Question

I’m looking to do a very simple POST request to a webpage. The page is in php and will take whatever is posted check it against a database then respond with a key if the item is in the database.

I have not a clue how to use post requests inside Qt or how to get information returned and store it back into a variable within Qt. Any help would be highly appreciated as I am starting from a blank on the Qt side.

I’ve looked at the other examples:

https://stackoverflow.com/questions/11348359/qt-https-post-request

How can I POST data to a url using QNetworkAccessManager

but I don’t see how to store a response from the php script

Answer 1

Connect the QNetworkAccessManager signal finished to your slot and using QNetworkReply you should read all the contents of the webpage.

Here is a get example it can be easily adapted for the post method.

void MainWindow::on_pushButton_clicked()
{
    QNetworkAccessManager * mgr = new QNetworkAccessManager(this);
    connect(mgr,SIGNAL(finished(QNetworkReply*)),this,SLOT(onfinish(QNetworkReply*)));
    connect(mgr,SIGNAL(finished(QNetworkReply*)),mgr,SLOT(deleteLater()));

    mgr->get(QNetworkRequest(QUrl("http://www.google.com")));

}

void MainWindow::onfinish(QNetworkReply *rep)
{
    QByteArray bts = rep->readAll();
    QString str(bts);
    QMessageBox::information(this,"sal",str,"ok");

}