001/* 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019package org.apache.hadoop.hbase.rest.filter; 020 021import java.io.IOException; 022import java.util.zip.GZIPOutputStream; 023 024import javax.servlet.ServletOutputStream; 025import javax.servlet.WriteListener; 026import javax.servlet.http.HttpServletResponse; 027 028import org.apache.yetus.audience.InterfaceAudience; 029 030@InterfaceAudience.Private 031public class GZIPResponseStream extends ServletOutputStream { 032 private HttpServletResponse response; 033 private GZIPOutputStream out; 034 035 public GZIPResponseStream(HttpServletResponse response) throws IOException { 036 this.response = response; 037 this.out = new GZIPOutputStream(response.getOutputStream()); 038 response.addHeader("Content-Encoding", "gzip"); 039 } 040 041 public void resetBuffer() { 042 if (out != null && !response.isCommitted()) { 043 response.setHeader("Content-Encoding", null); 044 } 045 out = null; 046 } 047 048 @Override 049 public void write(int b) throws IOException { 050 out.write(b); 051 } 052 053 @Override 054 public void write(byte[] b) throws IOException { 055 out.write(b); 056 } 057 058 @Override 059 public void write(byte[] b, int off, int len) throws IOException { 060 out.write(b, off, len); 061 } 062 063 @Override 064 public void close() throws IOException { 065 finish(); 066 out.close(); 067 } 068 069 @Override 070 public void flush() throws IOException { 071 out.flush(); 072 } 073 074 public void finish() throws IOException { 075 out.finish(); 076 } 077 078 @Override 079 public boolean isReady() { 080 throw new UnsupportedOperationException("Asynchonous operation is not supported."); 081 } 082 083 @Override 084 public void setWriteListener(WriteListener writeListener) { 085 throw new UnsupportedOperationException("Asynchonous operation is not supported."); 086 } 087}