How can I use Qt to get html code of the redirected page??
- by Claire Huang
I'm trying to use Qt to download the html code from the following url:
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=nucleotide&cmd=search&term=AB100362
this url will re-direct to
www.ncbi.nlm.nih.gov/nuccore/27884304
I try to do it by following way, but I cannot get anything.
it works for some webpage such as www.google.com, but not for this NCBI page. is there any way to get this page??
QNetworkReply::NetworkError downloadURL(const QUrl &url, QByteArray &data)
{
QNetworkAccessManager manager;
QNetworkRequest request(url);
QNetworkReply *reply = manager.get(request);
QEventLoop loop;
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
loop.exec();
if (reply->error() != QNetworkReply::NoError)
{
return reply->error();
}
data = reply->readAll();
delete reply;
return QNetworkReply::NoError;
}
void GetGi()
{
int pos;
QString sGetFromURL = "http://www.ncbi.nlm.nih.gov/entrez/query.fcgi";
QUrl url(sGetFromURL);
url.addQueryItem("db", "nucleotide");
url.addQueryItem("cmd", "search");
url.addQueryItem("term", "AB100362");
QByteArray InfoNCBI;
int errorCode = downloadURL(url, InfoNCBI);
if (errorCode != 0 )
{
QMessageBox::about(0,tr("Internet Error "), tr("Internet Error %1: Failed to connect to NCBI.\t\nPlease check your internect connection.").arg(errorCode));
return "ERROR";
}
}
