/** * Copyright (c) 2003-2005 , David A. Czarnecki * All rights reserved. * * Portions Copyright (c) 2003-2005 by Mark Lussier * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the "David A. Czarnecki" and "blojsom" nor the names of * its contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * Products derived from this software may not be called "blojsom", * nor may "blojsom" appear in their name, without prior written permission of * David A. Czarnecki. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.blojsom.filter; import org.blojsom.util.BlojsomConstants; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpServletResponseWrapper; import java.io.IOException; import java.io.OutputStreamWriter; import java.io.PrintWriter; /** * GZIPResponseWrapper *

* Copyright 2003 Jayson Falkner (jayson@jspinsider.com) * This code is from "Servlets and JavaServer pages; the J2EE Web Tier", * http://www.jspbook.com. You may freely use the code both commercially * and non-commercially. If you like the code, please pick up a copy of * the book and help support the authors, development of more free code, * and the JSP/Servlet/J2EE community. * * @version $Id: GZIPResponseWrapper.java,v 1.2.2.1 2005/07/21 14:11:03 johnan Exp $ * @since blojsom 2.10 */ public class GZIPResponseWrapper extends HttpServletResponseWrapper { protected HttpServletResponse origResponse = null; protected ServletOutputStream stream = null; protected PrintWriter writer = null; /** * Create a new GZIPResponseWrapper * * @param response Original HTTP servlet response */ public GZIPResponseWrapper(HttpServletResponse response) { super(response); origResponse = response; } /** * Create a new ServletOutputStream which returns a GZIPResponseStream * * @return GZIPResponseStream object * @throws IOException If there is an error creating the response stream */ public ServletOutputStream createOutputStream() throws IOException { return (new GZIPResponseStream(origResponse)); } /** * Finish the response */ public void finishResponse() throws IOException { if (writer != null) { writer.close(); } else { if (stream != null) { stream.close(); } } } /** * Flush the output buffer * * @throws IOException If there is an error flushing the buffer */ public void flushBuffer() throws IOException { stream.flush(); } /** * Retrieve the output stream for this response wrapper * * @return {@link #createOutputStream()} * @throws IOException If there is an error retrieving the output stream */ public ServletOutputStream getOutputStream() throws IOException { if (writer != null) { throw new IllegalStateException("getWriter() has already been called."); } if (stream == null) stream = createOutputStream(); return (stream); } /** * Retrieve a writer for this response wrapper * * @return PrintWriter that wraps an OutputStreamWriter (using UTF-8 as encoding) * @throws IOException If there is an error retrieving the writer */ public PrintWriter getWriter() throws IOException { if (writer != null) { return (writer); } if (stream != null) { throw new IllegalStateException("getOutputStream() has already been called."); } stream = createOutputStream(); writer = new PrintWriter(new OutputStreamWriter(stream, BlojsomConstants.UTF8)); return (writer); } /** * Set the content length for the response. Currently a no-op. * * @param length Content length */ public void setContentLength(int length) { } }