Fix #58 (#99)

Fix #58

src/clientP2P/ClientDownload.java

@@ -35,6 +35,8 @@ import protocolP2P.FilePart;
 import protocolP2P.SizeRequest;
 import protocolP2P.SizeResponse;
 import protocolP2P.ProtocolP2PPacket;
+import protocolP2P.DiscoverRequest;
+import protocolP2P.DiscoverResponse;
 import protocolP2P.UpdateRatio;
 import clientP2P.ClientDownloadPart;
 import tools.HostItem;
@@ -391,6 +393,24 @@ public abstract class ClientDownload extends ServeErrors implements Runnable {
 		// get size
 		setSize();
 
+		// get hostlist from tracker
+		try {
+			ProtocolP2PPacket<?> req = createProtocolP2PPacket(new DiscoverRequest(filename));
+			req.sendRequest(getHostItemSocket(tracker));
+			Payload resp = req.receiveResponse().getPayload();
+			if (!(resp instanceof DiscoverResponse)) {
+				throw new InternalError();
+			}
+			DiscoverResponse p = (DiscoverResponse)resp;
+			hostList = p.getHostList();
+		} catch(IOException e) {
+			throw new InternalError();
+		} catch(RemoteException e) {
+			throw new InternalError();
+		} catch(LocalException e) {
+			throw new InternalError();
+		}
+
 		// get hashsum from 1st server in list
 		hash512 = getHashSum512(hostList.get(0));
 		if (hash512.length == 0) {