How can I get the user jabber Id in a chat room using AnyEvent::XMPP?

Question

There is a way to get the user's nick([email protected]/nick) in the chatroom according to the document, but how can I get the user's real jid([email protected]/resource_name)? is it possible according to XMPP protocol?

Answer 1

You can unless the room is anonymous. The Jabber protocol makes it possible that people in a chat room may be anonymous so that you cannot get back to their real JID. This is also why it provides a private message chat within the rooms, so you can still private message someone who has done this.

I have some code that does this in Bot::Backbone::Service::JabberChat:

# Figure out who sent this message
my $from_user = $room->get_user($xmpp_message->from_nick);

# Prefer the real JID as the username
my $from_username = $from_user->real_jid // $from_user->in_room_jid;
my $from_nickname = $from_user->nick;

See AnyEvent::XMPP::Ext::MUC::User and AnyEvent::XMPP::Ext::MUC::Room for more details.