/*
* 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 SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.servlets.ssi;
import com.caucho.filters.CauchoResponseWrapper;
import com.caucho.util.L10N;
import com.caucho.vfs.ReadStream;
import com.caucho.vfs.TempStream;
import com.caucho.vfs.Vfs;
import com.caucho.vfs.WriteStream;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Logger;
/**
* Filters the result as SSI.
*/
public class SSIFilter implements Filter {
private static final L10N L = new L10N(SSIFilter.class);
private static final Logger log
= Logger.getLogger(SSIFilter.class.getName());
private SSIFactory _factory;
/**
* Set's the SSIFactory, default is a factory that handles
* the standard Apache SSI commands.
*/
public void setFactory(SSIFactory factory)
{
_factory = factory;
}
public void init(FilterConfig config)
throws ServletException
{
if (_factory == null)
_factory = new SSIFactory();
}
/**
* Creates a wrapper to save the output.
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain nextFilter)
throws ServletException, IOException
{
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
SSIResponse ssiResponse = new SSIResponse(req, res);
nextFilter.doFilter(req, ssiResponse);
ssiResponse.finish(req, res);
}
/**
* Any cleanup for the filter.
*/
public void destroy()
{
}
class SSIResponse extends CauchoResponseWrapper {
private HttpServletRequest _request;
private TempStream _tempStream;
private WriteStream _out;
SSIResponse(HttpServletRequest request, HttpServletResponse response)
{
_request = request;
_tempStream = new TempStream();
_tempStream.openWrite();
_out = new WriteStream(_tempStream);
init(response);
}
/**
* This needs to be bypassed because the file's content
* length has nothing to do with the returned length.
*/
public void setContentLength(int length)
{
}
/**
* Calculates and returns the proper stream.
*/
protected OutputStream getStream() throws IOException
{
return _out;
}
/**
* Complets the request.
*/
public void finish(HttpServletRequest req,
HttpServletResponse res)
throws IOException, ServletException
{
flushBuffer();
_out.close();
ReadStream is = _tempStream.openRead();
Statement stmt = null;
try {
stmt = new SSIParser(_factory).parse(is);
} finally {
is.close();
}
try {
WriteStream out = Vfs.openWrite(res.getOutputStream());
stmt.apply(out, req, res);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}