/** AKA scraping */
public TorrentStatus getStatus() throws IOException {
if (!isGetStatusSupported()) {
throw new IllegalStateException("Get status (scraping) not supported on this tracker");
}
String path = announceUrl.getFile();
int i = path.lastIndexOf('/');
path = path.substring(0, i + 1) + "scrape" + path.substring(i + ANNOUNCE.length() + 1);
GetMethod method = new GetMethod(path);
method.setRequestHeader("User-Agent", "BlackBits/0.1");
StringBuffer queryString =
new StringBuffer(announceUrl.getQuery() == null ? "" : announceUrl.getQuery());
queryString.append("info_hash=" + URLUtils.encode(infoHash.getBytes()));
method.setQueryString(queryString.toString());
httpClient.executeMethod(method);
BDecoder decoder = new BDecoder(method.getResponseBodyAsStream());
BDictionary dictionary = (BDictionary) decoder.decodeNext();
BDictionary files = (BDictionary) dictionary.get("files");
String key = (String) files.keySet().iterator().next();
BDictionary info = (BDictionary) files.get(key);
BLong seeders = (BLong) info.get("complete");
BLong leechers = (BLong) info.get("incomplete");
BLong numberOfDownloads = (BLong) info.get("downloaded");
return new TorrentStatus(seeders.intValue(), leechers.intValue(), numberOfDownloads.intValue());
}
private TrackerResponse decodeResponse(GetMethod method)
throws IOException, TrackerCommunicationException {
BDecoder decoder = new BDecoder(method.getResponseBodyAsStream());
BDictionary dictionary = (BDictionary) decoder.decodeNext();
if (dictionary.get("failure reason") != null) {
BString failureReason = (BString) dictionary.get("failure reason");
throw new TrackerCommunicationException(failureReason.getStringValue());
}
int seeders = getInt(dictionary, "complete");
int leechers = getInt(dictionary, "incomplete");
int updateInterval = getInt(dictionary, "interval");
BList peersList = (BList) dictionary.get("peers");
List peers = new ArrayList();
for (Iterator i = peersList.iterator(); i.hasNext(); ) {
BDictionary peerDictionary = (BDictionary) i.next();
peers.add(
new Peer(
((BString) peerDictionary.get("peer id")).getStringValue(),
((BLong) peerDictionary.get("port")).intValue(),
((BString) peerDictionary.get("ip")).getStringValue()));
}
return new TrackerResponse(seeders, leechers, updateInterval, peers);
}
private int getInt(BDictionary dictionary, String key) {
BObject bObject = dictionary.get(key);
if (!(bObject instanceof BLong)) {
return 0;
}
return (int) ((BLong) bObject).longValue();
}