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//
// ========================================================================
// Copyright (c) 1995-2014 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.server;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.SharedBlockingCallback;
import org.eclipse.jetty.util.SharedBlockingCallback.Blocker;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
public class HttpInputOverHTTP extends HttpInput<ByteBuffer> implements Callback
{
private static final Logger LOG = Log.getLogger(HttpInputOverHTTP.class);
private final SharedBlockingCallback _readBlocker = new SharedBlockingCallback();
private final HttpConnection _httpConnection;
private ByteBuffer _content;
/**
* @param httpConnection
*/
public HttpInputOverHTTP(HttpConnection httpConnection)
{
_httpConnection = httpConnection;
}
@Override
public void recycle()
{
synchronized (lock())
{
super.recycle();
_content=null;
}
}
@Override
protected void blockForContent() throws IOException
{
while(true)
{
try (Blocker blocker=_readBlocker.acquire())
{
_httpConnection.fillInterested(blocker);
LOG.debug("{} block readable on {}",this,blocker);
}
Object content=getNextContent();
if (content!=null || isFinished())
break;
}
}
@Override
public String toString()
{
return String.format("%s@%x",getClass().getSimpleName(),hashCode());
}
@Override
protected ByteBuffer nextContent() throws IOException
{
// If we have some content available, return it
if (BufferUtil.hasContent(_content))
return _content;
// No - then we are going to need to parse some more content
_content=null;
ByteBuffer requestBuffer = _httpConnection.getRequestBuffer();
while (!_httpConnection.getParser().isComplete())
{
// Can the parser progress (even with an empty buffer)
_httpConnection.getParser().parseNext(requestBuffer==null?BufferUtil.EMPTY_BUFFER:requestBuffer);
// If we got some content, that will do for now!
if (BufferUtil.hasContent(_content))
return _content;
// No, we can we try reading some content?
if (BufferUtil.isEmpty(requestBuffer) && _httpConnection.getEndPoint().isInputShutdown())
{
_httpConnection.getParser().atEOF();
continue;
}
// OK lets read some data
int filled=_httpConnection.getEndPoint().fill(requestBuffer);
if (LOG.isDebugEnabled()) // Avoid boxing of variable 'filled'
LOG.debug("{} filled {}",this,filled);
if (filled<=0)
{
if (filled<0)
{
_httpConnection.getParser().atEOF();
continue;
}
return null;
}
}
return null;
}
@Override
protected int remaining(ByteBuffer item)
{
return item.remaining();
}
@Override
protected int get(ByteBuffer item, byte[] buffer, int offset, int length)
{
int l = Math.min(item.remaining(), length);
item.get(buffer, offset, l);
return l;
}
@Override
protected void consume(ByteBuffer item, int length)
{
item.position(item.position()+length);
}
@Override
public void content(ByteBuffer item)
{
if (BufferUtil.hasContent(_content))
throw new IllegalStateException();
_content=item;
}
@Override
protected void unready()
{
_httpConnection.fillInterested(this);
}
@Override
public void succeeded()
{
_httpConnection.getHttpChannel().getState().onReadPossible();
}
@Override
public void failed(Throwable x)
{
super.failed(x);
_httpConnection.getHttpChannel().getState().onReadPossible();
}
}
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