src/java/examples/messages.java

/***
 * $RCSfile: messages.java,v $ $Revision: 1.1 $ $Date: 2002/04/03 01:04:23 $
 *
 * NetComponents Internet Protocol Library
 * Copyright (C) 1997-2002  Daniel F. Savarese
 *
 * 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 in the LICENSE file; if not, write
 * to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA  02111-1307  USA
 ***/

import java.io.*;

import com.oroinc.net.pop3.*;

/***
 * This is an example program demonstrating how to use the POP3Client class.
 * This program connects to a POP3 server and retrieves the message
 * headers of all the messages, printing the From: and Subject: header
 * entries for each message.
 * <p>
 * Usage: messages <pop3 server hostname> <username> <password>
 * <p>
 ***/
public final class messages {

  public static final void printMessageInfo(BufferedReader reader, int id)
       throws IOException
  {
    String line, lower, from, subject;

    from    = "";
    subject = "";

    while((line = reader.readLine()) != null) {
      lower = line.toLowerCase();
      if(lower.startsWith("from: "))
	from = line.substring(6).trim();
      else if(lower.startsWith("subject: "))
	subject = line.substring(9).trim();
    }

    System.out.println(Integer.toString(id) + " From: " + from +
		       "  Subject: " + subject);
  }

  public static final void main(String[] args) {
    int message;
    String server, username, password;
    POP3Client pop3;
    Reader reader;
    POP3MessageInfo[] messages;

    if(args.length < 3) {
      System.err.println(
	 "Usage: messages <pop3 server hostname> <username> <password>");
      System.exit(1);
    }

    server   = args[0];
    username = args[1];
    password = args[2];

    pop3 = new POP3Client();
    // We want to timeout if a response takes longer than 60 seconds
    pop3.setDefaultTimeout(60000);

    try {
      pop3.connect(server);
    } catch(IOException e) {
      System.err.println("Could not connect to server.");
      e.printStackTrace();
      System.exit(1);
    }

    try {
      if(!pop3.login(username, password)) {
	System.err.println("Could not login to server.  Check password.");
	pop3.disconnect();
	System.exit(1);
      }

      messages = pop3.listMessages();

      if(messages == null) {
	System.err.println("Could not retrieve message list.");
	pop3.disconnect();
	System.exit(1);
      } else if(messages.length == 0) {
	System.out.println("No messages");
	pop3.logout();
	pop3.disconnect();
	System.exit(1);
      }

      for(message = 0; message < messages.length; message++) {
	reader = pop3.retrieveMessageTop(messages[message].number, 0);

	if(reader == null) {
	  System.err.println("Could not retrieve message header.");
	  pop3.disconnect();
	  System.exit(1);
	}

	printMessageInfo(new BufferedReader(reader), messages[message].number);
      }

      pop3.logout();
      pop3.disconnect();
    } catch(IOException e) {
      e.printStackTrace();
      System.exit(1);
    }
  }
}