mailsender.java

手机邮箱撒的方式方式方式的

/*
MujMail - Simple mail client for J2ME
Copyright (C) 2008 David Hauzar <[e-mail]>
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the 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 of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 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_FS
import mujmail.FileSystemMailExporter;
//#endif
import 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);
        }