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@ -8,11 +8,12 @@ import (
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)
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// Reads and checks the opening XMPP stream element.
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// It returns a stream structure containing:
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// TODO It returns a stream structure containing:
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// - Host: You can check the host against the host you were expecting to connect to
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// - Id: the Stream ID is a temporary shared secret used for some hash calculation. It is also used by ProcessOne
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// reattach features (allowing to resume an existing stream at the point the connection was interrupted, without
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// getting through the authentication process.
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// TODO We should handle stream error from XEP-0114 ( <conflict/> or <host-unknown/> )
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func initDecoder(p *xml.Decoder) (sessionID string, err error) {
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for {
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var t xml.Token
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@ -59,38 +60,76 @@ func nextStart(p *xml.Decoder) (xml.StartElement, error) {
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panic("unreachable")
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}
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// Scan XML token stream for next element and save into val.
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// If val == nil, allocate new element based on proto map.
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// Either way, return val.
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func next(p *xml.Decoder) (xml.Name, interface{}, error) {
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// Read start element to find out what type we want.
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// next scans XML token stream for next element and then assign a structure to decode
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// that elements.
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// TODO Use an interface to return packets interface xmppDecoder
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func next(p *xml.Decoder) (Packet, error) {
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// Read start element to find out how we want to parse the XMPP packet
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se, err := nextStart(p)
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if err != nil {
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return xml.Name{}, nil, err
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return nil, err
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}
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// Put it in an interface and allocate one.
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var nv interface{}
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switch se.Name.Space + " " + se.Name.Local {
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// TODO: general case = Parse IQ / presence / message => split SASL case
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case nsSASL + " success":
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nv = &saslSuccess{}
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case nsSASL + " failure":
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nv = &saslFailure{}
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case NSClient + " message":
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nv = &ClientMessage{}
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case NSClient + " presence":
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nv = &ClientPresence{}
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case NSClient + " iq":
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nv = &ClientIQ{}
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// TODO: general case = Parse IQ / presence / message => split SASL Stream and component cases
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switch se.Name.Space {
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case NSStream:
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return decodeStream(p, se)
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case nsSASL:
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return decodeSASL(p, se)
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case NSClient:
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return decodeClient(p, se)
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case NSComponent:
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return decodeComponent(p, se)
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default:
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return xml.Name{}, nil, errors.New("unexpected XMPP message " +
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return nil, errors.New("unknown namespace " +
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se.Name.Space + " <" + se.Name.Local + "/>")
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}
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}
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func decodeStream(p *xml.Decoder, se xml.StartElement) (Packet, error) {
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switch se.Name.Local {
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case "error":
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return streamError.decode(p, se)
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default:
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return nil, errors.New("unexpected XMPP packet " +
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se.Name.Space + " <" + se.Name.Local + "/>")
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}
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}
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func decodeSASL(p *xml.Decoder, se xml.StartElement) (Packet, error) {
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switch se.Name.Local {
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case "success":
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return saslSuccess.decode(p, se)
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case "failure":
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return saslFailure.decode(p, se)
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default:
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return nil, errors.New("unexpected XMPP packet " +
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se.Name.Space + " <" + se.Name.Local + "/>")
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}
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}
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// Decode element into pointer storage
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if err = p.DecodeElement(nv, &se); err != nil {
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return xml.Name{}, nil, err
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func decodeClient(p *xml.Decoder, se xml.StartElement) (Packet, error) {
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switch se.Name.Local {
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case "message":
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return message.decode(p, se)
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case "presence":
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return presence.decode(p, se)
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case "iq":
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return iq.decode(p, se)
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default:
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return nil, errors.New("unexpected XMPP packet " +
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se.Name.Space + " <" + se.Name.Local + "/>")
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}
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}
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func decodeComponent(p *xml.Decoder, se xml.StartElement) (Packet, error) {
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switch se.Name.Local {
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case "handshake":
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return handshake.decode(p, se)
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case "iq":
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return iq.decode(p, se)
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default:
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return nil, errors.New("unexpected XMPP packet " +
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se.Name.Space + " <" + se.Name.Local + "/>")
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}
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return se.Name, nv, err
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}
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