76个qt 例子。 非常适合学习qt编程

				/****************************************************************************
				** $Id: qt/server.cpp   3.3.1   edited May 27 2003 $
				**
				** Copyright (C) 1992-2002 Trolltech AS.  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 
				#include 
				#include 
				#include 
				#include 
				#include 
				
				#include "server.h"
				
				
				
				ServerInfo::ServerInfo( Q_UINT16 port, QWidget *parent, const char *name ) :
				    ServerInfoBase( parent, name )
				{
				    SimpleServer *server = new SimpleServer( port, this, "simple server" );
				    connect( server, SIGNAL(newConnect()), SLOT(newConnect()) );
				    connect( btnQuit, SIGNAL(clicked()), qApp, SLOT(quit()) );
				}
				
				void ServerInfo::newConnect()
				{
				    infoText->append( tr( "New connection\n" ) );
				}
				
				
				SimpleServer::SimpleServer( Q_UINT16 port, QObject* parent, const char *name ) :
				    QServerSocket( port, 1, parent, name )
				{
				    if ( !ok() ) {
					QMessageBox::critical( 0, tr( "Error" ), tr( "Failed to bind to port %1" ).arg( port ) );
					exit(1);
				    }
				}
				
				void SimpleServer::newConnection( int socket )
				{
				    (void)new ClientSocket( socket, &info, this, "client socket" );
				    emit newConnect();
				}
				
				
				ClientSocket::ClientSocket( int sock, InfoData *i, QObject *parent, const char *name ) :
				    QSocket( parent, name ), info( i )
				{
				    connect( this, SIGNAL(readyRead()), SLOT(readClient()) );
				    connect( this, SIGNAL(connectionClosed()), SLOT(connectionClosed()) );
				    setSocket( sock );
				}
				
				void ClientSocket::readClient()
				{
				    QTextStream stream( this );
				    QStringList answer;
				    while ( canReadLine() ) {
					stream 				    }
				}
				
				QString ClientSocket::processCommand( const QString& command )
				{
				    QString answer;
				    QString com = command.simplifyWhiteSpace ();
				    if ( com.startsWith( "LIST" ) ) {
					bool ok;
					QStringList nodes = info->list( com.mid( 5 ), &ok );
					if ( ok ) {
					    for ( QStringList::Iterator it = nodes.begin(); it != nodes.end(); ++it ) 
						answer += "212+" + *it + "\r\n";
					    answer += "212 \r\n";
					} else 
					    answer += "550 Invalid path\r\n";	
				    } else if ( com.startsWith( "GET " ) ) {
					bool ok;
					QStringList data = QStringList::split( '\n', info->get( com.mid( 4 ), &ok ), TRUE );
					if ( ok ) {
					    for ( QStringList::Iterator it = data.begin(); it != data.end(); ++it ) 
						answer += "213+" + *it + "\r\n";
					    answer += "213 \r\n";
					} else 
					    answer += "550 Info not found\r\n";	
				    } else 
					answer += "500 Syntax error\r\n";	
				
				    return answer;
				}
				
				void ClientSocket::connectionClosed()
				{
				    delete this;
				}