server_example.cpp

基于qt2.3.7的服务器端网络程序

#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>

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(connectionClosed()));
    
     	setSocket(sock);

      }
      
      ~ClientSocket()
       {
       }
 
 private slots:
      void readClient()
      {
      	while( canReadLine() )
     	{
          QTextStream os( this );
          os << line << ":" << readLine();
          line++;
     	}

      }
      void connectionClosed()
      {
      	delete this ;
      }

 private:
      int line;
} ;

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 )
      {
     	new ClientSocket( socket, this );
     	emit newConnect();
      
      }

 signals:
      void newConnect();

} ;

class ServerInfo : public QVBox
{
      Q_OBJECT

 public:
      ServerInfo()
      {
	SimpleServer *server = new SimpleServer( this );
     
        QString itext = QString( "This is a simple 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( "Quit", this );
     
        connect( server, SIGNAL( newConnect() ), SLOT( newConnect() ) );
        connect( quit, SIGNAL( clicked() ), qApp, SLOT( quit() ) );
      
      }

      ~ServerInfo()
      {
      }
 
 private slots:
      void newConnect()
      {
      	infoText->append( "New Connection" );
      }

 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_example.moc"