path: root/src/FileDownloader.cpp

/*
 * FileDownloader.cpp
 *
 *  Created on: Mar 7, 2014
 *      Author: nils
 */

#include <QFileInfo>

#include "FileDownloader.h"

// Maximum size of download
#define MAXSIZE (200000)

static QNetworkAccessManager m_WebCtrl;

FileDownloader::FileDownloader(const QUrl& fileUrl, QObject *parent) :
	QObject(parent), started(false), url(fileUrl) {
}

FileDownloader::~FileDownloader() {

}

bool FileDownloader::downloadFile() {
	if (this->started)
		return true;
	QNetworkReply *reply = m_WebCtrl.get(QNetworkRequest(this->url));
	if (reply == NULL)
		return false;
	this->started = true;
	connect(reply, SIGNAL(finished()), SLOT(fileDownloaded()));
	connect(reply, SIGNAL(downloadProgress(qint64, qint64)), SLOT(downloadProgress(qint64, qint64)));
	return true;
}

/*
 * Slots from networkreply
 */

void FileDownloader::downloadFailed(QNetworkReply::NetworkError) {
	QNetworkReply *reply = (QNetworkReply*)this->sender();
	killReply(reply);
	emit downloaded(this->url, QByteArray());
}

void FileDownloader::fileDownloaded() {
	QNetworkReply *reply = (QNetworkReply*)this->sender();
	if (reply == NULL)
		return;
	QByteArray downloadedData(reply->readAll());
	killReply(reply);
	//emit a signal
	emit downloaded(this->url, downloadedData);
}

void FileDownloader::downloadProgress(qint64 received, qint64 totalSize) {
	QNetworkReply *reply = (QNetworkReply*)this->sender();
	if (reply == NULL)
		return;
	if (received > MAXSIZE || totalSize > MAXSIZE) {
		killReply(reply);
		emit downloaded(this->url, QByteArray());
	}
}

void FileDownloader::killReply(QNetworkReply *reply) {
	if (reply == NULL)
		return;
	reply->blockSignals(true);
	reply->abort();
	reply->deleteLater();
}