go-xmpp/stanza/component.go

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package stanza
import (
"encoding/xml"
)
// ============================================================================
// Handshake Stanza
// Handshake is a stanza used by XMPP components to authenticate on XMPP
// component port.
type Handshake struct {
XMLName xml.Name `xml:"jabber:component:accept handshake"`
// TODO Add handshake value with test for proper serialization
// Value string `xml:",innerxml"`
}
func (Handshake) Name() string {
return "component:handshake"
}
// Handshake decoding wrapper
type handshakeDecoder struct{}
var handshake handshakeDecoder
func (handshakeDecoder) decode(p *xml.Decoder, se xml.StartElement) (Handshake, error) {
var packet Handshake
err := p.DecodeElement(&packet, &se)
return packet, err
}
// ============================================================================
// Component delegation
// XEP-0355
// Delegation can be used both on message (for delegated) and IQ (for Forwarded),
// depending on the context.
type Delegation struct {
MsgExtension
XMLName xml.Name `xml:"urn:xmpp:delegation:1 delegation"`
Forwarded *Forwarded // This is used in iq to wrap delegated iqs
Delegated *Delegated // This is used in a message to confirm delegated namespace
}
func (d *Delegation) Namespace() string {
return d.XMLName.Space
}
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// Forwarded is used to wrapped forwarded stanzas.
// TODO: Move it in another file, as it is not limited to components.
type Forwarded struct {
XMLName xml.Name `xml:"urn:xmpp:forward:0 forwarded"`
Stanza Packet
}
// UnmarshalXML is a custom unmarshal function used by xml.Unmarshal to
// transform generic XML content into hierarchical Node structure.
func (f *Forwarded) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Check subelements to extract required field as boolean
for {
t, err := d.Token()
if err != nil {
return err
}
switch tt := t.(type) {
case xml.StartElement:
if packet, err := decodeClient(d, tt); err == nil {
f.Stanza = packet
}
case xml.EndElement:
if tt == start.End() {
return nil
}
}
}
}
type Delegated struct {
XMLName xml.Name `xml:"delegated"`
Namespace string `xml:"namespace,attr,omitempty"`
}
func init() {
TypeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:delegation:1", "delegation"}, Delegation{})
TypeRegistry.MapExtension(PKTIQ, xml.Name{"urn:xmpp:delegation:1", "delegation"}, Delegation{})
}