chatserver.cpp Example File | Qt WebSockets 5.9

Qt 5.9 | Qt WebSockets | Simple Chat Example | chatserver.cpp Example File

Qt 5.9.2 Reference Documentation

# 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/QWebSocketServer"
      #include "QtWebSockets/QWebSocket"
      #include <QtCore/QDebug>

      QT_USE_NAMESPACE

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

      ChatServer::~ChatServer()
      {
          m_pWebSocketServer->close();
          qDeleteAll(m_clients.begin(), m_clients.end());
      }

      void ChatServer::onNewConnection()
      {
          QWebSocket *pSocket = m_pWebSocketServer->nextPendingConnection();

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

          m_clients << pSocket;
      }

      void ChatServer::processMessage(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());
          if (pClient)
          {
              m_clients.removeAll(pClient);
              pClient->deleteLater();
          }
      }