QTcpServer based server 2 : QTcpServer « Qt « C++

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2. Qt
3. QTcpServer

QTcpServer based server 2

  



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#ifndef SERVER_H
#define SERVER_H

#include <QDialog>

QT_BEGIN_NAMESPACE
class QLabel;
class QPushButton;
class QTcpServer;
QT_END_NAMESPACE


class Server : public QDialog
{
    Q_OBJECT

public:
    Server(QWidget *parent = 0);

private slots:
    void sendFortune();

private:
    QLabel *statusLabel;
    QPushButton *quitButton;
    QTcpServer *tcpServer;
    QStringList fortunes;
};


#endif






#include <QtGui>
#include <QtNetwork>

#include <stdlib.h>

#include "server.h"

Server::Server(QWidget *parent)
    : QDialog(parent)
{
    statusLabel = new QLabel;
    quitButton = new QPushButton(tr("Quit"));
    quitButton->setAutoDefault(false);

 
    tcpServer = new QTcpServer(this);
    if (!tcpServer->listen()) {
        QMessageBox::critical(this, tr("Fortune Server"),
                              tr("Unable to start the server: %1.")
                              .arg(tcpServer->errorString()));
        close();
        return;
    }


    statusLabel->setText(tr("The server is running on port %1.\n"
                            "Run the Fortune Client example now.")
                         .arg(tcpServer->serverPort()));



    fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
             << tr("You've got to think about tomorrow.")
             << tr("You will be surprised by a loud noise.")
             << tr("You will feel hungry again in another hour.")
             << tr("You might have mail.")
             << tr("You cannot kill time without injuring eternity.")
             << tr("Computers are not intelligent. They only think they are.");


    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

    connect(tcpServer, SIGNAL(newConnection()), this, SLOT(sendFortune()));


    QHBoxLayout *buttonLayout = new QHBoxLayout;
    buttonLayout->addStretch(1);
    buttonLayout->addWidget(quitButton);
    buttonLayout->addStretch(1);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(statusLabel);
    mainLayout->addLayout(buttonLayout);
    setLayout(mainLayout);

    setWindowTitle(tr("Fortune Server"));
}


void Server::sendFortune()
{

    QByteArray block;
    QDataStream out(&block, QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_4_0);
 
    out << (quint16)0;
    out << fortunes.at(qrand() % fortunes.size());
    out.device()->seek(0);
    out << (quint16)(block.size() - sizeof(quint16));
 

    QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
    connect(clientConnection, SIGNAL(disconnected()),
            clientConnection, SLOT(deleteLater()));
 

    clientConnection->write(block);
    clientConnection->disconnectFromHost();

}







#include <QApplication>
#include <QtCore>

#include <stdlib.h>

#include "server.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Server server;
    server.show();
    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
    return server.exec();
}

   
    
  

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