<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>server.cpp Example File | Qt Core 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-ipc-localfortuneserver-example.html">Local Fortune Server Example</a></td><td >server.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtcore-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">server.cpp Example File</h1> <span class="subtitle">ipc/localfortuneserver/server.cpp</span> <!-- $$$ipc/localfortuneserver/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> <span class="preprocessor">#include <qlocalserver.h></span> <span class="preprocessor">#include <qlocalsocket.h></span> Server<span class="operator">::</span>Server(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="../qtwidgets/qdialog.html">QDialog</a></span>(parent) { setWindowFlags(windowFlags() <span class="operator">&</span> <span class="operator">~</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WindowContextHelpButtonHint); server <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtnetwork/qlocalserver.html">QLocalServer</a></span>(<span class="keyword">this</span>); <span class="keyword">if</span> (<span class="operator">!</span>server<span class="operator">-</span><span class="operator">></span>listen(<span class="string">"fortune"</span>)) { <span class="type"><a href="../qtwidgets/qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>critical(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Local Fortune Server"</span>)<span class="operator">,</span> tr(<span class="string">"Unable to start the server: %1."</span>) <span class="operator">.</span>arg(server<span class="operator">-</span><span class="operator">></span>errorString())); close(); <span class="keyword">return</span>; } <span class="type"><a href="../qtwidgets/qlabel.html">QLabel</a></span> <span class="operator">*</span>statusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qlabel.html">QLabel</a></span>; statusLabel<span class="operator">-</span><span class="operator">></span>setWordWrap(<span class="keyword">true</span>); statusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"The server is running.\n"</span> <span class="string">"Run the Local Fortune Client example now."</span>)); 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"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/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>); connect(quitButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Server<span class="operator">::</span>close); connect(server<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtnetwork/qlocalserver.html">QLocalServer</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"><a href="../qtwidgets/qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>buttonLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/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="../qtwidgets/qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qvboxlayout.html">QVBoxLayout</a></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>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_5_10); <span class="keyword">const</span> <span class="type">int</span> fortuneIndex <span class="operator">=</span> <span class="type"><a href="qrandomgenerator.html">QRandomGenerator</a></span><span class="operator">::</span>global()<span class="operator">-</span><span class="operator">></span>bounded(<span class="number">0</span><span class="operator">,</span> fortunes<span class="operator">.</span>size()); <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>message <span class="operator">=</span> fortunes<span class="operator">.</span>at(fortuneIndex); out <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qtglobal.html#quint32-typedef">quint32</a></span>(message<span class="operator">.</span>size()); out <span class="operator"><</span><span class="operator"><</span> message; <span class="type"><a href="../qtnetwork/qlocalsocket.html">QLocalSocket</a></span> <span class="operator">*</span>clientConnection <span class="operator">=</span> server<span class="operator">-</span><span class="operator">></span>nextPendingConnection(); connect(clientConnection<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtnetwork/qlocalsocket.html">QLocalSocket</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="../qtnetwork/qlocalsocket.html">QLocalSocket</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>flush(); clientConnection<span class="operator">-</span><span class="operator">></span>disconnectFromServer(); } </pre> </div> <!-- @@@ipc/localfortuneserver/server.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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