/****************************************************************************** $Id: qt/client.cpp   3.1.1   edited Feb 6 2002 $**** 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 <qsocket.h>#include <qapplication.h>#include <qtextedit.h>#include <qlineedit.h>#include <qlabel.h>#include <qpushbutton.h>#include <qtextstream.h>#include <qlistbox.h>#include "client.h"ClientInfo::ClientInfo( QWidget *parent, const char *name ) :    ClientInfoBase( parent, name ), socket( 0 ){    edHost->setText( "localhost" );    edPort->setText( QString::number( (uint)infoPort ) );    connect( infoList, SIGNAL(selected(const QString&)), SLOT(selectItem(const QString&)) );    connect( btnConnect, SIGNAL(clicked()), SLOT(connectToServer()) );    connect( btnBack, SIGNAL(clicked()), SLOT(stepBack()) );    connect( btnQuit, SIGNAL(clicked()), qApp, SLOT(quit()) );}void ClientInfo::connectToServer(){    delete socket;    socket = new QSocket( this );    connect( socket, SIGNAL(connected()), SLOT(socketConnected()) );    connect( socket, SIGNAL(connectionClosed()), SLOT(socketConnectionClosed()) );    connect( socket, SIGNAL(readyRead()), SLOT(socketReadyRead()) );    connect( socket, SIGNAL(error(int)), SLOT(socketError(int)) );    socket->connectToHost( edHost->text(), edPort->text().toInt() );}void ClientInfo::selectItem( const QString& item ){    // item in listBox selected, use LIST or GET depending of the node type.    if ( item.endsWith( "/" ) ) {	sendToServer( List, infoPath->text() + item );	infoPath->setText( infoPath->text() + item );    } else 	sendToServer( Get, infoPath->text() + item );}void ClientInfo::stepBack(){    // go back (up) in path hierarchy    int i = infoPath->text().findRev( '/', -2 );    if ( i > 0 ) 	infoPath->setText( infoPath->text().left( i + 1 ) );    else	infoPath->setText( "/" );    infoList->clear();    sendToServer( List, infoPath->text() );}void ClientInfo::socketConnected(){    sendToServer( List, "/" );}void ClientInfo::sendToServer( Operation op, const QString& location ){    QString line;    switch (op) {	case List:	    infoList->clear();	    line = "LIST " + location;	    break;	case Get:	    line = "GET " + location;	    break;    }    infoText->clear();    QTextStream os(socket);    os << line << "\r\n";}void ClientInfo::socketReadyRead(){    QTextStream stream( socket );    QString line;    while ( socket->canReadLine() ) {	line = stream.readLine();	if ( line.startsWith( "500" ) || line.startsWith( "550" ) ) {	    infoText->append( tr( "error: " ) + line.mid( 4 ) );	} else if ( line.startsWith( "212+" ) ) {	    infoList->insertItem( line.mid( 6 ) + QString( ( line[ 4 ] == 'D' ) ? "/" : "" ) );	} else if ( line.startsWith( "213+" ) ) {	    infoText->append( line.mid( 4 ) );	}    }}void ClientInfo::socketConnectionClosed(){    infoText->clear();    infoText->append( tr( "error: Connection closed by the server\n" ) );}void ClientInfo::socketError( int code ){    infoText->clear();    infoText->append( tr( "error: Error number %1 occurred\n" ).arg( code ) );}