Add initial support for a declarative WebSocketServer.

It comes with basic support for setting up a non-secure server
listening on an arbitrary host and port. The name can be set,
and whether the server should be listening or accept connections.
The error string is also available via a property.

When a client connects, a clientConnected(QQmlWebSocket*) signal is
emitted.

To showcase the usage and functionality, a new qmlwebsocketserver
example is added which behaves similar to qmlwebsocketclient. It
simply sends messages from a WebSocket to a local WebSocketServer
which in turn sends a simple response.

Change-Id: Ib6318155ed08cbeea47d820b709764d2e36dcc45
Reviewed-by: Kurt Pattyn <pattyn.kurt@gmail.com>

6 files changed, 216 insertions, 1 deletions

diff --git a/examples/websockets/doc/qmlwebsocketserver.qdoc b/examples/websockets/doc/qmlwebsocketserver.qdoc
new file mode 100644
index 0000000..99f70b6
--- /dev/null
+++ b/examples/websockets/doc/qmlwebsocketserver.qdoc
@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** 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 QtWebSocket module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example qmlwebsocketserver
+    \title QML WebSocket Server Example
+    \ingroup qtwebsockets-examples
+    \brief A simple example that shows how to use a QML WebSocketServer.
+*/
diff --git a/examples/websockets/qmlwebsocketserver/data.qrc b/examples/websockets/qmlwebsocketserver/data.qrc
new file mode 100644
index 0000000..e703d32
--- /dev/null
+++ b/examples/websockets/qmlwebsocketserver/data.qrc
@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>qml/qmlwebsocketserver/main.qml</file>
+    </qresource>
+</RCC>
diff --git a/examples/websockets/qmlwebsocketserver/main.cpp b/examples/websockets/qmlwebsocketserver/main.cpp
new file mode 100644
index 0000000..fc107be
--- /dev/null
+++ b/examples/websockets/qmlwebsocketserver/main.cpp
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** 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 QtWebSocket module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/QGuiApplication>
+#include <QQuickView>
+
+int main(int argc, char *argv[])
+{
+    QGuiApplication app(argc, argv);
+
+    QQuickView view;
+    view.setSource(QUrl(QStringLiteral("qrc:/qml/qmlwebsocketserver/main.qml")));
+    view.show();
+
+    return app.exec();
+}
diff --git a/examples/websockets/qmlwebsocketserver/qml/qmlwebsocketserver/main.qml b/examples/websockets/qmlwebsocketserver/qml/qmlwebsocketserver/main.qml
new file mode 100644
index 0000000..03446c4
--- /dev/null
+++ b/examples/websockets/qmlwebsocketserver/qml/qmlwebsocketserver/main.qml
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** 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 QtWebSocket module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+import Qt.WebSockets 1.0
+
+Rectangle {
+    width: 360
+    height: 360
+
+    function appendMessage(message) {
+        messageBox.text += "\n" + message
+    }
+
+    WebSocketServer {
+        id: server
+        listen: true
+        onClientConnected: {
+            webSocket.onTextMessageReceived.connect(function(message) {
+                appendMessage(qsTr("Server received message: %1").arg(message));
+                webSocket.sendTextMessage(qsTr("Hello Client!"));
+            });
+        }
+        onErrorStringChanged: {
+            appendMessage(qsTr("Server error: %1").arg(errorString));
+        }
+    }
+
+    WebSocket {
+        id: socket
+        url: server.url
+        onTextMessageReceived: appendMessage(qsTr("Client received message: %1").arg(message))
+        onStatusChanged: {
+            if (socket.status == WebSocket.Error) {
+                appendMessage(qsTr("Client error: %1").arg(socket.errorString));
+            } else if (socket.status == WebSocket.Closed) {
+                appendMessage(qsTr("Client socket closed."));
+            }
+        }
+    }
+
+    Text {
+        id: messageBox
+        text: qsTr("Click to send a message!")
+        anchors.fill: parent
+
+        MouseArea {
+            anchors.fill: parent
+            onClicked: {
+                socket.sendTextMessage(qsTr("Hello Server!"));
+            }
+        }
+    }
+}
diff --git a/examples/websockets/qmlwebsocketserver/qmlwebsocketserver.pro b/examples/websockets/qmlwebsocketserver/qmlwebsocketserver.pro
new file mode 100644
index 0000000..a499c7e
--- /dev/null
+++ b/examples/websockets/qmlwebsocketserver/qmlwebsocketserver.pro
@@ -0,0 +1,13 @@
+QT += core qml quick websockets
+
+TARGET = qmlwebsocketserver
+
+TEMPLATE = app
+
+CONFIG   -= app_bundle
+
+SOURCES += main.cpp
+
+RESOURCES += data.qrc
+
+OTHER_FILES += qml/qmlwebsocketserver/main.qml
diff --git a/examples/websockets/websockets.pro b/examples/websockets/websockets.pro
index 76a0e9f..e5eddf6 100644
--- a/examples/websockets/websockets.pro
+++ b/examples/websockets/websockets.pro
@@ -3,7 +3,11 @@ TEMPLATE = subdirs
 SUBDIRS = echoclient \
           echoserver \
           simplechat
-qtHaveModule(quick): SUBDIRS += qmlwebsocketclient
+
+qtHaveModule(quick) {
+SUBDIRS += qmlwebsocketclient \
+           qmlwebsocketserver
+}
 
 contains(QT_CONFIG, openssl) | contains(QT_CONFIG, openssl-linked) {
 SUBDIRS +=  \