/****************************************************************************** $Id: qt/smtp.cpp   3.3.4   edited May 27 2003 $**** Copyright (C) 1992-2000 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 "smtp.h"#include <qtextstream.h>#include <qsocket.h>#include <qdns.h>#include <qtimer.h>#include <qapplication.h>#include <qmessagebox.h>#include <qregexp.h>Smtp::Smtp( const QString &from, const QString &to,	    const QString &subject,	    const QString &body ){    socket = new QSocket( this );    connect ( socket, SIGNAL( readyRead() ),	      this, SLOT( readyRead() ) );    connect ( socket, SIGNAL( connected() ),	      this, SLOT( connected() ) );    mxLookup = new QDns( to.mid( to.find( '@' )+1 ), QDns::Mx );    connect( mxLookup, SIGNAL(resultsReady()),	     this, SLOT(dnsLookupHelper()) );    message = QString::fromLatin1( "From: " ) + from +	      QString::fromLatin1( "\nTo: " ) + to +	      QString::fromLatin1( "\nSubject: " ) + subject +	      QString::fromLatin1( "\n\n" ) + body + "\n";    message.replace( QString::fromLatin1( "\n" ),		     QString::fromLatin1( "\r\n" ) );    message.replace( QString::fromLatin1( "\r\n.\r\n" ),		     QString::fromLatin1( "\r\n..\r\n" ) );    this->from = from;    rcpt = to;    state = Init;}Smtp::~Smtp(){    delete t;    delete socket;}void Smtp::dnsLookupHelper(){    QValueList<QDns::MailServer> s = mxLookup->mailServers();    if ( s.isEmpty() ) {	if ( !mxLookup->isWorking() )	    emit status( tr( "Error in MX record lookup" ) );	return;    }    emit status( tr( "Connecting to %1" ).arg( s.first().name ) );    socket->connectToHost( s.first().name, 25 );    t = new QTextStream( socket );}void Smtp::connected(){    emit status( tr( "Connected to %1" ).arg( socket->peerName() ) );}void Smtp::readyRead(){    // SMTP is line-oriented    if ( !socket->canReadLine() )	return;    QString responseLine;    do {	responseLine = socket->readLine();	response += responseLine;    } while( socket->canReadLine() && responseLine[3] != ' ' );    responseLine.truncate( 3 );    if ( state == Init && responseLine[0] == '2' ) {	// banner was okay, let's go on	*t << "HELO there\r\n";	state = Mail;    } else if ( state == Mail && responseLine[0] == '2' ) {	// HELO response was okay (well, it has to be)	*t << "MAIL FROM: <" << from << ">\r\n";	state = Rcpt;    } else if ( state == Rcpt && responseLine[0] == '2' ) {	*t << "RCPT TO: <" << rcpt << ">\r\n";	state = Data;    } else if ( state == Data && responseLine[0] == '2' ) {	*t << "DATA\r\n";	state = Body;    } else if ( state == Body && responseLine[0] == '3' ) {	*t << message << ".\r\n";	state = Quit;    } else if ( state == Quit && responseLine[0] == '2' ) {	*t << "QUIT\r\n";	// here, we just close.	state = Close;	emit status( tr( "Message sent" ) );    } else if ( state == Close ) {	deleteLater();	return;    } else {	// something broke.	QMessageBox::warning( qApp->activeWindow(),			      tr( "Qt Mail Example" ),			      tr( "Unexpected reply from SMTP server:\n\n" ) +			      response );	state = Close;    }    response = "";}