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// ========================================================================
// Copyright (c) 2004-2009 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.servlets;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.gzip.CompressedResponseWrapper;
import org.eclipse.jetty.http.gzip.CompressedStream;
import org.eclipse.jetty.http.gzip.CompressionType;
import org.eclipse.jetty.http.gzip.DeflateStreamImpl;
import org.eclipse.jetty.http.gzip.GzipResponseWrapperImpl;
import org.eclipse.jetty.http.gzip.GzipStreamImpl;
import org.eclipse.jetty.io.UncheckedPrintWriter;
/* ------------------------------------------------------------ */
/** Includable GZip Filter.
* This extension to the {@link GzipFilter} that uses Jetty features to allow
* headers to be set during calls to
* {@link javax.servlet.RequestDispatcher#include(javax.servlet.ServletRequest, javax.servlet.ServletResponse)}.
* This allows the gzip filter to function correct during includes and to make a decision to gzip or not
* at the time the buffer fills and on the basis of all response headers.
*
* If the init parameter "uncheckedPrintWriter" is set to "true", then the PrintWriter used by
* the wrapped getWriter will be {@link UncheckedPrintWriter}.
*
*/
public class IncludableGzipFilter extends GzipFilter
{
boolean _uncheckedPrintWriter=false;
@Override
public void init(FilterConfig filterConfig) throws ServletException
{
super.init(filterConfig);
String tmp=filterConfig.getInitParameter("uncheckedPrintWriter");
if (tmp!=null)
_uncheckedPrintWriter=Boolean.valueOf(tmp).booleanValue();
}
@Override
protected CompressedResponseWrapper createWrappedResponse(HttpServletRequest request, HttpServletResponse response, CompressionType compressionType)
{
return new IncludableResponseWrapper(request,response);
}
public class IncludableResponseWrapper extends GzipResponseWrapperImpl
{
public IncludableResponseWrapper(HttpServletRequest request, HttpServletResponse response)
{
super(request,response);
super.setMimeTypes(IncludableGzipFilter.this._mimeTypes);
super.setBufferSize(IncludableGzipFilter.this._bufferSize);
super.setMinCompressSize(IncludableGzipFilter.this._minGzipSize);
}
@Override
protected CompressedStream newCompressedStream(HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize,
int minGzipSize) throws IOException
{
String encodingHeader = request.getHeader("accept-encoding");
CompressionType compressionType = CompressionType.getByEncodingHeader(encodingHeader);
if (compressionType.equals(CompressionType.GZIP))
{
return new IncludableGzipStream(request,response,contentLength,bufferSize,minGzipSize);
}
else if (compressionType.equals(CompressionType.DEFLATE))
{
return new IncludableDeflateStream(request,response,contentLength,bufferSize,minGzipSize);
}
else
{
throw new IllegalStateException(compressionType.name() + " not supported.");
}
}
@Override
protected PrintWriter newWriter(OutputStream out, String encoding) throws UnsupportedEncodingException
{
if (_uncheckedPrintWriter)
return encoding == null?new UncheckedPrintWriter(out):new UncheckedPrintWriter(new OutputStreamWriter(out,encoding));
return super.newWriter(out,encoding);
}
}
public class IncludableGzipStream extends GzipStreamImpl
{
public IncludableGzipStream(HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize, int minGzipSize)
throws IOException
{
super(request,response,contentLength,bufferSize,minGzipSize);
}
@Override
protected boolean setContentEncoding()
{
if (_request.getAttribute("javax.servlet.include.request_uri") != null)
{
_response.setHeader("org.eclipse.jetty.server.include.Content-Encoding","gzip");
}
else
{
_response.setHeader("Content-Encoding","gzip");
}
return _response.containsHeader("Content-Encoding");
}
}
public class IncludableDeflateStream extends DeflateStreamImpl
{
public IncludableDeflateStream(HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize, int minGzipSize)
throws IOException
{
super(request,response,contentLength,bufferSize,minGzipSize);
}
@Override
protected boolean setContentEncoding()
{
if (_request.getAttribute("javax.servlet.include.request_uri") != null)
{
_response.setHeader("org.eclipse.jetty.server.include.Content-Encoding","deflate");
}
else
{
_response.setHeader("Content-Encoding","deflate");
}
return _response.containsHeader("Content-Encoding");
}
}
}
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