How to use QNetworkAccesManager ??

[sliverTwist]

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 ??

[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.

[sliverTwist]

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.

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

[ChrisW67]

#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"

#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"

To copy to clipboard, switch view to plain text mode 

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.