Knowledge Base Nr: 00280 Qsmtp.java - http://www.swe-kaiser.de

Java: email über smtp versenden
usage: java Qsmtp 192.168.32.238 lulli.nuttzelfutzel@lulli.de alexander.herrmann@lulli.de "was soll das?" "wes isch doch net!"

  
import java.net.*;
import java.io.*;
import java.util.*;

public class Qsmtp
{
    static final int DEFAULT_PORT = 25;
    static final String EOL = "\r\n"; // network end of line

    protected DataInputStream reply = null;
    protected PrintStream send = null;
    protected Socket sock = null;

    /**
     *   Create a Qsmtp object pointing to the specified host
     *   @param hostid The host to connect to.
     *   @exception UnknownHostException
     *   @exception IOException
     */
    public Qsmtp( String hostid) throws UnknownHostException, IOException {
        this(hostid, DEFAULT_PORT);
    }

    public Qsmtp( String hostid, int port) throws UnknownHostException, IOException {
        sock = new Socket( hostid, port );
        reply = new DataInputStream( sock.getInputStream() );
        send = new PrintStream( sock.getOutputStream() );
        String rstr = reply.readLine();
        if (!rstr.startsWith("220")) throw new ProtocolException(rstr);
        while (rstr.indexOf('-') == 3) {
            rstr = reply.readLine();
            if (!rstr.startsWith("220")) throw new ProtocolException(rstr);
        }
    }

    public Qsmtp( InetAddress address ) throws IOException {
        this(address, DEFAULT_PORT);
    }

    public Qsmtp( InetAddress address, int port ) throws IOException {
        sock = new Socket( address, port );
        reply = new DataInputStream( sock.getInputStream() );
        send = new PrintStream( sock.getOutputStream() );
        String rstr = reply.readLine();
        if (!rstr.startsWith("220")) throw new ProtocolException(rstr);
        while (rstr.indexOf('-') == 3) {
            rstr = reply.readLine();
            if (!rstr.startsWith("220")) throw new ProtocolException(rstr);
        }
    }

    public void sendmsg( String from_address, String to_address,
                         String subject, String message )
                         throws IOException, ProtocolException {

        String rstr;
        String sstr;

        InetAddress local;
        try {
          local = InetAddress.getLocalHost();
        }
        catch (UnknownHostException ioe) {
          System.err.println("No local IP address found - is your network up?");
          throw ioe;
        }
        String host = local.getHostName();
        send.print("HELO " + host);
        send.print(EOL);
        send.flush();
        rstr = reply.readLine();
        if (!rstr.startsWith("250")) throw new ProtocolException(rstr);
        sstr = "MAIL FROM: " + from_address ;
        send.print(sstr);
        send.print(EOL);
        send.flush();
        rstr = reply.readLine();
        if (!rstr.startsWith("250")) throw new ProtocolException(rstr);
        sstr = "RCPT TO: " + to_address;
        send.print(sstr);
        send.print(EOL);
        send.flush();
        rstr = reply.readLine();
        if (!rstr.startsWith("250")) throw new ProtocolException(rstr);
        send.print("DATA");
        send.print(EOL);
        send.flush();
        rstr = reply.readLine();
        if (!rstr.startsWith("354")) throw new ProtocolException(rstr);
        send.print("From: " + from_address);
        send.print(EOL);
        send.print("To: " + to_address);
        send.print(EOL);
        send.print("Subject: " + subject);
        send.print(EOL);

        // Create Date - we'll cheat by assuming that local clock is right

        Date today_date = new Date();
        send.print("Date: " + msgDateFormat(today_date));
        send.print(EOL);
        send.flush();

        // Warn the world that we are on the loose - with the comments header:
        send.print("Comment: Unauthenticated sender");
        send.print(EOL);
        send.print("X-Mailer: JNet Qsmtp");
        send.print(EOL);

        // Sending a blank line ends the header part.
        send.print(EOL);

        // Now send the message proper
        send.print(message);
        send.print(EOL);
        send.print(".");
        send.print(EOL);
        send.flush();

        rstr = reply.readLine();
        if (!rstr.startsWith("250")) throw new ProtocolException(rstr);
    }

    public void close() {
      try {
        send.print("QUIT");
        send.print(EOL);
        send.flush();
        sock.close();
      }
      catch (IOException ioe) {
        // As though there's anything I can do about it now...
      }
    }

    protected void finalize() throws Throwable {
        this.close();
        super.finalize();
    }

    private String msgDateFormat( Date senddate) {
        String formatted = "hold";

        String Day[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
        String Month[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};

        formatted = Day[senddate.getDay()] + ", ";
        formatted = formatted + String.valueOf(senddate.getDate()) + " ";
        formatted = formatted + Month[senddate.getMonth()] + " ";
        if (senddate.getYear() > 99)
            formatted = formatted + String.valueOf(senddate.getYear() + 1900) + " ";
        else
            formatted = formatted + String.valueOf(senddate.getYear()) + " ";
        if (senddate.getHours() < 10) formatted = formatted + "0";
        formatted = formatted + String.valueOf(senddate.getHours()) + ":";
        if (senddate.getMinutes() < 10) formatted = formatted + "0";
        formatted = formatted + String.valueOf(senddate.getMinutes()) + ":";
        if (senddate.getSeconds() < 10) formatted = formatted + "0";
        formatted = formatted + String.valueOf(senddate.getSeconds()) + " ";
        if (senddate.getTimezoneOffset() < 0)
            formatted = formatted + "+";
        else
            formatted = formatted + "-";
        if (Math.abs(senddate.getTimezoneOffset())/60 < 10) formatted = formatted + "0";
        formatted = formatted + String.valueOf(Math.abs(senddate.getTimezoneOffset())/60);
        if (Math.abs(senddate.getTimezoneOffset())%60 < 10) formatted = formatted + "0";
        formatted = formatted + String.valueOf(Math.abs(senddate.getTimezoneOffset())%60);

        return formatted;
    }

    public static void main(String args[]) {
        String hostid = args[0]; //"192.168.32.238";
        String from_address = args[1]; //"lulli.nuttzelfutzel@lulli.de";
        String to_address = args[2]; //"alexander.herrmann@lulli.de";
        String subject = args[3]; //"was issn?";
        String message = args[4]; //"alles nix was da is.";

        try
        {
            Qsmtp smtphost = new Qsmtp(hostid);
            smtphost.sendmsg(from_address, to_address, subject, message);
        }
        catch (UnknownHostException intexc)
        {
            System.out.println("Nix wars: UnknownHostException: " +  intexc.getMessage());
        }
        catch (IOException intexc)
        {
            System.out.println("Nix wars: IOException: " +  intexc.getMessage());
        }
    }
}