001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.rest.processor;
018
019import static org.apache.juneau.common.utils.IOUtils.*;
020
021import java.io.*;
022
023import org.apache.juneau.rest.*;
024
025/**
026 * Response processor for {@link InputStream} objects.
027 *
028 * <p>
029 * Simply pipes the contents of the {@link InputStream} to {@link RestResponse#getNegotiatedOutputStream()}.
030 *
031 * <h5 class='section'>See Also:</h5><ul>
032 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/ResponseProcessors">Response Processors</a>
033 * </ul>
034 */
035public class InputStreamProcessor implements ResponseProcessor {
036
037   @Override /* ResponseProcessor */
038   public int process(RestOpSession opSession) throws IOException {
039
040      RestResponse res = opSession.getResponse();
041      InputStream is = res.getContent(InputStream.class);
042
043      if (is == null)
044         return NEXT;
045
046      try (InputStream is2 = is; OutputStream os = res.getNegotiatedOutputStream()) {
047         pipe(is2, os);
048      }
049
050      return FINISHED;
051   }
052}