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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package org.apache.http.client.utils;

import java.io.Closeable;
import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.util.EntityUtils;

/**
 * Convenience methods for closing response and client objects.
 *
 * @since 4.2
 */
public class HttpClientUtils {

    private HttpClientUtils() {
    }

    /**
     * Unconditionally close a response.
     * 

* Example Code: * *

     * HttpResponse httpResponse = null;
     * try {
     *     httpResponse = httpClient.execute(httpGet);
     * } catch (Exception e) {
     *     // error handling
     * } finally {
     *     HttpClientUtils.closeQuietly(httpResponse);
     * }
     * 
* * @param response * the HttpResponse to release resources, may be null or already * closed. * * @since 4.2 */ public static void closeQuietly(final HttpResponse response) { if (response != null) { final HttpEntity entity = response.getEntity(); if (entity != null) { try { EntityUtils.consume(entity); } catch (final IOException ex) { } } } } /** * Unconditionally close a response. *

* Example Code: * *

     * HttpResponse httpResponse = null;
     * try {
     *     httpResponse = httpClient.execute(httpGet);
     * } catch (Exception e) {
     *     // error handling
     * } finally {
     *     HttpClientUtils.closeQuietly(httpResponse);
     * }
     * 
* * @param response * the HttpResponse to release resources, may be null or already * closed. * * @since 4.3 */ public static void closeQuietly(final CloseableHttpResponse response) { if (response != null) { try { try { EntityUtils.consume(response.getEntity()); } finally { response.close(); } } catch (final IOException ignore) { } } } /** * Unconditionally close a httpClient. Shuts down the underlying connection * manager and releases the resources. *

* Example Code: * *

     * HttpClient httpClient = HttpClients.createDefault();
     * try {
     *   httpClient.execute(request);
     * } catch (Exception e) {
     *   // error handling
     * } finally {
     *   HttpClientUtils.closeQuietly(httpClient);
     * }
     * 
* * @param httpClient * the HttpClient to close, may be null or already closed. * @since 4.2 */ public static void closeQuietly(final HttpClient httpClient) { if (httpClient != null) { if (httpClient instanceof Closeable) { try { ((Closeable) httpClient).close(); } catch (final IOException ignore) { } } } } }




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