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/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include <qsocket.h>
#include <qserversocket.h>
#include <qapplication.h>
#include <qvbox.h>
#include <qtextview.h>
#include <qlabel.h>
#include <qpushbutton.h>
#include <qtextstream.h>
#include <stdlib.h>
/*
The ClientSocket class provides a socket that is connected with a client.
For every client that connects to the server, the server creates a new
instance of this class.
*/
class ClientSocket : public QSocket
{
Q_OBJECT
public:
ClientSocket( int sock, QObject *parent=0, const char *name=0 ) :
QSocket( parent, name )
{
line = 0;
connect( this, SIGNAL(readyRead()),
SLOT(readClient()) );
connect( this, SIGNAL(connectionClosed()),
SLOT(deleteLater()) );
setSocket( sock );
}
~ClientSocket()
{
}
signals:
void logText( const QString& );
private slots:
void readClient()
{
QTextStream ts( this );
while ( canReadLine() ) {
QString str = ts.readLine();
emit logText( tr("Read: '%1'\n").arg(str) );
ts << line << ": " << str << endl;
emit logText( tr("Wrote: '%1: %2'\n").arg(line).arg(str) );
line++;
}
}
private:
int line;
};
/*
The SimpleServer class handles new connections to the server. For every
client that connects, it creates a new ClientSocket -- that instance is now
responsible for the communication with that client.
*/
class SimpleServer : public QServerSocket
{
Q_OBJECT
public:
SimpleServer( QObject* parent=0 ) :
QServerSocket( 4242, 1, parent )
{
if ( !ok() ) {
qWarning("Failed to bind to port 4242");
exit(1);
}
}
~SimpleServer()
{
}
void newConnection( int socket )
{
ClientSocket *s = new ClientSocket( socket, this );
emit newConnect( s );
}
signals:
void newConnect( ClientSocket* );
};
/*
The ServerInfo class provides a small GUI for the server. It also creates the
SimpleServer and as a result the server.
*/
class ServerInfo : public QVBox
{
Q_OBJECT
public:
ServerInfo()
{
SimpleServer *server = new SimpleServer( this );
QString itext = tr(
"This is a small server example.\n"
"Connect with the client now."
);
QLabel *lb = new QLabel( itext, this );
lb->setAlignment( AlignHCenter );
infoText = new QTextView( this );
QPushButton *quit = new QPushButton( tr("Quit") , this );
connect( server, SIGNAL(newConnect(ClientSocket*)),
SLOT(newConnect(ClientSocket*)) );
connect( quit, SIGNAL(clicked()), qApp,
SLOT(quit()) );
}
~ServerInfo()
{
}
private slots:
void newConnect( ClientSocket *s )
{
infoText->append( tr("New connection\n") );
connect( s, SIGNAL(logText(const QString&)),
infoText, SLOT(append(const QString&)) );
connect( s, SIGNAL(connectionClosed()),
SLOT(connectionClosed()) );
}
void connectionClosed()
{
infoText->append( tr("Client closed connection\n") );
}
private:
QTextView *infoText;
};
int main( int argc, char** argv )
{
QApplication app( argc, argv );
ServerInfo info;
app.setMainWidget( &info );
info.show();
return app.exec();
}
#include "server.moc"
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