QTfrontend/net/tcpBase.cpp
author koda
Tue, 23 Oct 2012 06:50:19 +0200
changeset 7794 ab7b94c03bc9
parent 7673 e06b83cbde74
child 8069 bb7671829935
permissions -rw-r--r--
QMessageBox overhaul: unify buttons, style and appearance of info dialogs, fixing a few typos and return values along the way
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
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 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include "tcpBase.h"
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#include <QMessageBox>
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#include <QList>
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#include <QApplication>
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#include <QImage>
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#include "hwconsts.h"
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QList<TCPBase*> srvsList;
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QPointer<QTcpServer> TCPBase::IPCServer(0);
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TCPBase::~TCPBase()
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{
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    if (IPCSocket)
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        IPCSocket->deleteLater();
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}
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TCPBase::TCPBase(bool demoMode) :
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    m_isDemoMode(demoMode),
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    IPCSocket(0)
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{
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    if(!IPCServer)
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    {
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        IPCServer = new QTcpServer(0);
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        IPCServer->setMaxPendingConnections(1);
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        if (!IPCServer->listen(QHostAddress::LocalHost))
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        {
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            QMessageBox deniedMsg(QApplication::activeWindow());
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            deniedMsg.setIcon(QMessageBox::Critical);
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            deniedMsg.setWindowTitle(QMessageBox::tr("TCP - Error"));
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            deniedMsg.setText(QMessageBox::tr("Unable to start the server: %1.").arg(IPCServer->errorString()));
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            deniedMsg.setWindowModality(Qt::WindowModal);
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            deniedMsg.exec();
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            exit(0); // FIXME - should be graceful exit here (lower Critical -> Warning above when implemented)
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        }
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    }
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    ipc_port=IPCServer->serverPort();
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}
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void TCPBase::NewConnection()
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{
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    if(IPCSocket)
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    {
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        // connection should be already finished
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        return;
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    }
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    disconnect(IPCServer, SIGNAL(newConnection()), this, SLOT(NewConnection()));
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    IPCSocket = IPCServer->nextPendingConnection();
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    if(!IPCSocket) return;
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    connect(IPCSocket, SIGNAL(disconnected()), this, SLOT(ClientDisconnect()));
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    connect(IPCSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));
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    SendToClientFirst();
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    if(srvsList.size()==1) srvsList.pop_front();
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    emit isReadyNow();
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}
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void TCPBase::RealStart()
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{
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    connect(IPCServer, SIGNAL(newConnection()), this, SLOT(NewConnection()));
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    IPCSocket = 0;
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    QProcess * process;
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    process = new QProcess;
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    connect(process, SIGNAL(error(QProcess::ProcessError)), this, SLOT(StartProcessError(QProcess::ProcessError)));
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    QStringList arguments=getArguments();
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    // redirect everything written on stdout/stderr
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    if(isDevBuild)
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        process->setProcessChannelMode(QProcess::ForwardedChannels);
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    process->start(bindir->absolutePath() + "/hwengine", arguments);
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}
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void TCPBase::ClientDisconnect()
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{
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    disconnect(IPCSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));
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    onClientDisconnect();
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 /*   if(srvsList.size()==1) srvsList.pop_front();
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    emit isReadyNow();*/
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    IPCSocket->deleteLater();
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    // make sure this object is not in the server list anymore
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    srvsList.removeOne(this);
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    deleteLater();
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}
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void TCPBase::ClientRead()
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{
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    QByteArray readed=IPCSocket->readAll();
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    if(readed.isEmpty()) return;
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    readbuffer.append(readed);
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    onClientRead();
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}
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void TCPBase::StartProcessError(QProcess::ProcessError error)
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{
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    QMessageBox deniedMsg(QApplication::activeWindow());
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    deniedMsg.setIcon(QMessageBox::Critical);
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    deniedMsg.setWindowTitle(QMessageBox::tr("TCP - Error"));
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    deniedMsg.setText(QMessageBox::tr("Unable to run engine at ") + bindir->absolutePath() + "/hwengine\n" +
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                      QMessageBox::tr("Error code: %1").arg(error));
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    deniedMsg.setWindowModality(Qt::WindowModal);
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    deniedMsg.exec();
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    ClientDisconnect();
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}
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void TCPBase::tcpServerReady()
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{
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    disconnect(srvsList.takeFirst(), SIGNAL(isReadyNow()), this, SLOT(tcpServerReady()));
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    RealStart();
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}
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void TCPBase::Start()
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{
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    if(srvsList.isEmpty())
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    {
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        srvsList.push_back(this);
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    }
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    else
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    {
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        connect(srvsList.back(), SIGNAL(isReadyNow()), this, SLOT(tcpServerReady()));
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        srvsList.push_back(this);
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        return;
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    }
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    RealStart();
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}
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void TCPBase::onClientRead()
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{
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}
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void TCPBase::onClientDisconnect()
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{
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}
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void TCPBase::SendToClientFirst()
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{
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}
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void TCPBase::SendIPC(const QByteArray & buf)
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{
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    if (buf.size() > MAXMSGCHARS) return;
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    quint8 len = buf.size();
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    RawSendIPC(QByteArray::fromRawData((char *)&len, 1) + buf);
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}
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void TCPBase::RawSendIPC(const QByteArray & buf)
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{
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    if (!IPCSocket)
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    {
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        toSendBuf += buf;
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    }
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    else
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    {
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        if (toSendBuf.size() > 0)
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        {
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            IPCSocket->write(toSendBuf);
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            if(m_isDemoMode) demo.append(toSendBuf);
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            toSendBuf.clear();
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        }
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        if(!buf.isEmpty())
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        {
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            IPCSocket->write(buf);
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            if(m_isDemoMode) demo.append(buf);
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        }
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    }
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}