Unsolved Downloading file using URL in QT
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Hi,
All i want to download a file using url in QT and return content as char *.
i used below code. download is success and content written in a file.
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****************************************************************************/#include <QObject>
#include <QString>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkReply>class QtDownload : public QObject {
Q_OBJECT
public:
explicit QtDownload();
~QtDownload();void setTarget(const QString& t);
private:
QNetworkAccessManager manager;
QString target;signals:
void done();public slots:
void download();
void downloadFinished(QNetworkReply* data);
void downloadProgress(qint64 recieved, qint64 total);
};
#include <QCoreApplication>
#include <QUrl>
#include <QNetworkRequest>
#include <QFile>
#include <QDebug>QtDownload::QtDownload() : QObject(0) {
QObject::connect(&manager, SIGNAL(finished(QNetworkReply*)),this, SLOT(downloadFinished(QNetworkReply*)));
}QtDownload::~QtDownload() {
}
void QtDownload::setTarget(const QString &t) {
this->target = t;
}void QtDownload::downloadFinished(QNetworkReply *data) {
QFile localFile("/home/roi/Desktop/downloadedfile.txt");
if (!localFile.open(QIODevice::WriteOnly))
return;
const QByteArray sdata = data->readAll();
localFile.write(sdata);
qDebug() << sdata;
localFile.close();emit done();
}
void QtDownload::download() {
QUrl url = QUrl::fromEncoded(this->target.toLocal8Bit());
QNetworkRequest request(url);
QObject::connect(manager.get(request), SIGNAL(downloadProgress(qint64,qint64)), this, SLOT(downloadProgress(qint64,qint64)));}
void QtDownload::downloadProgress(qint64 recieved, qint64 total) {
qDebug() << recieved << total;
}
#include <QtCore>
int main(int argc, char **argv) {
QCoreApplication app(argc, argv);
QtDownload dl;
dl.setTarget("http://guest:p2guest@192.168.55.3/contents/2/clip/0711WH.xml");dl.download(); //quit when the download is done. QObject::connect(&dl, SIGNAL(done()), &app, SLOT(quit())); return app.exec();
// return 0;
}
#include "main.moc"but my requirement is download file return its content as char *.
and 2nd thing isi am using it from a fun named as
char * downloadfromUrl(std::wstring szUrl)
{
QString Url= QString::fromStdWString(szUrl);
QtDownload dl;
//dl.setTarget("http://guest:p2guest@192.168.55.3/contents/2/clip/0711WH.xml");
dl.setTarget(Url);dl.download();
}
its not complete.
please help me for completing downloadfromUrl fun as well as downloadFinished().
it will be great help, please suggest me.
signature of downloadfromUrl is char *.
means downloaded content should be return as char *.
Thanks
Shashi -
Hi,
Then add a getter function that returns a char pointer to the start of the buffer you used to store the downloaded file.
-
Thanks Sgaist,
but how i will call. i do not have main(). i have to call it from
ownloadfromUrl(std::wstring szUrl)
{}
i do not have
nt main(int argc, char **argv) {
QCoreApplication app(argc, argv);
}
please suggest.
Thanks
shashi -
Before any suggestion, you should describe your application more precisely.