private void OnTransferAuthorization(TransferManagerAuthorizationEventArgs e)
{
var handler = TransferAuthorization;
if (handler != null)
{
handler(this, e);
}
}
private void TransferAuthorizationHandler(object sender, TransferAuthorizationEventArgs e)
{
var transfer = (TransferConnection)sender;
// NOTE: we should remember that active users don't have allow records
// They will have an address of a hub in the Source property
// defined in ConnectToMe command handle section
List <TransferConnection> list;
TransferRequest req;
Source source;
lock (_synRoot)
{
var index = _allowedUsers.FindIndex(p => p.Nickname == e.UserNickname);
if (index != -1)
{
// passive user
req = _allowedUsers[index];
_allowedUsers.RemoveAt(index);
}
else
{
// active user
if (!transfer.AllowedToConnect)
{
return;
}
req = TransferRequest.Empty;
}
source = new Source
{
UserNickname = e.UserNickname,
HubAddress = req.IsEmpty ? transfer.Source.HubAddress : req.Hub.RemoteAddressString
};
// find connections with the same user
list = _connections.Where(transferConnection => transferConnection.Source == source).ToList();
}
// do not allow duplicate connections
using (new PerfLimit("TransferManager disconnecting transfers"))
foreach (var connection in list)
{
connection.DisconnectAsync();
Logger.Info("Disconnecting old transfer {0}", source);
}
var ea = new TransferManagerAuthorizationEventArgs
{
Connection = (TransferConnection)sender,
Nickname = e.UserNickname
};
OnTransferAuthorization(ea);
if (ea.Cancel)
{
Logger.Info("Transfer connection cancelled at top level {0}", e.UserNickname);
return;
}
e.Allowed = true;
lock (_synRoot)
{
if (req.IsEmpty)
{
e.HubAddress = source.HubAddress;
HubConnection hub;
using (new PerfLimit("TransferManager Hub obtaining"))
hub = _engine.Hubs.FirstOrDefault(h => h.RemoteAddressString == e.HubAddress);
if (hub != null)
{
e.OwnNickname = hub.Settings.Nickname;
}
else
{
Logger.Error("Authorisation failed for {0}. There is no such hub: {1} ", e.UserNickname,
e.HubAddress);
e.Allowed = false;
}
}
else
{
e.OwnNickname = req.Hub.CurrentUser.Nickname;
e.HubAddress = req.Hub.RemoteAddressString;
}
using (new PerfLimit("TransferManager SourceUpdate"))
_engine.SourceManager.UpdateRequests(source, -1);
}
}
