/*
* 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.webapp;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;
import com.caucho.server.cache.AbstractCacheEntry;
import com.caucho.server.cache.AbstractCacheFilterChain;
import com.caucho.server.http.AbstractResponseStream;
import com.caucho.server.http.CauchoResponse;
import com.caucho.server.http.ToByteResponseStream;
public class IncludeResponseStream2 extends ToByteResponseStream {
private static final Logger log
= Logger.getLogger(IncludeResponseStream2.class.getName());
private final IncludeResponse _response;
private AbstractResponseStream _stream;
private ServletOutputStream _os;
private PrintWriter _writer;
private OutputStream _cacheStream;
private Writer _cacheWriter;
private boolean _isCommitted;
private ArrayList<String> _headerKeys = new ArrayList<String>();
private ArrayList<String> _headerValues = new ArrayList<String>();
IncludeResponseStream2(IncludeResponse response)
{
if (response == null)
throw new NullPointerException();
_response = response;
}
@Override
public void start()
{
if (_os != null || _writer != null)
throw new IllegalStateException();
ServletResponse next = _response.getResponse();
if (next == null)
throw new NullPointerException();
if (next instanceof CauchoResponse) {
CauchoResponse cNext = (CauchoResponse) next;
if (cNext.isCauchoResponseStream())
_stream = cNext.getResponseStream();
}
_isCommitted = false;
_headerKeys.clear();
_headerValues.clear();
super.start();
// server/053n
try {
setEncoding(next.getCharacterEncoding());
} catch (Exception e) {
log.log(Level.WARNING, e.toString(), e);
}
}
/**
* Returns true for a caucho response stream.
*/
public boolean isCauchoResponseStream()
{
return _stream != null;
}
/**
* Set true for a caucho response stream.
*/
/*
public void setCauchoResponseStream(boolean isCaucho)
{
_isCauchoResponseStream = isCaucho;
}
*/
void addHeader(String key, String value)
{
_headerKeys.add(key);
_headerValues.add(value);
}
List<String> getHeaderKeys() {
return _headerKeys;
}
List<String> getHeaderValues() {
return _headerValues;
}
/**
* Sets any cache stream.
*/
@Override
public void setByteCacheStream(OutputStream cacheStream)
{
_cacheStream = cacheStream;
}
/**
* Sets any cache stream.
*/
@Override
public void setCharCacheStream(Writer cacheWriter)
{
_cacheWriter = cacheWriter;
}
public Writer getCharCacheStream()
{
return _cacheWriter;
}
/**
* Converts the char buffer.
*/
@Override
protected void flushCharBuffer()
throws IOException
{
int charLength = getCharOffset();
if (charLength == 0)
return;
if (_stream != null) {
// jsp/18ek
super.flushCharBuffer();
return;
}
setCharOffset(0);
char []buffer = getCharBuffer();
startCaching(false);
getWriter().write(buffer, 0, charLength);
if (_cacheWriter != null) {
_cacheWriter.write(buffer, 0, charLength);
}
}
/**
* Sets the byte buffer offset.
*/
public void setBufferOffset(int offset)
throws IOException
{
super.setBufferOffset(offset);
if (_stream == null)
flushByteBuffer();
}
/**
* Sets the byte buffer offset.
*/
@Override
public byte []nextBuffer(int offset)
throws IOException
{
super.nextBuffer(offset);
if (_stream == null)
flushByteBuffer();
return getBuffer();
}
/**
* Writes a byte
* @param ch byte to write
*/
@Override
public void write(int ch)
throws IOException
{
flushCharBuffer();
if (_stream != null) {
super.write(ch);
}
else {
getOutputStream().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
*/
@Override
public void write(byte []buf, int offset, int length)
throws IOException
{
flushCharBuffer();
// jsp/15dv
// server/2h0m
if (_cacheStream != null)
_cacheStream.write(buf, offset, length);
if (_cacheWriter != null) {
// server/2h0m
// XXX: _response.killCache();
}
if (_stream != null)
super.write(buf, offset, length);
else
getOutputStream().write(buf, offset, length);
}
@Override
protected void writeHeaders(int length)
{
startCaching(true);
}
/**
* 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
*/
@Override
protected void writeNext(byte []buf, int offset, int length, boolean isEnd)
throws IOException
{
try {
/* XXX:
if (_response != null)
_response.writeHeaders(null, -1);
*/
// startCaching(true);
if (length == 0)
return;
if (_cacheStream != null) {
_cacheStream.write(buf, offset, length);
}
if (_stream != null)
_stream.write(buf, offset, length);
else
getOutputStream().write(buf, offset, length);
} catch (IOException e) {
/*
if (_next instanceof CauchoResponse)
((CauchoResponse) _next).killCache();
if (_response != null)
_response.killCache();
*/
throw e;
}
}
protected void startCaching(boolean isByte)
{
if (_isCommitted)
return;
_isCommitted = true;
AbstractCacheFilterChain cacheInvocation
= _response.getCacheInvocation();
if (cacheInvocation == null)
return;
// _cacheInvocation = cacheInvocation;
String contentType = null;
String charEncoding = null;
int contentLength = -1;
AbstractCacheEntry cacheEntry
= cacheInvocation.startCaching(_response.getRequest(), _response,
_headerKeys, _headerValues,
contentType,
charEncoding,
contentLength);
if (cacheEntry == null)
return;
cacheEntry.setForwardEnclosed(_response.isForwardEnclosed());
if (isByte)
_cacheStream = cacheEntry.openOutputStream();
else
_cacheWriter = cacheEntry.openWriter();
}
/**
* flushing
*/
@Override
public void flushByte()
throws IOException
{
flushBuffer();
getOutputStream().flush();
}
/**
* flushing
*/
@Override
public void flushChar()
throws IOException
{
flushBuffer();
getWriter().flush();
}
private OutputStream getOutputStream()
throws IOException
{
if (_os == null) {
_os = _response.getResponse().getOutputStream();
}
return _os;
}
private Writer getWriter()
throws IOException
{
if (_writer == null) {
_writer = _response.getResponse().getWriter();
}
return _writer;
}
/*
public void killCaching()
{
AbstractCacheEntry cacheEntry = _newCacheEntry;
_newCacheEntry = null;
if (cacheEntry != null) {
_cacheInvocation.killCaching(cacheEntry);
setByteCacheStream(null);
setCharCacheStream(null);
}
}
*/
/**
* Finish.
*/
@Override
protected void closeImpl()
throws IOException
{
super.closeImpl();
flushBuffer();
/*
if (_writer != null)
_writer.flush();
if (_os != null)
_os.flush();
*/
closeCache();
_stream = null;
_os = null;
_writer = null;
_cacheStream = null;
_cacheWriter = null;
}
public void completeCache()
{
AbstractCacheFilterChain cache = _response.getCacheInvocation();
try {
flushBuffer();
OutputStream cacheStream = _cacheStream;
_cacheStream = null;
Writer cacheWriter = getCharCacheStream();
setCharCacheStream(null);
if (cacheStream != null)
cacheStream.close();
if (cacheWriter != null)
cacheWriter.close();
if (cache != null)
cache.finishCaching(_response);
} catch (IOException e) {
log.log(Level.WARNING, e.toString(), e);
} finally {
// _response.setCacheInvocation(null);
if (cache != null)
cache.killCaching(_response);
}
}
private void closeCache()
throws IOException
{
AbstractCacheFilterChain cache = _response.getCacheInvocation();
OutputStream cacheStream = _cacheStream;
_cacheStream = null;
Writer cacheWriter = getCharCacheStream();
setCharCacheStream(null);
if (cacheStream != null)
cacheStream.close();
if (cacheWriter != null)
cacheWriter.close();
if (cache != null)
cache.killCaching(_response);
}
}