}
