<iq/> stanza with generic payload and decode/encode.

src/xmpp/stanza.go

@@ -0,0 +1,28 @@
+package xmpp
+
+import "encoding/xml"
+
+// XMPP <iq/> stanza.
+type Iq struct {
+	XMLName xml.Name `xml:"iq"`
+	Id string `xml:"id,attr"`
+	Type string `xml:"type,attr"`
+	Payload string `xml:",innerxml"`
+}
+
+// Encode the value to an XML string and set as the payload. See xml.Marshal
+// for how the value is encoded.
+func (iq *Iq) PayloadEncode(v interface{}) error {
+	bytes, err := xml.Marshal(v)
+	if err != nil {
+		return err
+	}
+	iq.Payload = string(bytes)
+	return nil
+}
+
+// Decode the payload (an XML string) into the given value. See xml.Unmarshal
+// for how the value is decoded.
+func (iq *Iq) PayloadDecode(v interface{}) error {
+	return xml.Unmarshal([]byte(iq.Payload), v)
+}