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,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027
028package org.apache.http.nio.protocol;
029
030import java.io.IOException;
031
032import org.apache.http.HttpEntity;
033import org.apache.http.HttpResponse;
034import org.apache.http.nio.ContentEncoder;
035import org.apache.http.nio.IOControl;
036import org.apache.http.nio.entity.EntityAsyncContentProducer;
037import org.apache.http.nio.entity.HttpAsyncContentProducer;
038import org.apache.http.protocol.HTTP;
039import org.apache.http.protocol.HttpContext;
040
041/**
042 * This class changed from package private to public in version 4.4.8.
043 *
044 * @since 4.4.8
045 */
046public class ErrorResponseProducer implements HttpAsyncResponseProducer {
047
048    private final HttpResponse response;
049    private final HttpEntity entity;
050    private final HttpAsyncContentProducer contentProducer;
051    private final boolean keepAlive;
052
053    public ErrorResponseProducer(
054            final HttpResponse response,
055            final HttpEntity entity,
056            final boolean keepAlive) {
057        super();
058        this.response = response;
059        this.entity = entity;
060        if (entity instanceof HttpAsyncContentProducer) {
061            this.contentProducer = (HttpAsyncContentProducer) entity;
062        } else {
063            this.contentProducer = new EntityAsyncContentProducer(entity);
064        }
065        this.keepAlive = keepAlive;
066    }
067
068    @Override
069    public HttpResponse generateResponse() {
070        if (this.keepAlive) {
071            response.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE);
072        } else {
073            response.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);
074        }
075        response.setEntity(this.entity);
076        return response;
077    }
078
079    @Override
080    public void produceContent(
081            final ContentEncoder encoder, final IOControl ioctrl) throws IOException {
082        this.contentProducer.produceContent(encoder, ioctrl);
083    }
084
085    @Override
086    public void responseCompleted(final HttpContext context) {
087    }
088
089    @Override
090    public void failed(final Exception ex) {
091    }
092
093    @Override
094    public void close() throws IOException {
095        this.contentProducer.close();
096    }
097
098}