| /* |
| * 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 java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| 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; |
| |
| /** |
| * 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<MediaType> SUPPORTED_TYPES = Collections.singleton(MEDIA_TYPE); |
| |
| public Set<MediaType> 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 |
| //bounds 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(); |
| } |
| } |