org.apache.tika.parser.microsoft.MSOwnerFileParser Maven / Gradle / Ivy
/*
* 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;
import org.apache.commons.io.IOUtils;
import org.apache.tika.Tika;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.metadata.TikaCoreProperties;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.AbstractParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.Set;
/**
* Parser for temporary MSOFfice files.
* This currently only extracts the owner's name.
*/
public class MSOwnerFileParser extends AbstractParser {
private static final int ASCII_CHUNK_LENGTH = 54;
private static final MediaType MEDIA_TYPE = MediaType.application("x-ms-owner");
/**
* Serial version UID
*/
private static final long serialVersionUID = -752276948656079347L;
private static final Set SUPPORTED_TYPES =
Collections.singleton(MEDIA_TYPE);
public Set getSupportedTypes(ParseContext context) {
return SUPPORTED_TYPES;
}
/**
* Extracts owner from MS temp file
*/
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
byte[] asciiNameBytes = new byte[ASCII_CHUNK_LENGTH];
IOUtils.readFully(stream, asciiNameBytes);
int asciiNameLength = (int)asciiNameBytes[0];//don't need to convert to unsigned int because it can't be that long
//sanity check name length
if (asciiNameLength < 0) {
throw new TikaException("ascii name length must be >= 0");
} else if (asciiNameLength > ASCII_CHUNK_LENGTH) {
throw new TikaException("ascii name length must be < 55");
}
String asciiName = new String(asciiNameBytes, 1, asciiNameLength, StandardCharsets.US_ASCII);
metadata.set(TikaCoreProperties.MODIFIER, asciiName);
int unicodeCharLength = stream.read();
if (asciiNameLength == unicodeCharLength) {
stream.read();//zero after the char length
byte[] unicodeBytes = new byte[unicodeCharLength * 2];
IOUtils.readFully(stream, unicodeBytes);
String unicodeName = new String(unicodeBytes, StandardCharsets.UTF_16LE);
metadata.set(TikaCoreProperties.MODIFIER, unicodeName);
} else {
throw new TikaException("Ascii name length should be the same as the unicode length");
}
xhtml.endDocument();
}
}