added skeleton for the json connection server

libsrc/jsonserver/JsonClientConnection.cpp

@@ -0,0 +1,77 @@
+// stl includes
+#include <iostream>
+
+#include "JsonClientConnection.h"
+
+JsonClientConnection::JsonClientConnection(QTcpSocket *socket) :
+	QObject(),
+	_socket(socket)
+{
+	connect(_socket, SIGNAL(disconnected()), this, SLOT(socketClosed()));
+	connect(_socket, SIGNAL(readyRead()), this, SLOT(readData()));
+}
+
+
+JsonClientConnection::~JsonClientConnection()
+{
+	delete _socket;
+}
+
+void JsonClientConnection::readData()
+{
+	_receiveBuffer += _socket->readAll();
+
+	int bytes = _receiveBuffer.indexOf('\n') + 1;
+	if (bytes != 0)
+	{
+		// create message string
+		std::string message(_receiveBuffer.data(), bytes);
+
+		// remove message data from buffer
+		_receiveBuffer = _receiveBuffer.mid(bytes);
+
+		// handle message
+		handleMessage(message);
+	}
+}
+
+void JsonClientConnection::socketClosed()
+{
+	emit connectionClosed(this);
+}
+
+void JsonClientConnection::handleMessage(const std::string &message)
+{
+	Json::Reader reader;
+	Json::Value messageRoot;
+	if (!reader.parse(message, messageRoot, false))
+	{
+		sendErrorReply("Error while parsing json: " + reader.getFormattedErrorMessages());
+		return;
+	}
+
+	handleNotImplemented(messageRoot);
+}
+
+void JsonClientConnection::handleNotImplemented(const Json::Value & message)
+{
+	sendErrorReply("Command not implemented");
+}
+
+void JsonClientConnection::sendMessage(const Json::Value &message)
+{
+	Json::FastWriter writer;
+	std::string serializedReply = writer.write(message);
+	_socket->write(serializedReply.data(), serializedReply.length());
+}
+
+void JsonClientConnection::sendErrorReply(const std::string &error)
+{
+	// create reply
+	Json::Value reply;
+	reply["success"] = false;
+	reply["error"] = error;
+
+	// send reply
+	sendMessage(reply);
+}