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Gemini is a web framework created by TechEmpower.
/*******************************************************************************
* Copyright (c) 2018, TechEmpower, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name TechEmpower, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL TECHEMPOWER, INC. BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/
package com.techempower.util;
import java.io.*;
import java.text.*;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import com.techempower.helper.*;
/**
* SimpleEmailer is intended for use from a command line. It can be used
* to send an e-mail to a specified e-mail server using a template file and
* a list of "macros" to insert into the template. Theoretically, it could
* be used from within an application, but generally the gemini.email
* package should be used for that purpose.
*/
public class SimpleEmailer
{
//
// Member variables.
//
private String mailServer;
//
// Member methods.
//
/**
* Empty constructor.
*/
public SimpleEmailer(String mailServer)
{
this.mailServer = mailServer;
}
/**
* Sends an e-mail.
*/
public boolean sendEmail(String username, String password, String from, String to,
String subject, String body, Map macros)
{
String messageBody = StringHelper.macroExpand(macros, body);
String messageSubject = StringHelper.macroExpand(macros, subject);
return sendEmail(username, password, from, to, messageSubject, messageBody);
}
/**
* Sends an e-mail (no macros).
*/
public boolean sendEmail(String username, String password, String from,
String to, String subject, String body)
{
// A reference to the mail session, set by finding the mail server
// below.
Session mailSession;
// If there is a mail server specified in the EmailPackage itself,
// we'll use that. Note that this is not very common.
Properties props = new Properties();
props.put("mail.smtp.host", this.mailServer);
props.put("mail.smtp.connectiontimeout", "60000"); // 60 seconds
props.put("mail.smtp.timeout", "60000"); // 60 seconds
Authenticator authenticator = null;
if (StringHelper.isNonEmpty(username))
{
authenticator = new EmailAuthenticator(username, password);
props.put("mail.smtp.auth", "true");
}
// Get a new session for these properties.
mailSession = javax.mail.Session.getInstance(props, authenticator);
// Create a reference to the MimeMessage.
MimeMessage message;
// Construct the MimeMessage.
try
{
message = new MimeMessage(mailSession);
message.addFrom(InternetAddress.parse(from, false));
message.setReplyTo(InternetAddress.parse(from, false));
message.addRecipients(javax.mail.Message.RecipientType.TO,
InternetAddress.parse(to, false));
message.setSubject(subject);
message.setContent(body, "text/plain");
// Attempt the delivery.
try
{
// This method -should- return either very quickly or within the
// timeout period specified in the Properties file provided
// during the construction of the Session object.
Transport.send(message);
}
catch (Exception exc)
{
log("Exception during JavaMail transport: " + exc);
return false;
}
}
catch (Exception exc)
{
log("Exception prior to JavaMail transport:" + exc);
return false;
}
return true;
}
/**
* Process command line options.
*/
public static void main(String[] args)
{
if (args.length >= 5)
{
String server = args[0];
String from = args[1];
String to = args[2];
String subject = args[3];
String file = args[4];
int macrosStart = 5;
String username = "";
String password = "";
if ((args.length >= 7) && ("-u".equals(args[5])))
{
username = args[6];
macrosStart = 7;
}
if ((args.length >= 9) && ("-p".equals(args[7])))
{
password = args[8];
macrosStart = 9;
}
log("Srv: " + server);
log("From: " + from);
log("To: " + to);
log("Subj: " + subject);
log("Body: " + file);
if (StringHelper.isNonEmpty(username))
{
log("User: " + username);
}
if (StringHelper.isNonEmpty(password))
{
log("Pass: Provided");
}
Map macros = new HashMap<>();
for (int i = macrosStart; i < args.length; i++)
{
int index = i - macrosStart + 1;
if (index < 10)
{
macros.put("$0" + index, args[i]);
log("$0" + index + ": " + args[i]);
}
else
{
macros.put("$" + index, args[i]);
log("$" + index + ": " + args[i]);
}
}
Date now = new Date();
DateFormat timeFormat = new SimpleDateFormat("HH:mm");
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
macros.put("$time", timeFormat.format(now));
macros.put("$date", dateFormat.format(now));
String body = "";
try (
FileInputStream fis = new FileInputStream(file)
)
{
byte[] buffer = new byte[fis.available()];
fis.read(buffer, 0, buffer.length);
body = new String(buffer);
}
catch (IOException ioexc)
{
log("IOException: " + ioexc);
}
SimpleEmailer emailer = new SimpleEmailer(server);
emailer.sendEmail(username, password, from, to, subject, body, macros);
}
else
{
log("SimpleEmailer usage");
log("SimpleEmailer.bat mailserver from to subject templatefile [-u username] [-p password] macro1..n");
}
}
/**
* Displays messages on System.out.
*/
public static void log(String logString)
{
System.out.println("SmEm: " + logString);
}
/**
* Authenticator subclass.
*/
static class EmailAuthenticator
extends Authenticator
{
private final PasswordAuthentication pauth;
/**
* Constructor
*/
public EmailAuthenticator(final String username, final String password)
{
this.pauth = new PasswordAuthentication(username, password);
}
/**
* Gets a PasswordAuthentication object.
*/
@Override
protected PasswordAuthentication getPasswordAuthentication()
{
return this.pauth;
}
}
} // End SimpleEmailer.