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This project contains some of the configurable modules used within the Heritrix application to crawl the web. The modules in this project can be used in applications other than Heritrix, however.

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/*
 *  This file is part of the Heritrix web crawler (crawler.archive.org).
 *
 *  Licensed to the Internet Archive (IA) by one or more individual 
 *  contributors. 
 *
 *  The IA 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.
 */
package org.archive.modules.extractor;

import java.util.logging.Logger;

import org.archive.modules.CrawlURI;

/**
 * Extended version of ExtractorHTML with more aggressive javascript link
 * extraction where javascript code is parsed first with general HTML tags
 * regex, and than by javascript speculative link regex.
 *
 * @author Igor Ranitovic
 *
 */
public class AggressiveExtractorHTML
extends ExtractorHTML {
    @SuppressWarnings("unused")
    private static final long serialVersionUID = 3L;

    protected static Logger logger =
        Logger.getLogger(AggressiveExtractorHTML.class.getName());
    
    public AggressiveExtractorHTML() {
    }

    protected void processScript(CrawlURI curi, CharSequence sequence,
            int endOfOpenTag) {
        super.processScript(curi, sequence, endOfOpenTag);
        // then, proccess entire javascript code as html code
        // this may cause a lot of false positves
        processGeneralTag(curi, sequence.subSequence(0,6),
            sequence.subSequence(endOfOpenTag, sequence.length()));
    }
}