void QHttpNetworkConnectionChannel::_q_receiveReply()
{
Q_ASSERT(socket);
if (!reply) {
// heh, how should that happen!
qWarning() << "QHttpNetworkConnectionChannel::_q_receiveReply() called without QHttpNetworkReply,"
<< socket->bytesAvailable() << "bytes on socket.";
close();
return;
}
// only run when the QHttpNetworkConnection is not currently being destructed, e.g.
// this function is called from _q_disconnected which is called because
// of ~QHttpNetworkConnectionPrivate
if (!qobject_cast<QHttpNetworkConnection*>(connection)) {
return;
}
QAbstractSocket::SocketState socketState = socket->state();
// connection might be closed to signal the end of data
if (socketState == QAbstractSocket::UnconnectedState) {
if (socket->bytesAvailable() <= 0) {
if (reply->d_func()->state == QHttpNetworkReplyPrivate::ReadingDataState) {
// finish this reply. this case happens when the server did not send a content length
reply->d_func()->state = QHttpNetworkReplyPrivate::AllDoneState;
allDone();
return;
} else {
handleUnexpectedEOF();
return;
}
} else {
// socket not connected but still bytes for reading.. just continue in this function
}
}
// read loop for the response
qint64 bytes = 0;
qint64 lastBytes = bytes;
do {
lastBytes = bytes;
QHttpNetworkReplyPrivate::ReplyState state = reply->d_func()->state;
switch (state) {
case QHttpNetworkReplyPrivate::NothingDoneState: {
state = reply->d_func()->state = QHttpNetworkReplyPrivate::ReadingStatusState;
// fallthrough
}
case QHttpNetworkReplyPrivate::ReadingStatusState: {
qint64 statusBytes = reply->d_func()->readStatus(socket);
if (statusBytes == -1) {
// connection broke while reading status. also handled if later _q_disconnected is called
handleUnexpectedEOF();
return;
}
bytes += statusBytes;
lastStatus = reply->d_func()->statusCode;
break;
}
case QHttpNetworkReplyPrivate::ReadingHeaderState: {
QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
qint64 headerBytes = replyPrivate->readHeader(socket);
if (headerBytes == -1) {
// connection broke while reading headers. also handled if later _q_disconnected is called
handleUnexpectedEOF();
return;
}
bytes += headerBytes;
// If headers were parsed successfully now it is the ReadingDataState
if (replyPrivate->state == QHttpNetworkReplyPrivate::ReadingDataState) {
if (replyPrivate->isCompressed() && replyPrivate->autoDecompress) {
// remove the Content-Length from header
replyPrivate->removeAutoDecompressHeader();
} else {
replyPrivate->autoDecompress = false;
}
if (replyPrivate->statusCode == 100) {
replyPrivate->clearHttpLayerInformation();
replyPrivate->state = QHttpNetworkReplyPrivate::ReadingStatusState;
break; // ignore
}
if (replyPrivate->shouldEmitSignals())
emit reply->headerChanged();
// After headerChanged had been emitted
// we can suddenly have a replyPrivate->userProvidedDownloadBuffer
// this is handled in the ReadingDataState however
if (!replyPrivate->expectContent()) {
replyPrivate->state = QHttpNetworkReplyPrivate::AllDoneState;
allDone();
break;
}
}
break;
}
case QHttpNetworkReplyPrivate::ReadingDataState: {
QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
if (socket->state() == QAbstractSocket::ConnectedState &&
replyPrivate->downstreamLimited && !replyPrivate->responseData.isEmpty() && replyPrivate->shouldEmitSignals()) {
// (only do the following when still connected, not when we have already been disconnected and there is still data)
// We already have some HTTP body data. We don't read more from the socket until
// this is fetched by QHttpNetworkAccessHttpBackend. If we would read more,
// we could not limit our read buffer usage.
// We only do this when shouldEmitSignals==true because our HTTP parsing
// always needs to parse the 401/407 replies. Therefore they don't really obey
// to the read buffer maximum size, but we don't care since they should be small.
return;
}
if (replyPrivate->userProvidedDownloadBuffer) {
// the user provided a direct buffer where we should put all our data in.
// this only works when we can tell the user the content length and he/she can allocate
// the buffer in that size.
// note that this call will read only from the still buffered data
qint64 haveRead = replyPrivate->readBodyVeryFast(socket, replyPrivate->userProvidedDownloadBuffer + replyPrivate->totalProgress);
if (haveRead > 0) {
bytes += haveRead;
replyPrivate->totalProgress += haveRead;
// the user will get notified of it via progress signal
emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
} else if (haveRead == 0) {
// Happens since this called in a loop. Currently no bytes available.
} else if (haveRead < 0) {
connection->d_func()->emitReplyError(socket, reply, QNetworkReply::RemoteHostClosedError);
break;
}
} else if (!replyPrivate->isChunked() && !replyPrivate->autoDecompress
&& replyPrivate->bodyLength > 0) {
// bulk files like images should fulfill these properties and
// we can therefore save on memory copying
qint64 haveRead = replyPrivate->readBodyFast(socket, &replyPrivate->responseData);
bytes += haveRead;
replyPrivate->totalProgress += haveRead;
if (replyPrivate->shouldEmitSignals()) {
emit reply->readyRead();
emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
}
}
else
{
// use the traditional slower reading (for compressed encoding, chunked encoding,
// no content-length etc)
qint64 haveRead = replyPrivate->readBody(socket, &replyPrivate->responseData);
if (haveRead > 0) {
bytes += haveRead;
replyPrivate->totalProgress += haveRead;
if (replyPrivate->shouldEmitSignals()) {
emit reply->readyRead();
emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
}
} else if (haveRead == -1) {
// Some error occured
connection->d_func()->emitReplyError(socket, reply, QNetworkReply::ProtocolFailure);
break;
}
}
// still in ReadingDataState? This function will be called again by the socket's readyRead
if (replyPrivate->state == QHttpNetworkReplyPrivate::ReadingDataState)
break;
// everything done, fall through
}
case QHttpNetworkReplyPrivate::AllDoneState:
allDone();
break;
default:
break;
}
} while (bytes != lastBytes && reply);
}
void QHttpNetworkConnectionChannel::_q_receiveReply()
{
Q_ASSERT(socket);
if (!reply) {
// heh, how should that happen!
qWarning() << "QHttpNetworkConnectionChannel::_q_receiveReply() called without QHttpNetworkReply,"
<< socket->bytesAvailable() << "bytes on socket.";
close();
return;
}
// only run when the QHttpNetworkConnection is not currently being destructed, e.g.
// this function is called from _q_disconnected which is called because
// of ~QHttpNetworkConnectionPrivate
if (!qobject_cast<QHttpNetworkConnection*>(connection)) {
return;
}
qint64 bytes = 0;
QAbstractSocket::SocketState socketState = socket->state();
// connection might be closed to signal the end of data
if (socketState == QAbstractSocket::UnconnectedState) {
if (socket->bytesAvailable() <= 0) {
if (reply->d_func()->state == QHttpNetworkReplyPrivate::ReadingDataState) {
// finish this reply. this case happens when the server did not send a content length
reply->d_func()->state = QHttpNetworkReplyPrivate::AllDoneState;
allDone();
return;
} else {
handleUnexpectedEOF();
return;
}
} else {
// socket not connected but still bytes for reading.. just continue in this function
}
}
// read loop for the response
while (socket->bytesAvailable()) {
QHttpNetworkReplyPrivate::ReplyState state = reply->d_func()->state;
switch (state) {
case QHttpNetworkReplyPrivate::NothingDoneState: {
// only eat whitespace on the first call
eatWhitespace();
state = reply->d_func()->state = QHttpNetworkReplyPrivate::ReadingStatusState;
// fallthrough
}
case QHttpNetworkReplyPrivate::ReadingStatusState: {
qint64 statusBytes = reply->d_func()->readStatus(socket);
if (statusBytes == -1) {
// connection broke while reading status. also handled if later _q_disconnected is called
handleUnexpectedEOF();
return;
}
bytes += statusBytes;
lastStatus = reply->d_func()->statusCode;
break;
}
case QHttpNetworkReplyPrivate::ReadingHeaderState: {
QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
qint64 headerBytes = replyPrivate->readHeader(socket);
if (headerBytes == -1) {
// connection broke while reading headers. also handled if later _q_disconnected is called
handleUnexpectedEOF();
return;
}
bytes += headerBytes;
if (replyPrivate->state == QHttpNetworkReplyPrivate::ReadingDataState) {
if (replyPrivate->isGzipped() && replyPrivate->autoDecompress) {
// remove the Content-Length from header
replyPrivate->removeAutoDecompressHeader();
} else {
replyPrivate->autoDecompress = false;
}
if (replyPrivate->statusCode == 100) {
replyPrivate->clearHttpLayerInformation();
replyPrivate->state = QHttpNetworkReplyPrivate::ReadingStatusState;
break; // ignore
}
if (replyPrivate->shouldEmitSignals())
emit reply->headerChanged();
if (!replyPrivate->expectContent()) {
replyPrivate->state = QHttpNetworkReplyPrivate::AllDoneState;
allDone();
break;
}
}
break;
}
case QHttpNetworkReplyPrivate::ReadingDataState: {
QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
if (replyPrivate->downstreamLimited && !replyPrivate->responseData.isEmpty() && replyPrivate->shouldEmitSignals()) {
// We already have some HTTP body data. We don't read more from the socket until
// this is fetched by QHttpNetworkAccessHttpBackend. If we would read more,
// we could not limit our read buffer usage.
// We only do this when shouldEmitSignals==true because our HTTP parsing
// always needs to parse the 401/407 replies. Therefore they don't really obey
// to the read buffer maximum size, but we don't care since they should be small.
return;
}
if (!replyPrivate->isChunked() && !replyPrivate->autoDecompress
&& replyPrivate->bodyLength > 0) {
// bulk files like images should fulfill these properties and
// we can therefore save on memory copying
bytes = replyPrivate->readBodyFast(socket, &replyPrivate->responseData);
replyPrivate->totalProgress += bytes;
if (replyPrivate->shouldEmitSignals()) {
QPointer<QHttpNetworkReply> replyPointer = reply;
emit reply->readyRead();
// make sure that the reply is valid
if (replyPointer.isNull())
return;
emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
// make sure that the reply is valid
if (replyPointer.isNull())
return;
}
}
else
{
// use the traditional slower reading (for compressed encoding, chunked encoding,
// no content-length etc)
QByteDataBuffer byteDatas;
bytes = replyPrivate->readBody(socket, &byteDatas);
if (bytes) {
if (replyPrivate->autoDecompress)
replyPrivate->appendCompressedReplyData(byteDatas);
else
replyPrivate->appendUncompressedReplyData(byteDatas);
if (!replyPrivate->autoDecompress) {
replyPrivate->totalProgress += bytes;
if (replyPrivate->shouldEmitSignals()) {
QPointer<QHttpNetworkReply> replyPointer = reply;
// important: At the point of this readyRead(), the byteDatas list must be empty,
// else implicit sharing will trigger memcpy when the user is reading data!
emit reply->readyRead();
// make sure that the reply is valid
if (replyPointer.isNull())
return;
emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
// make sure that the reply is valid
if (replyPointer.isNull())
return;
}
}
#ifndef QT_NO_COMPRESS
else if (!expand(false)) { // expand a chunk if possible
return; // ### expand failed
}
#endif
}
}
// still in ReadingDataState? This function will be called again by the socket's readyRead
if (replyPrivate->state == QHttpNetworkReplyPrivate::ReadingDataState)
break;
// everything done, fall through
}
case QHttpNetworkReplyPrivate::AllDoneState:
allDone();
break;
default:
break;
}
}
}
