/*
* 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.chm;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.apache.tika.exception.TikaException;
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.parser.chm.accessor.DirectoryListingEntry;
import org.apache.tika.parser.chm.core.ChmExtractor;
import org.apache.tika.parser.html.HtmlParser;
import org.apache.tika.sax.BodyContentHandler;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
public class ChmParser extends AbstractParser {
/** Serial version UID */
private static final long serialVersionUID = 5938777307516469802L;
private static final Set<MediaType> SUPPORTED_TYPES =
Collections.unmodifiableSet(new HashSet<MediaType>(Arrays.asList(
MediaType.application("vnd.ms-htmlhelp"),
MediaType.application("chm"),
MediaType.application("x-chm"))));
public Set<MediaType> getSupportedTypes(ParseContext context) {
return SUPPORTED_TYPES;
}
public void parse(InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context) throws IOException,
SAXException, TikaException {
ChmExtractor chmExtractor = new ChmExtractor(stream);
// metadata
metadata.set(Metadata.CONTENT_TYPE, "application/vnd.ms-htmlhelp");
// content
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
Iterator<DirectoryListingEntry> it =
chmExtractor.getChmDirList().getDirectoryListingEntryList().iterator();
while (it.hasNext()) {
DirectoryListingEntry entry = it.next();
if (entry.getName().endsWith(".html") || entry.getName().endsWith(".htm")) {
xhtml.characters(extract(chmExtractor.extractChmEntry(entry)));
}
}
xhtml.endDocument();
}
/**
* Extracts data from byte[]
*/
private String extract(byte[] byteObject) throws TikaException {// throws IOException
StringBuilder wBuf = new StringBuilder();
InputStream stream = null;
Metadata metadata = new Metadata();
HtmlParser htmlParser = new HtmlParser();
BodyContentHandler handler = new BodyContentHandler(-1);// -1
ParseContext parser = new ParseContext();
try {
stream = new ByteArrayInputStream(byteObject);
htmlParser.parse(stream, handler, metadata, parser);
wBuf.append(handler.toString()
+ System.getProperty("line.separator"));
} catch (SAXException e) {
throw new RuntimeException(e);
} catch (IOException e) {
// Pushback overflow from tagsoup
}
return wBuf.toString();
}
}