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/***************************************************************************
* Copyright (c) 2014 Werner Mayer <wmayer[at]users.sourceforge.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include <QCoreApplication>
#include <QTcpSocket>
#include <memory>
#include <stdexcept>
#include <Base/Exception.h>
#include <Base/Interpreter.h>
#include "Server.h"
using namespace Web;
Firewall* Firewall::instance = nullptr;
Firewall* Firewall::getInstance()
{
return instance;
}
void Firewall::setInstance(Firewall* inst)
{
if (inst != instance) {
delete instance;
instance = inst;
}
}
Firewall::Firewall() = default;
Firewall::~Firewall() = default;
bool Firewall::filter(const QByteArray&) const
{
return true;
}
FirewallPython::FirewallPython(const Py::Object& o)
: obj(o)
{}
FirewallPython::~FirewallPython() = default;
bool FirewallPython::filter(const QByteArray& msg) const
{
Base::PyGILStateLocker lock;
try {
Py::Callable call(obj);
Py::Tuple args(1);
args.setItem(0, Py::String(msg.constData()));
Py::Boolean ok(call.apply(args));
return static_cast<bool>(ok);
}
catch (const Py::Exception&) {
Base::PyException e;
throw Base::RuntimeError(e.what());
}
}
// ----------------------------------------------------------------------------
ServerEvent::ServerEvent(QTcpSocket* sock, const QByteArray& msg)
: QEvent(QEvent::User)
, sock(sock)
, text(msg)
{}
ServerEvent::~ServerEvent() = default;
QTcpSocket* ServerEvent::socket() const
{
return sock;
}
const QByteArray& ServerEvent::request() const
{
return text;
}
// ----------------------------------------------------------------------------
AppServer::AppServer(bool direct, QObject* parent)
: QTcpServer(parent)
, direct(direct)
{
PyObject* mod = PyImport_ImportModule("__main__");
if (mod) {
module = mod;
}
else {
throw Py::RuntimeError("Cannot load __main__ module");
}
}
void AppServer::incomingConnection(qintptr socket)
{
QTcpSocket* tcpSocket = new QTcpSocket(this);
connect(tcpSocket, &QTcpSocket::readyRead, this, &AppServer::readClient);
connect(tcpSocket, &QTcpSocket::disconnected, this, &AppServer::discardClient);
tcpSocket->setSocketDescriptor(socket);
addPendingConnection(tcpSocket);
}
void AppServer::readClient()
{
QTcpSocket* socket = static_cast<QTcpSocket*>(sender());
if (socket->bytesAvailable() > 0) {
QByteArray request = socket->readAll();
std::unique_ptr<ServerEvent> event(std::make_unique<ServerEvent>(socket, request));
if (direct) {
customEvent(event.get());
}
else {
QCoreApplication::postEvent(this, event.release());
}
}
// if (socket->state() == QTcpSocket::UnconnectedState) {
// //mark the socket for deletion but do not destroy immediately
// socket->deleteLater();
// }
}
void AppServer::discardClient()
{
QTcpSocket* socket = static_cast<QTcpSocket*>(sender());
socket->deleteLater();
}
void AppServer::customEvent(QEvent* e)
{
ServerEvent* ev = static_cast<ServerEvent*>(e);
QByteArray msg = ev->request();
QTcpSocket* socket = ev->socket();
std::string str = handleRequest(msg);
socket->write(str.c_str());
if (direct) {
socket->waitForBytesWritten();
}
socket->close();
}
std::string AppServer::handleRequest(QByteArray msg)
{
std::string str;
if (msg.startsWith("GET ")) {
msg = QByteArray("GET = ") + msg.mid(4);
str = runPython(msg);
if (str == "None") {
str = getRequest(str);
}
}
else {
str = runPython(msg);
}
return str;
}
std::string AppServer::getRequest(const std::string& str) const
{
try {
Base::PyGILStateLocker lock;
Py::Object attr = module.getAttr(std::string("GET"));
return attr.as_string();
}
catch (Py::Exception& e) {
e.clear();
return str;
}
}
std::string AppServer::runPython(const QByteArray& msg)
{
std::string str;
try {
Firewall* fw = Firewall::getInstance();
if (!fw || fw->filter(msg)) {
str = Base::Interpreter().runString(msg);
}
else {
str = "Command blocked";
}
}
catch (Base::PyException& e) {
str = e.what();
str += "\n\n";
str += e.getStackTrace();
}
catch (Base::SystemExitException&) {
throw;
}
catch (Base::Exception& e) {
str = e.what();
}
catch (std::exception& e) {
str = e.what();
}
catch (...) {
str = "Unknown exception thrown";
}
return str;
}
#include "moc_Server.cpp"
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