Programming Jabber

Connecting to the Jabber server

Now we’re ready to connect to the Jabber server as a component. Despite what’s involved (described in Section 9.3.1.1) it’s very easy to make the connection to the Jabber server using a library such as Jabber::Connection:

my $c = new Jabber::Connection(
  server    => 'localhost:5999',
  localname => $ID,
  ns        => 'jabber:component:accept',
);

We construct a Jabber::Connection object, specifying the details of the connection we wish to make. The server argument is used to specify the hostname, and optionally the port, of the Jabber server to which we wish to connect. In the case of a component, we must always specify the port (which is 5999 in this example, as shown in Example 9-8). The same constructor can be used to create a client connection to the Jabber server, in which case a default port of 5222 (the standard port for client connections) is assumed if none is explicitly specified. The localname argument is used to specify the component’s name, which in this case is rss.qmacro.dyndns.org. In the same way that a default port of 5222 is assumed if none is specified, a default stream namespace of jabber:client is assumed if no ns argument is specified. Since we want to connect as a component using the TCP sockets connection method, we must specify the appropriate namespace: jabber:component:accept.

This constructor call results in a stream header being prepared; it looks like the one shown in Example 9-12.

The actual connection attempt, including the ...