package org.mortbay.servlet.jetty;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.mortbay.jetty.HttpConnection;
import org.mortbay.servlet.GzipFilter;
/* ------------------------------------------------------------ */
/** Includable GZip Filter.
* This extension to the {@link GzipFilter} that uses Jetty APIs 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.
*
* @author gregw
*
*/
public class IncludableGzipFilter extends GzipFilter
{
protected GZIPResponseWrapper newGZIPResponseWrapper(HttpServletRequest request, HttpServletResponse response)
{
return new IncludableResponseWrapper(request,response);
}
public class IncludableResponseWrapper extends GzipFilter.GZIPResponseWrapper
{
public IncludableResponseWrapper(HttpServletRequest request, HttpServletResponse response)
{
super(request,response);
}
protected GzipStream newGzipStream(HttpServletRequest request,HttpServletResponse response,long contentLength,int bufferSize, int minGzipSize) throws IOException
{
return new IncludableGzipStream(request,response,contentLength,bufferSize,minGzipSize);
}
}
public class IncludableGzipStream extends GzipFilter.GzipStream
{
public IncludableGzipStream(HttpServletRequest request, HttpServletResponse response, long contentLength, int bufferSize, int minGzipSize)
throws IOException
{
super(request,response,contentLength,bufferSize,minGzipSize);
}
protected boolean setContentEncodingGzip()
{
HttpConnection connection = HttpConnection.getCurrentConnection();
connection.getResponseFields().put("Content-Encoding", "gzip");
return true;
}
}
}