Added some more examples

Implemented a C++ Server, providing a chatservice through a simple
QObject using QWebChannel and also both a QML and HTML Client to
interact with the server.
The examples show how to use properties, signals and methods,
separated in server and clients.

Change-Id: I20c84c2104d0bb599ead1771aad499e59657f83e
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/examples/webchannel/shared/websockettransport.cpp b/examples/webchannel/shared/websockettransport.cpp
new file mode 100644
index 0000000..266563a
--- /dev/null
+++ b/examples/webchannel/shared/websockettransport.cpp
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebChannel module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "websockettransport.h"
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QDebug>
+
+#include <QtWebSockets/QWebSocket>
+
+/*!
+    \brief QWebChannelAbstractSocket implementation that uses a QWebSocket internally.
+
+    The transport delegates all messages received over the QWebSocket over its
+    textMessageReceived signal. Analogously, all calls to sendTextMessage will
+    be send over the QWebSocket to the remote client.
+*/
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    Construct the transport object and wrap the given socket.
+
+    The socket is also set as the parent of the transport object.
+*/
+WebSocketTransport::WebSocketTransport(QWebSocket *socket)
+: QWebChannelAbstractTransport(socket)
+, m_socket(socket)
+{
+    connect(socket, &QWebSocket::textMessageReceived,
+            this, &WebSocketTransport::textMessageReceived);
+}
+
+/*!
+    Destroys the WebSocketTransport.
+*/
+WebSocketTransport::~WebSocketTransport()
+{
+
+}
+
+/*!
+    Serialize the JSON message and send it as a text message via the WebSocket to the client.
+*/
+void WebSocketTransport::sendMessage(const QJsonObject &message)
+{
+    QJsonDocument doc(message);
+    m_socket->sendTextMessage(QString::fromUtf8(doc.toJson(QJsonDocument::Compact)));
+}
+
+/*!
+    Deserialize the stringified JSON messageData and emit messageReceived.
+*/
+void WebSocketTransport::textMessageReceived(const QString &messageData)
+{
+    QJsonParseError error;
+    QJsonDocument message = QJsonDocument::fromJson(messageData.toUtf8(), &error);
+    if (error.error) {
+        qWarning() << "Failed to parse text message as JSON object:" << messageData
+                   << "Error is:" << error.errorString();
+        return;
+    } else if (!message.isObject()) {
+        qWarning() << "Received JSON message that is not an object: " << messageData;
+        return;
+    }
+    emit messageReceived(message.object(), this);
+}
+
+QT_END_NAMESPACE