protected virtual void OnSendingServiceUnavailable(SendingServiceUnavailableEventArgs e)
{
if (SendingServiceUnavailable != null)
SendingServiceUnavailable(this, e);
}
void OnSendingServiceUnavailable(object sender, SendingServiceUnavailableEventArgs e)
{
if (e.Stanza.To == null) {
// can only be received by the server
return;
}
if (e.Stanza.To == JabberClient.MyJID.Server) {
// explicitly targeting the server
return;
}
XmppPersonModel person;
if (!Contacts.TryGetValue(e.Stanza.To.Bare, out person)) {
e.Cancel = true;
return;
}
if (person.Subscription != SubscriptionType.both &&
person.Subscription != SubscriptionType.from) {
e.Cancel = true;
return;
}
// the person already knows we are online, this does not give away our privacy
}
public override void StreamParserStreamElementNotHandled(object sender, UnhandledElementEventArgs eventArgs)
{
var stanza = eventArgs.Element as protocol.Base.StanzaWithError;
if (stanza == null) {
// what should we do here?
return;
}
if (stanza.Error != null) {
// don't respond to error messages with service unavailable
return;
}
stanza.Error = new protocol.client.Error(ErrorCondition.ServiceUnavailable);
stanza.SwitchDirection();
// allow the client to prevent this message (privacy/security reasons)
var ev = new SendingServiceUnavailableEventArgs(stanza);
OnSendingServiceUnavailable(ev);
if (ev.Cancel) {
// the client has cancelled this
return;
}
Send(eventArgs.Element);
}