/*
* eXist Open Source Native XML Database
* Copyright (C) 2009 The eXist Project
* http://exist-db.org
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: RequestDecoder.java 11737 2010-05-02 21:25:21Z ixitar $
*/
package org.exist.debugger.dbgp;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.CumulativeProtocolDecoder;
import org.apache.mina.filter.codec.ProtocolDecoderOutput;
/**
* @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
*
*/
public class RequestDecoder extends CumulativeProtocolDecoder {
private String sLength = "";
private Integer length = null;
@Override
protected boolean doDecode(IoSession session, IoBuffer in,
ProtocolDecoderOutput out) throws Exception {
byte b;
while (true) {
//TODO: limit length to avoid "OutOfMemory"
if (length == null) {
if (in.remaining() > 0) {
b = in.get();
if (b == (byte)0) {
try {
length = Integer.valueOf(sLength);
} catch (java.lang.NumberFormatException e) {
length = null;
sLength = "";
}
continue;
}
sLength += (char)b;
} else {
return false;
}
} else if (in.remaining() >= length) {
ResponseImpl response = new ResponseImpl(session,
in.getSlice(length).asInputStream());
if (response.isValid())
response.getDebugger().addResponse(response);
length = null;
sLength = "";
return true;
} else {
return false;
}
}
}
}