/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.http;
import com.caucho.util.L10N;
import com.caucho.vfs.TempBuffer;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
public class WrapperResponseStream extends AbstractResponseStream {
private static final Logger log
= Logger.getLogger(WrapperResponseStream.class.getName());
static final L10N L = new L10N(WrapperResponseStream.class);
private static final int SIZE = TempBuffer.SIZE;
private final byte []_byteBuffer = new byte[SIZE];
private final char []_charBuffer = new char[SIZE];
private HttpServletResponse _next;
private ServletOutputStream _os;
private PrintWriter _writer;
public WrapperResponseStream()
{
}
public void init(HttpServletResponse next)
{
if (next == null)
throw new NullPointerException();
_next = next;
_os = null;
_writer = null;
}
/**
* Returns true for a caucho response stream.
*/
public boolean isCauchoResponseStream()
{
if (_next instanceof HttpServletResponseImpl)
return ((HttpServletResponseImpl) _next).isCauchoResponseStream();
else
return false;
}
/**
* Sets the buffer size.
*/
public void setBufferSize(int size)
{
_next.setBufferSize(size);
}
/**
* Gets the buffer size.
*/
public int getBufferSize()
{
return _next.getBufferSize();
}
/**
* Returns the remaining buffer entries.
*/
public int getRemaining()
{
//return _next.getRemaining();
return 0;
}
/**
* Returns the char buffer.
*/
public char []getCharBuffer()
{
return _charBuffer;
}
/**
* Returns the char buffer offset.
*/
public int getCharOffset()
{
return 0;
}
/**
* Sets the char buffer offset.
*/
public void setCharOffset(int offset)
{
if (offset > 0) {
try {
print(_charBuffer, 0, offset);
} catch (IOException e) {
log.log(Level.FINE, e.toString(), e);
}
}
}
/**
* Returns the next char buffer.
*/
public char []nextCharBuffer(int offset)
throws IOException
{
if (offset > 0)
print(_charBuffer, 0, offset);
return _charBuffer;
}
/**
* Writes the next chunk of data to the response stream.
*
* @param buf the buffer containing the data
* @param offset start offset into the buffer
* @param length length of the data in the buffer
*/
public void print(int ch)
throws IOException
{
if (_writer == null) {
if (_next == null)
return;
_writer = _next.getWriter();
}
_writer.write(ch);
}
/**
* Writes the next chunk of data to the response stream.
*
* @param buf the buffer containing the data
* @param offset start offset into the buffer
* @param length length of the data in the buffer
*/
public void print(char []buffer, int offset, int length)
throws IOException
{
if (length == 0)
return;
if (_writer == null) {
if (_next == null)
return;
_writer = _next.getWriter();
}
_writer.write(buffer, offset, length);
}
/**
* Returns the buffer offset.
*/
public int getBufferOffset()
{
return 0;
}
/**
* Sets the byte buffer offset.
*/
public void setBufferOffset(int offset)
{
if (offset > 0) {
try {
write(_byteBuffer, 0, offset);
} catch (IOException e) {
log.log(Level.FINE, e.toString(), e);
}
}
}
/**
* Gets the byte buffer
*/
public byte []getBuffer()
{
return _byteBuffer;
}
/**
* Returns the next buffer.
*/
public byte []nextBuffer(int offset)
throws IOException
{
if (offset > 0)
write(_byteBuffer, 0, offset);
return _byteBuffer;
}
/**
* Writes the next chunk of data to the response stream.
*
* @param buf the buffer containing the data
* @param offset start offset into the buffer
* @param length length of the data in the buffer
*/
public void write(int ch)
throws IOException
{
if (_os == null) {
if (_next == null)
return;
_os = _next.getOutputStream();
}
_os.write(ch);
}
/**
* Writes the next chunk of data to the response stream.
*
* @param buf the buffer containing the data
* @param offset start offset into the buffer
* @param length length of the data in the buffer
*/
public void write(byte []buf, int offset, int length)
throws IOException
{
if (length == 0)
return;
if (_os == null) {
if (_next == null)
return;
_os = _next.getOutputStream();
}
_os.write(buf, offset, length);
}
/**
* Writes the char buffer to the output stream.
*/
public void flushCharBuffer()
throws IOException
{
}
/**
* Flushes the buffer.
*/
public void flushBuffer()
throws IOException
{
}
/**
* Flushes the buffer.
*/
public void flushChar()
throws IOException
{
if (_writer == null) {
if (_next == null)
return;
_writer = _next.getWriter();
}
if (_writer != null)
_writer.flush();
}
/**
* Flushes the buffer.
*/
@Override
public void flushByte()
throws IOException
{
if (_os == null) {
if (_next == null)
return;
_os = _next.getOutputStream();
}
if (_os != null)
_os.flush();
}
/**
* Clears the buffer.
*/
public void clearBuffer()
{
if (_next != null)
_next.resetBuffer();
}
/**
* Flushes the output.
*/
public void flush()
throws IOException
{
if (_writer != null)
_writer.flush();
if (_os != null)
_os.flush();
}
/**
* Finish.
*/
public void finish()
throws IOException
{
/*
if (_writer != null)
_writer.flush();
if (_os != null)
_os.flush();
*/
_next = null;
_os = null;
_writer = null;
}
/**
* Close.
*/
@Override
protected void closeImpl()
throws IOException
{
super.closeImpl();
// jsp/17f0
PrintWriter writer = _writer;
_writer = null;
if (writer != null) {
try {
writer.close();
} catch (Throwable e) {
log.log(Level.FINER, e.toString(), e);
}
}
ServletOutputStream os = _os;
_os = null;
if (os != null) {
try {
os.close();
} catch (Throwable e) {
log.log(Level.FINER, e.toString(), e);
}
}
_next = null;
}
}