server.cpp Example File
^{network/fortuneserver/server.cpp}

    /****************************************************************************
    **
    ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
    **
    ** This file is part of the documentation of the Qt Toolkit.
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** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
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    #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);

        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(rand() % 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();
    }