How to use QNetworkAccesManager ??

Is there any tutorials or example for how to use QNetworkAccessManager with QAuthenticator and QNetworkRequest??
My application contains a step where the user fill in his login and password and connect to a server .
I didn't find too much on this subject on the web .Any help please ??

It's about 5 lines of code.

Connect QNetworkAccessManager::authenticationRequired() to a slot. When the slot is called insert the user name and password matching the requesting site into the supplied QAuthenticator using setUser() and setPassword(). Job done.

Quote:

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Originally Posted by ChrisW67

It's about 5 lines of code.

Connect QNetworkAccessManager::authenticationRequired() to a slot. When the slot is called insert the user name and password matching the requesting site into the supplied QAuthenticator using setUser() and setPassword(). Job done.

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Please could you give me a code example which is verified because i tried that and didn't work for me.

Code:

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#include <QCoreApplication>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QAuthenticator>
#include <QDebug>
 
static const QUrl url("http://test-host/");
static const char *user = "user";
static const char *password = "password";
 
class Downloader: public QObject
{
    Q_OBJECT
 
    QNetworkAccessManager nam;
    QNetworkReply *reply;
 
public:
    Downloader(QObject * p=0): reply(0) {
        connect(&nam,
            SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)),
            SLOT(authRequired(QNetworkReply*,QAuthenticator*)));
    }
 
    void run() {
        QNetworkRequest req(url);
        reply = nam.get(req);
        connect(reply, SIGNAL(finished()), SLOT(done()));
    }
 
public slots:
    void authRequired(QNetworkReply *reply, QAuthenticator *authenticator) {
        qDebug() << Q_FUNC_INFO << authenticator->realm();
        // get user name and password from user for authenticator->realm()
        // if (not cancelled) set the details otherwise don't
        authenticator->setUser(user);
        authenticator->setPassword(password);
    }
 
    void done() {
        qDebug() << reply->readAll();
        qApp->quit();
    }
};
 
int main(int argc, char **argv) {
    QCoreApplication app(argc, argv);
    Downloader d;
    d.run();
    return app.exec();
}
 
#include "main.moc"

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Please be aware that this is how you handle the web server requesting authentication. This has nothing to do with handling web-applications requesting credentials: each of those is different but generally some form of HTML form.