Merge pull request #76 from TallaInc/improvement/information-query

expose information queries for custom extensions

xmpp.go

@@ -562,10 +562,11 @@ type Presence struct {
 }
 
 type IQ struct {
-	ID   string
-	From string
-	To   string
-	Type string
+	ID    string
+	From  string
+	To    string
+	Type  string
+	Query []byte
 }
 
 // Recv waits to receive the next XMPP stanza.
@@ -599,7 +600,7 @@ func (c *Client) Recv() (stanza interface{}, err error) {
 		case *clientPresence:
 			return Presence{v.From, v.To, v.Type, v.Show, v.Status}, nil
 		case *clientIQ:
-			return IQ{v.ID, v.From, v.To, v.Type}, nil
+			return IQ{ID: v.ID, From: v.From, To: v.To, Type: v.Type, Query: v.Query}, nil
 		}
 	}
 }
@@ -747,6 +748,7 @@ type clientIQ struct { // info/query
 	ID      string   `xml:"id,attr"`
 	To      string   `xml:"to,attr"`
 	Type    string   `xml:"type,attr"` // error, get, result, set
+	Query   []byte   `xml:",innerxml"`
 	Error   clientError
 	Bind    bindBind
 }
@@ -839,6 +841,7 @@ func next(p *xml.Decoder) (xml.Name, interface{}, error) {
 	if err = p.DecodeElement(nv, &se); err != nil {
 		return xml.Name{}, nil, err
 	}
+
 	return se.Name, nv, err
 }
 

xmpp_information_query.go

@@ -0,0 +1,24 @@
+package xmpp
+
+import (
+	"fmt"
+	"strconv"
+)
+
+const IQTypeGet = "get"
+const IQTypeSet = "set"
+const IQTypeResult = "result"
+
+func (c *Client) Discovery() (string, error) {
+	const namespace = "http://jabber.org/protocol/disco#items"
+	// use getCookie for a pseudo random id.
+	reqID := strconv.FormatUint(uint64(getCookie()), 10)
+	return c.RawInformationQuery(c.jid, c.domain, reqID, IQTypeGet, namespace, "")
+}
+
+// RawInformationQuery sends an information query request to the server.
+func (c *Client) RawInformationQuery(from, to, id, iqType, requestNamespace, body string) (string, error) {
+	const xmlIQ = "<iq from='%s' to='%s' id='%s' type='%s'><query xmlns='%s'>%s</query></iq>"
+	_, err := fmt.Fprintf(c.conn, xmlIQ, xmlEscape(from), xmlEscape(to), id, iqType, requestNamespace, body)
+	return id, err
+}