<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Qt 4.8: server.cpp Example File (network/fortuneserver/server.cpp)</title> <link rel="stylesheet" type="text/css" href="style/style.css" /> <script src="scripts/jquery.js" type="text/javascript"></script> <script src="scripts/functions.js" type="text/javascript"></script> <link rel="stylesheet" type="text/css" href="style/superfish.css" /> <link rel="stylesheet" type="text/css" href="style/narrow.css" /> <!--[if IE]> <meta name="MSSmartTagsPreventParsing" content="true"> <meta http-equiv="imagetoolbar" content="no"> <![endif]--> <!--[if lt IE 7]> <link rel="stylesheet" type="text/css" href="style/style_ie6.css"> <![endif]--> <!--[if IE 7]> <link rel="stylesheet" type="text/css" href="style/style_ie7.css"> <![endif]--> <!--[if IE 8]> <link rel="stylesheet" type="text/css" href="style/style_ie8.css"> <![endif]--> <script src="scripts/superfish.js" type="text/javascript"></script> <script src="scripts/narrow.js" type="text/javascript"></script> </head> <body class="" onload="CheckEmptyAndLoadList();"> <div class="header" id="qtdocheader"> <div class="content"> <div id="nav-logo"> <a href="index.html">Home</a></div> <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a> <div id="narrowsearch"></div> <div id="nav-topright"> <ul> <li class="nav-topright-home"><a href="http://qt.digia.com/">Qt HOME</a></li> <li class="nav-topright-dev"><a href="http://qt-project.org/">DEV</a></li> <li class="nav-topright-doc nav-topright-doc-active"><a href="http://qt-project.org/doc/"> DOC</a></li> <li class="nav-topright-blog"><a href="http://blog.qt.digia.com/">BLOG</a></li> </ul> </div> <div id="shortCut"> <ul> <li class="shortCut-topleft-inactive"><span><a href="index.html">Qt 4.8</a></span></li> <li class="shortCut-topleft-active"><a href="http://qt-project.org/doc/">ALL VERSIONS </a></li> </ul> </div> <ul class="sf-menu" id="narrowmenu"> <li><a href="#">API Lookup</a> <ul> <li><a href="classes.html">Class index</a></li> <li><a href="functions.html">Function index</a></li> <li><a href="modules.html">Modules</a></li> <li><a href="namespaces.html">Namespaces</a></li> <li><a href="qtglobal.html">Global Declarations</a></li> <li><a href="qdeclarativeelements.html">QML elements</a></li> </ul> </li> <li><a href="#">Qt Topics</a> <ul> <li><a href="qt-basic-concepts.html">Programming with Qt</a></li> <li><a href="qtquick.html">Device UIs & Qt Quick</a></li> <li><a href="qt-gui-concepts.html">UI Design with Qt</a></li> <li><a href="supported-platforms.html">Supported Platforms</a></li> <li><a href="technology-apis.html">Qt and Key Technologies</a></li> <li><a href="best-practices.html">How-To's and Best Practices</a></li> </ul> </li> <li><a href="#">Examples</a> <ul> <li><a href="all-examples.html">Examples</a></li> <li><a href="tutorials.html">Tutorials</a></li> <li><a href="demos.html">Demos</a></li> <li><a href="qdeclarativeexamples.html">QML Examples</a></li> </ul> </li> </ul> </div> </div> <div class="wrapper"> <div class="hd"> <span></span> </div> <div class="bd group"> <div class="sidebar"> <div class="searchlabel"> Search index:</div> <div class="search" id="sidebarsearch"> <form id="qtdocsearch" action="" onsubmit="return false;"> <fieldset> <input type="text" name="searchstring" id="pageType" value="" /> <div id="resultdialog"> <a href="#" id="resultclose">Close</a> <p id="resultlinks" class="all"><a href="#" id="showallresults">All</a> | <a href="#" id="showapiresults">API</a> | <a href="#" id="showarticleresults">Articles</a> | <a href="#" id="showexampleresults">Examples</a></p> <p id="searchcount" class="all"><span id="resultcount"></span><span id="apicount"></span><span id="articlecount"></span><span id="examplecount"></span> results:</p> <ul id="resultlist" class="all"> </ul> </div> </fieldset> </form> </div> <div class="box first bottombar" id="lookup"> <h2 title="API Lookup"><span></span> API Lookup</h2> <div id="list001" class="list"> <ul id="ul001" > <li class="defaultLink"><a href="classes.html">Class index</a></li> <li class="defaultLink"><a href="functions.html">Function index</a></li> <li class="defaultLink"><a href="modules.html">Modules</a></li> <li class="defaultLink"><a href="namespaces.html">Namespaces</a></li> <li class="defaultLink"><a href="qtglobal.html">Global Declarations</a></li> <li class="defaultLink"><a href="qdeclarativeelements.html">QML elements</a></li> </ul> </div> </div> <div class="box bottombar" id="topics"> <h2 title="Qt Topics"><span></span> Qt Topics</h2> <div id="list002" class="list"> <ul id="ul002" > <li class="defaultLink"><a href="qt-basic-concepts.html">Programming with Qt</a></li> <li class="defaultLink"><a href="qtquick.html">Device UIs & Qt Quick</a></li> <li class="defaultLink"><a href="qt-gui-concepts.html">UI Design with Qt</a></li> <li class="defaultLink"><a href="supported-platforms.html">Supported Platforms</a></li> <li class="defaultLink"><a href="technology-apis.html">Qt and Key Technologies</a></li> <li class="defaultLink"><a href="best-practices.html">How-To's and Best Practices</a></li> </ul> </div> </div> <div class="box" id="examples"> <h2 title="Examples"><span></span> Examples</h2> <div id="list003" class="list"> <ul id="ul003"> <li class="defaultLink"><a href="all-examples.html">Examples</a></li> <li class="defaultLink"><a href="tutorials.html">Tutorials</a></li> <li class="defaultLink"><a href="demos.html">Demos</a></li> <li class="defaultLink"><a href="qdeclarativeexamples.html">QML Examples</a></li> </ul> </div> </div> </div> <div class="wrap"> <div class="toolbar"> <div class="breadcrumb toolblock"> <ul> <li class="first"><a href="index.html">Home</a></li> <!-- Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">server.cpp Example File</h1> <span class="small-subtitle">network/fortuneserver/server.cpp</span> <!-- $$$network/fortuneserver/server.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 Digia Plc and its Subsidiary(-ies) 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 <QtGui></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"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)<span class="operator">,</span> tcpServer(<span class="number">0</span>)<span class="operator">,</span> networkSession(<span class="number">0</span>) { statusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>; quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"Quit"</span>)); quitButton<span class="operator">-</span><span class="operator">></span>setAutoDefault(<span class="keyword">false</span>); <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="qsettings.html">QSettings</a></span> settings(<span class="type"><a href="qsettings.html">QSettings</a></span><span class="operator">::</span>UserScope<span class="operator">,</span> QLatin1String(<span class="string">"Trolltech"</span>)); settings<span class="operator">.</span>beginGroup(QLatin1String(<span class="string">"QtNetwork"</span>)); <span class="keyword">const</span> <span class="type"><a href="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> SIGNAL(opened())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(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>); connect(quitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close())); connect(tcpServer<span class="operator">,</span> SIGNAL(newConnection())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(sendFortune())); <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>buttonLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></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"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>; mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(statusLabel); mainLayout<span class="operator">-</span><span class="operator">></span>addLayout(buttonLayout); setLayout(mainLayout); setWindowTitle(tr(<span class="string">"Fortune Server"</span>)); } <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="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="qsettings.html">QSettings</a></span> settings(<span class="type"><a href="qsettings.html">QSettings</a></span><span class="operator">::</span>UserScope<span class="operator">,</span> QLatin1String(<span class="string">"Trolltech"</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"><a href="qmessagebox.html">QMessageBox</a></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="qstring.html">QString</a></span> ipAddress; <span class="type"><a href="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="qbytearray.html">QByteArray</a></span> block; <span class="type"><a href="qdatastream.html">QDataStream</a></span> out(<span class="operator">&</span>block<span class="operator">,</span> <span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly); out<span class="operator">.</span>setVersion(<span class="type"><a href="qdatastream.html">QDataStream</a></span><span class="operator">::</span>Qt_4_0); out <span class="operator"><</span><span class="operator"><</span> (<span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span>)<span class="number">0</span>; 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()); out<span class="operator">.</span>device()<span class="operator">-</span><span class="operator">></span>seek(<span class="number">0</span>); out <span class="operator"><</span><span class="operator"><</span> (<span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span>)(block<span class="operator">.</span>size() <span class="operator">-</span> <span class="keyword">sizeof</span>(<span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span>)); <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> SIGNAL(disconnected())<span class="operator">,</span> clientConnection<span class="operator">,</span> SLOT(deleteLater())); clientConnection<span class="operator">-</span><span class="operator">></span>write(block); clientConnection<span class="operator">-</span><span class="operator">></span>disconnectFromHost(); }</pre> </div> <!-- @@@network/fortuneserver/server.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>