XMLRetrievalService.java

/**
 * Copyright 2008 The University of North Carolina at Chapel Hill
 *
 * 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 edu.unc.lib.dl.ui.service;

import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.jdom2.Document;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;

public class XMLRetrievalService {
	public static Document getXMLDocument(String url) throws HttpException, IOException, JDOMException {
		SAXBuilder builder = new SAXBuilder();

		CloseableHttpClient client = HttpClients.createDefault();
		HttpGet method = new HttpGet(url);
		RequestConfig requestConfig = RequestConfig.custom()
				.setSocketTimeout(2000)
				.setConnectTimeout(2000)
				.setCookieSpec(CookieSpecs.IGNORE_COOKIES)
				.build();
		method.setConfig(requestConfig);

		InputStream responseStream = null;
		Document document = null;

		try (CloseableHttpResponse response = client.execute(method)) {
			HttpEntity entity = response.getEntity();
			responseStream = entity.getContent();
			document = builder.build(responseStream);
		}

		return document;
	}
}