org.apache.tika.parser.microsoft.ooxml.xwpf.ml2006.BinaryDataHandler Maven / Gradle / Ivy
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* 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.microsoft.ooxml.xwpf.ml2006;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.codec.binary.Base64;
import org.apache.tika.exception.TikaException;
import org.apache.tika.extractor.EmbeddedDocumentExtractor;
import org.apache.tika.extractor.EmbeddedDocumentUtil;
import org.apache.tika.io.TikaInputStream;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
class BinaryDataHandler extends AbstractPartHandler {
private final XHTMLContentHandler handler;
private final Metadata metadata;
private final ParseContext parseContext;
private boolean inBinaryData = false;
private StringBuilder buffer = new StringBuilder();
final Base64 base64 = new Base64();
public BinaryDataHandler(XHTMLContentHandler handler, Metadata metadata, ParseContext context) {
this.handler = handler;
this.metadata = metadata;
this.parseContext = context;
}
@Override
public void startDocument() throws SAXException {
}
@Override
public void endDocument() throws SAXException {
}
@Override
public void endPart() throws SAXException, TikaException {
if (hasData()) {
EmbeddedDocumentExtractor embeddedDocumentExtractor =
EmbeddedDocumentUtil.getEmbeddedDocumentExtractor(parseContext);
Metadata embeddedMetadata = new Metadata();
try (TikaInputStream stream = TikaInputStream.get(getInputStream())) {
embeddedDocumentExtractor.parseEmbedded(stream, handler, embeddedMetadata, false);
} catch (IOException e) {
throw new TikaException("error in finishing part", e);
}
buffer.setLength(0);
}
}
@Override
public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
if (uri.equals(Word2006MLDocHandler.PKG_NS) && localName.equals("binaryData")) {
inBinaryData = true;
}
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if (uri.equals(Word2006MLDocHandler.PKG_NS) && localName.equals("binaryData")) {
inBinaryData = false;
}
}
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
if (inBinaryData) {
buffer.append(ch, start, length);
}
}
@Override
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
}
@Override
public String getContentType() {
return "";
}
boolean hasData() {
return buffer.length() > 0;
}
private InputStream getInputStream() {
byte[] bytes = base64.decode(buffer.toString());
return new ByteArrayInputStream(bytes);
}
}