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/*
* ComsatClient.java
* Copyright (C) 2004 The Free Software Foundation
*
* This file is part of GNU inetlib, a library.
*
* GNU inetlib is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU inetlib 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obliged to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package gnu.inet.comsat;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.util.StringTokenizer;
/**
* Simple comsat client.
*
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
*/
public class ComsatClient
{
/**
* The default comsat port.
*/
public static final int DEFAULT_PORT = 512;
protected DatagramSocket socket;
public ComsatClient()
throws IOException
{
this(DEFAULT_PORT, 0);
}
public ComsatClient(int port, int timeout)
throws IOException
{
if (port < 0)
{
port = DEFAULT_PORT;
}
socket = new DatagramSocket(port);
if (timeout > 0)
{
socket.setSoTimeout(timeout);
}
socket.setReceiveBufferSize(1024);
}
public void close()
throws IOException
{
socket.close();
}
public ComsatInfo read()
throws IOException
{
byte[] buf = new byte[socket.getReceiveBufferSize()];
int len = buf.length;
DatagramPacket packet = new DatagramPacket(buf, len);
socket.receive(packet);
buf = packet.getData();
len = packet.getLength();
String data = new String(buf, 0, len, "ISO-8859-1");
ComsatInfo info = new ComsatInfo();
StringTokenizer st = new StringTokenizer(data, "\n");
String mailbox = st.nextToken();
info.setMailbox(mailbox);
boolean inBody = false;
String lastHeader = null;
while (st.hasMoreTokens())
{
String line = st.nextToken();
if (inBody)
{
String body = info.getBody();
if (body == null)
{
body = line;
}
else
{
body += "\n" + line;
}
info.setBody(body);
}
else
{
if (line.length() == 0)
{
inBody = true;
}
else
{
int ci = line.indexOf(':');
if (ci != -1)
{
lastHeader = line.substring(0, ci);
info.setHeader(lastHeader,
line.substring(ci + 1).trim());
}
else
{
String val = info.getHeader(lastHeader);
val += "\n" + line;
info.setHeader(lastHeader, val);
}
}
}
}
return info;
}
}
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