/*
 *  MailSender.java
 *  
 *  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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *  
 *  Author: Winter Lau (javayou@gmail.com)
 *  http://dlog4j.sourceforge.net
 */
package com.liusoft.dlog4j.util;

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

import org.htmlparser.Node;
import org.htmlparser.Parser;
import org.htmlparser.tags.ImageTag;
import org.htmlparser.util.ParserException;

import com.liusoft.dlog4j.HtmlNodeFilters;

/**
 * 郵件發送組件,具體的使用方法參照該類的main方法
 * <code>
 * 
        String mailHost = "smtp.163.com";	//發送郵件服務器地址
        String mailUser = "user1";			//發送郵件服務器的用戶帳號
        String mailPassword = "password1";	//發送郵件服務器的用戶密碼
        String[] toAddress = {"user1@163.com"};
        //使用超文本格式發送郵件
        MailSender sendmail = MailSender.getHtmlMailSender(mailHost, mailUser,mailPassword);
        //使用純文本格式發送郵件
        //MailSender sendmail = MailSender.getTextMailSender(mailHost, mailUser,mailPassword);
        try {
            sendmail.setSubject("郵件發送測試");
            sendmail.setSendDate(new Date());
            String content = "<H1>你好,中國</H1><img src=\"http://www.javayou.com/images/logo.gif\">";
            //請注意如果是本地圖片比如使用斜杠作為目錄分隔符,如下所示
            content+="<img src=\"D:/EclipseM7/workspace/JDlog/dlog/images/rss200.png\"/>";
            sendmail.setMailContent(content); //
            sendmail.setAttachments("E:\\TOOLS\\pm_sn.txt");
            sendmail.setMailFrom("user1@163.com","發送者");
            sendmail.setMailTo(toAddress, "to");
            //sendmail.setMailTo(toAddress, "cc");//設置抄送給...
            //開始發送郵件
            System.out.println("正在發送郵件，請稍候.......");
            sendmail.sendMail();
            System.out.println("恭喜你，郵件已經成功發送!");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        
 * </code>
 * @author Liudong
 */
public abstract class MailSender extends Authenticator {

    private String username = null;		//郵件發送帳號用戶名
    private String userpasswd = null;	//郵件發送帳號用戶口令
    protected BodyPart messageBodyPart = null;
    protected Multipart multipart = new MimeMultipart("related");
    protected MimeMessage mailMessage = null;
    protected Session mailSession = null;
    protected InternetAddress mailToAddress = null;

    /**
     * 構造函數
     * @param smtpHost
     * @param username
     * @param password
     */
    protected MailSender(String smtpHost, String username, String password) {
        this(smtpHost,25,username,password);
    }
    /**
     * 構造函數
     * @param smtpHost
     * @param smtpPort
     * @param username
     * @param password
     */
    protected MailSender(String smtpHost, int smtpPort, String username, String password) {
        this.username = username;
        this.userpasswd = password;
        Properties mailProperties = System.getProperties();
        if(smtpHost!=null)
        	mailProperties.put("mail.smtp.host", smtpHost);
        if(smtpPort>0 && smtpPort!=25)
            mailProperties.put("mail.smtp.port", String.valueOf(smtpPort));
        mailProperties.put("mail.smtp.auth", "true"); //設置smtp認證，很關鍵的一句
        mailSession = Session.getDefaultInstance(mailProperties, this);
        mailMessage = new MimeMessage(mailSession);
        messageBodyPart = new MimeBodyPart();
    }
    /**
     * 構造一個純文本郵件發送實例
     * @see getTextMailSender(String smtpHost, int smtpPort, String username, String password)
     * @param smtpHost
     * @param username
     * @param password
     * @return
     */
    public static MailSender getTextMailSender(String smtpHost, String username, String password) { 
        return getTextMailSender(smtpHost,25,username,password);
    }
    /**
     * 構造一個純文本郵件發送實例
     * @param smtpHost	SMTP服務器地址
     * @param smtpPort	SMTP服務器端口
     * @param username	SMTP郵件發送帳號
     * @param password	SMTP郵件發送帳號對應的密碼
     * @return
     */
    public static MailSender getTextMailSender(String smtpHost, int smtpPort, String username, String password) {        
        return new MailSender(smtpHost,smtpPort,username,password) {
            public void setMailContent(String mailContent) throws MessagingException {
                messageBodyPart.setText(mailContent);
                multipart.addBodyPart(messageBodyPart);
            }            
        };        
    }
    /**
     * 構造一個超文本郵件發送實例
     * @see getHtmlMailSender(String smtpHost, int smtpPort, String username, String password)
     * @param smtpHost
     * @param username
     * @param password
     * @return
     */
    public static MailSender getHtmlMailSender(String smtpHost, String username, String password) {
        return getHtmlMailSender(smtpHost,25,username,password);
    }
    /**
     * 構造一個超文本郵件發送實例
     * @param smtpHost	SMTP服務器地址
     * @param smtpPort	SMTP服務器端口
     * @param username	SMTP郵件發送帳號
     * @param password	SMTP郵件發送帳號對應的密碼
     * @return
     */
    public static MailSender getHtmlMailSender(String smtpHost, int smtpPort, String username, String password) {
        return new MailSender(smtpHost,smtpPort,username,password) {
            private ArrayList arrayList1 = new ArrayList();
            private ArrayList arrayList2 = new ArrayList();

            public void setMailContent(String mailContent) throws MessagingException {
                String htmlContent = getContent(mailContent);
                messageBodyPart.setContent(htmlContent, CONTENT_TYPE);
                multipart.addBodyPart(messageBodyPart);
                //調用處理html文件中的圖片方法
                processHtmlImage(mailContent);
            }

            //處理html頁面上的圖片方法如下：
            private void processHtmlImage(String mailContent) throws MessagingException {