/** TODO prefere call CRAWL packet to get a fresh list
* FIrst check in the cache if we have something
* If not , call the Gwebcache service to bootstrap into gnutella2 network
* */
public NodePeer ConnectToRandomHub()
{
NodePeer p = null;
do
{
while (GHubCache.Instance.HubCacheSize > 0 && (p = ConnectToHubInCache()) == null)
{
}
if (p != null)
{
break;
}
p = Bootstrap();
if (p == null)
{
GWebCache.Instance.ForceRefresh = true; // if we have bootstrap one time and no answer is good, we force the refresh
}
} while (p == null);
if (p != null)
{
G2Log.Write("G2Network : Connected to " + p.ToString());
}
return(p);
}
// True if connected to a hub
// false if attempted to connect to a leaf ( but has certainly retrieved many hubs )
public bool TryConnect()
{
try {
bool success = false;
G2Log.Write("GHandshake : Try to connect to " + remote_host.ToString());
var isConnected = tcp.Connect();
if (!isConnected)
{
return(false);
}
OnConnected();
success = OnResponse();
if (success)
{
//bool connected = tcp.CheckConnection();
//Log.Write("GHandshake : Connected ? " + connected);
OnReply();
}
else
{
tcp.Close();
}
return(success);
} catch (Exception e) {
tcp.Close();
return(false);
}
}
/**
* Add the hub to the list of connected hub
* and remove it from the list of available hubs
* */
public void AddConnectedHub(NodePeer hub)
{
lock (ConnectedHub_) {
RemoveHub(hub);
ConnectedHub_.Add(hub);
G2Log.Write("GHUBCACHE : ADDED CONNECTED HUB " + hub.ToString());
}
}
/** Remove the hub from the connected hub cache and close its connection */
public void RemoveConnectedHub(NodePeer hub)
{
lock (ConnectedHub_) {
ConnectedHub_.Remove(hub);
hub.Close();
G2Log.Write("Cache : Removing hub " + hub.ToString() + " ... ");
}
}
public bool Connect()
{
try {
sock.Connect(new IPEndPoint(peer.Address, (int)peer.Port));
} catch (Exception e) {
G2Log.Write("TCP " + peer.ToString() + " => " + e.ToString());
return(false);
}
return(true);
}
public void StartBrowsing()
{
TCPConnection con = TCPConnection.getPeerConnection(Peer);
if (!con.Connect())
{
G2Log.Write("G2BrowseSearch could not connect to Peer " + this.Peer.ToString());
if (EndSearch != null)
{
EndSearch(referenceToPeer, referenceToSearchResults, packetResults);
}
return;
}
if (!SendHttpRequest(con))
{
if (EndSearch != null)
{
EndSearch(referenceToPeer, referenceToSearchResults, packetResults);
}
Peer.Close();
return;
}
bool streaming = ReadResponseHeader(con);
if (!streaming)
{
if (EndSearch != null)
{
EndSearch(referenceToPeer, referenceToSearchResults, packetResults);
}
Peer.Close();
return;
}
// start to read the flow of packets
this.Peer.connection = new HubSocket(this.Peer, con.sock, reader);
this.Peer.connection.Start();
G2Log.Write("G2BrowseSearch : browsing peer " + Peer.ToString() + " ...");
SearchTimer = new Timer(Settings.WAIT_TIME_BROWSING_MS);
SearchTimer.Elapsed += new ElapsedEventHandler(SearchTimeOut);
SearchTimer.AutoReset = false;
SearchTimer.Start();
}
/**
* Add the hub to the list of connected hub
* and remove it from the list of available hubs
* */
public void AddConnectedHub(NodePeer hub)
{
lock (ConnectedHub_) {
RemoveHub (hub);
ConnectedHub_.Add (hub);
G2Log.Write ("GHUBCACHE : ADDED CONNECTED HUB " + hub.ToString ());
}
}
/** Remove the hub from the connected hub cache and close its connection */
public void RemoveConnectedHub(NodePeer hub)
{
lock (ConnectedHub_) {
ConnectedHub_.Remove (hub);
hub.Close ();
G2Log.Write ("Cache : Removing hub " + hub.ToString() + " ... ");
}
}
/**
* Send the request to connected hubs .
* */
private void DispatchRequest(G2PacketQ2 pack)
{
int count = 0;
NodePeer hub = null;
while (count < Settings.PEER_DISPATCH_QUERY)
{
hub = G2Network.Instance.getQueryableHub();
hub.DontQueryBefore(Settings.SEARCH_TIME_OUT_MS);
hub.SendPacket(pack);
G2Log.Write("G2SearchManager : Sent Query " + getTermsByGUID(pack.guid) + " on " + hub.ToString());
count++;
}
}
