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 */
019
020package org.apache.hadoop.hbase.rest.filter;
021
022import java.io.IOException;
023import java.util.zip.GZIPOutputStream;
024
025import javax.servlet.ServletOutputStream;
026import javax.servlet.WriteListener;
027import javax.servlet.http.HttpServletResponse;
028
029import org.apache.yetus.audience.InterfaceAudience;
030
031@InterfaceAudience.Private
032public class GZIPResponseStream extends ServletOutputStream
033{
034  private HttpServletResponse response;
035  private GZIPOutputStream out;
036
037  public GZIPResponseStream(HttpServletResponse response) throws IOException {
038    this.response = response;
039    this.out = new GZIPOutputStream(response.getOutputStream());
040    response.addHeader("Content-Encoding", "gzip");
041  }
042
043  public void resetBuffer() {
044    if (out != null && !response.isCommitted()) {
045      response.setHeader("Content-Encoding", null);
046    }
047    out = null;
048  }
049
050  @Override
051  public void write(int b) throws IOException {
052    out.write(b);
053  }
054
055  @Override
056  public void write(byte[] b) throws IOException {
057    out.write(b);
058  }
059
060  @Override
061  public void write(byte[] b, int off, int len) throws IOException {
062    out.write(b, off, len);
063  }
064
065  @Override
066  public void close() throws IOException {
067    finish();
068    out.close();
069  }
070
071  @Override
072  public void flush() throws IOException {
073    out.flush();
074  }
075
076  public void finish() throws IOException {
077    out.finish();
078  }
079
080  @Override
081  public boolean isReady() {
082    throw new UnsupportedOperationException("Asynchonous operation is not supported.");
083  }
084
085  @Override
086  public void setWriteListener(WriteListener writeListener) {
087    throw new UnsupportedOperationException("Asynchonous operation is not supported.");
088  }
089}