lucee.runtime.net.mail.SMTPVerifier.java Source code

Introduction

Here is the source code for lucee.runtime.net.mail.SMTPVerifier.java

Source

/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.runtime.net.mail;

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;

import lucee.commons.lang.StringUtil;
import lucee.runtime.net.smtp.SMTPClient;

import org.apache.commons.mail.DefaultAuthenticator;

/**
 * SMTP Server verifier
 */
public final class SMTPVerifier {

    /**
     * verify mail server
     * @param host
     * @param username
     * @param password
     * @param port
     * @return are the setting ok
     * @throws SMTPException 
     */
    public static boolean verify(String host, String username, String password, int port) throws SMTPException {
        try {
            return _verify(host, username, password, port);
        } catch (MessagingException e) {

            // check user
            if (!StringUtil.isEmpty(username)) {
                try {
                    _verify(host, null, null, port);
                    throw new SMTPExceptionImpl(
                            "can't connect to mail server, authentication settings are invalid");
                } catch (MessagingException e1) {

                }
            }
            // check port
            if (port > 0 && port != 25) {
                try {
                    _verify(host, null, null, 25);
                    throw new SMTPExceptionImpl("can't connect to mail server, port definition is invalid");
                } catch (MessagingException e1) {
                }
            }

            throw new SMTPExceptionImpl("can't connect to mail server");
        }
    }

    private static boolean _verify(String host, String username, String password, int port)
            throws MessagingException {
        boolean hasAuth = !StringUtil.isEmpty(username);

        Properties props = new Properties();
        props.put("mail.smtp.host", host);
        if (hasAuth)
            props.put("mail.smtp.auth", "true");
        if (hasAuth)
            props.put("mail.smtp.user", username);
        if (hasAuth)
            props.put("mail.transport.connect-timeout", "30");
        if (port > 0)
            props.put("mail.smtp.port", String.valueOf(port));

        Authenticator auth = null;
        if (hasAuth)
            auth = new DefaultAuthenticator(username, password);
        Session session = Session.getInstance(props, auth);

        Transport transport = session.getTransport("smtp");
        if (hasAuth)
            transport.connect(host, username, password);
        else
            transport.connect();
        boolean rtn = transport.isConnected();
        transport.close();

        return rtn;
    }
}