smtp.cpp

/*
Copyright (c) 2012 Nicholas Smith

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.*/

#include "smtp.h"

Smtp::Smtp(const QString &serverName, const QString &username, const QString &password, const QString &from, const QStringList &to, const QString &subject, const QString &body)
{
    server = serverName; //your server name
    user = username; //your SMTP username
    pass = password; //your SMTP password

    user = user.toLocal8Bit().toBase64();
    pass = pass.toLocal8Bit().toBase64();

    x = 1;
    int recipCount = 0;
    socket = new QTcpSocket(this);

    connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
    connect(socket, SIGNAL(connected()), this, SLOT(connected() ) );
    connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this,
             SLOT(errorReceived(QAbstractSocket::SocketError)));
    connect(socket, SIGNAL(stateChanged( QAbstractSocket::SocketState)), this,
             SLOT(stateChanged(QAbstractSocket::SocketState)));
    connect(socket, SIGNAL(disconnected()), this,
            SLOT(disconnected()));

    qDebug() << "Signals created";

    for(recipCount = 0; recipCount < to.count(); recipCount++)
    {
        message.append("To: " + to.at(recipCount) + "\n");
    }
    message.append("From: " + from + "\n");
    message.append("Subject: " + subject + "\n");
    message.append("Mime-Version: 1.0;\n");
    message.append("Content-Type: text/html; charset=\"utf8\";\n");
    message.append("Content-Transfer-Encoding: 8bit;\n");
    message.append("\n");
    qDebug() << "body is: " << body;
    message.append(body);
    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.at(0);
    recips = to;
    state = Init;
    socket->connectToHost(server, 25);
    if(socket->waitForConnected(30000))
    {
        qDebug("connected");
    }

    t = new QTextStream( socket );
}
Smtp::~Smtp()
{
    qDebug() << "Destroying";
    finished();
    delete t;
    delete socket;
}

void Smtp::stateChanged(QAbstractSocket::SocketState socketState)
{

    qDebug() <<"stateChanged: " << socketState;

}

void Smtp::errorReceived(QAbstractSocket::SocketError socketError)
{
    qDebug() << " error:" <<socketError;

}

void Smtp::disconnected()
{
    qDebug() << "Disconnected: "  << socket->errorString();
}

void Smtp::connected()
{
}

void Smtp::readyRead()
{
    QString rLine;
    do
    {
        rLine = socket->readLine();
        response += rLine;
        qDebug() << "Response is: " << response;
    }
    while (socket->canReadLine() && rLine[3] != ' ');

    rLine.truncate(3);

    if (state == Init && rLine[0] == '2')
    {
        qDebug() << "HELO there";
        *t << "HELO there\r\n";
        t->flush();

        state = Auth;
    }
    else if (state == Auth && rLine[0] == '2')
    {
        // Trying AUTH
        qDebug() << "Auth";
        *t << "AUTH LOGIN" << "\r\n";
        t->flush();
        state = User;
    }
    else if (state == User && rLine[0] == '3')
    {
        //Trying User
        qDebug() << "Username";
        *t << user << "\r\n";
        t->flush();

        state = Pass;
    }
    else if (state == Pass && rLine[0] == '3')
    {
        //Trying pass
        qDebug() << "Pass";
        *t << pass << "\r\n";
        t->flush();

        state = Mail;
    }
    else if (state == Mail && rLine[0] == '2')
    {
        qDebug() << "Mail from";
        *t << "MAIL FROM: " << from << "\r\n";
        t->flush();
        state = Rcpt;
    }
    else if (state == Rcpt && rLine[0] == '2')
    {

        qDebug() << "RCPT TO ";
        *t << "RCPT TO: " << rcpt << "\r\n";
        t->flush();
        if(recips.isEmpty() || x == recips.count() )
        {
            state = Data;
        }
        else
        {
            if(x < recips.count())
            {
                rcpt = recips.at(x);
                x++;
                state = Rcpt;
            }
        }
    }
    else if (state == Data && rLine[0] == '2')
    {
        qDebug() << "Data";
        *t << "DATA\r\n";
        t->flush();
        state = Body;
    }
    else if (state == Body && rLine[0] == '3')
    {
        qDebug() << "Body state";
        *t << message << "\r\n.\r\n";
        t->flush();
        state = Quit;
    }
    else if (state == Quit && rLine[0] == '2')
    {
        qDebug() << "Quit";
        *t << "QUIT\r\n";
        t->flush();
        // here, we just close.
        state = Close;
        emit status( tr( "Message sent" ) );
    }
    else if (state == Close)
    {
        qDebug() << "State == close";
        deleteLater();
        return;
    }
    else
    {
        //something has broken
        state = Close;
    }
    response = "";
}