diff -r 000000000000 -r 79ce65d63cce src/org/sonews/util/io/SMTPOutputStream.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/org/sonews/util/io/SMTPOutputStream.java Mon Nov 07 17:35:43 2011 +0100 @@ -0,0 +1,111 @@ +/* +GNU-Classpath Extensions: javamail +Copyright (C) 2002 Chris Burdess + +For more information on the classpathx please mail: +nferrier@tapsellferrier.co.uk + +This program 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 +of the License, or (at your option) any later version. + +This program 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 program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ +package org.sonews.util.io; // original package: gnu.mail.providers.smtp + +import java.io.FilterOutputStream; +import java.io.IOException; + +/** + * An output stream implementing the SMTP specification for dot escaping. + * Objects of this class are intended to be chained with CRLFOutputStream + * instances as all SMTP output is intended to be CRLF-escaped. + * + * @author dog@gnu.org + * @version 0.1 + */ +public class SMTPOutputStream extends FilterOutputStream { + + /** + * The LF octet. + */ + public static final int LF = 0x0a; + /** + * The dot octet. + */ + public static final int DOT = 0x2e; + /** + * The last octet read. + */ + protected int last; + + /** + * Constructs an SMTP output stream connected to the specified output stream. + * The underlying output stream should coordinate proper CRLF pairs at + * line ends. + * @param out a CRLFOutputStream + */ + public SMTPOutputStream(CRLFOutputStream out) { + super(out); + } + + /** + * Writes a character to the underlying stream. + * @exception IOException if an I/O error occurred + */ + @Override + public void write(int ch) throws IOException { + if (ch == DOT) { + if (last == LF) { + out.write(DOT); + } + } + out.write(ch); + last = ch; + } + + /** + * Writes a byte array to the underlying stream. + * @exception IOException if an I/O error occurred + */ + @Override + public void write(byte b[]) throws IOException { + write(b, 0, b.length); + } + + /** + * Writes a portion of a byte array to the underlying stream. + * @exception IOException if an I/O error occurred + */ + @Override + public void write(byte b[], int off, int len) throws IOException { + int d = off; + len += off; + for (int i = off; i < len; i++) { + switch (b[i]) { + case DOT: + int l = (i - d); + if (l > 0) { + out.write(b, d, l); + } + d = i; + if (last == LF) { + out.write(DOT); + } + break; + } + last = b[i]; + } + if (len - d > 0) { + out.write(b, d, len - d); + } + } +}