/*!
\reimp
*/
QIODevice *QNetworkDiskCache::prepare(const QNetworkCacheMetaData &metaData)
{
#if defined(QNETWORKDISKCACHE_DEBUG)
qDebug() << "QNetworkDiskCache::prepare()" << metaData.url();
#endif
Q_D(QNetworkDiskCache);
if (!metaData.isValid() || !metaData.url().isValid() || !metaData.saveToDisk())
return 0;
if (d->cacheDirectory.isEmpty()) {
qWarning() << "QNetworkDiskCache::prepare() The cache directory is not set";
return 0;
}
foreach (const QNetworkCacheMetaData::RawHeader &header, metaData.rawHeaders()) {
if (header.first.toLower() == "content-length") {
const qint64 size = header.second.toLongLong();
if (size > (maximumCacheSize() * 3)/4)
return 0;
break;
}
}
QScopedPointer<QCacheItem> cacheItem(new QCacheItem);
cacheItem->metaData = metaData;
QIODevice *device = 0;
if (cacheItem->canCompress()) {
cacheItem->data.open(QBuffer::ReadWrite);
device = &(cacheItem->data);
} else {
QString templateName = d->tmpCacheFileName();
QT_TRY {
cacheItem->file = new QTemporaryFile(templateName, &cacheItem->data);
} QT_CATCH(...) {
cacheItem->file = 0;
}
if (!cacheItem->file || !cacheItem->file->open()) {
qWarning() << "QNetworkDiskCache::prepare() unable to open temporary file";
cacheItem.reset();
return 0;
}
cacheItem->writeHeader(cacheItem->file);
device = cacheItem->file;
}
d->inserting[device] = cacheItem.take();
return device;
}
/*!
adds \a offset using key \a key. \a itemType is the type of the structure,
where offset points to.
Only acceptable separator for key is '/'.
doesn't check, if the item is already in the cache.
*/
bool HbSharedCache::add(ItemType itemType, const QString &key, int offset)
{
bool added = false;
if (offset >= 0) {
QString cacheKey(key);
if (cacheKey.at(0) == ':') {
//use only filename as a key.
int index = cacheKey.lastIndexOf('/');
if (index >= 0) {
cacheKey = cacheKey.right((cacheKey.size() - 1) - index);
}
}
try {
CacheItem cacheItem(cacheKey, offset);
HbVector<CacheItem> &vector = itemCache(itemType);
HbCacheLocker locker(*Semaphore);
vector.append(cacheItem);
added = true;
} catch (std::exception &) {
}
}
return added;
}