SMTP talker class
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS
* 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.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
///
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ConnectException;
import java.net.NoRouteToHostException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.StringTokenizer;
/**
* SMTP talker class, usable standalone (as a SendMail(8) backend) or inside
* applications such as JabaDex that need to send mail..
*
* OBSOLETE!! Use javax.mail instead, now that it's available!
*
* Needs more parameterization - bit of a hack to start. Should use same
* interface as Mailer (subclass, and override doSend()).
*
* @author Ian Darwin
* @version $Id: SmtpTalk.java,v 1.10 2002/10/26 13:53:45 ian Exp $
*/
public class SmtpTalk {
BufferedReader is;
PrintStream os;
private boolean debug = true;
private String host;
/**
* A simple main program showing the class in action.
*
* TODO generalize to accept From arg, read msg on stdin
*/
public static void main(String[] argv) {
if (argv.length != 2) {
System.err.println("Usage: java SmtpTalk host user");
System.exit(1);
}
try {
SmtpTalk st = new SmtpTalk(argv[0]);
System.out.println("SMTP Talker ready");
st.converse("MAILER-DAEMON@daroad.darwinsys.com", argv[1],
"Test message", "Hello there");
} catch (Exception ig) {
System.err.println(ig.getMessage());
System.exit(0);
}
}
/**
* Constructor taking a server hostname as argument.
*/
SmtpTalk(String server) throws Exception {
host = server;
try {
Socket s = new Socket(host, 25);
is = new BufferedReader(new InputStreamReader(s.getInputStream()));
os = new PrintStream(s.getOutputStream());
} catch (NoRouteToHostException e) {
die( "No route to host " + host);
} catch (ConnectException e) {
die("Connection Refused by " + host);
} catch (UnknownHostException e) {
die("Unknown host " + host);
} catch (IOException e) {
die( "I/O error setting up socket streams\n" + e);
}
}
/** Send a command with an operand */
protected void send_cmd(String cmd, String oprnd) {
send_cmd(cmd + " " + oprnd);
}
/* Send a command with no operand */
protected void send_cmd(String cmd) {
if (debug)
System.out.println(">>> " + cmd);
os.print(cmd + "\r\n");
}
/** Send_text sends the body of the message. */
public void send_text(String text) {
os.print(text + "\r\n");
}
/** Expect (read and check for) a given reply */
protected boolean expect_reply(String rspNum) throws Exception {
String s = null;
try {
s = is.readLine();
} catch (IOException e) {
die( "I/O error reading from host " + host + " " + e);
}
if (debug)
System.out.println("<<< " + s);
return s.startsWith(rspNum + " ");
}
/**
* Convenience routine to print message & exit, like K&P error(), perl
* die(), ...
*
* @param ret
* Numeric value to pass back
* @param msg
* Error message to be printed on stdout.
*/
protected void die(String msg) throws Exception {
throw new Exception( msg);
}
/**
* send one Mail message to one or more recipients via smtp to server
* "host".
*/
public void converse(String sender, String recipients, String subject,
String body) throws Exception {
if (!expect_reply("220"))
die("did not get SMTP greeting");
send_cmd("HELO", "darwinsys.com");
if (!expect_reply("250"))
die("did not ack our HELO");
send_cmd("MAIL", "From:<" + sender + ">"); // no spaces!
if (!expect_reply("250"))
die("did not ack our MAIL command");
StringTokenizer st = new StringTokenizer(recipients);
while (st.hasMoreTokens()) {
String r = st.nextToken();
send_cmd("RCPT", "To:<" + r + ">");
if (!expect_reply("250"))
die("didn't ack RCPT " + r);
}
send_cmd("DATA");
if (!expect_reply("354"))
die("did not want our DATA!");
send_text("From: " + sender);
send_text("To: " + recipients);
send_text("Subject: " + subject);
send_text("");
send_text(body + "\r");
send_cmd(".");
if (!expect_reply("250"))
die("Mail not accepted");
send_cmd("QUIT");
if (!expect_reply("221"))
die("Other end not closing down");
}
}
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