Set timeout when sending a message and questions about delegate methods

[Peter Warbo]

Is there a way to set a timeout when sending an XMPP message (if user is on a slow connection)?

Also I'm curious about the delegate methods:

For instance:

 - (void)xmppStream:(XMPPStream *)sender didSendMessage:(XMPPMessage *)message

This delegate method is called when the message is sent? But does that mean that the message has reached the destination? A little extra explanation here would be great :)

- (void)xmppStream:(XMPPStream *)sender didReceiveError:(NSXMLElement *)error

When is this delegate method likely to happen? Does it happen when sending messages? Or receiving messages? Or both? What could the errors be?

[ObjColumnist]

In short, there is no way of knowing if a message has reached the server, it isn't part of the protocol.

 - (void)xmppStream:(XMPPStream *)sender didSendMessage:(XMPPMessage *)message

This tells you that the Message has been written to the socket

- (void)xmppStream:(XMPPStream *)sender didReceiveError:(NSXMLElement *)error

Normally this method will only get called if you send invalid data to the XMPP Server e.g. malformed XML

Regards

Spencer

[Peter Warbo]

Thanks for your reply.

I'm not too familiar with sockets (I just remember installing Trumpet Winsock on Windows 95). So that when the message is placed on the socket it has not even begun to transfer the message over the network?

[ObjColumnist]

Yeah, the socket has a buffer that you write to on one end, the OS deals with the other end and sends the data over the network.

The greater issue is that XMPP Servers don't send delivery receipts, although clients can request delivery receipts from other clients.

Even with this approach, it is hard to know where things went wrong as the flow isn't very short:

Client A => Server => Client B => Server => Client A