Net::DownloadHandler *Net::DownloadManager::download(const DownloadRequest &downloadRequest)
{
// Process download request
const QNetworkRequest request = createNetworkRequest(downloadRequest);
const ServiceID id = ServiceID::fromURL(request.url());
const bool isSequentialService = m_sequentialServices.contains(id);
auto downloadHandler = new DownloadHandlerImpl {downloadRequest, this};
connect(downloadHandler, &DownloadHandler::finished, downloadHandler, &QObject::deleteLater);
connect(downloadHandler, &QObject::destroyed, this, [this, id, downloadHandler]()
{
m_waitingJobs[id].removeOne(downloadHandler);
});
if (!isSequentialService || !m_busyServices.contains(id)) {
qDebug("Downloading %s...", qUtf8Printable(downloadRequest.url()));
if (isSequentialService)
m_busyServices.insert(id);
downloadHandler->assignNetworkReply(m_networkManager.get(request));
}
else {
m_waitingJobs[id].enqueue(downloadHandler);
}
return downloadHandler;
}
Net::DownloadHandler::DownloadHandler(QNetworkReply *reply, DownloadManager *manager, const DownloadRequest &downloadRequest)
: QObject(manager)
, m_reply(reply)
, m_manager(manager)
, m_downloadRequest(downloadRequest)
{
if (reply)
assignNetworkReply(reply);
}
void Net::DownloadManager::handleReplyFinished(const QNetworkReply *reply)
{
const ServiceID id = ServiceID::fromURL(reply->url());
const auto waitingJobsIter = m_waitingJobs.find(id);
if ((waitingJobsIter == m_waitingJobs.end()) || waitingJobsIter.value().isEmpty()) {
m_busyServices.remove(id);
return;
}
auto handler = static_cast<DownloadHandlerImpl *>(waitingJobsIter.value().dequeue());
qDebug("Downloading %s...", qUtf8Printable(handler->url()));
handler->assignNetworkReply(m_networkManager.get(createNetworkRequest(handler->downloadRequest())));
handler->disconnect(this);
}