60 lines
1.8 KiB
Java
60 lines
1.8 KiB
Java
/*
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* DavMail POP/IMAP/SMTP/CalDav/LDAP Exchange Gateway
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* Copyright (C) 2010 Mickael Guessant
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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package davmail.exchange;
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import java.io.FilterOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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/**
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* Replace single dot lines with double dot.
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*/
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public class DoubleDotOutputStream extends FilterOutputStream {
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enum State {
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CR, CRLF, CRLFDOT
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}
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State currentState;
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/**
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* @inheritDoc
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*/
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public DoubleDotOutputStream(OutputStream out) {
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super(out);
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}
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@Override
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public void write(int b) throws IOException {
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if (currentState == null && b == '\r') {
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currentState = State.CR;
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} else if (currentState == State.CR && b == '\n') {
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currentState = State.CRLF;
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} else if (currentState == State.CRLF && b == '.') {
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currentState = State.CRLFDOT;
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} else if (currentState == State.CRLFDOT && b == '\r') {
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out.write('.');
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currentState = null;
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} else {
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currentState = null;
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}
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out.write(b);
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}
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}
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