Add support for Deluge V2 RPC.

Fixes #502.
Unfortunatley there is no good way to detect the version, so added another choice.

app/src/main/java/org/transdroid/daemon/Daemon.java

@@ -69,7 +69,12 @@ public enum Daemon {
 	},
 	DelugeRpc {
 		public IDaemonAdapter createAdapter(DaemonSettings settings) {
-			return new DelugeRpcAdapter(settings);
+			return new DelugeRpcAdapter(settings, false);
+		}
+	},
+	Deluge2Rpc {
+		public IDaemonAdapter createAdapter(DaemonSettings settings) {
+			return new DelugeRpcAdapter(settings, true);
 		}
 	},
 	Dummy {
@@ -155,8 +160,10 @@ public enum Daemon {
 			return "daemon_buffalonas";
 		case Deluge:
 			return "daemon_deluge";
-			case DelugeRpc:
+		case DelugeRpc:
 			return "daemon_deluge_rpc";
+		case Deluge2Rpc:
+			return "daemon_deluge2_rpc";
 		case DLinkRouterBT:
 			return "daemon_dlinkrouterbt";
 		case Dummy:
@@ -214,6 +221,9 @@ public enum Daemon {
 		if (daemonCode.equals("daemon_deluge_rpc")) {
 			return DelugeRpc;
 		}
+		if (daemonCode.equals("daemon_deluge2_rpc")) {
+			return Deluge2Rpc;
+		}
 		if (daemonCode.equals("daemon_dlinkrouterbt")) {
 			return DLinkRouterBT;
 		}
@@ -275,6 +285,7 @@ public enum Daemon {
         	return 8112;
 
         case DelugeRpc:
+		case Deluge2Rpc:
         	return DelugeRpcAdapter.DEFAULT_PORT;
 
         case Synology:
@@ -308,13 +319,13 @@ public enum Daemon {
 
 	public static boolean supportsFileListing(Daemon type) {
 		return type == Synology || type == Transmission || type == uTorrent || type == BitTorrent || type == KTorrent || type == Deluge
-				|| type == DelugeRpc || type == rTorrent || type == Vuze || type == DLinkRouterBT || type == Bitflu || type == qBittorrent
+				|| type == DelugeRpc || type == Deluge2Rpc || type == rTorrent || type == Vuze || type == DLinkRouterBT || type == Bitflu
-				|| type == BuffaloNas || type == BitComet || type == Aria2 || type == tTorrent || type == Dummy;
+				|| type == qBittorrent || type == BuffaloNas || type == BitComet || type == Aria2 || type == tTorrent || type == Dummy;
 	}
 
 	public static boolean supportsFineDetails(Daemon type) {
 		return type == uTorrent || type == BitTorrent || type == Daemon.Transmission || type == Deluge || type == DelugeRpc
-				|| type == rTorrent || type == qBittorrent || type == Aria2 || type == Dummy;
+				|| type == Deluge2Rpc || type == rTorrent || type == qBittorrent || type == Aria2 || type == Dummy;
 	}
 
 	public static boolean needsManualPathSpecified(Daemon type) {
@@ -322,7 +333,7 @@ public enum Daemon {
 	}
 
 	public static boolean supportsFilePaths(Daemon type) {
-		return type == uTorrent || type == BitTorrent || type == Vuze || type == Deluge || type == DelugeRpc
+		return type == uTorrent || type == BitTorrent || type == Vuze || type == Deluge || type == DelugeRpc || type == Deluge2Rpc
 				|| type == Transmission || type == rTorrent || type == KTorrent || type == BuffaloNas || type == Aria2 || type == Dummy;
 	}
 
@@ -335,12 +346,12 @@ public enum Daemon {
 	}
 
 	public static boolean supportsCustomFolder(Daemon type) {
-		return type == rTorrent || type == Tfb4rt || type == Bitflu || type == Deluge || type == DelugeRpc || type == Aria2
+		return type == rTorrent || type == Tfb4rt || type == Bitflu || type == Deluge || type == DelugeRpc || type == Deluge2Rpc || type == Aria2
 				|| type == Transmission || type == BitTorrent || type == uTorrent || type == qBittorrent || type == Dummy;
 	}
 
 	public static boolean supportsSetTransferRates(Daemon type) {
-		return type == Deluge || type == DelugeRpc
+		return type == Deluge || type == DelugeRpc || type == Deluge2Rpc
 				|| type == Transmission || type == uTorrent || type == BitTorrent || type == rTorrent || type == Vuze || type == BuffaloNas
 				|| type == BitComet || type == Aria2 || type == qBittorrent || type == Dummy;
 	}
@@ -364,28 +375,28 @@ public enum Daemon {
 
 	public static boolean supportsFilePrioritySetting(Daemon type) {
 		return type == BitTorrent || type == uTorrent || type == Transmission || type == KTorrent || type == rTorrent || type == Vuze
-				|| type == Deluge || type == DelugeRpc
+				|| type == Deluge || type == DelugeRpc || type == Deluge2Rpc
 				|| type == qBittorrent || type == tTorrent || type == Dummy;
 	}
 	
 	public static boolean supportsDateAdded(Daemon type) {
 		return type == Vuze || type == Transmission || type == rTorrent || type == Bitflu || type == BitComet || type == uTorrent
-				|| type == BitTorrent || type == Deluge || type == DelugeRpc
+				|| type == BitTorrent || type == Deluge || type == DelugeRpc || type == Deluge2Rpc
 				|| type == qBittorrent || type == Dummy;
 	}
 
 	public static boolean supportsLabels(Daemon type) {
-		return type == uTorrent || type == BitTorrent || type == Deluge || type == DelugeRpc || type == BitComet || type == rTorrent
+		return type == uTorrent || type == BitTorrent || type == Deluge || type == DelugeRpc || type == Deluge2Rpc || type == BitComet
-				|| type == qBittorrent || type == Dummy;
+				|| type == rTorrent || type == qBittorrent || type == Dummy;
 	}
 
 	public static boolean supportsSetLabel(Daemon type) {
-		return type == uTorrent || type == BitTorrent || type == rTorrent || type == Deluge || type == DelugeRpc
+		return type == uTorrent || type == BitTorrent || type == rTorrent || type == Deluge || type == DelugeRpc || type == Deluge2Rpc
 				|| type == qBittorrent || type == Dummy;
 	}
 
 	public static boolean supportsSetDownloadLocation(Daemon type) {
-		return type == Transmission || type == Deluge || type == DelugeRpc || type == qBittorrent || type == Dummy;
+		return type == Transmission || type == Deluge || type == DelugeRpc || type == Deluge2Rpc|| type == qBittorrent || type == Dummy;
 	}
 
 	public static boolean supportsSetAlternativeMode(Daemon type) {
@@ -393,12 +404,12 @@ public enum Daemon {
 	}
 
 	public static boolean supportsSetTrackers(Daemon type) {
-		return type == uTorrent || type == BitTorrent || type == Deluge || type == DelugeRpc || type == Dummy;
+		return type == uTorrent || type == BitTorrent || type == Deluge || type == DelugeRpc || type == Deluge2Rpc|| type == Dummy;
 	}
 
 	public static boolean supportsForceRecheck(Daemon type) {
-		return type == uTorrent || type == BitTorrent || type == Deluge || type == DelugeRpc || type == rTorrent || type == Transmission
+		return type == uTorrent || type == BitTorrent || type == Deluge || type == DelugeRpc || type == Deluge2Rpc || type == rTorrent
-				|| type == Dummy || type == qBittorrent;
+				|| type == Transmission || type == Dummy || type == qBittorrent;
 	}
 
 	public static boolean supportsExtraPassword(Daemon type) {
@@ -406,7 +417,7 @@ public enum Daemon {
 	}
 
 	public static boolean supportsRemoteRssManagement(Daemon type) {
-		return type == uTorrent || type == DelugeRpc;
+		return type == uTorrent || type == DelugeRpc || type == Deluge2Rpc;
 	}
 
 }

app/src/main/java/org/transdroid/daemon/Deluge/DelugeRpcAdapter.java

@@ -49,16 +49,18 @@ public class DelugeRpcAdapter implements IDaemonAdapter, RemoteRssSupplier {
 	public static final int DEFAULT_PORT = 58846;
 
 	private final DaemonSettings settings;
+	private final boolean isVersion2;
 
 	private int version = -1;
 
-	public DelugeRpcAdapter(DaemonSettings settings) {
+	public DelugeRpcAdapter(DaemonSettings settings, boolean isVersion2) {
 		this.settings = settings;
+		this.isVersion2 = isVersion2;
 	}
 
 	@Override
 	public DaemonTaskResult executeTask(Log log, DaemonTask task) {
-		final DelugeRpcClient client = new DelugeRpcClient();
+		final DelugeRpcClient client = new DelugeRpcClient(isVersion2);
 		try {
 			client.connect(settings);
 			switch (task.getMethod()) {
@@ -109,7 +111,7 @@ public class DelugeRpcAdapter implements IDaemonAdapter, RemoteRssSupplier {
 
 	@Override
 	public Daemon getType() {
-		return Daemon.DelugeRpc;
+		return isVersion2 ? Daemon.Deluge2Rpc : Daemon.DelugeRpc;
 	}
 
 	@Override
@@ -120,7 +122,7 @@ public class DelugeRpcAdapter implements IDaemonAdapter, RemoteRssSupplier {
 	@Override
 	public ArrayList<RemoteRssChannel> getRemoteRssChannels(Log log) throws DaemonException {
 		final long now = System.currentTimeMillis();
-		final DelugeRpcClient client = new DelugeRpcClient();
+		final DelugeRpcClient client = new DelugeRpcClient(isVersion2);
 		try {
 			client.connect(settings);
 
@@ -197,7 +199,7 @@ public class DelugeRpcAdapter implements IDaemonAdapter, RemoteRssSupplier {
 		} else {
 			label = null;
 		}
-		final DelugeRpcClient client = new DelugeRpcClient();
+		final DelugeRpcClient client = new DelugeRpcClient(isVersion2);
 
 		try {
 			client.connect(settings);
@@ -369,10 +371,10 @@ public class DelugeRpcAdapter implements IDaemonAdapter, RemoteRssSupplier {
 		final List<Torrent> torrents = new ArrayList<>();
 		int id = 0;
 		for (Map<String, Object> torrentMap : torrentMaps) {
-			final Object timeAdded = torrentMap.get(RPC_TIMEADDED);
+			final Number timeAdded = (Number) torrentMap.get(RPC_TIMEADDED);
 			final Date timeAddedDate;
 			if (timeAdded != null) {
-				final long seconds = (long) (float) timeAdded;
+				final long seconds = timeAdded.longValue();
 				timeAddedDate = new Date(seconds * 1000L);
 			} else {
 				timeAddedDate = null;

app/src/main/java/org/transdroid/daemon/Deluge/DelugeRpcClient.java

@@ -27,8 +27,10 @@ import se.dimovski.rencode.Rencode;
 import java.io.ByteArrayOutputStream;
 import java.io.Closeable;
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.Socket;
 import java.net.UnknownHostException;
+import java.nio.ByteBuffer;
 import java.util.HashMap;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -36,6 +38,7 @@ import java.util.zip.DeflaterOutputStream;
 import java.util.zip.InflaterInputStream;
 
 import static org.transdroid.daemon.Deluge.DelugeCommon.RPC_METHOD_DAEMON_LOGIN;
+import static org.transdroid.daemon.Deluge.DelugeCommon.RPC_METHOD_INFO;
 
 /**
  * A Deluge RPC API Client.
@@ -45,13 +48,23 @@ class DelugeRpcClient implements Closeable {
 	private static final int RESPONSE_TYPE_INDEX = 0;
 	private static final int RESPONSE_RETURN_VALUE_INDEX = 2;
 	private static final int RPC_ERROR = 2;
+	private static final byte V2_PROTOCOL_VERSION = 1;
+	private static final int V2_HEADER_SIZE = 5;
 
 	private Socket socket;
+	private final boolean isVersion2;
 	private static AtomicInteger requestId = new AtomicInteger();
 
+	DelugeRpcClient(boolean isVersion2) {
+		this.isVersion2 = isVersion2;
+	}
+
 	void connect(DaemonSettings settings) throws DaemonException {
 		try {
 			socket = openSocket(settings);
+			if (isVersion2) {
+				sendRequest(RPC_METHOD_INFO);
+			}
 			if (settings.shouldUseAuthentication()) {
 				sendRequest(RPC_METHOD_DAEMON_LOGIN, settings.getUsername(), settings.getPassword());
 			}
@@ -75,12 +88,26 @@ class DelugeRpcClient implements Closeable {
 	Object sendRequest(String method, Object... args) throws DaemonException {
 		final byte[] requestBytes;
 		try {
-			requestBytes = compress(Rencode.encode(new Object[]{new Object[]{requestId.getAndIncrement(), method, args, new HashMap<>()}}));
+			HashMap<Object, Object> kwargs = new HashMap<>();
+			if (isVersion2 && RPC_METHOD_DAEMON_LOGIN.equals(method)) {
+				kwargs.put("client_version", "" + V2_PROTOCOL_VERSION);
+			}
+			requestBytes = compress(Rencode.encode(new Object[]{new Object[]{requestId.getAndIncrement(), method, args, kwargs}}));
 		} catch (IOException e) {
 			throw new DaemonException(ExceptionType.ConnectionError, "Failed to encode request: " + e.getMessage());
 		}
 		try {
-			socket.getOutputStream().write(requestBytes);
+			if (isVersion2) {
+				socket.getOutputStream().write(
+						ByteBuffer.allocate(V2_HEADER_SIZE + requestBytes.length)
+								.put(V2_PROTOCOL_VERSION)
+								.putInt(requestBytes.length)
+								.put(requestBytes)
+								.array()
+				);
+			} else {
+				socket.getOutputStream().write(requestBytes);
+			}
 			return readResponse();
 		} catch (IOException e) {
 			throw new DaemonException(ExceptionType.ConnectionError, e.getMessage());
@@ -106,9 +133,22 @@ class DelugeRpcClient implements Closeable {
 
 	@NonNull
 	private Object readResponse() throws DaemonException, IOException {
-		final InflaterInputStream inflater = new InflaterInputStream(socket.getInputStream());
+		final InputStream in = socket.getInputStream();
+		final InflaterInputStream inflater = new InflaterInputStream(in);
 		final ByteArrayOutputStream out = new ByteArrayOutputStream();
-		final byte[] buffer = new byte[1024];
+
+		final byte[] buffer;
+		if (isVersion2) {
+			final byte[] header = new byte[V2_HEADER_SIZE];
+			in.read(header, 0, V2_HEADER_SIZE);
+			if (header[0] != V2_PROTOCOL_VERSION) {
+				throw new DaemonException(ExceptionType.ConnectionError, "Unexpected protocol version: " + header[0]);
+			}
+			buffer = new byte[ByteBuffer.wrap(header).getInt(1)];
+		} else {
+			buffer = new byte[1024];
+		}
+
 		while (inflater.available() > 0) {
 			final int n = inflater.read(buffer);
 			if (n > 0) {

app/src/main/res/values/strings.xml

@@ -389,6 +389,7 @@
         <item>Buffalo NAS -1.31</item>
         <item>Deluge 1.2+</item>
         <item>Deluge RPC</item>
+		<item>Deluge 2 RPC</item>
 		<item>DLink Router BT</item>
         <item>Ktorrent</item>
         <item>qBittorrent</item>
@@ -408,6 +409,7 @@
         <item>daemon_buffalonas</item>
         <item>daemon_deluge</item>
         <item>daemon_deluge_rpc</item>
+		<item>daemon_deluge2_rpc</item>
 		<item>daemon_dlinkrouterbt</item>
         <item>daemon_ktorrent</item>
         <item>daemon_qbittorrent</item>