org.commonjava.maven.galley.transport.htcli.util.HttpUtil.java Source code

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Here is the source code for org.commonjava.maven.galley.transport.htcli.util.HttpUtil.java

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/**
 * Copyright (C) 2013 Red Hat, Inc. (jdcasey@commonjava.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.commonjava.maven.galley.transport.htcli.util;

import static org.apache.commons.io.IOUtils.closeQuietly;

import org.apache.http.Header;
import org.apache.http.client.methods.AbstractExecutionAwareRequest;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;

public final class HttpUtil {

    private static final String CONTENT_LENGTH = "Content-Length";

    private HttpUtil() {
    }

    public static void cleanupResources(final CloseableHttpClient client, final HttpUriRequest request,
            final CloseableHttpResponse response) {
        if (response != null && response.getEntity() != null) {
            EntityUtils.consumeQuietly(response.getEntity());
            closeQuietly(response);
        }

        if (request != null) {
            if (request instanceof AbstractExecutionAwareRequest) {
                ((AbstractExecutionAwareRequest) request).reset();
            }
        }

        if (client != null) {
            closeQuietly(client);
        }
    }

    public static long getContentLength(CloseableHttpResponse response) {
        if (response == null) {
            return -1;
        }

        Header header = response.getFirstHeader(CONTENT_LENGTH);
        return header == null ? 0 : Long.parseLong(header.getValue());
    }
}