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Async Http Client library purpose is to allow Java applications to easily execute HTTP requests and asynchronously process the HTTP responses.

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/*
 * Copyright (c) 2010-2012 Sonatype, Inc. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */
package com.ning.http.client.providers.apache;

import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpMethodBase;

import com.ning.http.client.FluentCaseInsensitiveStringsMap;
import com.ning.http.client.HttpResponseHeaders;

/**
 * A class that represent the HTTP headers.
 */
public class ApacheResponseHeaders extends HttpResponseHeaders {

    private final HttpMethodBase method;
    private final FluentCaseInsensitiveStringsMap headers;

    public ApacheResponseHeaders(HttpMethodBase method) {
        super(false);
        this.method = method;
        headers = computerHeaders();
    }

    private FluentCaseInsensitiveStringsMap computerHeaders() {
        FluentCaseInsensitiveStringsMap h = new FluentCaseInsensitiveStringsMap();

        Header[] uh = method.getResponseHeaders();

        for (Header e : uh) {
            if (e.getName() != null) {
                h.add(e.getName(), e.getValue());
            }
        }

        uh = method.getResponseFooters();
        for (Header e : uh) {
            if (e.getName() != null) {
                h.add(e.getName(), e.getValue());
            }
        }

        return h;
    }

    /**
     * Return the HTTP header
     *
     * @return an {@link com.ning.http.client.FluentCaseInsensitiveStringsMap}
     */
    @Override
    public FluentCaseInsensitiveStringsMap getHeaders() {
        return headers;
    }
}