/****************************************************************************** $Id: qt/qip.cpp   3.3.4   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 <qsocket.h>#include <qurlinfo.h>#include <qurloperator.h>#include <qtextstream.h>#include "qip.h"Qip::Qip(){    state = Start;    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)) );}int Qip::supportedOperations() const{    return OpListChildren | OpGet;}bool Qip::checkConnection( QNetworkOperation * ){    if ( socket->isOpen() )	return TRUE;    // don't call connectToHost() if we are already trying to connect    if ( socket->state() == QSocket::Connecting )	return FALSE;    socket->connectToHost( url()->host(), url()->port() != -1 ? url()->port() : infoPort );    return FALSE;}void Qip::operationListChildren( QNetworkOperation * ){    QTextStream os(socket);    os << "LIST " + url()->path() + "\r\n";    operationInProgress()->setState( StInProgress );}void Qip::operationGet( QNetworkOperation * ){    QTextStream os(socket);    os << "GET " + url()->path() + "\r\n";    operationInProgress()->setState( StInProgress );}void Qip::socketConnected(){    if ( url() )	emit connectionStateChanged( ConConnected, tr( "Connected to host %1" ).arg( url()->host() ) );    else	emit connectionStateChanged( ConConnected, tr ("Connected to host" ) );}void Qip::socketConnectionClosed(){    if ( url() )	emit connectionStateChanged( ConClosed, tr( "Connection to %1 closed" ).arg( url()->host() ) );    else	emit connectionStateChanged( ConClosed, tr ("Connection closed" ) );}void Qip::socketError( int code ){    if ( code == QSocket::ErrHostNotFound ||	 code == QSocket::ErrConnectionRefused ) {	error( ErrHostNotFound, tr( "Host not found or couldn't connect to: %1\n" ).arg( url()->host() ) );    } else	error( ErrUnsupported, tr( "Error" ) );}void Qip::socketReadyRead(){    // read from the server    QTextStream stream( socket );    QString line;    while ( socket->canReadLine() ) {	line = stream.readLine();	if ( line.startsWith( "500" ) ) {	    error( ErrValid, line.mid( 4 ) ); 	} else if ( line.startsWith( "550" ) ) {	    error( ErrFileNotExisting, line.mid( 4 ) ); 	} else if ( line.startsWith( "212+" ) ) {	    if ( state != List ) {		state = List;	        emit start( operationInProgress() );	    }	    QUrlInfo inf;	    inf.setName( line.mid( 6 ) + QString( ( line[ 4 ] == 'D' ) ? "/" : "" ) );	    inf.setDir( line[ 4 ] == 'D' );	    inf.setSymLink( FALSE );	    inf.setFile( line[ 4 ] == 'F' );	    inf.setWritable( FALSE );	    inf.setReadable( TRUE );	    emit newChild( inf, operationInProgress() );	} else if ( line.startsWith( "213+" ) ) {	    state = Data;	    emit data( line.mid( 4 ).utf8(), operationInProgress() );	}	if( line[3] == ' ' && state != Start) {	    state = Start;	    operationInProgress()->setState( StDone );	    emit finished( operationInProgress() );	}    }}void Qip::error( int code, const QString& msg ){    if ( operationInProgress() ) {	operationInProgress()->setState( StFailed );	operationInProgress()->setErrorCode( code );	operationInProgress()->setProtocolDetail( msg );	clearOperationQueue();	emit finished( operationInProgress() );    }    state = Start;}