Qt 4.3: server.cpp Example File (network/fortuneserver/server.cpp)

|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# server.cpp Example File
network/fortuneserver/server.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the documentation of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
    ** included in the packaging of this file.  Alternatively you may (at
    ** your option) use any later version of the GNU General Public
    ** License if such license has been publicly approved by Trolltech ASA
    ** (or its successors, if any) and the KDE Free Qt Foundation. In
    ** addition, as a special exception, Trolltech gives you certain
    ** additional rights. These rights are described in the Trolltech GPL
    ** Exception version 1.2, which can be found at
    ** http://www.trolltech.com/products/qt/gplexception/ and in the file
    ** GPL_EXCEPTION.txt in this package.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
    ** you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** In addition, as a special exception, Trolltech, as the sole
    ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
    ** Integration plug-in the right for the Qt/Eclipse Integration to
    ** link to functionality provided by Qt Designer and its related
    ** libraries.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
    ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #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();
     }