[Solved]How can I get filesize of file at remote server?

[SetBetterPass]

I have project in which I need to get file name and size of file at some remote server. I have URL for example http://www.example.com/picture.png. It's easy to get file name, I just pick last part of URL, but I have no idea how to get file size. Any ideas how can i get it?

[bepehr]

check QNetworkRequest and content-length

[SetBetterPass]

I made function:
@
void MainWindow::fileSize(){
QNetworkRequest req;
QUrl url(UrlList.at(0));
req.setHeader(QNetworkRequest::ContentLengthHeader);
req.setUrl(url);
QNetworkAccessManager manager;
QNetworkReply* reply__ = manager.get(req);
FileSize = reply__->header(QNetworkRequest::ContentLengthHeader).toUInt();
}
@
but that doesn't work and I get error : no matching function for call to ‘QNetworkRequest::setHeader(QNetworkRequest::KnownHeaders)’
candidates are: void QNetworkRequest::setHeader(QNetworkRequest::KnownHeaders, const QVariant&)

what to put in as 'const QVariant&'? I tried to find some examples but only what I found were examples with POST where original data came from users computer but I need to get info about data at remote server...
I also put there random number just to try and it run without error but I got no reply.

[10Htts]

Here a way to get the file size:
@reply = manager->get(*request);
connect(reply,SIGNAL(downloadProgress(qint64,qint64)),SLOT(downloadProgress(qint64,qint64)));@
The second qint64 is the file size.
Hope it helps...

[SetBetterPass]

I already done it, previous code was wrong I changed it to:
@
void MainWindow::fileSize(){
FileSize=0;
QNetworkRequest req;
manager = new QNetworkAccessManager(this); //cannot be local var
req.setUrl(QUrl(UrlList.at(0)));
reply__ = manager->head(req);
connect(reply__,SIGNAL(finished()),this,SLOT(num()));
}
void MainWindow::num(){
FileSize = reply__->header(QNetworkRequest::ContentLengthHeader).toUInt();
reply__->deleteLater();
manager->deleteLater();
}
@

Actually this works for me so giving it here if someone have this problem once :)
And 10Htts I didn't want to download the file, only get info.