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#include "filedownloader.h"
#include <QNetworkAccessManager>
#include <QNetworkRequest>
// Maximum size of download
#define MAXSIZE (400000)
static QNetworkAccessManager m_WebCtrl;
static void killReply(QNetworkReply *reply);
bool FileDownloader::download(const QUrl& fileUrl, const std::function <void (QNetworkReply::NetworkError, const QByteArray&)>& f) {
QNetworkRequest request(fileUrl);
request.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
QNetworkReply *reply = m_WebCtrl.get(request);
if (reply == nullptr)
return false;
// Handle normal finish
QObject::connect(reply, &QNetworkReply::finished, [reply, f, fileUrl]() {
QByteArray downloadedData(reply->readAll());
killReply(reply);
f(QNetworkReply::NoError, downloadedData);
});
// Handle files that are too large
QObject::connect(reply, &QNetworkReply::downloadProgress, [reply, f, fileUrl](qint64 received, qint64 totalSize) {
if (received > MAXSIZE || totalSize > MAXSIZE) {
qDebug() << fileUrl << "too large";
killReply(reply);
f(QNetworkReply::NetworkError::UnknownNetworkError, QByteArray());
}
});
// Handle errors
QObject::connect(reply, static_cast<void (QNetworkReply::*)(QNetworkReply::NetworkError)>(&QNetworkReply::error),
[reply, f, fileUrl](QNetworkReply::NetworkError err) {
qDebug() << fileUrl << "error" << err;
killReply(reply);
f(err, QByteArray());
});
return true;
}
static void killReply(QNetworkReply *reply) {
if (reply == nullptr)
return;
reply->blockSignals(true);
reply->deleteLater();
}
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