Mega Code Archive
Thread based server
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#ifndef FORTUNESERVER_H
#define FORTUNESERVER_H
#include <QStringList>
#include <QTcpServer>
class FortuneServer : public QTcpServer
{
Q_OBJECT
public:
FortuneServer(QObject *parent = 0);
protected:
void incomingConnection(int socketDescriptor);
private:
QStringList fortunes;
};
#endif
#include "fortuneserver.h"
#include "fortunethread.h"
#include <stdlib.h>
FortuneServer::FortuneServer(QObject *parent)
: QTcpServer(parent)
{
fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
<< tr("You've got to think about tomorrow.")
<< tr("You will be surprised by a loud noise.")
<< tr("You will feel hungry again in another hour.")
<< tr("You might have mail.")
<< tr("You cannot kill time without injuring eternity.")
<< tr("Computers are not intelligent. They only think they are.");
}
void FortuneServer::incomingConnection(int socketDescriptor)
{
QString fortune = fortunes.at(qrand() % fortunes.size());
FortuneThread *thread = new FortuneThread(socketDescriptor, fortune, this);
connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
thread->start();
}
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include "fortuneserver.h"
QT_BEGIN_NAMESPACE
class QLabel;
class QPushButton;
QT_END_NAMESPACE
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = 0);
private:
QLabel *statusLabel;
QPushButton *quitButton;
FortuneServer server;
};
#endif
#include <QtGui>
#include <QtNetwork>
#include <stdlib.h>
#include "dialog.h"
#include "fortuneserver.h"
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
{
statusLabel = new QLabel;
quitButton = new QPushButton(tr("Quit"));
quitButton->setAutoDefault(false);
if (!server.listen()) {
QMessageBox::critical(this, tr("Threaded Fortune Server"),
tr("Unable to start the server: %1.")
.arg(server.errorString()));
close();
return;
}
statusLabel->setText(tr("The server is running on port %1.\n"
"Run the Fortune Client example now.")
.arg(server.serverPort()));
connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addStretch(1);
buttonLayout->addWidget(quitButton);
buttonLayout->addStretch(1);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(statusLabel);
mainLayout->addLayout(buttonLayout);
setLayout(mainLayout);
setWindowTitle(tr("Threaded Fortune Server"));
}
#ifndef FORTUNETHREAD_H
#define FORTUNETHREAD_H
#include <QThread>
#include <QTcpSocket>
class FortuneThread : public QThread
{
Q_OBJECT
public:
FortuneThread(int socketDescriptor, const QString &fortune, QObject *parent);
void run();
signals:
void error(QTcpSocket::SocketError socketError);
private:
int socketDescriptor;
QString text;
};
#endif
#include "fortunethread.h"
#include <QtNetwork>
FortuneThread::FortuneThread(int socketDescriptor, const QString &fortune, QObject *parent)
: QThread(parent), socketDescriptor(socketDescriptor), text(fortune)
{
}
void FortuneThread::run()
{
QTcpSocket tcpSocket;
if (!tcpSocket.setSocketDescriptor(socketDescriptor)) {
emit error(tcpSocket.error());
return;
}
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_0);
out << (quint16)0;
out << text;
out.device()->seek(0);
out << (quint16)(block.size() - sizeof(quint16));
tcpSocket.write(block);
tcpSocket.disconnectFromHost();
tcpSocket.waitForDisconnected();
}
#include <QApplication>
#include <QtCore>
#include <stdlib.h>
#include "dialog.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Dialog dialog;
dialog.show();
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
return dialog.exec();
}
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