/*
* 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.jsp;
import com.caucho.server.http.AbstractResponseStream;
import com.caucho.util.L10N;
import com.caucho.vfs.Encoding;
import com.caucho.vfs.TempBuffer;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.Writer;
import java.util.logging.Level;
import java.util.logging.Logger;
public class BodyResponseStream extends AbstractResponseStream {
private static final Logger log
= Logger.getLogger(BodyResponseStream.class.getName());
static final L10N L = new L10N(BodyResponseStream.class);
private static final int SIZE = TempBuffer.SIZE;
private final byte []_byteBuffer = new byte[SIZE];
private final char []_charBuffer = new char[SIZE];
private Writer _out;
private String _encoding;
private BufferInputStream _in;
private Reader _encodingReader;
public BodyResponseStream()
{
}
/**
* Returns true for a caucho response stream.
*/
public boolean isCauchoResponseStream()
{
return true;
}
public void setWriter(Writer out)
{
_out = out;
_encoding = null;
_encodingReader = null;
}
@Override
public String getEncoding()
{
return _encoding;
}
public void setEncoding(String encoding)
{
_encoding = encoding;
}
/**
* Sets the buffer size.
*/
public void setBufferSize(int size)
{
}
/**
* Gets the buffer size.
*/
public int getBufferSize()
{
return SIZE;
}
/**
* Returns the remaining buffer entries.
*/
public int getRemaining()
{
return SIZE;
}
/**
* 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 {
_out.write(_charBuffer, 0, offset);
} catch (IOException e) {
log.log(Level.FINER, e.toString(), e);
}
}
}
/**
* Returns the next char buffer.
*/
public char []nextCharBuffer(int offset)
throws IOException
{
if (offset > 0)
_out.write(_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(char []buf, int offset, int length)
throws IOException
{
if (length == 0)
return;
_out.write(buf, offset, length);
}
/**
* 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 print(int ch)
throws IOException
{
_out.write(ch);
}
/**
* Returns the buffer offset.
*/
@Override
public int getBufferOffset()
{
return 0;
}
/**
* Sets the byte buffer offset.
*/
@Override
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
*/
@Override
public byte []getBuffer()
{
return _byteBuffer;
}
/**
* Returns the next buffer.
*/
@Override
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
*/
@Override
public void write(byte []buf, int offset, int length)
throws IOException
{
if (length == 0)
return;
if (_encodingReader == null) {
if (_in == null)
_in = new BufferInputStream();
_encodingReader = Encoding.getReadEncoding(_in, _encoding);
}
if (_encodingReader == null) {
for (; length > 0; length--) {
print((char) (buf[offset++] & 0xff));
}
return;
}
_in.init(buf, offset, length);
int ch;
while ((ch = _encodingReader.read()) >= 0) {
print(ch);
}
}
/**
* Writes the next chunk of data to the response stream.
*
* @param ch - character to write
*/
@Override
public void write(int ch)
throws IOException
{
if (_encodingReader == null) {
if (_in == null)
_in = new BufferInputStream();
_byteBuffer[0] = (byte) ch;
_encodingReader = Encoding.getReadEncoding(_in, _encoding);
}
if (_encodingReader == null) {
print((char) ch);
return;
}
_in.init(_byteBuffer, 0, 1);
while ((ch = _encodingReader.read()) >= 0) {
print(ch);
}
}
/**
* Flushes the buffer.
*/
@Override
public void flushBuffer()
throws IOException
{
}
/**
* Clears the buffer.
*/
public void clearBuffer()
{
}
static class BufferInputStream extends InputStream {
private byte []_buffer;
private int _offset;
private int _length;
void init(byte []buffer, int offset, int length)
{
_buffer = buffer;
_offset = offset;
_length = length;
}
public int read()
{
if (_offset < _length)
return _buffer[_offset++] & 0xff;
else
return -1;
}
}
}