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}