Пример #1
0
void QNetworkReplyImplPrivate::initCacheSaveDevice()
{
    Q_Q(QNetworkReplyImpl);

    // save the meta data
    QNetworkCacheMetaData metaData;
    metaData.setUrl(url);
    metaData = backend->fetchCacheMetaData(metaData);

    // save the redirect request also in the cache
    QVariant redirectionTarget = q->attribute(QNetworkRequest::RedirectionTargetAttribute);
    if (redirectionTarget.isValid()) {
        QNetworkCacheMetaData::AttributesMap attributes = metaData.attributes();
        attributes.insert(QNetworkRequest::RedirectionTargetAttribute, redirectionTarget);
        metaData.setAttributes(attributes);
    }

    cacheSaveDevice = networkCache()->prepare(metaData);

    if (!cacheSaveDevice || (cacheSaveDevice && !cacheSaveDevice->isOpen())) {
        if (cacheSaveDevice && !cacheSaveDevice->isOpen())
            qCritical("QNetworkReplyImpl: network cache returned a device that is not open -- "
                  "class %s probably needs to be fixed",
                  networkCache()->metaObject()->className());

        networkCache()->remove(url);
        cacheSaveDevice = 0;
        cacheEnabled = false;
    }
}
Пример #2
0
void QNetworkReplyImplPrivate::initCacheSaveDevice()
{
    Q_Q(QNetworkReplyImpl);

    // The disk cache does not support partial content, so don't even try to
    // save any such content into the cache.
    if (q->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 206) {
        cacheEnabled = false;
        return;
    }

    // save the meta data
    QNetworkCacheMetaData metaData;
    metaData.setUrl(url);
    metaData = backend->fetchCacheMetaData(metaData);

    // save the redirect request also in the cache
    QVariant redirectionTarget = q->attribute(QNetworkRequest::RedirectionTargetAttribute);
    if (redirectionTarget.isValid()) {
        QNetworkCacheMetaData::AttributesMap attributes = metaData.attributes();
        attributes.insert(QNetworkRequest::RedirectionTargetAttribute, redirectionTarget);
        metaData.setAttributes(attributes);
    }

    cacheSaveDevice = networkCache()->prepare(metaData);

    if (!cacheSaveDevice || (cacheSaveDevice && !cacheSaveDevice->isOpen())) {
        if (cacheSaveDevice && !cacheSaveDevice->isOpen())
            qCritical("QNetworkReplyImpl: network cache returned a device that is not open -- "
                  "class %s probably needs to be fixed",
                  networkCache()->metaObject()->className());

        networkCache()->remove(url);
        cacheSaveDevice = 0;
        cacheEnabled = false;
    } else {
        q->connect(networkCache(), SIGNAL(destroyed()), SLOT(_q_cacheDestroyed()));
    }
}
Пример #3
0
// we received downstream data and send this to the cache
// and to our readBuffer (which in turn gets read by the user of QNetworkReply)
void QNetworkReplyImplPrivate::appendDownstreamData(QByteDataBuffer &data)
{
    Q_Q(QNetworkReplyImpl);
    if (!q->isOpen())
        return;

    if (cacheEnabled && !cacheSaveDevice) {
        // save the meta data
        QNetworkCacheMetaData metaData;
        metaData.setUrl(url);
        metaData = backend->fetchCacheMetaData(metaData);

        // save the redirect request also in the cache
        QVariant redirectionTarget = q->attribute(QNetworkRequest::RedirectionTargetAttribute);
        if (redirectionTarget.isValid()) {
            QNetworkCacheMetaData::AttributesMap attributes = metaData.attributes();
            attributes.insert(QNetworkRequest::RedirectionTargetAttribute, redirectionTarget);
            metaData.setAttributes(attributes);
        }

        cacheSaveDevice = networkCache()->prepare(metaData);

        if (!cacheSaveDevice || (cacheSaveDevice && !cacheSaveDevice->isOpen())) {
            if (cacheSaveDevice && !cacheSaveDevice->isOpen())
                qCritical("QNetworkReplyImpl: network cache returned a device that is not open -- "
                      "class %s probably needs to be fixed",
                      networkCache()->metaObject()->className());

            networkCache()->remove(url);
            cacheSaveDevice = 0;
            cacheEnabled = false;
        }
    }

    qint64 bytesWritten = 0;
    for (int i = 0; i < data.bufferCount(); i++) {
        QByteArray item = data[i];

        if (cacheSaveDevice)
            cacheSaveDevice->write(item.constData(), item.size());
        readBuffer.append(item);

        bytesWritten += item.size();
    }
    data.clear();

    bytesDownloaded += bytesWritten;
    lastBytesDownloaded = bytesDownloaded;

    QPointer<QNetworkReplyImpl> qq = q;

    QVariant totalSize = cookedHeaders.value(QNetworkRequest::ContentLengthHeader);
    if (preMigrationDownloaded != Q_INT64_C(-1))
        totalSize = totalSize.toLongLong() + preMigrationDownloaded;
    pauseNotificationHandling();
    emit q->downloadProgress(bytesDownloaded,
                             totalSize.isNull() ? Q_INT64_C(-1) : totalSize.toLongLong());
    // important: At the point of this readyRead(), the data parameter list must be empty,
    // else implicit sharing will trigger memcpy when the user is reading data!
    emit q->readyRead();

    // hopefully we haven't been deleted here
    if (!qq.isNull()) {
        resumeNotificationHandling();
        // do we still have room in the buffer?
        if (nextDownstreamBlockSize() > 0)
            backendNotify(QNetworkReplyImplPrivate::NotifyDownstreamReadyWrite);
    }
}