simple test connection

[dousdou]

i like to help me to do a simple test connexion (i have a button and i like whene i cliced it take the adresse ip and do a test if it's ok it will show me "host is connected" else "host is not connected" .
so can you help me and give me the code sorce of this app plz i realy need it

[unit]

Do you want to have button, textedit for IP input and then try connect to host with this IP?

[dousdou]

yes this is it

[unit]

Ok. simple example tcp connect to 80 port.

void MainWindow::on_pushButton_clicked()
{
    ui->label->setText("");
    connect(mysocket,SIGNAL(connected()),this,SLOT(on_connected()));
    connect(mysocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(on_error(QAbstractSocket::SocketError)));
    mysocket->connectToHost(ui->lineEdit->text(), 80);
}
 
void MainWindow::on_error(QAbstractSocket::SocketError socketError)
{
    ui->label->setText("Not connected " + QString::number(socketError));
}
 
void MainWindow::on_connected()
{
    ui->label->setText("It's ok. Connected");
    mysocket->disconnectFromHost();
}

void MainWindow::on_pushButton_clicked()
{
    ui->label->setText("");
    connect(mysocket,SIGNAL(connected()),this,SLOT(on_connected()));
    connect(mysocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(on_error(QAbstractSocket::SocketError)));
    mysocket->connectToHost(ui->lineEdit->text(), 80);
}

void MainWindow::on_error(QAbstractSocket::SocketError socketError)
{
    ui->label->setText("Not connected " + QString::number(socketError));
}

void MainWindow::on_connected()
{
    ui->label->setText("It's ok. Connected");
    mysocket->disconnectFromHost();
}

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[dousdou]

realy realy thx but i have a erreur:
it told me:
QAbstractSocket::SocketError ==> is not a type name
what i sould do it ?

[unit]

Xm, try qthelp://com.trolltech.qt.472/qdoc/qabstractsocket.html

QAbstractSocket::SocketError is not a registered metatype, so for queued connections, you will have to register it with Q_DECLARE_METATYPE() and qRegisterMetaType().

And QT demo example qthelp://com.trolltech.qt.472/qdoc/network-fortuneclient.html

[dousdou]

he told me now:
error: ‘myscoket’ was not declared in this scope

so what i should do ?

[unit]

Do you try attach that i do for you?

mysocket is pointer to QTcpSocket class

[dousdou]

this time i just like when we push the button he will go to fichier .txt and get the @ ip ligne by ligne and it will do the test
i'm realy amateur in prog so plz help me

void MainWindow::on_pushButton_clicked()
{
 
 
    QFile fichier("/home/dousdou/idee.txt");
    fichier.open(QIODevice::ReadOnly);
    QString contenu = fichier.readAll();
    fichier.close();
 
 
 
 
    connect(mysocket,SIGNAL(connected()),this,SLOT(on_connected()));
    connect(mysocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(on_error(QAbstractSocket::SocketError)));
    mysocket->connectToHost(contenu, 22);
    if (mysocket->waitForConnected(1000))
         qDebug("Connected!");
 
};

void MainWindow::on_pushButton_clicked()
{


    QFile fichier("/home/dousdou/idee.txt");
    fichier.open(QIODevice::ReadOnly);
    QString contenu = fichier.readAll();
    fichier.close();




    connect(mysocket,SIGNAL(connected()),this,SLOT(on_connected()));
    connect(mysocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(on_error(QAbstractSocket::SocketError)));
    mysocket->connectToHost(contenu, 22);
    if (mysocket->waitForConnected(1000))
         qDebug("Connected!");

};

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but it doesn't work so where is the prb ?

[unit]

Show /home/dousdou/idee.txt file or attach it, plz

[dousdou]

it's a file text