bool QNetworkAccessFileBackend::readMoreFromFile()
{
qint64 wantToRead;
while ((wantToRead = nextDownstreamBlockSize()) > 0) {
// ### FIXME!!
// Obtain a pointer from the ringbuffer!
// Avoid extra copy
QByteArray data;
data.reserve(wantToRead);
qint64 actuallyRead = file.read(data.data(), wantToRead);
if (actuallyRead <= 0) {
// EOF or error
if (file.error() != QFile::NoError) {
QString msg = QCoreApplication::translate("QNetworkAccessFileBackend", "Read error reading from %1: %2")
.arg(url().toString(), file.errorString());
error(QNetworkReply::ProtocolFailure, msg);
finished();
return false;
}
finished();
return true;
}
data.resize(actuallyRead);
totalBytes += actuallyRead;
QByteDataBuffer list;
list.append(data);
data.clear(); // important because of implicit sharing!
writeDownstreamData(list);
}
return true;
}
void QNetworkAccessDebugPipeBackend::pushFromSocketToDownstream()
{
QByteArray buffer;
if (socket.state() == QAbstractSocket::ConnectingState) {
return;
}
forever {
if (hasDownloadFinished)
return;
buffer.resize(ReadBufferSize);
qint64 haveRead = socket.read(buffer.data(), ReadBufferSize);
if (haveRead == -1) {
hasDownloadFinished = true;
// this ensures a good last downloadProgress is emitted
setHeader(QNetworkRequest::ContentLengthHeader, QVariant());
possiblyFinish();
break;
} else if (haveRead == 0) {
break;
} else {
// have read something
buffer.resize(haveRead);
bytesDownloaded += haveRead;
QByteDataBuffer list;
list.append(buffer);
buffer.clear(); // important because of implicit sharing!
writeDownstreamData(list);
}
}
}
void QNetworkAccessHttpBackend::readFromHttp()
{
// We implement the download rate control
// Don't read from QHttpNetworkAccess more than QNetworkAccessBackend wants
// One of the two functions above will be called when we can read again
qint64 bytesToRead = qBound<qint64>(0, httpReply->bytesAvailable(), nextDownstreamBlockSize());
if (!bytesToRead)
return;
QByteArray data = httpReply->read(bytesToRead);
writeDownstreamData(data);
}
bool QNetworkAccessCacheBackend::sendCacheContents()
{
setCachingEnabled(false);
QAbstractNetworkCache *nc = networkCache();
if (!nc)
return false;
QNetworkCacheMetaData item = nc->metaData(url());
if (!item.isValid())
return false;
QNetworkCacheMetaData::AttributesMap attributes = item.attributes();
setAttribute(QNetworkRequest::HttpStatusCodeAttribute, attributes.value(QNetworkRequest::HttpStatusCodeAttribute));
setAttribute(QNetworkRequest::HttpReasonPhraseAttribute, attributes.value(QNetworkRequest::HttpReasonPhraseAttribute));
// set the raw headers
QNetworkCacheMetaData::RawHeaderList rawHeaders = item.rawHeaders();
QNetworkCacheMetaData::RawHeaderList::ConstIterator it = rawHeaders.constBegin(),
end = rawHeaders.constEnd();
for ( ; it != end; ++it) {
if (it->first.toLower() == "cache-control" &&
it->second.toLower().contains("must-revalidate")) {
return false;
}
setRawHeader(it->first, it->second);
}
// handle a possible redirect
QVariant redirectionTarget = attributes.value(QNetworkRequest::RedirectionTargetAttribute);
if (redirectionTarget.isValid()) {
setAttribute(QNetworkRequest::RedirectionTargetAttribute, redirectionTarget);
redirectionRequested(redirectionTarget.toUrl());
}
// signal we're open
metaDataChanged();
if (operation() == QNetworkAccessManager::GetOperation) {
QIODevice *contents = nc->data(url());
if (!contents)
return false;
contents->setParent(this);
writeDownstreamData(contents);
}
#if defined(QNETWORKACCESSCACHEBACKEND_DEBUG)
qDebug() << "Successfully sent cache:" << url();
#endif
return true;
}
void QNetworkAccessHttpBackend::readFromHttp()
{
if (!httpReply)
return;
// We read possibly more than nextDownstreamBlockSize(), but
// this is not a critical thing since it is already in the
// memory anyway
QByteDataBuffer list;
while (httpReply->bytesAvailable() != 0 && nextDownstreamBlockSize() != 0 && nextDownstreamBlockSize() > list.byteAmount()) {
list.append(httpReply->readAny());
}
if (!list.isEmpty())
writeDownstreamData(list);
}
/*
A simple web page that can be used to test us: http://www.procata.com/cachetest/
*/
bool QNetworkAccessHttpBackend::sendCacheContents(const QNetworkCacheMetaData &metaData)
{
setCachingEnabled(false);
if (!metaData.isValid())
return false;
QAbstractNetworkCache *nc = networkCache();
Q_ASSERT(nc);
QIODevice *contents = nc->data(url());
if (!contents) {
#if defined(QNETWORKACCESSHTTPBACKEND_DEBUG)
qDebug() << "Can not send cache, the contents are 0" << url();
#endif
return false;
}
contents->setParent(this);
QNetworkCacheMetaData::AttributesMap attributes = metaData.attributes();
int status = attributes.value(QNetworkRequest::HttpStatusCodeAttribute).toInt();
if (status < 100)
status = 200; // fake it
setAttribute(QNetworkRequest::HttpStatusCodeAttribute, status);
setAttribute(QNetworkRequest::HttpReasonPhraseAttribute, attributes.value(QNetworkRequest::HttpReasonPhraseAttribute));
setAttribute(QNetworkRequest::SourceIsFromCacheAttribute, true);
QNetworkCacheMetaData::RawHeaderList rawHeaders = metaData.rawHeaders();
QNetworkCacheMetaData::RawHeaderList::ConstIterator it = rawHeaders.constBegin(),
end = rawHeaders.constEnd();
for ( ; it != end; ++it)
setRawHeader(it->first, it->second);
checkForRedirect(status);
writeDownstreamData(contents);
#if defined(QNETWORKACCESSHTTPBACKEND_DEBUG)
qDebug() << "Successfully sent cache:" << url() << contents->size() << "bytes";
#endif
if (httpReply)
disconnect(httpReply, SIGNAL(finished()), this, SLOT(replyFinished()));
return true;
}
void QNetworkAccessDataBackend::open()
{
QUrl uri = request().url();
if (operation() != QNetworkAccessManager::GetOperation &&
operation() != QNetworkAccessManager::HeadOperation) {
// data: doesn't support anything but GET
const QString msg = QCoreApplication::translate("QNetworkAccessDataBackend",
"Operation not supported on %1")
.arg(uri.toString());
error(QNetworkReply::ContentOperationNotPermittedError, msg);
finished();
return;
}
QPair<QString, QByteArray> decoded = qDecodeDataUrl(uri);
if (! decoded.first.isNull()) {
setHeader(QNetworkRequest::ContentTypeHeader, decoded.first);
setHeader(QNetworkRequest::ContentLengthHeader, decoded.second.size());
emit metaDataChanged();
QByteDataBuffer list;
list.append(decoded.second);
decoded.second.clear(); // important because of implicit sharing!
writeDownstreamData(list);
finished();
return;
}
// something wrong with this URI
const QString msg = QCoreApplication::translate("QNetworkAccessDataBackend",
"Invalid URI: %1").arg(uri.toString());
error(QNetworkReply::ProtocolFailure, msg);
finished();
}
void QNetworkAccessDataBackend::open()
{
QUrl uri = request().url();
if (operation() != QNetworkAccessManager::GetOperation &&
operation() != QNetworkAccessManager::HeadOperation) {
// data: doesn't support anything but GET
QString msg = QObject::tr("Operation not supported on %1")
.arg(uri.toString());
error(QNetworkReply::ContentOperationNotPermittedError, msg);
finished();
return;
}
if (uri.host().isEmpty()) {
setHeader(QNetworkRequest::ContentTypeHeader, QLatin1String("text/plain;charset=US-ASCII"));
// the following would have been the correct thing, but
// reality often differs from the specification. People have
// data: URIs with ? and #
//QByteArray data = QByteArray::fromPercentEncoding(uri.encodedPath());
QByteArray data = QByteArray::fromPercentEncoding(uri.toEncoded());
// remove the data: scheme
data.remove(0, 5);
// parse it:
int pos = data.indexOf(',');
if (pos != -1) {
QByteArray payload = data.mid(pos + 1);
data.truncate(pos);
data = data.trimmed();
// find out if the payload is encoded in Base64
if (data.endsWith(";base64")) {
payload = QByteArray::fromBase64(payload);
data.chop(7);
}
if (data.toLower().startsWith("charset")) {
int i = 7; // strlen("charset")
while (data.at(i) == ' ')
++i;
if (data.at(i) == '=')
data.prepend("text/plain;");
}
if (!data.isEmpty())
setHeader(QNetworkRequest::ContentTypeHeader, data.trimmed());
setHeader(QNetworkRequest::ContentLengthHeader, payload.size());
emit metaDataChanged();
writeDownstreamData(payload);
finished();
return;
}
}
// something wrong with this URI
QString msg = QObject::tr("Invalid URI: %1").arg(uri.toString());
error(QNetworkReply::ProtocolFailure, msg);
finished();
}
