simple mailer with encoding (charset) support

Description

update for the included mailer ViewTool, allowing user to set character encoding, allowing accented and foreign characters in html mail.

fully drop-in compatible with previous mailer - if no encoding/charset provided in call.

Attachment: MailerTool.java (6 KB)

Code

package com.dotcms.plugins.mailertool;

import java.util.Date;
import java.util.Properties;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import org.apache.velocity.tools.view.tools.ViewTool;

import com.dotmarketing.util.Logger;
import com.liferay.util.JNDIUtil;
import javax.mail.internet.MimeUtility;

/**
 * Simple Email Sender ViewTool for DotCMS
 * 
 * @author Christopher Falzone <cfalzone@edinboro.edu>
 * @author Jason Tesser
 * @author Ati Rosselet
 * @version 2.0
 */
public class MailerTool implements ViewTool {

    /**
     * Sends an email
     *     
     * Example: ${esc.hash}set(${esc.dollar}error = ${esc.dollar}mailer.sendMail( 'them@theirdomain.com',
     * 'you@yourdomain.com', 'The Subject', 'The Message', false))
     * ${esc.hash}if(${esc.dollar}UtilMethods.isSet(${esc.dollar}error)) ${esc.hash}${esc.hash} Custom Error Handling ${esc.hash}else <p> Your
     * message was sent </p> ${esc.hash}end
     *     
     * @param to email address to send to
     * @param from email address to send from
     * @param subject subject of the email
     * @param message the message to send
     * @param html Whether or not to send it in HTML
     * @return Empty if Successful, or the error message otherwise
     */
    public String sendEmail(String to, String from, String subject,
            String message, Boolean html) {
        return sendEmail(to, from, subject, message, html, null);
    }
    /**
     * Sends an email using specified encoding
     *     
     * Example: ${esc.hash}set(${esc.dollar}error = ${esc.dollar}mailer.sendMail( 'them@theirdomain.com',
     * 'you@yourdomain.com', 'The Subject', 'The Message', false,'UTF-8'))
     * ${esc.hash}if(${esc.dollar}UtilMethods.isSet(${esc.dollar}error)) ${esc.hash}${esc.hash} Custom Error Handling ${esc.hash}else <p> Your
     * message was sent </p> ${esc.hash}end
     *     
     * @param to email address to send to
     * @param from email address to send from
     * @param subject subject of the email
     * @param message the message to send
     * @param html Whether or not to send it in HTML
     * @param charset Charset to use for text encoding
     * @return Empty if Successful, or the error message otherwise
     */
    public String sendEmail(String to, String from, String subject,
            String message, Boolean html, String charset) {
        Session s = null;
        try {
            Context ctx = (Context) new InitialContext();
            s = (javax.mail.Session) JNDIUtil.lookup(ctx, "mail/MailSession");
        } catch (NamingException e1) {
            Logger.error(this, e1.getMessage(), e1);
        }

        if (s == null) {
            Logger.debug(this, "No Mail Session Available.");
            return "";
        }
        String smtpServer = s.getProperty("mail.smtp.host");

        /* Attach to the session */
        Properties props = System.getProperties();
        props.put("mail.host", smtpServer);
        props.setProperty("mail.transport.protocol", "smtp");
        Session session = Session.getDefaultInstance(props, null);

        /* Create a new message */
        Message msg = new MimeMessage(session);

        /* Set To and From Address */
        try {
            msg.setFrom(new InternetAddress(from));
            msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(
                    to, false));
        } catch (Exception e) {
            Logger.error(this, "Error Assigning To and From Addresses", e);
            return "Invalid To and/or From Address: " + e.getMessage();
        }
        try {
            if (charset != null) {
                msg.setSubject(MimeUtility.encodeText(subject, charset, "B"));
            } else {
                msg.setSubject(subject);
            }
        } catch (Exception e) {
            Logger.error(this, "Error Assigning Subject", e);
            return "Invalid Subject: " + e.getMessage();
        }
        String encoding = "";
        if (charset != null) {
            encoding = "; charset=" + charset;
        }
        /* See if using HTML or not */
        if (html) {
            /* Set the HTML Message */
            try {
                msg.setContent(message, "text/html" + encoding);
            } catch (Exception e) {
                Logger.error(this, "Error Setting Content", e);
                return "Invalid Message: " + e.getMessage();
            }
        } else {
            /* Set the TEXT message */
            try {
                if (charset != null) {
                    msg.setText(MimeUtility.encodeText(message,charset, "B"));
                } else {
                    msg.setText(message);
                }
            } catch (Exception e) {
                Logger.error(this, "Error Assigning Text", e);
                return "Invalid Message: " + e.getMessage();
            }
        }

        /* Send the email */
        try {
            /* Some Headers */
            msg.setHeader("X-Mailer", "DotCMSSimpleMailer");
            msg.setSentDate(new Date());

            /* Open the transport and send the message */
            Transport transport = session.getTransport();
            transport.connect();
            transport.sendMessage(msg, msg
                    .getRecipients(Message.RecipientType.TO));
            transport.close();
        } catch (Exception e) {
            Logger.error(this, "Error Sending Message", e);
            return "Unable to Send Message: " + e.getMessage();
        }

        /*
         * At this point if there are no exceptions
         * I am assuming the email was sent
         */
        return "";
    }

    /**
     * Init Method for the viewtool
     */
    public void init(Object obj) {
    }
}