chatserver.cpp Example File

simplechat/chatserver.cpp
 /****************************************************************************
 **
 ** Copyright (C) 2016 Kurt Pattyn <pattyn.kurt@gmail.com>.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtWebSockets module 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."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
 #include "chatserver.h"

 #include <QtWebSockets>
 #include <QtCore>

 #include <cstdio>
 using namespace std;

 QT_USE_NAMESPACE

 static QString getIdentifier(QWebSocket *peer)
 {
     return QStringLiteral("%1:%2").arg(peer->peerAddress().toString(),
                                        QString::number(peer->peerPort()));
 }

 ChatServer::ChatServer(quint16 port, QObject *parent) :
     QObject(parent),
     m_pWebSocketServer(new QWebSocketServer(QStringLiteral("Chat Server"),
                                             QWebSocketServer::NonSecureMode,
                                             this))
 {
     if (m_pWebSocketServer->listen(QHostAddress::Any, port))
     {
         QTextStream(stdout) << "Chat Server listening on port " << port << '\n';
         connect(m_pWebSocketServer, &QWebSocketServer::newConnection,
                 this, &ChatServer::onNewConnection);
     }
 }

 ChatServer::~ChatServer()
 {
     m_pWebSocketServer->close();
 }

 void ChatServer::onNewConnection()
 {
     auto pSocket = m_pWebSocketServer->nextPendingConnection();
     QTextStream(stdout) << getIdentifier(pSocket) << " connected!\n";
     pSocket->setParent(this);

     connect(pSocket, &QWebSocket::textMessageReceived,
             this, &ChatServer::processMessage);
     connect(pSocket, &QWebSocket::disconnected,
             this, &ChatServer::socketDisconnected);

     m_clients << pSocket;
 }

 void ChatServer::processMessage(const QString &message)
 {
     QWebSocket *pSender = qobject_cast<QWebSocket *>(sender());
     for (QWebSocket *pClient : qAsConst(m_clients)) {
         if (pClient != pSender) //don't echo message back to sender
             pClient->sendTextMessage(message);
     }
 }

 void ChatServer::socketDisconnected()
 {
     QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
     QTextStream(stdout) << getIdentifier(pClient) << " disconnected!\n";
     if (pClient)
     {
         m_clients.removeAll(pClient);
         pClient->deleteLater();
     }
 }