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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.fcgi.parser;
import java.nio.ByteBuffer;
import org.eclipse.jetty.fcgi.FCGI;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* <p>A stream content parser parses frames of type STDIN, STDOUT and STDERR.</p>
* <p>STDOUT frames are handled specially by {@link ResponseContentParser}.
*/
public class StreamContentParser extends ContentParser
{
private static final Logger LOG = Log.getLogger(StreamContentParser.class);
private final FCGI.StreamType streamType;
private final Parser.Listener listener;
private State state = State.LENGTH;
private int contentLength;
public StreamContentParser(HeaderParser headerParser, FCGI.StreamType streamType, Parser.Listener listener)
{
super(headerParser);
this.streamType = streamType;
this.listener = listener;
}
@Override
public Result parse(ByteBuffer buffer)
{
while (buffer.hasRemaining())
{
switch (state)
{
case LENGTH:
{
contentLength = getContentLength();
state = State.CONTENT;
break;
}
case CONTENT:
{
int length = Math.min(contentLength, buffer.remaining());
int limit = buffer.limit();
buffer.limit(buffer.position() + length);
ByteBuffer slice = buffer.slice();
buffer.position(buffer.limit());
buffer.limit(limit);
contentLength -= length;
if (onContent(slice))
return Result.ASYNC;
if (contentLength > 0)
break;
state = State.LENGTH;
return Result.COMPLETE;
}
default:
{
throw new IllegalStateException();
}
}
}
return Result.PENDING;
}
@Override
public void noContent()
{
try
{
listener.onEnd(getRequest());
}
catch (Throwable x)
{
if (LOG.isDebugEnabled())
LOG.debug("Exception while invoking listener " + listener, x);
}
}
protected boolean onContent(ByteBuffer buffer)
{
try
{
return listener.onContent(getRequest(), streamType, buffer);
}
catch (Throwable x)
{
if (LOG.isDebugEnabled())
LOG.debug("Exception while invoking listener " + listener, x);
return false;
}
}
protected void end(int request)
{
}
private enum State
{
LENGTH, CONTENT
}
}
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