/*
* 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.
*/
package com.liusoft.dlog4j.servlet;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
/**
* GZIP��Response��װ
*
* @author Winter Lau
*/
public class GZIPResponseWrapper extends HttpServletResponseWrapper {
protected HttpServletResponse origResponse = null;
protected ServletOutputStream stream = null;
protected PrintWriter writer = null;
public GZIPResponseWrapper(HttpServletResponse response) {
super(response);
origResponse = response;
}
public ServletOutputStream createOutputStream() throws IOException {
return (new GZIPResponseStream(origResponse));
}
public void finishResponse() {
try {
if (writer != null) {
writer.close();
} else {
if (stream != null) {
stream.close();
}
}
} catch (IOException e) {
}
}
public void flushBuffer() throws IOException {
stream.flush();
}
public ServletOutputStream getOutputStream() throws IOException {
if (writer != null) {
throw new IllegalStateException(
"getWriter() has already been called!");
}
if (stream == null)
stream = createOutputStream();
return (stream);
}
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, "UTF-8"));
return (writer);
}
public void setContentLength(int length) {
}
}