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/****************************************************************************
**
** Copyright (C) 2019 Luxoft Sweden AB
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QmlLive tool.
**
** $QT_BEGIN_LICENSE:GPL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite 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 The Qt Company. For
** licensing terms and conditions see https://www.qt.io/terms-conditions.
** For further information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
** SPDX-License-Identifier: GPL-3.0
**
****************************************************************************/
#include "ipcconnection.h"
#ifdef QMLLIVE_IPC_DEBUG
#define DEBUG qDebug()
#else
#define DEBUG if (0) qDebug()
#endif
/**
* \class IpcConnection
* \brief Handles a single connection from the IpcServer or IpcClient
* \inmodule ipc
*/
/**
* \brief Constructs a IpcConnection with \a socket and a \a parent
*/
IpcConnection::IpcConnection(QTcpSocket *socket, QObject *parent)
: QObject(parent)
, m_socket(socket)
, m_headerComplete(false)
, m_maxContentSize(1024*1024*10)
{
DEBUG << "IpcConnection()";
connect(m_socket, &QAbstractSocket::disconnected, this, &IpcConnection::close);
void (QAbstractSocket::*QAbstractSocket__error)(QAbstractSocket::SocketError) = &QAbstractSocket::error;
connect(m_socket, QAbstractSocket__error, this, &IpcConnection::closeWithError);
connect(m_socket, &QAbstractSocket::readyRead, this, &IpcConnection::readData);
}
/**
* \brief Close the connection and delete it
*/
void IpcConnection::close()
{
DEBUG << "IpcConnection::close()";
emit connectionClosed();
}
/**
* \brief Report errors and close the connection
*/
void IpcConnection::closeWithError()
{
DEBUG << "IpcConnection::closeWithError: " << m_socket->errorString();
emit error(m_socket->errorString());
close();
}
/**
* \brief handles incoming data
*/
void IpcConnection::readData()
{
while (m_socket->bytesAvailable()) {
if (!m_headerComplete) {
//Not enough bytesAvailable() try again later.
if (!m_socket->canReadLine())
return;
while (m_socket->canReadLine()) {
QString line = m_socket->readLine().trimmed();
DEBUG << "\treceived header: " << line;
if (line.isEmpty()) {
DEBUG << "\theader complete";
if (m_headers.contains("Method") || m_headers.contains("Content-Length")) {
m_headerComplete = true;
} else { // we can't recover
qWarning() << "\tincomplete header";
reset();
}
break;
}
QStringList parts = line.split(":");
if (parts.count() != 2) {
qWarning() << "invalid header line: " << line;
break;
}
m_headers.insert(parts.at(0).trimmed(), parts.at(1).trimmed());
}
}
if (m_headerComplete) {
int bufferSize = m_headers.value("Content-Length").toInt();
if (bufferSize > m_maxContentSize) {
qWarning() << "content to large to be received. max size: " << m_maxContentSize;
reset();
return;
}
DEBUG << "receive content (bytes): " << bufferSize;
if (m_socket->bytesAvailable() < bufferSize) {
DEBUG << "content wait for more data";
return;
} else {
QByteArray content;
content.resize(bufferSize);
if (m_socket->read(content.data(), bufferSize) != bufferSize) {
qWarning() << "error reading content from stream";
}
QString method = m_headers.value("Method");
reset();
emit received(method, content);
}
}
}
}
/**
* \brief Max bytes we are able to receive. Defaults to 10Mbytes.
* Returns the max content size
*/
qint64 IpcConnection::maxContentSize() const
{
return m_maxContentSize;
}
void IpcConnection::reset()
{
m_headerComplete = false;
m_headers.clear();
}
QTcpSocket *IpcConnection::socket() const
{
return m_socket;
}
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