<?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>client.cpp Example File | Qt Network 5.12.2</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="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-network-chat-example.html">Network Chat Example</a></td><td >client.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtnetwork-index.html">Qt 5.12.2 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">client.cpp Example File</h1> <span class="subtitle">network-chat/client.cpp</span> <!-- $$$network-chat/client.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 <QtNetwork></span> <span class="preprocessor">#include "client.h"</span> <span class="preprocessor">#include "connection.h"</span> <span class="preprocessor">#include "peermanager.h"</span> Client<span class="operator">::</span>Client() { peerManager <span class="operator">=</span> <span class="keyword">new</span> PeerManager(<span class="keyword">this</span>); peerManager<span class="operator">-</span><span class="operator">></span>setServerPort(server<span class="operator">.</span>serverPort()); peerManager<span class="operator">-</span><span class="operator">></span>startBroadcasting(); <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(peerManager<span class="operator">,</span> SIGNAL(newConnection(Connection<span class="operator">*</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(newConnection(Connection<span class="operator">*</span>))); <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(<span class="operator">&</span>server<span class="operator">,</span> SIGNAL(newConnection(Connection<span class="operator">*</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(newConnection(Connection<span class="operator">*</span>))); } <span class="type">void</span> Client<span class="operator">::</span>sendMessage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>message) { <span class="keyword">if</span> (message<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span>Connection <span class="operator">*</span><span class="operator">></span> connections <span class="operator">=</span> peers<span class="operator">.</span>values(); foreach (Connection <span class="operator">*</span>connection<span class="operator">,</span> connections) connection<span class="operator">-</span><span class="operator">></span>sendMessage(message); } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> Client<span class="operator">::</span>nickName() <span class="keyword">const</span> { <span class="keyword">return</span> peerManager<span class="operator">-</span><span class="operator">></span>userName() <span class="operator">+</span> <span class="char">'@'</span> <span class="operator">+</span> <span class="type"><a href="qhostinfo.html">QHostInfo</a></span><span class="operator">::</span>localHostName() <span class="operator">+</span> <span class="char">':'</span> <span class="operator">+</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>number(server<span class="operator">.</span>serverPort()); } bool Client<span class="operator">::</span>hasConnection(<span class="keyword">const</span> <span class="type"><a href="qhostaddress.html">QHostAddress</a></span> <span class="operator">&</span>senderIp<span class="operator">,</span> <span class="type">int</span> senderPort) <span class="keyword">const</span> { <span class="keyword">if</span> (senderPort <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) <span class="keyword">return</span> peers<span class="operator">.</span>contains(senderIp); <span class="keyword">if</span> (<span class="operator">!</span>peers<span class="operator">.</span>contains(senderIp)) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span>Connection <span class="operator">*</span><span class="operator">></span> connections <span class="operator">=</span> peers<span class="operator">.</span>values(senderIp); foreach (Connection <span class="operator">*</span>connection<span class="operator">,</span> connections) { <span class="keyword">if</span> (connection<span class="operator">-</span><span class="operator">></span>peerPort() <span class="operator">=</span><span class="operator">=</span> senderPort) <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="keyword">return</span> <span class="keyword">false</span>; } <span class="type">void</span> Client<span class="operator">::</span>newConnection(Connection <span class="operator">*</span>connection) { connection<span class="operator">-</span><span class="operator">></span>setGreetingMessage(peerManager<span class="operator">-</span><span class="operator">></span>userName()); connect(connection<span class="operator">,</span> SIGNAL(error(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(connectionError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))); connect(connection<span class="operator">,</span> SIGNAL(disconnected())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(disconnected())); connect(connection<span class="operator">,</span> SIGNAL(readyForUse())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(readyForUse())); } <span class="type">void</span> Client<span class="operator">::</span>readyForUse() { Connection <span class="operator">*</span>connection <span class="operator">=</span> qobject_cast<span class="operator"><</span>Connection <span class="operator">*</span><span class="operator">></span>(sender()); <span class="keyword">if</span> (<span class="operator">!</span>connection <span class="operator">|</span><span class="operator">|</span> hasConnection(connection<span class="operator">-</span><span class="operator">></span>peerAddress()<span class="operator">,</span> connection<span class="operator">-</span><span class="operator">></span>peerPort())) <span class="keyword">return</span>; connect(connection<span class="operator">,</span> SIGNAL(newMessage(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SIGNAL(newMessage(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="../qtcore/qstring.html">QString</a></span>))); peers<span class="operator">.</span>insert(connection<span class="operator">-</span><span class="operator">></span>peerAddress()<span class="operator">,</span> connection); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> nick <span class="operator">=</span> connection<span class="operator">-</span><span class="operator">></span>name(); <span class="keyword">if</span> (<span class="operator">!</span>nick<span class="operator">.</span>isEmpty()) <span class="keyword">emit</span> newParticipant(nick); } <span class="type">void</span> Client<span class="operator">::</span>disconnected() { <span class="keyword">if</span> (Connection <span class="operator">*</span>connection <span class="operator">=</span> qobject_cast<span class="operator"><</span>Connection <span class="operator">*</span><span class="operator">></span>(sender())) removeConnection(connection); } <span class="type">void</span> Client<span class="operator">::</span>connectionError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError <span class="comment">/* socketError */</span>) { <span class="keyword">if</span> (Connection <span class="operator">*</span>connection <span class="operator">=</span> qobject_cast<span class="operator"><</span>Connection <span class="operator">*</span><span class="operator">></span>(sender())) removeConnection(connection); } <span class="type">void</span> Client<span class="operator">::</span>removeConnection(Connection <span class="operator">*</span>connection) { <span class="keyword">if</span> (peers<span class="operator">.</span>contains(connection<span class="operator">-</span><span class="operator">></span>peerAddress())) { peers<span class="operator">.</span>remove(connection<span class="operator">-</span><span class="operator">></span>peerAddress()); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> nick <span class="operator">=</span> connection<span class="operator">-</span><span class="operator">></span>name(); <span class="keyword">if</span> (<span class="operator">!</span>nick<span class="operator">.</span>isEmpty()) <span class="keyword">emit</span> participantLeft(nick); } connection<span class="operator">-</span><span class="operator">></span>deleteLater(); } </pre> </div> <!-- @@@network-chat/client.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> 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.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>