void CoreProtocol::handleStreamOpen(const Parser::Event &pe)
{
if(isIncoming()) {
QString ns = pe.nsprefix();
QString db;
if(server) {
db = pe.nsprefix("db");
if(!db.isEmpty())
dialback = true;
}
// verify namespace
if((!server && ns != NS_CLIENT) || (server && ns != NS_SERVER) || (dialback && db != NS_DIALBACK)) {
delayErrorAndClose(InvalidNamespace);
return;
}
// verify version
if(version.major < 1 && !dialback) {
delayErrorAndClose(UnsupportedVersion);
return;
}
}
else {
if(!dialback) {
if(version.major >= 1 && !oldOnly)
old = false;
else
old = true;
}
}
}
void checkNeedMore()
{
// Here we will work around QXmlSimpleReader strangeness and self-closing tags.
// The problem is that endElement() is called when the '/' is read, not when
// the final '>' is read. This is a potential problem when obtaining unprocessed
// bytes from StreamInput after this event, as the '>' character will end up
// in the unprocessed chunk. To work around this, we need to advance StreamInput's
// internal byte processing, but not the xml character data. This way, the '>'
// will get processed and will no longer be in the unprocessed return, but
// QXmlSimpleReader can still read it. To do this, we call StreamInput::readNext
// with 'peek' mode.
QChar c = in->readNext(true); // peek
if(c == QXmlInputSource::EndOfData) {
needMore = true;
}
else {
// We'll assume the next char is a '>'. If it isn't, then
// QXmlSimpleReader will deal with that problem on the next
// parse. We don't need to take any action here.
needMore = false;
// there should have been a pending event
Parser::Event *e = eventList.first();
if(!eventList.isEmpty()) {
e->setActualString(e->actualString() + '>');
in->resetLastData();
}
}
}
/**
* Process incoming stanza (first-level element).
*/
void Stream::processStanza(const Parser::Event& event)
{
QString id = event.element().attribute("id");
if (!id.isEmpty() && d->scb.contains(id)) {
Private::StanzaCallback cb = d->scb.value(id);
QObject *obj = cb.first;
qDebug("[XMPP::Stream] Invoke %s::%s for stanza with id %s",
obj->metaObject()->className(), qPrintable(cb.second), qPrintable(id));
QMetaObject::invokeMethod(obj, cb.second.toLocal8Bit().constData(), Q_ARG(XMPP::Stanza, event.element()));
d->scb.remove(id);
}
if ( event.qualifiedName() == "stream:error" ) {
handleStreamError(event);
} else if ( event.qualifiedName() == "message" ) {
emit stanzaMessage(event.element());
} else if ( event.qualifiedName() == "iq" ) {
emit stanzaIQ(event.element());
} else if ( event.qualifiedName() == "presence" ) {
emit stanzaPresence(event.element());
} else {
if (!handleUnknownElement(event))
qDebug("[XMPP::Stream] Unhandled first-level element: %s",
qPrintable(event.qualifiedName()));
}
}
void Stream::bsReadyRead()
{
QByteArray data = d->bytestream->readAll();
// qDebug("[XMPP:Stream] -recv-: %s", qPrintable(QString::fromUtf8(data)));
d->parser.appendData(data);
Parser::Event event = d->parser.readNext();
while ( !event.isNull() ) {
processEvent(event);
event = d->parser.readNext();
}
}
void BasicProtocol::handleDocOpen(const Parser::Event &pe)
{
if(isIncoming()) {
if(xmlEncoding() != "UTF-8") {
delayErrorAndClose(UnsupportedEncoding);
return;
}
}
if(pe.namespaceURI() == NS_ETHERX && pe.localName() == "stream") {
QXmlAttributes atts = pe.atts();
// grab the version
int major = 0;
int minor = 0;
QString verstr = atts.value("version");
if(!verstr.isEmpty()) {
int n = verstr.find('.');
if(n != -1) {
major = verstr.mid(0, n).toInt();
minor = verstr.mid(n+1).toInt();
}
else {
major = verstr.toInt();
minor = 0;
}
}
version = Version(major, minor);
if(isIncoming()) {
to = atts.value("to");
QString peerLang = atts.value(NS_XML, "lang");
if(!peerLang.isEmpty())
lang = peerLang;
}
// outgoing
else {
from = atts.value("from");
lang = atts.value(NS_XML, "lang");
id = atts.value("id");
}
handleStreamOpen(pe);
}
else {
if(isIncoming())
delayErrorAndClose(BadFormat);
else
delayError(ErrProtocol);
}
}
bool startElement(const QString &namespaceURI, const QString &localName, const QString &qName, const QXmlAttributes &atts)
{
if(depth == 0) {
Parser::Event *e = new Parser::Event;
QXmlAttributes a;
for(int n = 0; n < atts.length(); ++n) {
QString uri = atts.uri(n);
QString ln = atts.localName(n);
if(a.index(uri, ln) == -1)
a.append(atts.qName(n), uri, ln, atts.value(n));
}
e->setDocumentOpen(namespaceURI, localName, qName, a, nsnames, nsvalues);
nsnames.clear();
nsvalues.clear();
e->setActualString(in->lastString());
in->resetLastData();
eventList.append(e);
in->pause(true);
}
else {
QDomElement e = doc->createElementNS(namespaceURI, qName);
for(int n = 0; n < atts.length(); ++n) {
QString uri = atts.uri(n);
QString ln = atts.localName(n);
bool have;
if(!uri.isEmpty()) {
have = e.hasAttributeNS(uri, ln);
if(qt_bug_have)
have = !have;
}
else
have = e.hasAttribute(ln);
if(!have)
e.setAttributeNS(uri, atts.qName(n), atts.value(n));
}
if(depth == 1) {
elem = e;
current = e;
}
else {
current.appendChild(e);
current = e;
}
}
++depth;
return true;
}
bool XmlProtocol::baseStep(const Parser::Event &pe)
{
// Basic
if(state == SendOpen) {
sendTagOpen();
event = ESend;
if(incoming)
state = Open;
else
state = RecvOpen;
return true;
}
else if(state == RecvOpen) {
if(incoming)
state = SendOpen;
else
state = Open;
// note: event will always be DocumentOpen here
handleDocOpen(pe);
event = ERecvOpen;
return true;
}
else if(state == Open) {
QDomElement e;
if(pe.type() == Parser::Event::Element)
e = pe.element();
return doStep(e);
}
// Closing
else {
if(closeWritten) {
if(peerClosed) {
event = EPeerClosed;
return true;
}
else
return handleCloseFinished();
}
need = NNotify;
notify = NSend;
return false;
}
}
bool endElement(const QString &namespaceURI, const QString &localName, const QString &qName)
{
--depth;
if(depth == 0) {
Parser::Event *e = new Parser::Event;
e->setDocumentClose(namespaceURI, localName, qName);
e->setActualString(in->lastString());
in->resetLastData();
eventList.append(e);
in->pause(true);
}
else {
// done with a depth 1 element?
if(depth == 1) {
Parser::Event *e = new Parser::Event;
e->setElement(elem);
e->setActualString(in->lastString());
in->resetLastData();
eventList.append(e);
in->pause(true);
elem = QDomElement();
current = QDomElement();
}
else
current = current.parentNode().toElement();
}
if(in->lastRead() == '/')
checkNeedMore();
return true;
}
/**
* Process events from incoming stream.
*/
void Stream::processEvent(const Parser::Event& event)
{
switch ( event.type() ) {
case Parser::Event::DocumentOpen:
{
qDebug("[XMPP::Stream] Remote entity has opened the stream");
handleStreamOpen(event);
emit streamOpened();
}
break;
case Parser::Event::DocumentClose:
{
qWarning("[XMPP::Stream] Remote entity has closed the stream");
emit streamClosed();
}
break;
case Parser::Event::Element:
processStanza(event);
break;
case Parser::Event::Error:
qCritical("[XMPP::Stream] Parser error");
break;
}
}
bool XmlProtocol::processStep()
{
Parser::Event pe;
notify = 0;
transferItemList.clear();
if(state != Closing && (state == RecvOpen || stepAdvancesParser())) {
// if we get here, then it's because we're in some step that advances the parser
pe = xml.readNext();
if(!pe.isNull()) {
// note: error/close events should be handled for ALL steps, so do them here
switch(pe.type()) {
case Parser::Event::DocumentOpen: {
transferItemList += TransferItem(pe.actualString(), false);
//stringRecv(pe.actualString());
break;
}
case Parser::Event::DocumentClose: {
transferItemList += TransferItem(pe.actualString(), false);
//stringRecv(pe.actualString());
if(incoming) {
sendTagClose();
event = ESend;
peerClosed = true;
state = Closing;
}
else {
event = EPeerClosed;
}
return true;
}
case Parser::Event::Element: {
QDomElement e = elemDoc.importNode(pe.element(),true).toElement();
transferItemList += TransferItem(e, false);
//elementRecv(pe.element());
break;
}
case Parser::Event::Error: {
if(incoming) {
// If we get a parse error during the initial element exchange,
// flip immediately into 'open' mode so that we can report an error.
if(state == RecvOpen) {
sendTagOpen();
state = Open;
}
return handleError();
}
else {
event = EError;
errorCode = ErrParse;
return true;
}
}
}
}
else {
if(state == RecvOpen || stepRequiresElement()) {
need = NNotify;
notify |= NRecv;
return false;
}
}
}
return baseStep(pe);
}
/**
* Handles stream erorrs (\<stream:error/\> element).
*/
void Stream::handleStreamError(const Parser::Event& event)
{
d->lastStreamError = StreamError( event.element() );
emit streamError();
}
