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<h1 class="title">server.cpp Example File</h1>
<span class="subtitle">fortuneserver/server.cpp</span>
<!-- $$$fortuneserver/server.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include <QtWidgets></span>
<span class="preprocessor">#include <QtNetwork></span>
<span class="preprocessor">#include <stdlib.h></span>
<span class="preprocessor">#include "server.h"</span>
Server<span class="operator">::</span>Server(<span class="type">QWidget</span> <span class="operator">*</span>parent)
: <span class="type">QDialog</span>(parent)
<span class="operator">,</span> statusLabel(<span class="keyword">new</span> <span class="type">QLabel</span>)
<span class="operator">,</span> tcpServer(Q_NULLPTR)
<span class="operator">,</span> networkSession(<span class="number">0</span>)
{
setWindowFlags(windowFlags() <span class="operator">&</span> <span class="operator">~</span><span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>WindowContextHelpButtonHint);
statusLabel<span class="operator">-</span><span class="operator">></span>setTextInteractionFlags(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>TextBrowserInteraction);
<span class="type"><a href="qnetworkconfigurationmanager.html">QNetworkConfigurationManager</a></span> manager;
<span class="keyword">if</span> (manager<span class="operator">.</span>capabilities() <span class="operator">&</span> <span class="type"><a href="qnetworkconfigurationmanager.html">QNetworkConfigurationManager</a></span><span class="operator">::</span>NetworkSessionRequired) {
<span class="comment">// Get saved network configuration</span>
<span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span><span class="operator">::</span>UserScope<span class="operator">,</span> QLatin1String(<span class="string">"QtProject"</span>));
settings<span class="operator">.</span>beginGroup(QLatin1String(<span class="string">"QtNetwork"</span>));
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> id <span class="operator">=</span> settings<span class="operator">.</span>value(QLatin1String(<span class="string">"DefaultNetworkConfiguration"</span>))<span class="operator">.</span>toString();
settings<span class="operator">.</span>endGroup();
<span class="comment">// If the saved network configuration is not currently discovered use the system default</span>
<span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span> config <span class="operator">=</span> manager<span class="operator">.</span>configurationFromIdentifier(id);
<span class="keyword">if</span> ((config<span class="operator">.</span>state() <span class="operator">&</span> <span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span><span class="operator">::</span>Discovered) <span class="operator">!</span><span class="operator">=</span>
<span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span><span class="operator">::</span>Discovered) {
config <span class="operator">=</span> manager<span class="operator">.</span>defaultConfiguration();
}
networkSession <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qnetworksession.html">QNetworkSession</a></span>(config<span class="operator">,</span> <span class="keyword">this</span>);
connect(networkSession<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qnetworksession.html">QNetworkSession</a></span><span class="operator">::</span>opened<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Server<span class="operator">::</span>sessionOpened);
statusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Opening network session."</span>));
networkSession<span class="operator">-</span><span class="operator">></span>open();
} <span class="keyword">else</span> {
sessionOpened();
}
fortunes <span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"You've been leading a dog's life. Stay off the furniture."</span>)
<span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"You've got to think about tomorrow."</span>)
<span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"You will be surprised by a loud noise."</span>)
<span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"You will feel hungry again in another hour."</span>)
<span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"You might have mail."</span>)
<span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"You cannot kill time without injuring eternity."</span>)
<span class="operator"><</span><span class="operator"><</span> tr(<span class="string">"Computers are not intelligent. They only think they are."</span>);
<span class="type">QPushButton</span> <span class="operator">*</span>quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"Quit"</span>));
quitButton<span class="operator">-</span><span class="operator">></span>setAutoDefault(<span class="keyword">false</span>);
connect(quitButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QAbstractButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span><span class="type">QWidget</span><span class="operator">::</span>close);
connect(tcpServer<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qtcpserver.html">QTcpServer</a></span><span class="operator">::</span>newConnection<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Server<span class="operator">::</span>sendFortune);
<span class="type">QHBoxLayout</span> <span class="operator">*</span>buttonLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>;
buttonLayout<span class="operator">-</span><span class="operator">></span>addStretch(<span class="number">1</span>);
buttonLayout<span class="operator">-</span><span class="operator">></span>addWidget(quitButton);
buttonLayout<span class="operator">-</span><span class="operator">></span>addStretch(<span class="number">1</span>);
<span class="type">QVBoxLayout</span> <span class="operator">*</span>mainLayout <span class="operator">=</span> Q_NULLPTR;
<span class="keyword">if</span> (<span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>styleHints()<span class="operator">-</span><span class="operator">></span>showIsFullScreen() <span class="operator">|</span><span class="operator">|</span> <span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>styleHints()<span class="operator">-</span><span class="operator">></span>showIsMaximized()) {
<span class="type">QVBoxLayout</span> <span class="operator">*</span>outerVerticalLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>(<span class="keyword">this</span>);
outerVerticalLayout<span class="operator">-</span><span class="operator">></span>addItem(<span class="keyword">new</span> <span class="type">QSpacerItem</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Ignored<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>MinimumExpanding));
<span class="type">QHBoxLayout</span> <span class="operator">*</span>outerHorizontalLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>;
outerHorizontalLayout<span class="operator">-</span><span class="operator">></span>addItem(<span class="keyword">new</span> <span class="type">QSpacerItem</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>MinimumExpanding<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Ignored));
<span class="type">QGroupBox</span> <span class="operator">*</span>groupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QGroupBox</span>(<span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>applicationDisplayName());
mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>(groupBox);
outerHorizontalLayout<span class="operator">-</span><span class="operator">></span>addWidget(groupBox);
outerHorizontalLayout<span class="operator">-</span><span class="operator">></span>addItem(<span class="keyword">new</span> <span class="type">QSpacerItem</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>MinimumExpanding<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Ignored));
outerVerticalLayout<span class="operator">-</span><span class="operator">></span>addLayout(outerHorizontalLayout);
outerVerticalLayout<span class="operator">-</span><span class="operator">></span>addItem(<span class="keyword">new</span> <span class="type">QSpacerItem</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Ignored<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>MinimumExpanding));
} <span class="keyword">else</span> {
mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>(<span class="keyword">this</span>);
}
mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(statusLabel);
mainLayout<span class="operator">-</span><span class="operator">></span>addLayout(buttonLayout);
setWindowTitle(<span class="type"><a href="../qtgui/qguiapplication.html">QGuiApplication</a></span><span class="operator">::</span>applicationDisplayName());
}
<span class="type">void</span> Server<span class="operator">::</span>sessionOpened()
{
<span class="comment">// Save the used configuration</span>
<span class="keyword">if</span> (networkSession) {
<span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span> config <span class="operator">=</span> networkSession<span class="operator">-</span><span class="operator">></span>configuration();
<span class="type"><a href="../qtcore/qstring.html">QString</a></span> id;
<span class="keyword">if</span> (config<span class="operator">.</span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span><span class="operator">::</span>UserChoice)
id <span class="operator">=</span> networkSession<span class="operator">-</span><span class="operator">></span>sessionProperty(QLatin1String(<span class="string">"UserChoiceConfiguration"</span>))<span class="operator">.</span>toString();
<span class="keyword">else</span>
id <span class="operator">=</span> config<span class="operator">.</span>identifier();
<span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span><span class="operator">::</span>UserScope<span class="operator">,</span> QLatin1String(<span class="string">"QtProject"</span>));
settings<span class="operator">.</span>beginGroup(QLatin1String(<span class="string">"QtNetwork"</span>));
settings<span class="operator">.</span>setValue(QLatin1String(<span class="string">"DefaultNetworkConfiguration"</span>)<span class="operator">,</span> id);
settings<span class="operator">.</span>endGroup();
}
tcpServer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtcpserver.html">QTcpServer</a></span>(<span class="keyword">this</span>);
<span class="keyword">if</span> (<span class="operator">!</span>tcpServer<span class="operator">-</span><span class="operator">></span>listen()) {
<span class="type">QMessageBox</span><span class="operator">::</span>critical(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Fortune Server"</span>)<span class="operator">,</span>
tr(<span class="string">"Unable to start the server: %1."</span>)
<span class="operator">.</span>arg(tcpServer<span class="operator">-</span><span class="operator">></span>errorString()));
close();
<span class="keyword">return</span>;
}
<span class="type"><a href="../qtcore/qstring.html">QString</a></span> ipAddress;
<span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">></span> ipAddressesList <span class="operator">=</span> <span class="type"><a href="qnetworkinterface.html">QNetworkInterface</a></span><span class="operator">::</span>allAddresses();
<span class="comment">// use the first non-localhost IPv4 address</span>
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> ipAddressesList<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">if</span> (ipAddressesList<span class="operator">.</span>at(i) <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>LocalHost <span class="operator">&</span><span class="operator">&</span>
ipAddressesList<span class="operator">.</span>at(i)<span class="operator">.</span>toIPv4Address()) {
ipAddress <span class="operator">=</span> ipAddressesList<span class="operator">.</span>at(i)<span class="operator">.</span>toString();
<span class="keyword">break</span>;
}
}
<span class="comment">// if we did not find one, use IPv4 localhost</span>
<span class="keyword">if</span> (ipAddress<span class="operator">.</span>isEmpty())
ipAddress <span class="operator">=</span> <span class="type"><a href="qhostaddress.html">QHostAddress</a></span>(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>LocalHost)<span class="operator">.</span>toString();
statusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"The server is running on\n\nIP: %1\nport: %2\n\n"</span>
<span class="string">"Run the Fortune Client example now."</span>)
<span class="operator">.</span>arg(ipAddress)<span class="operator">.</span>arg(tcpServer<span class="operator">-</span><span class="operator">></span>serverPort()));
}
<span class="type">void</span> Server<span class="operator">::</span>sendFortune()
{
<span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> block;
<span class="type"><a href="../qtcore/qdatastream.html">QDataStream</a></span> out(<span class="operator">&</span>block<span class="operator">,</span> <span class="type"><a href="../qtcore/qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly);
out<span class="operator">.</span>setVersion(<span class="type"><a href="../qtcore/qdatastream.html">QDataStream</a></span><span class="operator">::</span>Qt_4_0);
out <span class="operator"><</span><span class="operator"><</span> fortunes<span class="operator">.</span>at(qrand() <span class="operator">%</span> fortunes<span class="operator">.</span>size());
<span class="type"><a href="qtcpsocket.html">QTcpSocket</a></span> <span class="operator">*</span>clientConnection <span class="operator">=</span> tcpServer<span class="operator">-</span><span class="operator">></span>nextPendingConnection();
connect(clientConnection<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>disconnected<span class="operator">,</span>
clientConnection<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>deleteLater);
clientConnection<span class="operator">-</span><span class="operator">></span>write(block);
clientConnection<span class="operator">-</span><span class="operator">></span>disconnectFromHost();
}
</pre>
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<!-- @@@fortuneserver/server.cpp -->
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