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/****************************************************************************
**
** Copyright (C) 2013 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 QWebChannel module on Qt labs.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QWEBSOCKET_H
#define QWEBSOCKET_H
#include <QObject>
#include <QHostAddress>
class QTcpServer;
class QTcpSocket;
class QWebSocketServer : public QObject
{
Q_OBJECT
public:
explicit QWebSocketServer(QObject* parent = 0);
virtual ~QWebSocketServer();
bool listen(const QHostAddress& address = QHostAddress::LocalHost, quint16 port = 0);
void close();
QHostAddress address() const;
quint16 port() const;
QString errorString() const;
signals:
void opened();
void error(QAbstractSocket::SocketError);
void textDataReceived(const QString& data);
void binaryDataReceived(const QByteArray& data);
void pongReceived();
public slots:
void sendMessage(const QByteArray& message) const;
void ping() const;
private slots:
void newConnection();
void readSocketData();
void disconnected();
protected:
struct HeaderData
{
HeaderData()
: hasVersion(false)
, hasUpgrade(false)
, hasConnection(false)
, wasUpgraded(false)
{
}
QByteArray path;
QByteArray host;
QByteArray origin;
QByteArray key;
QByteArray protocol;
QVector<QByteArray> otherHeaders;
// no bitmap here - we only have few of these objects
bool hasVersion;
bool hasUpgrade;
bool hasConnection;
bool wasUpgraded;
};
virtual bool isValid(const HeaderData& connection);
private:
struct Frame
{
enum State {
ReadStart,
ReadExtendedPayload,
ReadExtendedLongPayload,
ReadMask,
ReadData,
Finished
};
enum Opcode {
ContinuationFrame = 0x0,
TextFrame = 0x1,
BinaryFrame = 0x2,
ConnectionClose = 0x8,
Ping = 0x9,
Pong = 0xA
};
// no bitmap here - we only have a few of these objects
State state;
Opcode opcode;
bool fin;
bool masked;
///NOTE: standard says unsigned 64bit integer but QByteArray only supports 'int' size
int length;
char mask[4];
QByteArray data;
// fragmentation support
Opcode initialOpcode;
QByteArray fragments;
};
struct Connection
{
HeaderData header;
Frame currentFrame;
};
void readHeaderData(QTcpSocket* socket, HeaderData& header);
void close(QTcpSocket* socket, const HeaderData& header);
void upgrade(QTcpSocket* socket, HeaderData& header);
bool readFrameData(QTcpSocket* socket, Frame& frame);
void handleFrame(QTcpSocket* socket, Frame& frame);
void sendFrame(Frame::Opcode opcode, const QByteArray& data) const;
void sendFrame(QTcpSocket* socket, Frame::Opcode opcode, const QByteArray& data) const;
QByteArray frameHeader(Frame::Opcode opcode, const int dataSize) const;
QTcpServer* m_server;
QHash<QTcpSocket*, Connection> m_connections;
};
#endif // QWEBSOCKET_H
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