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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;
public class BeginRequestContentParser extends ContentParser
{
private final ServerParser.Listener listener;
private State state = State.ROLE;
private int cursor;
private int role;
private int flags;
public BeginRequestContentParser(HeaderParser headerParser, ServerParser.Listener listener)
{
super(headerParser);
this.listener = listener;
}
@Override
public Result parse(ByteBuffer buffer)
{
while (buffer.hasRemaining())
{
switch (state)
{
case ROLE:
{
if (buffer.remaining() >= 2)
{
role = buffer.getShort();
state = State.FLAGS;
}
else
{
state = State.ROLE_BYTES;
cursor = 0;
}
break;
}
case ROLE_BYTES:
{
int halfShort = buffer.get() & 0xFF;
role = (role << 8) + halfShort;
if (++cursor == 2)
state = State.FLAGS;
break;
}
case FLAGS:
{
flags = buffer.get() & 0xFF;
state = State.RESERVED;
break;
}
case RESERVED:
{
if (buffer.remaining() >= 5)
{
buffer.position(buffer.position() + 5);
onStart();
reset();
return Result.COMPLETE;
}
else
{
state = State.RESERVED_BYTES;
cursor = 0;
break;
}
}
case RESERVED_BYTES:
{
buffer.get();
if (++cursor == 5)
{
onStart();
reset();
return Result.COMPLETE;
}
break;
}
default:
{
throw new IllegalStateException();
}
}
}
return Result.PENDING;
}
private void onStart()
{
listener.onStart(getRequest(), FCGI.Role.from(role), flags);
}
private void reset()
{
state = State.ROLE;
cursor = 0;
role = 0;
flags = 0;
}
private enum State
{
ROLE, ROLE_BYTES, FLAGS, RESERVED, RESERVED_BYTES
}
}
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