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.http.HttpHeaders.*;
020
021import java.io.*;
022
023import org.apache.http.*;
024import org.apache.juneau.rest.*;
025
026/**
027 * Response handler for {@link HttpResponse} objects.
028 *
029 * <h5 class='section'>See Also:</h5><ul>
030 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/ResponseProcessors">Response Processors</a>
031 * </ul>
032 */
033public class HttpResponseProcessor implements ResponseProcessor {
034
035   @Override /* ResponseProcessor */
036   public int process(RestOpSession opSession) throws IOException {
037
038      RestResponse res = opSession.getResponse();
039      HttpResponse r = res.getContent(HttpResponse.class);
040
041      if (r == null)
042         return NEXT;
043
044      opSession.status(r.getStatusLine());
045
046      HttpEntity e = r.getEntity();
047
048      res.setHeader(e.getContentType());
049      res.setHeader(e.getContentEncoding());
050      long contentLength = e.getContentLength();
051      if (contentLength >= 0)
052         res.setHeader(contentLength(contentLength));
053
054      r.headerIterator().forEachRemaining(x -> res.addHeader((Header)x)); // No iterator involved.
055
056      try (OutputStream os = res.getNegotiatedOutputStream()) {
057         e.writeTo(os);
058         os.flush();
059      }
060
061      return FINISHED;
062   }
063}
064