com.liferay.rss.web.internal.util.RSSWebCacheItem Maven / Gradle / Ivy

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Liferay RSS Web
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/**
 * SPDX-FileCopyrightText: (c) 2000 Liferay, Inc. https://liferay.com
 * SPDX-License-Identifier: LGPL-2.1-or-later OR LicenseRef-Liferay-DXP-EULA-2.0.0-2023-06
 */

package com.liferay.rss.web.internal.util;

import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.Http;
import com.liferay.portal.kernel.util.HttpUtil;
import com.liferay.portal.kernel.util.Time;
import com.liferay.portal.kernel.webcache.WebCacheException;
import com.liferay.portal.kernel.webcache.WebCacheItem;
import com.liferay.portal.util.PropsValues;
import com.liferay.rss.web.internal.configuration.RSSWebCacheConfiguration;

import com.rometools.rome.io.SyndFeedInput;
import com.rometools.rome.io.XmlReader;

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

import java.net.URL;

import java.util.Objects;

/**
 * @author Brian Wing Shun Chan
 */
public class RSSWebCacheItem implements WebCacheItem {

	public RSSWebCacheItem(
		RSSWebCacheConfiguration rssWebCacheConfiguration, String url) {

		_rssWebCacheConfiguration = rssWebCacheConfiguration;
		_url = url;
	}

	@Override
	public Object convert(String key) throws WebCacheException {

		// com.liferay.portal.kernel.util.HttpUtil will break the connection
		// if it spends more than 5 seconds looking up a location. However,
		// German umlauts do not get encoded correctly. This may be a bug
		// with commons-httpclient or with how FeedParser uses
		// java.io.Reader.

		// Use http://xml.newsisfree.com/feeds/29/629.xml and
		// http://test.domosoft.com/up/RSS to test if German umlauts show up
		// correctly.

		/*Reader reader = new StringReader(
			new String(HttpUtil.URLtoByteArray(_url)));

		channel = FeedParser.parse(builder, reader);*/

		SyndFeedInput input = new SyndFeedInput();

		try (InputStream inputStream = _readURL()) {
			return input.build(
				new XmlReader(inputStream, true, StringPool.UTF8));
		}
		catch (Exception exception) {
			throw new WebCacheException(
				_url + " " + exception.toString(), exception);
		}
	}

	@Override
	public long getRefreshTime() {
		return Time.MINUTE * _rssWebCacheConfiguration.feedTime();
	}

	private InputStream _readURL() throws IOException {
		URL url = new URL(_url);

		if (Objects.equals(url.getProtocol(), "file")) {
			return url.openStream();
		}

		Http.Options options = new Http.Options();

		options.setLocation(_url);
		options.setTimeout(PropsValues.RSS_CONNECTION_TIMEOUT);

		return HttpUtil.URLtoInputStream(options);
	}

	private final RSSWebCacheConfiguration _rssWebCacheConfiguration;
	private final String _url;

}