implement discovery extension

xmpp_discovery.go

@@ -0,0 +1,12 @@
+package xmpp
+
+import (
+	"fmt"
+)
+
+const xmlIqGet = "<iq from='%s' to='%s' id='%d' type='get'><query xmlns='http://jabber.org/protocol/disco#items'/></iq>"
+
+func (c *Client) Discovery() {
+	cookie := getCookie()
+	fmt.Fprintf(c.conn, xmlIqGet, xmlEscape(c.jid), xmlEscape(c.domain), cookie)
+}