hyperion.ng/libsrc/jsonserver/JsonClientConnection.h

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#pragma once
#include <map>
// Qt includes
#include <QByteArray>
#include <QTcpSocket>
#include <QHostAddress>
#include <QString>
// Hyperion includes
#include <hyperion/Hyperion.h>
// util includes
#include <utils/Logger.h>
#include <utils/JsonProcessor.h>
/// Constants and utility functions related to WebSocket opcodes
/**
* WebSocket Opcodes are 4 bits. See RFC6455 section 5.2.
*/
namespace OPCODE {
enum value {
CONTINUATION = 0x0,
TEXT = 0x1,
BINARY = 0x2,
RSV3 = 0x3,
RSV4 = 0x4,
RSV5 = 0x5,
RSV6 = 0x6,
RSV7 = 0x7,
CLOSE = 0x8,
PING = 0x9,
PONG = 0xA,
CONTROL_RSVB = 0xB,
CONTROL_RSVC = 0xC,
CONTROL_RSVD = 0xD,
CONTROL_RSVE = 0xE,
CONTROL_RSVF = 0xF
};
/// Check if an opcode is reserved
/**
* @param v The opcode to test.
* @return Whether or not the opcode is reserved.
*/
inline bool reserved(value v) {
return (v >= RSV3 && v <= RSV7) || (v >= CONTROL_RSVB && v <= CONTROL_RSVF);
}
/// Check if an opcode is invalid
/**
* Invalid opcodes are negative or require greater than 4 bits to store.
*
* @param v The opcode to test.
* @return Whether or not the opcode is invalid.
*/
inline bool invalid(value v) {
return (v > 0xF || v < 0);
}
/// Check if an opcode is for a control frame
/**
* @param v The opcode to test.
* @return Whether or not the opcode is a control opcode.
*/
inline bool is_control(value v) {
return v >= 0x8;
}
}
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///
/// The Connection object created by \a JsonServer when a new connection is establshed
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///
class JsonClientConnection : public QObject
{
Q_OBJECT
public:
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///
/// Constructor
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/// @param socket The Socket object for this connection
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///
JsonClientConnection(QTcpSocket * socket);
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///
/// Destructor
///
~JsonClientConnection();
public slots:
void sendMessage(QJsonObject);
signals:
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///
/// Signal which is emitted when the connection is being closed
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/// @param connection This connection object
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///
void connectionClosed(JsonClientConnection * connection);
private slots:
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///
/// Slot called when new data has arrived
///
void readData();
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///
/// Slot called when this connection is being closed
///
void socketClosed();
private:
/// new instance of JsonProcessor
JsonProcessor * _jsonProcessor;
///
/// Do handshake for a websocket connection
///
void doWebSocketHandshake();
///
/// Handle incoming websocket data frame
///
void handleWebSocketFrame();
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/// The TCP-Socket that is connected tot the Json-client
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QTcpSocket * _socket;
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/// Link to Hyperion for writing led-values to a priority channel
Hyperion * _hyperion;
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/// The buffer used for reading data from the socket
QByteArray _receiveBuffer;
/// used for WebSocket detection and connection handling
bool _webSocketHandshakeDone;
/// The logger instance
Logger * _log;
/// address of client
QHostAddress _clientAddress;
// masks for fields in the basic header
static uint8_t const BHB0_OPCODE = 0x0F;
static uint8_t const BHB0_RSV3 = 0x10;
static uint8_t const BHB0_RSV2 = 0x20;
static uint8_t const BHB0_RSV1 = 0x40;
static uint8_t const BHB0_FIN = 0x80;
static uint8_t const BHB1_PAYLOAD = 0x7F;
static uint8_t const BHB1_MASK = 0x80;
static uint8_t const payload_size_code_16bit = 0x7E; // 126
static uint8_t const payload_size_code_64bit = 0x7F; // 127
};