| /* |
| * Copyright 2010 The Apache Software Foundation |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.hbase.stargate.filter; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| |
| import javax.servlet.ServletOutputStream; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.servlet.http.HttpServletResponseWrapper; |
| |
| public class GZIPResponseWrapper extends HttpServletResponseWrapper { |
| private HttpServletResponse response; |
| private GZIPResponseStream os; |
| private PrintWriter writer; |
| private boolean compress = true; |
| |
| public GZIPResponseWrapper(HttpServletResponse response) { |
| super(response); |
| this.response = response; |
| } |
| |
| @Override |
| public void setStatus(int status) { |
| if (status < 200 || status >= 300) { |
| compress = false; |
| } |
| } |
| |
| @Override |
| public void addHeader(String name, String value) { |
| if (!"content-length".equalsIgnoreCase(name)) { |
| super.addHeader(name, value); |
| } |
| } |
| |
| @Override |
| public void setContentLength(int length) { |
| // do nothing |
| } |
| |
| @Override |
| public void setIntHeader(String name, int value) { |
| if (!"content-length".equalsIgnoreCase(name)) { |
| super.setIntHeader(name, value); |
| } |
| } |
| |
| @Override |
| public void setHeader(String name, String value) { |
| if (!"content-length".equalsIgnoreCase(name)) { |
| super.setHeader(name, value); |
| } |
| } |
| |
| @Override |
| public void flushBuffer() throws IOException { |
| if (writer != null) { |
| writer.flush(); |
| } |
| if (os != null) { |
| os.finish(); |
| } else { |
| getResponse().flushBuffer(); |
| } |
| } |
| |
| @Override |
| public void reset() { |
| super.reset(); |
| if (os != null) { |
| os.resetBuffer(); |
| } |
| writer = null; |
| os = null; |
| compress = true; |
| } |
| |
| @Override |
| public void resetBuffer() { |
| super.resetBuffer(); |
| if (os != null) { |
| os.resetBuffer(); |
| } |
| writer = null; |
| os = null; |
| } |
| |
| @Override |
| public void sendError(int status, String msg) throws IOException { |
| resetBuffer(); |
| super.sendError(status, msg); |
| } |
| |
| @Override |
| public void sendError(int status) throws IOException { |
| resetBuffer(); |
| super.sendError(status); |
| } |
| |
| @Override |
| public void sendRedirect(String location) throws IOException { |
| resetBuffer(); |
| super.sendRedirect(location); |
| } |
| |
| @Override |
| public ServletOutputStream getOutputStream() throws IOException { |
| if (!response.isCommitted() && compress) { |
| if (os == null) { |
| os = new GZIPResponseStream(response); |
| } |
| return os; |
| } else { |
| return response.getOutputStream(); |
| } |
| } |
| |
| @Override |
| public PrintWriter getWriter() throws IOException { |
| if (writer == null) { |
| writer = new PrintWriter(getOutputStream()); |
| } |
| return writer; |
| } |
| } |