WebDriverParserAbstract.java

/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2013 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see <http://www.gnu.org/licenses/>.
 **/

package com.jaeksoft.searchlib.parser.htmlParser;

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

import javax.xml.parsers.ParserConfigurationException;

import org.xml.sax.SAXException;

import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.crawler.web.browser.BrowserDriver;
import com.jaeksoft.searchlib.streamlimiter.StreamLimiter;
import com.jaeksoft.searchlib.streamlimiter.StreamLimiterString;
import com.jaeksoft.searchlib.util.IOUtils;
import com.jaeksoft.searchlib.util.StringUtils;

public abstract class WebDriverParserAbstract extends HtmlDocumentProvider {

	protected WebDriverParserAbstract(HtmlParserEnum parserEnum) {
		super(parserEnum);
	}

	protected abstract BrowserDriver<?> getWebDriver()
			throws InstantiationException, IllegalAccessException;

	@Override
	protected DomHtmlNode getDocument(String charset, InputStream inputStream)
			throws SAXException, IOException, ParserConfigurationException {
		throw new IOException("Not allowed");
	}

	@Override
	protected HtmlNodeAbstract<?> getDocument(String htmlSource)
			throws IOException {
		throw new IOException("Not allowed");
	}

	@Override
	protected HtmlNodeAbstract<?> getDocument(String charset,
			StreamLimiter streamLimiter) throws SAXException, IOException,
			ParserConfigurationException, SearchLibException {
		BrowserDriver<?> webDriver = null;
		StringReader reader = null;
		StreamLimiter newStreamLimiter = null;
		try {
			webDriver = getWebDriver();
			String source = webDriver.getSourceCode(streamLimiter
					.getOriginURL());
			String newCharset = StringUtils.charsetDetector(source.getBytes());
			if (newCharset == null)
				newCharset = charset;
			newStreamLimiter = new StreamLimiterString(source,
					streamLimiter.getLimit(),
					streamLimiter.getOriginalFileName(),
					streamLimiter.getOriginURL());

			HtmlDocumentProvider htmlProvider = HtmlParserEnum.BestScoreParser
					.getHtmlParser(newCharset, newStreamLimiter, true);
			return htmlProvider.getRootNode();
		} catch (InstantiationException e) {
			throw new IOException(e);
		} catch (IllegalAccessException e) {
			throw new IOException(e);
		} finally {
			IOUtils.close(webDriver, reader, newStreamLimiter);
		}
	}

	@Override
	public boolean isXPathSupported() {
		return true;
	}
}