/*
* 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.
*/
package org.apache.tika.parser.epub;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Set;
import javax.xml.XMLConstants;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.apache.tika.exception.TikaException;
import org.apache.tika.io.CloseShieldInputStream;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.AbstractParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.OfflineContentHandler;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
/**
* Parser for EPUB OPS <code>*.html</code> files.
*
* For the time being, assume XHTML (TODO: DTBook)
*/
public class EpubContentParser extends AbstractParser {
public Set<MediaType> getSupportedTypes(ParseContext context) {
return Collections.emptySet(); // not a top-level parser
}
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
final XHTMLContentHandler xhtml =
new XHTMLContentHandler(handler,metadata);
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(false);
factory.setNamespaceAware(true);
try {
factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
} catch (SAXNotRecognizedException e) {
// TIKA-329: Some XML parsers do not support the secure-processing
// feature, even though it's required by JAXP in Java 5. Ignoring
// the exception is fine here, deployments without this feature
// are inherently vulnerable to XML denial-of-service attacks.
}
SAXParser parser = factory.newSAXParser();
parser.parse(
new CloseShieldInputStream(stream),
new OfflineContentHandler(xhtml));
} catch (ParserConfigurationException e) {
throw new TikaException("XML parser configuration error", e);
}
}
}