org.eclipse.jetty.server.HttpOutput Maven / Gradle / Ivy
// ========================================================================
// Copyright (c) 2008-2009 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.io.Writer;
import javax.servlet.ServletOutputStream;
import org.eclipse.jetty.http.AbstractGenerator;
import org.eclipse.jetty.http.Generator;
import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.eclipse.jetty.io.EofException;
import org.eclipse.jetty.util.ByteArrayOutputStream2;
/** Output.
*
*
* Implements {@link javax.servlet.ServletOutputStream} from the javax.servlet
package.
*
* A {@link ServletOutputStream} implementation that writes content
* to a {@link AbstractGenerator}. The class is designed to be reused
* and can be reopened after a close.
*/
public class HttpOutput extends ServletOutputStream
{
protected final AbstractGenerator _generator;
protected final long _maxIdleTime;
private boolean _closed;
// These are held here for reuse by Writer
String _characterEncoding;
Writer _converter;
char[] _chars;
ByteArrayOutputStream2 _bytes;
/* ------------------------------------------------------------ */
public HttpOutput(AbstractGenerator generator, long maxIdleTime)
{
_generator=generator;
_maxIdleTime=maxIdleTime;
}
/* ------------------------------------------------------------ */
public boolean isWritten()
{
return _generator.getContentWritten()>0;
}
/* ------------------------------------------------------------ */
/*
* @see java.io.OutputStream#close()
*/
@Override
public void close() throws IOException
{
_closed=true;
}
/* ------------------------------------------------------------ */
public boolean isClosed()
{
return _closed;
}
/* ------------------------------------------------------------ */
public void reopen()
{
_closed=false;
}
/* ------------------------------------------------------------ */
@Override
public void flush() throws IOException
{
_generator.flush(_maxIdleTime);
}
/* ------------------------------------------------------------ */
@Override
public void write(byte[] b, int off, int len) throws IOException
{
write(new ByteArrayBuffer(b,off,len));
}
/* ------------------------------------------------------------ */
/*
* @see java.io.OutputStream#write(byte[])
*/
@Override
public void write(byte[] b) throws IOException
{
write(new ByteArrayBuffer(b));
}
/* ------------------------------------------------------------ */
/*
* @see java.io.OutputStream#write(int)
*/
@Override
public void write(int b) throws IOException
{
if (_closed)
throw new IOException("Closed");
if (!_generator.isOpen())
throw new EofException();
// Block until we can add _content.
while (_generator.isBufferFull())
{
_generator.blockForOutput(_maxIdleTime);
if (_closed)
throw new IOException("Closed");
if (!_generator.isOpen())
throw new EofException();
}
// Add the _content
if (_generator.addContent((byte)b))
// Buffers are full so flush.
flush();
if (_generator.isAllContentWritten())
{
flush();
close();
}
}
/* ------------------------------------------------------------ */
private void write(Buffer buffer) throws IOException
{
if (_closed)
throw new IOException("Closed");
if (!_generator.isOpen())
throw new EofException();
// Block until we can add _content.
while (_generator.isBufferFull())
{
_generator.blockForOutput(_maxIdleTime);
if (_closed)
throw new IOException("Closed");
if (!_generator.isOpen())
throw new EofException();
}
// Add the _content
_generator.addContent(buffer, Generator.MORE);
// Have to flush and complete headers?
if (_generator.isAllContentWritten())
{
flush();
close();
}
else if (_generator.isBufferFull())
flush();
// Block until our buffer is free
while (buffer.length() > 0 && _generator.isOpen())
{
_generator.blockForOutput(_maxIdleTime);
}
}
/* ------------------------------------------------------------ */
/*
* @see javax.servlet.ServletOutputStream#print(java.lang.String)
*/
@Override
public void print(String s) throws IOException
{
write(s.getBytes());
}
}