/*MujMail - Simple mail client for J2MECopyright (C) 2008 David Hauzar <david.hauzar.mujmail@gmail.com> This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2 of the License, or(at your option) any later version.This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */package mujmail.protocols;import java.util.Vector;import mujmail.BodyPart;import mujmail.util.Decode;import mujmail.util.Functions;//#ifdef MUJMAIL_FSimport mujmail.FileSystemMailExporter;//#endifimport mujmail.Lang;import mujmail.MessageHeader;import mujmail.MyException;import mujmail.TheBox;import mujmail.connections.ConnectionInterface;import mujmail.protocols.SMTP.SMTPMailSender;import mujmail.tasks.StoppableProgress;/** * Abstract class providing interface and basic functionality for sending mails * to the object of class BasicConnection. *  * This means that it is possible to send mails to the SMTP connection as well * as to the file system connection. *  * To use this class, implement methods close_() and open_() that must * correctly establish and close the connection. *  * @see MailSender.SMTP_Mode * @see SMTPMailSender * @see FileSystemMailExporter *  * @author David Hauzar */public abstract class MailSender {    private static final String SOURCE_FILE = "mujmail.MailSender";    /** True if the connection is opened. */    private boolean connectionOpened = false;    /** Email will be sent to this connection */    protected final ConnectionInterface connection;    /**     * Constructor.     * @param connection the object to which the mail will be sent     */    protected MailSender(ConnectionInterface connection) {        this.connection = connection;    }    /**     * Sends given mail to the connection of MailSender.     * Deparses the content of the mail from entries of the instance      * of MessageHeader.     *      * TODO: Warning: return value of capturedMailText:     * - the return value is there just because we sometimes need (according to settings)     * to send the content furthermore to the directory SENT on the imap account     * - the problem is that cumulating the content of the sent mail in string     * can lead to BufferOverflow     * - it would be better to sent email to directory SENT separately     *      * - to not cause BufferOverflow the content of attachments is not cumulating     * now: see methods sendAttachment     *      * TODO2: we are cumulating the content of sent mail even if the content     * is not needed     *      * @param mail the mail which will be sent to the connection     * @return the content of sent mail;     *  empty string if sending of mail was not succesfull (server replied 250..)     */    public String sendMailToConnection(MessageHeader message,             SendingModes sendingMode, StoppableProgress progress, TheBox reportBox )        throws MyException, Exception, Throwable {                if (!connectionOpened) {            throw new MyException(MyException.PROTOCOL_CANNOT_CONNECT, "The connection must be opened before sending the mail");        }                        String capturedMailText = "";        Vector rcps = null;        String tmpRcp;        // boundary defined in multipart messages (ie. with attached file)        String boundary = "16509XY-120sR7729-tree0";        // -- + boundary used in multipart email body        String boundaryInBody = "--" + boundary;        String tmpMailLine = "";        capturedMailText = ""; // Clear text before capturing new message                       tmpMailLine = "MAIL FROM: <" + Functions.emailOnly(message.getFrom()) + ">";        capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);        connection.sendCRLF(tmpMailLine);        connection.getLine();        // send recipients        rcps = message.getRcp();        for (short i = (short) (rcps.size() - 1); i >= 0; --i) {            tmpRcp = (String) rcps.elementAt(i);            tmpMailLine = "RCPT TO: <" + tmpRcp + ">";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            connection.getLine();        }                if (sendingMode.sendDataCommand()) {            tmpMailLine = "DATA";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            connection.getLine();        }        tmpMailLine = "Return-Path: <" + Functions.emailOnly(message.getFrom()) + ">";        capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);        connection.sendCRLF(tmpMailLine);        tmpMailLine = "Date: " + message.getTimeStr() + " " + Functions.getLocalTimeZone();        capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);        connection.sendCRLF(tmpMailLine);        tmpMailLine = "From: " + message.getFrom();        capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);        connection.sendCRLF(tmpMailLine);        short i;        i = (short) message.getRecipients().indexOf("To:");        if (i != -1) {            tmpRcp = Functions.encodeRcpNames(message.getRecipients().substring(i, message.getRecipients().indexOf(" *", i + 3)));            capturedMailText = captureStrCRLF(capturedMailText, tmpRcp);            connection.sendCRLF(tmpRcp);        }        i = (short) message.getRecipients().indexOf("Cc:");        if (i != -1) {            tmpRcp = Functions.encodeRcpNames(message.getRecipients().substring(i, message.getRecipients().indexOf(" *", i + 3)));            capturedMailText = captureStrCRLF(capturedMailText, tmpRcp);            connection.sendCRLF(tmpRcp);        }        i = (short) message.getRecipients().indexOf("Bcc:");        if (i != -1) {            tmpRcp = Functions.encodeRcpNames(message.getRecipients().substring(i, message.getRecipients().indexOf(" *", i + 4)));            capturedMailText = captureStrCRLF(capturedMailText, tmpRcp);            connection.sendCRLF(tmpRcp);        }        tmpMailLine = "Subject: " + sendingMode.encodeHeaderField(message.getSubject());        capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);        connection.sendCRLF(tmpMailLine);        // plain or multipart email "intro" at end of email header        if (message.isPlain()) {            tmpMailLine = "MIME-Version: 1.0";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = "Content-Type: text/plain; charset=UTF-8";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = sendingMode.getContentTransferEncodingLine();            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = "Content-Disposition: inline";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);        } else if (!message.isPlain()) {            tmpMailLine = "MIME-Version: 1.0";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = "Content-Type: multipart/mixed; boundary=\"" + boundary + "\"";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);        }        connection.sendCRLF("");        capturedMailText = captureStrCRLF(capturedMailText, "");        // if multipart email, add below before text body         if (!message.isPlain()) {            tmpMailLine = boundaryInBody;            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = "Content-Type: text/plain; charset=UTF-8";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = "Content-Transfer-Encoding: base64";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            tmpMailLine = "Content-Disposition: inline";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);            connection.sendCRLF("");            capturedMailText = captureStrCRLF(capturedMailText, "");        }        if (message.getBodyPartCount() >= 1) {            capturedMailText = message.getBodyPart((byte)0).getStorage().                    sendContentToConnection(connection, sendingMode, true);        }        // send attachements        // if multi message, add below before base64 encoded attached file        if (!message.isPlain()) {            for (int n = 0; n < message.getAttachementCount(); n++) {                tmpMailLine = sendAttachement(message.getAttachement(n), boundaryInBody,                        sendingMode);                capturedMailText = capturedMailText + tmpMailLine;            }            tmpMailLine = boundaryInBody + "--";            capturedMailText = captureStrCRLF(capturedMailText, tmpMailLine);            connection.sendCRLF(tmpMailLine);        }