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/*
* PostStream.java
* Copyright (C) 2002, 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.nntp;
import java.io.FilterOutputStream;
import java.io.OutputStream;
import java.io.IOException;
/**
* A stream to which article contents should be written.
*
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
*/
public final class PostStream
extends FilterOutputStream
{
private static final int LF = 0x0a;
private static final int DOT = 0x2e;
NNTPConnection connection;
boolean isTakethis;
byte last;
PostStream(NNTPConnection connection, boolean isTakethis)
{
super(connection.out);
this.connection = connection;
this.isTakethis = isTakethis;
}
public void write(int c)
throws IOException
{
super.write(c);
if (c == DOT && last == LF)
{
super.write(c); // double up initial dot
}
last = (byte) c;
}
public void write(byte[] bytes)
throws IOException
{
write(bytes, 0, bytes.length);
}
public void write(byte[] bytes, int pos, int len)
throws IOException
{
int end = pos + len;
for (int i = pos; i < end; i++)
{
byte c = bytes[i];
if (c == DOT && last == LF)
{
// Double dot
if (i > pos)
{
// Write everything up to i
int l = i - pos;
super.write(bytes, pos, l);
pos += l;
len -= l;
}
else
{
super.write(DOT);
}
}
last = c;
}
if (len > 0)
{
super.write(bytes, pos, len);
}
}
/**
* Close the stream.
* This calls NNTPConnection.postComplete().
*/
public void close()
throws IOException
{
if (last != 0x0d)
{
// Need to add LF
write(0x0d);
}
if (isTakethis)
{
connection.takethisComplete();
}
else
{
connection.postComplete();
}
}
}
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